EMKR EMCORE Corporation

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

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SCHEDULE TO

TENDER OFFER STATEMENT
UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934

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EMCORE CORPORATION
(Name of Subject Company (Issuer))

EMCORE CORPORATION
(Names of Filing Persons (Offeror))

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Common Stock, no par value
(Title of Class of Securities)

290846203
(CUSIP Number of Class of Securities)

Jeffrey Rittichier
Chief Executive Officer
2015 W. Chestnut Street
Alhambra, California, 91803
Telephone: (626) 293-3400
(Name, address and telephone number of person authorized
to receive notices and communications on behalf of filing persons)

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Copy to:
Brian J. McCarthy, Esq.
Skadden, Arps, Slate, Meagher & Flom LLP
300 South Grand Ave., Suite 3400
Los Angeles, CA 90071
Telephone: (213) 687-5000

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Calculation of Filing Fee

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Check the box if any part of the fee is offset as provided by Rule 0-11(a)(2) and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

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Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer.

Check the appropriate boxes to designate any transactions to which the statement relates:

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third-party tender offer subject to Rule 14d-1.

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issuer tender offer subject to Rule 13e-4.

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going-private transaction subject to Rule 13e-3.

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amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results of the tender offer.    o

If applicable, check the appropriate box(es) below to designate the appropriate rule provision(s) relied upon:

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Rule 13e-4(i) (Cross-Border Issuer Tender Offer)

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Rule 14d-1(d) (Cross-Border Third Party Tender Offer)

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SCHEDULE TO

        This Tender Offer Statement on Schedule TO (this "Schedule TO") relates to the offer by EMCORE Corporation, a New Jersey corporation ("EMCORE" or the "Company"), to purchase shares of its common stock, no par value per share (the "Shares"), up to an aggregate purchase price of $45 million, at a price not greater than $6.75 nor less than $6.25 per Share, net to the seller in cash, less any applicable withholding taxes and without interest. The Company's offer is being made upon the terms and subject to the conditions set forth in the Offer to Purchase dated May 15, 2015 (the "Offer to Purchase") and in the related Letter of Transmittal (the "Letter of Transmittal," which, together with the Offer to Purchase, as they may be amended or supplemented from time to time, constitute the "Offer"), copies of which are attached to this Schedule TO as Exhibits (a)(1)(i) and (a)(1)(ii), respectively. This Schedule TO is intended to satisfy the reporting requirements of Rule 13e-4(c)(2) under the Securities Exchange Act of 1934, as amended.

        The information in the Offer to Purchase and the Letter of Transmittal is incorporated by reference in answer to Items 1 through 11 in this Schedule TO, and as more particularly set forth below.

Item 1.    Summary Term Sheet.

        The information set forth in the section captioned "Summary Term Sheet" in the Offer to Purchase, a copy of which is filed with this Schedule TO as Exhibit (a)(1)(i), is incorporated herein by reference.

Item 2.    Subject Company Information.

        (a)    Name and Address:    The name of the issuer is EMCORE Corporation, a New Jersey corporation. The address of its principal executive office is 2015 W. Chestnut Street, Alhambra, California 91803 and its telephone number is (626) 293-3400.

        (b)    Securities:    The subject securities are the Shares of EMCORE Corporation, which are listed and traded on the NASDAQ Global Market (the "NASDAQ") under the symbol "EMKR." As of May 1, 2015, there were 32,296,486 Shares outstanding.

        (c)    Trading Market and Price:    The information set forth in Section 8 ("Price Range of Shares; Dividends") of the Offer to Purchase is incorporated herein by reference.

Item 3.    Identity and Background of Filing Person.

        (a)    Name and Address:    EMCORE Corporation, a New Jersey corporation, is the filing person and subject company. The address of its principal executive office is 2015 W. Chestnut Street, Alhambra, California 91803 and its telephone number is (626) 293-3400. The information set forth in Section 10 ("Certain Information Concerning the Company") and Section 11 ("Interests of Directors and Executive Officers; Transactions and Arrangements Concerning the Shares") of the Offer to Purchase is incorporated herein by reference.

Item 4.    Terms of the Transaction.

        (a)    Material Terms:    The information set forth in the sections of the Offer to Purchase captioned "Introduction" and "Summary Term Sheet" is incorporated herein by reference. The information set forth in Section 1 ("Number of Shares; Proration"), Section 2 ("Purpose of the Offer; Certain Effects of the Offer"), Section 3 ("Procedures for Tendering Shares"), Section 4 ("Withdrawal Rights"), Section 5 ("Purchase of Shares and Payment of Purchase Price"), Section 6 ("Conditional Tender of Shares"), Section 7 ("Conditions of the Offer"), Section 9 ("Source and Amount of Funds"), Section 11 ("Interests of Directors and Executive Officers; Transactions and Arrangements Concerning

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the Shares"), Section 14 ("Certain United States Federal Income Tax Consequences") and Section 15 ("Extension of the Offer; Termination; Amendment") of the Offer to Purchase is incorporated herein by reference.

        (b)    Purchases:    The information set forth in the sections of the Offer to Purchase captioned "Introduction" and "Summary Term Sheet" is incorporated herein by reference. The information set forth in Section 11 ("Interests of Directors and Executive Officers; Transactions and Arrangements Concerning the Shares") of the Offer to Purchase is incorporated herein by reference.

Item 5.    Past Contacts, Transactions, Negotiations and Agreements.

        (e)    Agreements Involving the Subject Company's Securities:    The information set forth in Section 11 ("Interests of Directors and Executive Officers; Transactions and Arrangements Concerning the Shares") of the Offer to Purchase is incorporated herein by reference.

Item 6.    Purposes of the Transaction and Plans or Proposals.

        (a)    Purposes:    The information set forth in the section of the Offer to Purchase captioned "Summary Term Sheet" is incorporated herein by reference. The information set forth in Section 2 ("Purpose of the Offer; Certain Effects of the Offer") of the Offer to Purchase is incorporated herein by reference.

        (b)    Use of the Securities Acquired:    The information set forth in Section 2 ("Purpose of the Offer; Certain Effects of the Offer") of the Offer to Purchase is incorporated herein by reference.

        (c)    Plans:    The information set forth in Section 2 ("Purpose of the Offer; Certain Effects of the Offer") and Section 11 ("Interests of Directors and Executive Officers; Transactions and Arrangements Concerning the Shares") of the Offer to Purchase is incorporated herein by reference.

Item 7.    Source and Amount of Funds or Other Consideration.

        (a)    Source of Funds:    The information set forth in Section 9 ("Source and Amount of Funds") of the Offer to Purchase is incorporated herein by reference.

        (b)    Conditions:    The information set forth in Section 7 ("Conditions of the Offer") and Section 9 ("Source and Amount of Funds") of the Offer to Purchase is incorporated herein by reference.

Item 8.    Interest in Securities of the Subject Company.

        (a)    Securities Ownership:    The information set forth in Section 11 ("Interests of Directors and Executive Officers; Transactions and Arrangements Concerning the Shares") of the Offer to Purchase is incorporated herein by reference.

        (b)    Securities Transactions:    The information set forth in Section 11 ("Interests of Directors and Executive Officers; Transactions and Arrangements Concerning the Shares") of the Offer to Purchase is incorporated herein by reference.

Item 9.    Persons/Assets, Retained, Employed, Compensated or Used.

        (a)    Solicitations or Recommendations:    The information set forth in the section of the Offer to Purchase captioned "Summary Term Sheet" is incorporated herein by reference. The information set forth in Section 16 ("Fees and Expenses") of the Offer to Purchase is incorporated herein by reference.

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Item 10.    Financial Statements.

        Not applicable, in reliance on Instruction 2 to this Item 10.

Item 11.    Additional Information.

        The Company will amend this Schedule TO to include documents that the Company may file with the Securities and Exchange Commission (the "SEC") after the date of the Offer to Purchase pursuant to Sections 13(a), 13(c) or 14 of the Exchange Act and prior to the expiration of the Offer to the extent required by Rule 13e-4(d)(2) of the Exchange Act.

        (a)    Agreements, Regulatory Requirements and Legal Proceedings:    The information set forth in Section 2 ("Purpose of the Offer; Certain Effects of the Offer"), Section 10 ("Certain Information Concerning the Company"), Section 11 ("Interests of Directors and Executive Officers; Transactions and Arrangements Concerning the Shares") and Section 13 ("Certain Legal Matters; Regulatory Approvals") in the Offer to Purchase is incorporated herein by reference.

        (c)    Other Material Information:    The information in the Offer to Purchase and the Letter of Transmittal is incorporated herein by reference.

Item 12.    Exhibits.

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SIGNATURE

        After due inquiry and to the best of my knowledge and belief, I certify that the information set forth in this Schedule TO is true, complete and correct.

Date: May 15, 2015

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Index to Exhibits

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SCHEDULE TO

Item 1. Summary Term Sheet.
Item 2. Subject Company Information.
Item 3. Identity and Background of Filing Person.
Item 4. Terms of the Transaction.
Item 5. Past Contacts, Transactions, Negotiations and Agreements.
Item 6. Purposes of the Transaction and Plans or Proposals.
Item 7. Source and Amount of Funds or Other Consideration.
Item 8. Interest in Securities of the Subject Company.
Item 9. Persons/Assets, Retained, Employed, Compensated or Used.
Item 10. Financial Statements.
Item 11. Additional Information.
Item 12. Exhibits.

SIGNATURE
Index to Exhibits

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TABLE OF CONTENTS

Exhibit (a)(1)(A)

        Offer to Purchase for Cash
by
EMCORE Corporation
of
Up to $45,000,000 of Shares of Its Common Stock
at a Purchase Price Not Greater than $6.75 per Share
nor Less than $6.25 per Share

        EMCORE Corporation, a New Jersey corporation (the "Company," "EMCORE," "we," or "us"), invites its shareholders to tender shares of its common stock, no par value per share (the "Shares"), for purchase by EMCORE at a price not greater than $6.75 per Share nor less than $6.25 per Share, net to the seller in cash, less any applicable withholding taxes and without interest, upon the terms and subject to the conditions described in this offer to purchase (this "Offer to Purchase") and in the related letter of transmittal (the "Letter of Transmittal") (together, this Offer to Purchase and the Letter of Transmittal, as they may be amended or supplemented from time to time, constitute the "Offer").

        We are offering to purchase Shares in the Offer up to an aggregate purchase price of $45 million. Upon the terms and subject to the conditions of the Offer, we will determine a single per Share price that we will pay for Shares properly tendered and not properly withdrawn from the Offer, taking into account the total number of Shares properly tendered and the prices specified by tendering shareholders. We will select the lowest purchase price, not greater than $6.75 per Share nor less than $6.25 per Share, that will allow us to purchase Shares having an aggregate purchase price of $45 million, or a lower amount depending on the number of Shares properly tendered and not properly withdrawn (such purchase price, the "Final Purchase Price"). All Shares acquired in the Offer will be acquired at the Final Purchase Price, including those Shares tendered at a price lower than the Final Purchase Price. Only Shares properly tendered at prices at or below the Final Purchase Price, and not properly withdrawn, will be purchased. However, because of the "odd lot" priority, proration and conditional tender provisions described in this Offer to Purchase, we may not purchase all of the Shares tendered at or below the Final Purchase Price if, based on the Final Purchase Price, Shares having an aggregate purchase price in excess of $45 million are properly tendered and not properly withdrawn.

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At the maximum Final Purchase Price of $6.75 per Share, we could purchase 6,666,666 Shares if the Offer is fully subscribed, which would represent approximately 20.64% of the issued and outstanding Shares as of May 1, 2015.



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At the minimum Final Purchase Price of $6.25 per Share, we could purchase 7,200,000 Shares if the Offer is fully subscribed, which would represent approximately 22.29% of the issued and outstanding Shares as of May 1, 2015.



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If, based on the Final Purchase Price, Shares having an aggregate purchase price of less than $45 million are properly tendered and not properly withdrawn, we will buy all Shares properly tendered and not properly withdrawn.

        Shares not purchased in the Offer will be returned to the tendering shareholders at our expense promptly after the Expiration Time. We reserve the right, in our sole discretion, to change the per Share purchase price range and to increase or decrease the aggregate purchase price payable for Shares sought in the Offer, subject to applicable law. In accordance with the rules of the Securities and Exchange Commission (the "SEC"), we may increase the aggregate purchase price payable for Shares purchased in the Offer and thereby increase the number of Shares accepted for payment in the Offer

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by no more than 2% of the outstanding Shares without amending or extending the Offer. See Section 1.

        The Offer is not conditioned on obtaining financing or on any minimum number of Shares being tendered. The Offer is, however, subject to certain other conditions. See Section 7.

        The Shares are listed and traded on the NASDAQ Global Market (the "NASDAQ") under the symbol "EMKR." On May 5, 2015, the last full trading day prior to the announcement and commencement of the Offer, the last reported sale price of the Shares was $5.58 per Share. Shareholders are urged to obtain current market quotations for the Shares before deciding whether and at what purchase price or purchase prices to tender their Shares. See Section 8.

        Our board of directors (the "Board of Directors") has approved the Offer. However, neither we nor any member of our Board of Directors; B. Riley & Co., LLC, the dealer manager for the Offer (the "Dealer Manager"); MacKenzie Partners, Inc., the information agent for the Offer (the "Information Agent"); or American Stock Transfer & Trust Company, LLC, the depositary for the Offer (the "Depositary") makes any recommendation to you as to whether you should tender or refrain from tendering your Shares or as to the purchase price or purchase prices at which you may choose to tender your Shares. Neither we nor any member of our Board of Directors, the Dealer Manager, the Information Agent or the Depositary has authorized any person to make any recommendation with respect to the Offer. You must make your own decision as to whether to tender your Shares and, if so, how many Shares to tender and the purchase price or purchase prices at which you will tender them. In doing so, you should consult your financial and tax advisors, and read carefully and evaluate the information in this Offer to Purchase and in the Letter of Transmittal, including our reasons for making the Offer. See Section 2.

        Our directors and executive officers are entitled to participate in the Offer on the same basis as all other shareholders. Mr. Becker has informed us that Becker Drapkin Management, L.P. intends to tender an amount of Shares during the Offer that will result in its percentage ownership of the Company following the Expiration Date of the Offer remaining substantially equivalent to its percentage ownership of the Company immediately preceding the Offer. Mr. Bogomolny and Mr. Domenik have informed the Company that they each intend to tender a portion of the Shares beneficially owned by them. Our remaining directors and executive officers have advised us that they do not currently intend to tender Shares in the Offer. The equity ownership of our directors, executive officers and affiliates who do not tender their Shares in the Offer will proportionately increase as a percentage of our outstanding common stock following the consummation of the Offer. See Section 11.

        Neither the U.S. Securities and Exchange Commission, any state securities commission, nor any other regulatory body has approved or disapproved of this transaction or passed upon the merits or fairness of such transaction or passed upon the adequacy or accuracy of the information contained in this Offer. Any representation to the contrary is a criminal offense.

        If you have questions or need assistance, you should contact the Information Agent or the Dealer Manager at their respective addresses and telephone numbers set forth on the back cover of this Offer to Purchase. If you require additional copies of this Offer to Purchase, the Letter of Transmittal or other related materials, you should contact the Information Agent.

The Dealer Manager for the Offer is:

May 15, 2015

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IMPORTANT

        If you want to tender all or a portion of your Shares, you must do one of the following before the Offer expires at 5:00 P.M., New York City time, on Monday, June 15, 2015 (unless the Offer is extended):

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If your Shares are registered in the name of a broker, dealer, commercial bank, trust company or other nominee, contact the nominee and request that the nominee tender your Shares for you.



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If you hold certificates registered in your own name, complete and sign a Letter of Transmittal according to its instructions, and deliver it, together with any required signature guarantees, the certificates for your Shares and any other documents required by the Letter of Transmittal, to American Stock Transfer & Trust Company, LLC, the Depositary for the Offer.



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If you are an institution participating in The Depository Trust Company, which we call the "Book-Entry Transfer Facility" in this Offer to Purchase, tender your Shares according to the procedure for book-entry transfer described in Section 3.



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If you are a holder of vested options, you may exercise your vested options and tender any of the Shares issued upon exercise. You must exercise your options sufficiently in advance of the Expiration Time in order to have time for such exercise to settle before the Shares received upon exercise of the options may be tendered. An exercise of an option cannot be revoked even if Shares received upon the exercise thereof and tendered in the Offer are not purchased in the Offer for any reason.



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If you are a holder of vested restricted stock awards or units and the underlying Shares are issued to you prior to the Expiration time, you may tender those Shares in the Offer, subject to the terms and conditions of the Offer.

        If you want to tender your Shares but your certificates for the Shares are not immediately available, or cannot be delivered to the Depositary within the required time, or you cannot comply with the procedure for book-entry transfer on a timely basis, or your other required documents cannot be delivered to the Depositary prior to the Expiration Date, you may still tender your Shares if you comply with the guaranteed delivery procedure described in Section 3.

        If you wish to maximize the chance that your Shares will be purchased in the Offer, you should check the box in the section of the Letter of Transmittal captioned "Shares Tendered At Price Determined Under The Offer." If you agree to accept the purchase price determined in the Offer, your Shares will be deemed to be tendered at the minimum price of $6.25 per Share. You should understand that this election may lower the Final Purchase Price and could result in your Shares being purchased at the minimum price of $6.25 per Share.

        We are not making the Offer to, and will not accept any tendered Shares from, shareholders in any jurisdiction within the United States where it would be illegal to do so. However, we may, at our discretion, take any actions necessary for us to make the Offer to shareholders in any such jurisdiction.

        You may contact the Information Agent, the Dealer Manager or your broker, dealer, commercial bank, trust company or other nominee for assistance. The contact information for the Information Agent and the Dealer Manager is set forth on the back cover of this Offer to Purchase.

        We have not authorized any person to give any information or to make any representation in connection with the Offer other than those contained in this Offer to Purchase or in the Letter of Transmittal. You should not rely on any recommendation, or any such representation or information, as having been authorized by us, any member of our Board of Directors, the Dealer Manager, the Information Agent or the Depositary.

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TABLE OF CONTENTS

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SUMMARY TERM SHEET

        We are providing this summary for your convenience. It highlights certain material information in this Offer to Purchase, but it does not describe all of the details of the Offer to the same extent described elsewhere in this Offer to Purchase. We urge you to read the entire Offer to Purchase and the Letter of Transmittal because they contain the full details of the Offer. We have included references to the sections of this Offer to Purchase where you will find a more complete discussion.

Who is offering to purchase my Shares?

        The issuer of the Shares, EMCORE Corporation, a New Jersey corporation (the "Company," "EMCORE," "we," or "us"), is offering to purchase the Shares. See Section 1.

What is EMCORE offering to purchase?

        We are offering to purchase Shares up to an aggregate purchase price of $45 million. See Section 1.

What is the purpose of the Offer?

        We believe that the Offer is a prudent use of our financial resources, and provides an efficient way of returning capital to shareholders while providing long-term shareholder value. In particular, the Board of Directors has determined that the all-cash Offer is an effective method for the Company to return to our shareholders a significant portion of the proceeds from the recent sale of our Photovoltaics business to SolAero Technologies Corp. (f/k/a Photon Acquisition Corporation), as well as the recent sale of our Digital Products business to NeoPhotonics Corporation.

        Our Board of Directors considered various factors and information before approving the Offer, including, without limitation, other possible methods of repurchasing the Shares, including in the open market or through a fixed price tender offer for the Shares, recent trends in the market regarding modified "Dutch auction" tender offers, trends in the equity market generally, shareholder input, and historical trading performance of our Shares, of the stock of comparable public companies and of related market indices.

        We believe that the modified "Dutch auction" tender offer set forth in this Offer to Purchase represents a mechanism to provide our shareholders with the opportunity to tender all or a portion of their Shares and thereby receive a return of some or all of their investment if they so elect. We believe that the Offer provides shareholders (particularly those who, because of the size of their shareholdings, might not be able to sell their Shares without potential disruption to the Share price) with an opportunity to obtain liquidity with respect to all or a portion of their Shares without potential disruption to the Share price. In addition, if we complete the Offer, shareholders who do not participate in the Offer will automatically increase their relative percentage ownership interest in the Company and our future operations at no additional cost to them. See Section 2.

        The Offer also provides our shareholders with an efficient way to sell their Shares without incurring broker's fees or commissions associated with open market sales. However, shareholders who hold Shares through nominees are urged to consult their nominees to determine whether transaction costs may apply if shareholders tender Shares through the nominees and not directly to the Depositary. Furthermore, "odd lot holders" who hold Shares registered in their names and tender their Shares directly to the Depositary and whose Shares are purchased in the Offer will avoid any applicable odd lot discounts that might otherwise be payable on sales of their Shares. See Section 1 and Section 2.

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How many Shares will EMCORE purchase in the Offer?

        We will purchase Shares in the Offer up to an aggregate purchase price of $45 million or a lower aggregate purchase price depending on the number of Shares properly tendered and not properly withdrawn.

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At the maximum Final Purchase Price of $6.75 per Share, we could purchase 6,666,666 Shares if the Offer is fully subscribed, which would represent approximately 20.64% of the issued and outstanding Shares as of May 1, 2015.



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At the minimum Final Purchase Price of $6.25 per Share, we could purchase 7,200,000 Shares if the Offer is fully subscribed, which would represent approximately 22.29% of the issued and outstanding Shares as of May 1, 2015.



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If, based on the Final Purchase Price, Shares having an aggregate purchase price of less than $45 million are properly tendered and not properly withdrawn, we will buy all Shares properly tendered and not properly withdrawn.

        If, based on the Final Purchase Price, Shares having an aggregate purchase price of more than $45 million are properly tendered and not properly withdrawn, we will purchase all Shares tendered at or below the Final Purchase Price on a pro rata basis, except for "odd lots" (of less than 100 Shares), which we will purchase on a priority basis. We expressly reserve the right to purchase additional Shares in the Offer, subject to applicable law. See Section 1. The Offer is not conditioned on any minimum number of Shares being tendered but is subject to certain other conditions. See Section 7.

        In accordance with the rules of the SEC, we may increase the aggregate purchase price payable for Shares purchased in the Offer and thereby increase the number of Shares accepted for payment in the Offer by no more than 2% of the outstanding Shares without amending or extending the Offer. See Section 1.

What will the purchase price for the Shares be and what will be the form of payment?

        We are conducting the Offer through a procedure commonly called a modified "Dutch auction," which allows you to select the price (in increments of $0.10), within a price range specified by us, at which you are willing to sell your Shares. The price range for the Offer is $6.25 to $6.75 per Share. We will select the lowest purchase price, not greater than $6.75 per Share nor less than $6.25 per Share, that will allow us to purchase Shares having an aggregate purchase price of $45 million, based on the number of Shares properly tendered, or, if fewer Shares are properly tendered, all Shares that are properly tendered and not properly withdrawn. We will purchase all Shares properly tendered and not properly withdrawn from the Offer at the Final Purchase Price, even if you have selected a purchase price lower than the Final Purchase Price, but we will not purchase any Shares tendered at a price above the Final Purchase Price.

        If you wish to maximize the chance that we will purchase your Shares, you should check the box in the section captioned "Shares Tendered At Price Determined Under The Offer" in the section of the Letter of Transmittal captioned "Price (In Dollars) Per Share At Which Shares Are Being Tendered," indicating that you will accept the Final Purchase Price. You should understand that this election may have the effect of lowering the Final Purchase Price and could result in your Shares being purchased at the minimum price of $6.25 per Share.

        If we purchase your Shares in the Offer, we will pay you the Final Purchase Price in cash, less any applicable withholding taxes and without interest, promptly after the Expiration Time. Under no circumstances will we pay interest on the Final Purchase Price, even if there is a delay in making payment. See the Introduction, Section 1, Section 3 and Section 5.

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How will EMCORE pay for the Shares?

        The maximum aggregate purchase price of Shares purchased in the Offer will be $45 million. We expect the maximum aggregate cost of this purchase, including all fees and expenses applicable to the Offer, to be approximately $800,000. We will use cash on hand to purchase Shares in the Offer and to pay all related fees and expenses. See Section 9.

How long do I have to tender my Shares?

        You may tender your Shares until the Offer expires. The Offer will expire on Monday, June 15, 2015, at 5:00 P.M. New York City time, unless we extend the Offer. See Section 1. We may choose to extend the Offer at any time and for any reason. We cannot assure you, however, that we will extend the Offer or, if we extend it, for how long. See Section 1 and Section 15. If a broker, dealer, commercial bank, trust company or other nominee holds your Shares, it may have an earlier deadline for accepting the Offer and we urge you to contact your broker, dealer, commercial bank, trust company or other nominee to find out its deadline. See Section 3.

Can the Offer be extended, amended or terminated, and if so, under what circumstances?

        Yes. We can extend or amend the Offer in our sole discretion. If we extend the Offer, we may delay the acceptance of any Shares that have been tendered. See Section 15. We can terminate the Offer under certain circumstances. See Section 7.

How will I be notified if EMCORE extends the Offer or amends the terms of the Offer?

        If we extend the Offer, we will issue a press release not later than 9:00 a.m., New York City time, on the first business day after the previously scheduled Expiration Time. We will announce any amendment to the Offer by making a public announcement of the amendment. See Section 15.

Are there any conditions to the Offer?

        Yes. Our obligation to accept for payment and pay for your tendered Shares depends upon a number of conditions that must be satisfied or waived on or prior to the Expiration Time, including:

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no legal action shall have been threatened, pending or taken that could reasonably be expected to adversely affect the Offer;



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no legislation amending the Internal Revenue Code of 1986, as amended (the "Code"), shall have passed either the United States House of Representatives or the Senate or otherwise is pending before the United States House of Representatives or the Senate or any committee thereof, the effect of which would be to change the United States federal income tax consequences of the consummation of the Offer in any manner that would adversely affect us or any of our affiliates;



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our ability to use any portion of our net operating losses in future tax years due to the potential application of Section 382 of the Code shall not, in our reasonable judgment, be jeopardized by the consummation of the Offer;



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no general suspension of trading in, or general limitation on prices for, securities on any national securities exchange or in the over-the-counter markets in the United States or the declaration of a banking moratorium or any suspension of payments in respect of banks in the United States shall have occurred;



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no decrease of more than 10% in the market price of the Shares or in the general level of market prices for equity securities in the New York Stock Exchange Composite Index, the Dow Jones Industrial Average, the NASDAQ Global Market Composite Index or Standard & Poor's

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Composite Index of 500 Industrial Companies measured from the close of trading on May 14, 2015, the last trading day prior to commencement of the Offer, shall have occurred;

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no commencement of a war, armed hostilities or other similar national or international calamity, including, without limitation, an act of terrorism, directly or indirectly involving the United States shall have occurred on or after May 14, 2015 nor shall any material escalation of any war or armed hostilities which had commenced prior to May 14, 2015 have occurred;



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no changes in the general political, market, economic or financial conditions, domestically or internationally, that could reasonably be expected to materially and adversely affect our business or the trading in the Shares shall have occurred;



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no person shall have proposed, announced or made a tender or exchange offer for the Shares (other than the Offer), or a merger, business combination or other similar transaction involving us;



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no person (including a group) shall have acquired, or proposed to acquire, beneficial ownership of more than 5% of the outstanding Shares (other than as publicly disclosed in a filing with the SEC on or before May 14, 2015) nor shall any new group have been formed that beneficially owns more than 5% of the outstanding Shares;



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no person (including a group) that has publicly disclosed in a filing with the SEC on or before May 14, 2015 that it has beneficial ownership of 5% of the outstanding Shares shall have acquired, or publicly announced its proposal to acquire, beneficial ownership of any percentage greater than 5% of the outstanding Shares;



•

no person shall have filed a Notification and Report Form under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, or made a public announcement reflecting an intent to acquire us or any of our subsidiaries or any of our assets or securities;



•

no material adverse change in our business, condition (financial or otherwise), properties, assets, income, operations or prospects shall have occurred during the Offer; and



•

we shall not have determined that as a result of the consummation of the Offer and the purchase of Shares, there will be a reasonable likelihood that the Shares either (1) will be held of record by fewer than 300 persons or (2) will be delisted from the NASDAQ or be eligible for deregistration under the Securities Exchange Act of 1934, as amended (the "Exchange Act").

        For a more detailed discussion of these and other conditions of the Offer, please see Section 7.

How do I tender my Shares?

        If you want to tender all or a portion of your Shares, you must do one of the following before 5:00 P.M., New York City time, on Monday, June 15, 2015, or any later time and date to which the Offer may be extended:

•

If your Shares are registered in the name of a broker, dealer, commercial bank, trust company or other nominee, contact the nominee and request that the nominee tender your Shares for you.



•

If you hold certificates registered in your own name, complete and sign a Letter of Transmittal according to its instructions, and deliver it, together with any required signature guarantees, the certificates for your Shares and any other documents required by the Letter of Transmittal, to the Depositary at one of its addresses appearing on the back cover page of this Offer to Purchase.

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•

If you are an institution participating in the Book-Entry Transfer Facility, tender your Shares according to the procedure for book-entry transfer described in Section 3.



•

If you are a holder of vested options, you may exercise your vested options and tender any Shares issued upon such exercise. You must exercise your options sufficiently in advance of the Expiration Time in order to have time for such exercise to settle before the Shares received upon exercise of the options may be tendered. An exercise of an option cannot be revoked even if Shares received upon the exercise thereof and tendered in the Offer are not purchased in the Offer for any reason.



•

If you are a holder of vested restricted stock awards or units and the underlying Shares are issued to you prior to the Expiration time, you may tender those Shares in the Offer, subject to the terms and conditions of the Offer.

        We are not making the Offer to, and will not accept any tendered Shares from, shareholders in any jurisdiction within the United States where it would be illegal to do so. However, we may, at our discretion, take any actions necessary for us to make the Offer to shareholders in any such jurisdiction.

        If you want to tender your Shares but your certificates for the Shares are not immediately available, or cannot be delivered to the Depositary within the required time, or you cannot comply with the procedure for book-entry transfer on a timely basis, or your other required documents cannot be delivered to the Depositary prior to the Expiration Date, you may still tender your Shares if you comply with the guaranteed delivery procedure described in Section 3.

        You may contact the Information Agent, the Dealer Manager or your broker, dealer, commercial bank, trust company or other nominee for assistance. The contact information for the Information Agent and the Dealer Manager is set forth on the back cover of this Offer to Purchase. See Section 3 and the instructions to the Letter of Transmittal.

Once I have tendered Shares in the Offer, may I withdraw my tendered Shares?

        Yes. You may withdraw any Shares you have tendered at any time before 5:00 P.M., New York City time, on Monday, June 15, 2015, unless we extend the Offer, in which case you may withdraw your Shares until the Expiration Time, as extended. If we have not accepted for payment the Shares you have tendered to us, you may also withdraw your Shares at any time after 5:00 P.M., New York City time, on Tuesday, July 14, 2015. See Section 4.

How do I withdraw Shares I previously tendered?

        To properly withdraw Shares previously tendered, you must deliver on a timely basis a written notice of your withdrawal to the Depositary at one of its addresses appearing on the back cover of this Offer to Purchase. Your notice of withdrawal must specify your name, the number of Shares to be withdrawn and the name of the registered holder of the Shares. Some additional requirements apply if the certificates for Shares to be withdrawn have been delivered to the Depositary or if your Shares have been tendered under the procedure for book-entry transfer set forth in Section 3. See Section 4.

In what order will you purchase the tendered Shares?

        We will purchase Shares on the following basis:

•

first, we will purchase all Shares properly tendered at or below the Final Purchase Price by any odd lot holder (holders of "odd lots" of less than 100 Shares);



•

second, after the purchase of all of the Shares properly tendered at or below the Final Purchase Price and not properly withdrawn by odd lot holders, we will purchase all other Shares properly tendered at or below the Final Purchase Price on a pro rata basis (excluding Shares subject to

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conditional tenders for which the condition was not initially satisfied) with appropriate adjustment to avoid purchases of fractional Shares; and

•

third, only if necessary to permit us to purchase Shares having an aggregate purchase price of $45 million (or such greater aggregate purchase price as we may elect, subject to applicable law), we will purchase Shares conditionally tendered (for which the condition was not initially satisfied) at or below the Final Purchase Price and not properly withdrawn, by random lot, to the extent feasible. To be eligible for their Shares to be purchased by random lot, shareholders whose Shares are conditionally tendered must have tendered all of their Shares.

        Therefore, it is possible that we will not purchase all of the Shares that you tender even if you tender them at or below the Final Purchase Price. See Section 1.

What does the Board of Directors think of the Offer?

        Our Board of Directors has approved the Offer. However, neither we nor any member of our Board of Directors, the Dealer Manager, the Depositary or the Information Agent makes any recommendation to you as to whether you should tender or refrain from tendering your Shares or as to the purchase price or purchase prices at which you may choose to tender your Shares. You must make your own decision as to whether to tender your Shares and, if so, how many Shares to tender and the purchase price or purchase prices at which you will tender them. In doing so, you should read carefully the information in this Offer to Purchase and in the Letter of Transmittal, including our reasons for making the Offer. See Section 2. You should discuss whether to tender your Shares with your broker or other financial or tax advisors.

Will EMCORE's directors, executive officers and affiliates tender Shares in the Offer?

        Our directors and executive officers are entitled to participate in the Offer on the same basis as all other shareholders. Mr. Becker has informed us that Becker Drapkin Management, L.P. intends to tender an amount of Shares during the Offer that will result in its percentage ownership of the Company following the Expiration Date of the Offer remaining substantially equivalent to its percentage ownership of the Company immediately preceding the Offer. Mr. Bogomolny and Mr. Domenik have informed the Company that they each intend to tender a portion of the Shares beneficially owned by them. Our remaining directors and executive officers have advised us that they do not currently intend to tender Shares in the Offer. The equity ownership of our directors, executive officers and affiliates who do not tender their Shares in the Offer will proportionately increase as a percentage of our outstanding common stock following the consummation of the Offer. See Section 11.

If I decide not to tender, how will the Offer affect my Shares?

        Shareholders who decide not to tender their Shares will own a greater percentage interest in the outstanding Shares following the consummation of the Offer. See Section 2.

Following the Offer, will EMCORE continue as a public company?

        Yes. We believe that the Shares will continue to be authorized for trading on the NASDAQ and that we will continue to be subject to the reporting requirements of the Exchange Act. See Section 2.

When and how will EMCORE pay me for the Shares I tender?

        We will pay the Final Purchase Price net to the seller, in cash, less applicable withholding taxes and without interest, for the Shares we purchase promptly after the Expiration Time. We will announce the preliminary results of the Offer, including price and preliminary information about any expected proration, on the business day following the Expiration Time. Promptly after determining the final

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results of any proration or the Final Purchase Price, we will announce the Final Purchase Price and begin paying for tendered Shares. We will pay for the Shares accepted for purchase by depositing the aggregate purchase price with the Depositary, promptly thereafter. The Depositary will act as your agent and will transmit to you the payment for all of your Shares accepted for payment. See Section 1 and Section 5.

If I am a holder of vested stock options, how do I participate in the Offer?

        If you are a holder of vested stock options, you may exercise your vested options and tender any Shares issued upon such exercise. You must exercise your options sufficiently in advance of the Expiration Time in order to have time for such exercise to settle before the Shares received upon exercise of the options may be tendered. An exercise of an option cannot be revoked even if Shares received upon the exercise thereof and tendered in the Offer are not purchased in the Offer for any reason.

        Restricted stock awards and restricted stock units cannot be tendered in the Offer. To the extent that your restricted stock awards or units vest and the underlying Shares are issued to you prior to the Expiration Time, you will be entitled to tender those Shares in the Offer, subject to the terms and conditions of the Offer.

        Shares that you acquired under our 401(k) Plan, Employee Stock Purchase Plan and Officer and Director Share Purchase Plan may be tendered in the Offer, subject to the terms and conditions of the applicable plan and subject to the terms and conditions of the Offer. See the Introduction and Section 3.

What is the recent market price of my Shares?

        On May 5, 2015, the last full trading day before the announcement and commencement of the Offer, the last reported sale price of the Shares on the NASDAQ was $5.58 per Share. You are urged to obtain current market quotations for the Shares before deciding whether and at what purchase price or purchase prices to tender your Shares. See Section 8.

Will I have to pay brokerage commissions if I tender my Shares?

        If you are a registered shareholder and you tender your Shares directly to the Depositary, you will not incur any brokerage commissions. If you hold Shares through a broker, dealer, commercial bank, trust company or other nominee, we urge you to consult your broker, dealer, commercial bank, trust company or other nominee to determine whether any transaction costs will apply. See Section 3 and Section 16.

Will I have to pay stock transfer tax if I tender my Shares?

        If you instruct the Depositary in the Letter of Transmittal to make the payment for the Shares to the registered holder, you will not incur any stock transfer tax. See Section 5.

What are the United States federal income tax consequences if I tender my Shares?

        Generally, if you are a U.S. Holder (as defined in Section 14), your receipt of cash from us in exchange for the Shares you tender will be a taxable transaction for United States federal income tax purposes. The cash you receive for your tendered Shares will generally be treated for United States federal income tax purposes either as consideration received in respect of a sale or exchange of the Shares purchased by us or as a distribution from us in respect of Shares. Non-U.S. Holders (as defined in Section 14) may be subject to income or withholding taxes upon the disposition of Shares pursuant to the Offer. The Depositary will withhold 30% of the gross proceeds payable to a Non-U.S. Holder

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unless the holder provides the Depositary with (i) a properly executed IRS Form W-8BEN (or other applicable Form W-8) certifying that it is entitled to a reduced rate of withholding under an applicable treaty or (ii) a properly executed IRS Form W-8ECI certifying that it is exempt from withholding because the payment is effectively connected with Non-U.S. Holder's conduct of a trade or business in the United States. Non-U.S. Holders may be eligible for a refund of amounts withheld to the extent consideration received is in respect of a sale or exchange of Shares or is otherwise not subject to withholding tax. Please see Section 14 for a more detailed summary on the tax treatment of the Offer to U.S. and Non-U.S. Holders. As described in Section 14, the number of Shares that we will purchase from a shareholder pursuant to the Offer may affect the United States federal income tax consequences to the shareholder of the purchase, and therefore, will be relevant to a shareholder's decision whether to tender Shares. Accordingly, all shareholders are urged to consult their tax advisors regarding the United States federal income tax consequences of participating in the Offer.

Who should I contact with questions about the Offer?

        The Information Agent and the Dealer Manager can help answer your questions. The Information Agent is MacKenzie Partners, Inc. and the Dealer Manager is B. Riley & Co., LLC. Their contact information is set forth on the back cover of this Offer to Purchase.

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FORWARD-LOOKING STATEMENTS

        This Offer to Purchase contains certain "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended (the "Securities Act") and Section 21E of the Securities and Exchange Act of 1934, as amended (the "Exchange Act"). These forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are largely based on our current expectations and projections about future events and financial trends affecting the financial condition of our business. Such forward-looking statements include, in particular, projections about our future results included in our Exchange Act reports, statements about our plans, strategies, business prospects, changes and trends in our business and the markets in which we operate. These forward-looking statements may be identified by the use of terms and phrases such as "anticipates," "believes," "can," "could," "estimates," "expects," "forecasts," "intends," "may," "plans," "projects," "should," "targets," "will," "would," and similar expressions or variations of these terms and similar phrases. Additionally, statements concerning future matters such as our expected liquidity, development of new products, enhancements or technologies, sales levels, expense levels, the ability of the Company to commence and complete the tender offer, the price at which the Company purchases common stock pursuant to the tender offer or otherwise, the number of shares it is able to purchase pursuant to the tender offer or otherwise, the ability of the Company to achieve the benefits contemplated by the tender offer and other statements regarding matters that are not historical are forward-looking statements. Management cautions that these forward-looking statements relate to future events or our future financial performance and are subject to business, economic, and other risks and uncertainties, both known and unknown, that may cause actual results, levels of activity, performance, or achievements of our business or our industry to be materially different from those expressed or implied by any forward-looking statements. Factors that could cause or contribute to such differences in results and outcomes include without limitation those discussed under Item 1A—Risk Factors in our Annual Report on Form 10-K for the fiscal year ended September 30, 2014, as updated by our subsequent periodic reports. These cautionary statements apply to all forward-looking statements wherever they appear in this Offer to Purchase.

        Forward-looking statements are based on certain assumptions and analysis made in light of our experience and perception of historical trends, current conditions and expected future developments as well as other factors that we believe are appropriate under the circumstances. While these statements represent our judgment on what the future may hold, and we believe these judgments are reasonable, these statements are not guarantees of any events or financial results. All forward-looking statements in this Offer to Purchase are made as of the date hereof, based on information available to us as of the date hereof, and subsequent facts or circumstances may contradict, obviate, undermine, or otherwise fail to support or substantiate such statements. We caution you not to rely on these statements without also considering the risks and uncertainties associated with these statements and our business that are addressed in this Offer to Purchase. Certain information included in this Offer to Purchase may supersede or supplement forward-looking statements in our other reports filed with the Securities and Exchange Commission. We assume no obligation to update any forward-looking statement to conform such statements to actual results or to changes in our expectations, except as required by applicable law or regulation.

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INTRODUCTION

To the holders of our common stock:

        We invite our shareholders to tender shares of our common stock, no par value per share, for purchase by us at a price not greater than $6.75 per Share nor less than $6.25 per Share, net to the seller in cash, less any applicable withholding taxes and without interest, upon the terms and subject to the conditions described in this Offer to Purchase and in the related Letter of Transmittal, which together, as they may be amended or supplemented from time to time, constitute the Offer.

        The Offer will expire on Monday, June 15, 2015, at 5:00 p.m., New York City time, unless the Offer is extended or withdrawn (such date, as it may be extended, the "Expiration Date.")

        We are offering to purchase Shares in the Offer up to an aggregate purchase price of $45 million. Upon the terms and subject to the conditions of the Offer, we will determine a single per Share price that we will pay for Shares properly tendered and not properly withdrawn from the Offer, taking into account the total number of Shares properly tendered and the prices specified by tendering shareholders. We will select the lowest purchase price, not greater than $6.75 per Share nor less than $6.25 per Share, that will allow us to purchase Shares having an aggregate purchase price of $45 million, or a lower aggregate purchase price depending on the number of Shares properly tendered and not properly withdrawn. We refer to the price we will select as the Final Purchase Price. We will acquire all Shares properly tendered and not properly withdrawn from the Offer at the Final Purchase Price, on the terms and subject to the conditions of the Offer, including proration provisions.

        We will only purchase Shares properly tendered at prices at or below the Final Purchase Price and not properly withdrawn. However, because of the odd lot priority, proration (if Shares having an aggregate purchase price greater than the aggregate purchase price we seek are properly tendered and not properly withdrawn) and conditional tender provisions described in this Offer to Purchase, we may not purchase all of the Shares tendered at or below the Final Purchase Price. If, based on the Final Purchase Price, Shares having an aggregate purchase price of less than $45 million are properly tendered and not properly withdrawn, we will buy all Shares properly tendered and not properly withdrawn. Shares not purchased in the Offer, including Shares tendered at prices in excess of the Final Purchase Price and Shares not purchased because of proration or conditional tenders, will be returned to the tendering shareholders at our expense promptly after the Expiration Time. See Section 1.

        We expressly reserve the right, in our sole discretion, to change the per Share purchase price range and to increase or decrease the aggregate purchase price payable for Shares sought in the Offer. We may increase the aggregate purchase price of Shares sought in the Offer to an amount greater than $45,000,000, subject to applicable law. See Section 1.

        If you are a holder of vested options, you may exercise your vested options and tender any of the Shares issued upon exercise. You must exercise your options sufficiently in advance of the Expiration Time in order to have time for such exercise to settle before the Shares received upon exercise of the options may be tendered. An exercise of an option cannot be revoked even if Shares received upon the exercise thereof and tendered in the Offer are not purchased in the Offer for any reason. See Section 3.

        If you want to tender your Shares but your certificates for the Shares are not immediately available, or cannot be delivered to the Depositary within the required time, or you cannot comply with the procedure for book-entry transfer on a timely basis, or your other required documents cannot be delivered to the Depositary prior to the Expiration Date, you may still tender your Shares if you comply with the guaranteed delivery procedure described in Section 3.

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        The Offer is not conditioned on any minimum number of Shares being tendered. The Offer is, however, subject to certain other conditions. See Section 7.

        The Board of Directors has approved the Offer. However, neither we nor any member of our Board of Directors, the Dealer Manager, the Information Agent or the Depositary makes any recommendation to you as to whether you should tender or refrain from tendering your Shares or as to the purchase price or purchase prices at which you may choose to tender your Shares. Neither we nor any member of our Board of Directors, the Dealer Manager, the Information Agent or the Depositary has authorized any person to make any recommendation with respect to the Offer. You must make your own decision as to whether to tender your Shares and, if so, how many Shares to tender and the purchase price or purchase prices at which you will tender them. In doing so, you should consult your financial and tax advisors, and read carefully and evaluate the information in this Offer to Purchase and in the Letter of Transmittal, including our reasons for making the Offer.

        Our directors and executive officers are entitled to participate in the Offer on the same basis as all other shareholders. Mr. Becker has informed us that Becker Drapkin Management, L.P. intends to tender an amount of Shares during the Offer that will result in its percentage ownership of the Company following the Expiration Date of the Offer remaining substantially equivalent to its percentage ownership of the Company immediately preceding the Offer. Mr. Bogomolny and Mr. Domenik have informed the Company that they each intend to tender a portion of the Shares beneficially owned by them. Our remaining directors and executive officers have advised us that they do not currently intend to tender Shares in the Offer. The equity ownership of our directors, executive officers and affiliates who do not tender their Shares in the Offer will proportionately increase as a percentage of our outstanding common stock following the consummation of the Offer. See Section 11.

        We will pay all fees and expenses incurred in connection with the Offer by the Dealer Manager, the Information Agent and the Depositary. See Section 16.

        As of May 1, 2015, we had 32,296,486 issued and outstanding Shares, excluding 39,795 Shares held in treasury. As of that date, there were, in the aggregate, 1,765,982 Shares available for grant or award under our equity compensation plans. We also had 1,066,591 Shares subject to outstanding options and 592,420 restricted stock units ("RSUs") outstanding under the plans.

•

At the maximum Final Purchase Price of $6.75 per Share, we could purchase 6,666,666 Shares if the Offer is fully subscribed, which would represent approximately 20.64% of the issued and outstanding Shares as of May 1, 2015.



•

At the minimum Final Purchase Price of $6.25 per Share, we could purchase 7,200,000 Shares if the Offer is fully subscribed, which would represent approximately 22.29% of the issued and outstanding Shares as of May 1, 2015.

        The Shares are listed and traded on the NASDAQ under the symbol "EMKR." On May 5, 2015, the last full trading day prior to the announcement and commencement of the Offer, the last reported sale price of the Shares was $5.58 per Share. Shareholders are urged to obtain current market quotations for the Shares before deciding whether and at what purchase price or purchase prices to tender their Shares. See Section 8 and Section 11.

        Our principal executive offices are located at 2015 W. Chestnut Street, Alhambra California 91803 and our phone number is (626) 293-3400.

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THE OFFER

1.  Number of Shares; Proration.

        Upon the terms and subject to the conditions of the Offer, we will purchase Shares up to an aggregate purchase price of $45 million, or a lower aggregate purchase price depending on the number of Shares properly tendered and not properly withdrawn in accordance with Section 4 before the Expiration Time, at a price not greater than $6.75 per Share nor less than $6.25 per Share, net to the seller in cash, less any applicable withholding taxes and without interest. We refer to such purchase price as the Final Purchase Price. If, based on the Final Purchase Price, Shares having an aggregate purchase price of less than $45 million are properly tendered and not properly withdrawn, we will buy all Shares properly tendered and not properly withdrawn.

        The term "Expiration Time" or "Expiration Date" means 5:00 P.M., New York City time, on Monday, June 15, 2015, unless and until we, in our sole discretion, shall have extended the period of time during which the Offer will remain open, in which event the term "Expiration Time" or "Expiration Date" shall refer to the latest time and date at which the Offer, as so extended by us, shall expire. See Section 15 for a description of our right to extend, delay, terminate or amend the Offer.

        In accordance with Instruction 5 of the Letter of Transmittal, shareholders desiring to tender Shares must either:

1.

specify that they are willing to sell their Shares to us at the Final Purchase Price (which could result in the tendering shareholder receiving a purchase price per Share as low as $6.25), or



2.

specify the price or prices, not greater than $6.75 per Share nor less than $6.25 per Share, at which they are willing to sell their Shares to us under the Offer. Prices may be specified in increments of $0.10.

        Promptly following the Expiration Time, we will determine the Final Purchase Price that we will pay for Shares properly tendered and not properly withdrawn, taking into account the number of Shares tendered and the prices specified by tendering shareholders. We will select the lowest purchase price, not greater than $6.75 per Share nor less than $6.25 per Share, that will allow us to purchase Shares having an aggregate purchase price of $45 million, or a lower aggregate purchase price depending on the number of Shares properly tendered and not properly withdrawn. All Shares tendered in the Offer and accepted for purchase by us will be purchased at the Final Purchase Price.

        If you agree to accept the purchase price determined in the Offer, your Shares will be deemed to be tendered at the minimum price of $6.25 per Share for purposes of determining the Final Purchase Price. You should understand that this election may effectively lower the Final Purchase Price and could result in your Shares being purchased at the minimum price of $6.25 per Share.

        We will announce the preliminary results of the Offer, including price and preliminary information about any expected proration, on the business day following the Expiration Time. Promptly after determining the final results of any proration or the Final Purchase Price, we will announce the Final Purchase Price and begin paying for tendered Shares. We will only purchase Shares properly tendered at prices at or below the Final Purchase Price and not properly withdrawn. However, because of the odd lot priority, proration and conditional tender provisions of the Offer, we may not purchase all of the Shares tendered at or below the Final Purchase Price if, based on the Final Purchase Price, Shares having an aggregate purchase price of more than $45 million are properly tendered and not properly withdrawn. We will return all Shares tendered and not purchased pursuant to the Offer, including Shares tendered at prices in excess of the Final Purchase Price and Shares not purchased because of proration or conditional tenders, to the tendering shareholders at our expense, promptly following the Expiration Time.

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        By following the instructions to the Letter of Transmittal, shareholders can specify different minimum prices for specified portions of their Shares, but a separate Letter of Transmittal must be submitted for Shares tendered at each price. Shareholders can also specify the order in which the specified portions of their Shares will be purchased in the event that, as a result of proration or otherwise, some but not all of the tendered Shares are purchased pursuant to the Offer. In the event a shareholder does not designate such order and fewer than all Shares are purchased due to proration, the Depositary will select the order of Shares purchased.

        We expressly reserve the right, in our sole discretion, to change the per Share purchase price range and to increase or decrease the aggregate purchase price payable for Shares sought in the Offer. We may increase the aggregate purchase price of Shares sought in the Offer to an amount greater than $45 million, subject to applicable law. In accordance with the rules of the SEC, we may increase the aggregate purchase price payable for Shares purchased in the Offer and thereby increase the number of Shares accepted for payment in the Offer by no more than 2% of the outstanding Shares without amending or extending the Offer. However, if we purchase an additional number of Shares in excess of 2% of the outstanding Shares, we will amend and extend the Offer in compliance with applicable law. See Section 15.

        In the event that the Offer is oversubscribed, as described below, Shares tendered at or below the Final Purchase Price prior to the Expiration Time will be subject to proration, except for odd lots. The withdrawal rights also expire at the Expiration Time.

        The Offer is not conditioned on any minimum number of Shares being tendered. The Offer is, however, subject to certain other conditions. See Section 7.

        Priority of Purchases.    On the terms and subject to the conditions of the Offer, if, based on the Final Purchase Price, Shares having an aggregate purchase price in excess of $45 million (or such greater aggregate purchase price as we may elect, subject to applicable law) have been properly tendered at prices at or below the Final Purchase Price and not properly withdrawn before the Expiration Time, we will purchase properly tendered Shares on the basis set forth below:

•

first, we will purchase all Shares properly tendered and not properly withdrawn by any odd lot holder, as described below, who:



•

tenders all Shares owned beneficially or of record by such odd lot holder at a price at or below the Final Purchase Price (tenders of less than all of the Shares owned by such odd lot holder will not qualify for this preference); and



•

completes the section captioned "Odd Lots" in the Letter of Transmittal;



•

second, after the purchase of all of the Shares properly tendered at or below the Final Purchase Price and not properly withdrawn by odd lot holders, we will purchase all other Shares properly tendered at or below the Final Purchase Price and not properly withdrawn on a pro rata basis (excluding Shares subject to conditional tenders for which the condition was not initially satisfied) with appropriate adjustment to avoid purchases of fractional Shares; and



•

third, only if necessary to permit us to purchase Shares having an aggregate purchase price of $45 million (or such greater aggregate purchase price as we may elect, subject to applicable law), we will purchase Shares conditionally tendered (for which the condition was not initially satisfied) at or below the Final Purchase Price and not properly withdrawn, by random lot, to the extent feasible. To be eligible for their Shares to be purchased by random lot, shareholders whose Shares are conditionally tendered must have tendered all of their Shares.

        As a result of the foregoing priorities applicable to the purchase of Shares tendered, it is possible that fewer than all Shares tendered by a shareholder will be purchased or that, if a tender is

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conditioned upon the purchase of a specified number of Shares, none of those Shares will be purchased even though such Shares were tendered at prices at or below the Final Purchase Price.

        As we noted above, we may elect to purchase Shares having an aggregate purchase price of more than $45 million in the Offer, subject to applicable law. If we do so, the preceding provisions will apply to the greater amount.

        Odd Lots.    For purposes of the Offer, the term "odd lots" means all Shares properly tendered at prices at or below the Final Purchase Price held by a shareholder who owns beneficially or of record an aggregate of fewer than 100 Shares, which we refer to as an "odd lot holder," and so certifies in the appropriate place on the Letter of Transmittal, and, if applicable, on the Notice of Guaranteed Delivery. To qualify for this preference, an odd lot holder must tender all Shares owned beneficially or of record by the odd lot holder in accordance with the procedures described in Section 3. As set forth above, odd lots will be accepted for payment before proration, if any, of the purchase of other tendered Shares. This preference is not available to partial tenders or to beneficial or record holders of an aggregate of 100 or more Shares, even if these holders have separate accounts or certificates representing fewer than 100 Shares. By accepting the Offer, an odd lot holder who holds Shares in his or her name and tenders his or her Shares directly to the Depositary would not only avoid the payment of brokerage commissions, but also would avoid any applicable odd lot discounts in a sale of the holder's Shares. Any odd lot holder wishing to tender all of such odd lot holder's Shares pursuant to the Offer should complete the section captioned "Odd Lots" in the Letter of Transmittal, and, if applicable, in the Notice of Guaranteed Delivery.

        Proration.    If proration of tendered Shares is required, we will determine the proration factor promptly following the Expiration Time. Proration for each shareholder tendering Shares, other than odd lot holders, will be based on the ratio of the number of Shares properly tendered and not properly withdrawn by such shareholder to the total number of Shares properly tendered and not properly withdrawn by all shareholders, other than odd lot holders, at or below the Final Purchase Price (excluding Shares subject to conditional tenders for which the condition was not initially satisfied). The preliminary results of any proration will be announced by press release on the business day following the Expiration Time. After the Expiration Time, shareholders may obtain any preliminary proration information from the Information Agent and also may be able to obtain the information from their brokers.

        As described in Section 14, the number of Shares that we will purchase from a shareholder pursuant to the Offer may affect the United States federal income tax consequences to the shareholder of the purchase and, therefore, will be relevant to a shareholder's decision whether to tender Shares. The Letter of Transmittal affords each shareholder who tenders Shares registered in such shareholder's name directly to the Depositary the opportunity to designate the order of priority in which Shares tendered are to be purchased in the event of proration as well as the ability to condition such tender on a minimum number of Shares being purchased.

        This Offer to Purchase and the Letter of Transmittal will be mailed to record holders of the Shares and will be furnished to brokers, dealers, commercial banks, trust companies and other nominees and similar persons whose names, or the names of whose nominees, appear on our shareholder list or, if applicable, who are listed as participants in a clearing agency's security position listing for subsequent transmittal to beneficial owners of Shares.

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2.  Purpose of the Offer; Certain Effects of the Offer.

        Purpose of the Offer.    The Board of Directors believes that the Offer is a prudent use of our financial resources, and provides an efficient way of returning capital to shareholders while providing long-term shareholder value. In particular, the Board of Directors has determined that the all-cash Offer is an effective method for the Company to return to our shareholders a significant portion of the proceeds from the recent sale of our Photovoltaics business to SolAero Technologies Corp. (f/k/a Photon Acquisition Corporation), as well as the recent sale of our Digital Products business to NeoPhotonics Corporation.

        In addition, the Board of Directors believes that the modified "Dutch auction" tender offer set forth in this Offer to Purchase represents a mechanism to provide our shareholders with the opportunity to tender all or a portion of their Shares and, thereby, receive a return of some or all of their investment if they so elect. We believe that the Offer provides shareholders (particularly those who, because of the size of their shareholdings, might not be able to sell their Shares without potential disruption to the Share price) with an opportunity to obtain liquidity with respect to all or a portion of their Shares without potential disruption to the Share price. In addition, if we complete the Offer, shareholders who do not participate in the Offer will automatically increase their relative percentage ownership interest in us and our future operations.

        The Offer also provides our shareholders with an efficient way to sell their Shares without incurring broker's fees or commissions associated with open market sales. However, shareholders who hold Shares through nominees are urged to consult their nominees to determine whether transaction costs may apply if shareholders tender Shares through the nominees and not directly to the Depositary. Furthermore, odd lot holders who hold Shares registered in their names and tender their Shares directly to the Depositary and whose Shares are purchased in the Offer will avoid any applicable odd lot discounts that might otherwise be payable on sales of their Shares. See Section 1.

        In considering the Offer, the Board of Directors took into account the expected financial impact of the Offer, and concluded that the Offer is a prudent use of our financial resources given our business profile, assets and current market price. The Board of Directors considered various additional factors and information before approving the Offer, including, without limitation, other possible methods of repurchasing the Shares, including in the open market or through a fixed price tender offer for the Shares, recent trends in the market regarding modified "Dutch auction" tender offers, trends in the equity market generally, shareholder input, and historical trading performance of our Shares, of the stock of comparable public companies and of related market indices.

        Following the completion or termination of the Offer, we may, from time to time, make additional repurchases of Shares, either in the open market, through public or privately negotiated transactions, in additional tender offers, or otherwise, in accordance with applicable law. Exchange Act Rule 13e-4 generally prohibits us and our affiliates from purchasing any Shares, other than in the Offer, until at least ten business days after the Expiration Time, except pursuant to certain limited exceptions provided in Exchange Act Rule 14e-5.

        Our directors and executive officers are entitled to participate in the Offer on the same basis as all other shareholders. Mr. Becker has informed us that Becker Drapkin Management, L.P. intends to tender an amount of Shares during the Offer that will result in its percentage ownership of the Company following the Expiration Date of the Offer remaining substantially equivalent to its percentage ownership of the Company immediately preceding the Offer. Mr. Bogomolny and Mr. Domenik have informed the Company that they each intend to tender a portion of Shares beneficially owned by them. Our remaining directors and executive officers have advised us that they do not currently intend to tender Shares in the Offer. The equity ownership of our directors, executive officers and affiliates who do not tender their Shares in the Offer will proportionately increase as a percentage of our outstanding common stock following the consummation of the Offer. See Section 11.

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        Certain Effects of the Offer.    Shareholders who decide not to tender their Shares will own a greater percentage interest in the outstanding Shares following the consummation of the Offer. These shareholders will also continue to bear the risks associated with owning the Shares, including risks resulting from our purchase of Shares in the Offer. Shareholders may be able to sell non-tendered Shares in the future on the NASDAQ or otherwise, at a net price significantly higher or lower than the Final Purchase Price in the Offer. We can give no assurance, however, as to the price at which a shareholder may be able to sell his or her Shares in the future.

        We anticipate that there will be a sufficient number of Shares outstanding and publicly traded following completion of the Offer to ensure a continued trading market for the Shares. Based upon the NASDAQ's published guidelines, we do not believe that our purchase of Shares in the Offer will cause our remaining outstanding Shares to be delisted from the NASDAQ. We also believe that our purchase of Shares in the Offer will not result in the Shares becoming eligible for deregistration under the Exchange Act.

        The Board of Directors has approved the Offer. However, neither we nor any member of our Board of Directors, the Dealer Manager, the Information Agent or the Depositary makes any recommendation to you as to whether you should tender or refrain from tendering your Shares or as to the purchase price or purchase prices at which you may choose to tender your Shares. Neither we nor any member of our Board of Directors, the Dealer Manager, the Information Agent or the Depositary has authorized any person to make any recommendation with respect to the Offer. You must make your own decision as to whether to tender your Shares and, if so, how many Shares to tender and the purchase price or purchase prices at which you will tender them. In doing so, you should consult your financial and tax advisors, and read carefully and evaluate the information in this Offer to Purchase and in the Letter of Transmittal, including our reasons for making the Offer.

        Shares we acquire pursuant to the Offer will be held in treasury until otherwise directed by the Board of Directors.

        Except as disclosed or incorporated by reference in this Offer to Purchase, we currently have no plans, proposals or negotiations that relate to or would result in:

•

any extraordinary transaction, such as a merger, reorganization or liquidation, involving us or any of our subsidiaries;



•

any purchase, sale or transfer of an amount of our assets or any of our subsidiaries' assets that is material to us and our subsidiaries, taken as a whole;



•

any material change in our indebtedness or capitalization;



•

any change in our present Board of Directors or management, including, without limitation, any plans or proposals to change the number or the terms of directors (although we may fill current or future vacancies on the Board of Directors), or to change any material term of the employment contract of any executive officer;



•

any material change in our corporate structure or business (although we may reorganize our operations);



•

any class of our equity securities becoming delisted from the NASDAQ or becoming eligible for termination of registration under Section 12(g)(4) of the Exchange Act;



•

the termination or suspension of our obligation to file reports under Section 15(d) of the Exchange Act;



•

the acquisition or disposition by any person of our securities, other than purchases pursuant to our long-term stock-based incentive plans; or

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•

any changes in our charter, bylaws or other governing instruments or other actions that could impede the acquisition of control of us.

        Although we may not currently have any plans, other than as disclosed or incorporated by reference in this Offer to Purchase, that relate to or would result in any of the events discussed above, we may undertake or plan actions that relate to or could result in one or more of these events.

3.  Procedures for Tendering Shares.

        Proper Tender of Shares.    For Shares to be tendered properly pursuant to the Offer, the certificates for such Shares (or confirmation of receipt of such Shares pursuant to the procedure for book-entry transfer set forth below), together with a properly completed and duly executed Letter of Transmittal, including any required signature guarantees, or an "Agent's Message" (as defined below), and any other documents required by the Letter of Transmittal, must be received before 5:00 P.M., New York City time, on Monday, June 15, 2015 by the Depositary at one of its addresses set forth on the back cover of this Offer to Purchase, or the tendering shareholder must, prior to the Expiration date, comply with the guaranteed delivery procedure set forth below.

        In accordance with Instruction 5 of the Letter of Transmittal, shareholders desiring to tender Shares under the Offer must complete the section captioned "Price (In Dollars) Per Share At Which Shares Are Being Tendered" by either (1) checking the box in the section entitled "Shares Tendered At Price Determined Under The Offer" or (2) checking one of the boxes in the section captioned "Shares Tendered At Price Determined By Shareholder," indicating the price at which Shares are being tendered.

        Shareholders who desire to tender Shares at more than one price must complete a separate Letter of Transmittal for each price at which Shares are tendered, provided that the same Shares cannot be tendered (unless properly withdrawn previously in accordance with Section 4) at more than one price. To tender Shares properly, one and only one box must be checked in the section captioned "Price (In Dollars) Per Share At Which Shares Are Being Tendered" in the Letter of Transmittal.

        If tendering shareholders wish to maximize the chance that we will purchase their Shares, they should check the box in the section captioned "Shares Tendered At Price Determined Under The Offer" in the Letter of Transmittal under the section captioned "Price (In Dollars) Per Share At Which Shares Are Being Tendered." Note that this election may have the effect of lowering the Final Purchase Price and could result in the tendered Shares being purchased at the minimum price of $6.25 per Share. If tendering shareholders wish to indicate a specific price (in increments of $0.10) at which their Shares are being tendered, they must check the appropriate box in the section captioned "Shares Tendered At Price Determined By Shareholder" in the section captioned "Price (In Dollars) Per Share At Which Shares Are Being Tendered" in the Letter of Transmittal. Tendering shareholders should be aware that this election could mean that none of their Shares will be purchased if they check a box other than the box representing the price at or below the Final Purchase Price. In addition, odd lot holders who tender all of their Shares must complete the section captioned "Odd Lots" in the Letter of Transmittal, and, if applicable, in the Notice of Guaranteed Delivery, to qualify for the preferential treatment available to odd lot holders as set forth in Section 1.

        Shareholders holding their Shares through a broker, dealer, commercial bank, trust company or other nominee must contact the nominee in order to tender their Shares. Shareholders who hold Shares through nominees are urged to consult their nominees to determine whether transaction costs may apply if shareholders tender Shares through the nominees and not directly to the Depositary.

        Shareholders may tender Shares subject to the condition that all, or a specified minimum number of Shares, be purchased. Any shareholder desiring to make such a conditional tender should so indicate in the section captioned "Conditional Tender" in the Letter of Transmittal, and, if applicable, in the

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Notice of Guaranteed Delivery. It is the tendering shareholder's responsibility to determine the minimum number of Shares to be purchased. Shareholders should consult their financial and tax advisors with respect to the effect of proration of the Offer and the advisability of making a conditional tender. See Section 6 and Section 14.

        Signature Guarantees and Method of Delivery.    No signature guarantee is required if:

•

the Letter of Transmittal is signed by the registered holder of the Shares (which term, for purposes of this Section 3, will include any participant in the Book-Entry Transfer Facility whose name appears on a security position listing as the owner of the Shares) tendered and such holder has not completed the section captioned "Special Issuance Instructions" in the Letter of Transmittal; or



•

Shares are tendered for the account of a bank, broker, dealer, credit union, savings association or other entity that is a member in good standing of the Securities Transfer Agents Medallion Program or an "eligible guarantor institution," as the term is defined in Exchange Act Rule 17Ad-15, each of the foregoing constituting an "Eligible Institution." See Instruction 1 of the Letter of Transmittal.

        If a certificate for Shares is registered in the name of a person other than the person executing the Letter of Transmittal, or if payment is to be made, or Shares not purchased or tendered are to be issued, to a person other than the registered holder, then the certificate must be endorsed or accompanied by an appropriate stock power, signed in either case exactly as the name of the registered holder appears on the certificate, with the signature guaranteed by an Eligible Institution.

        Payment for Shares tendered and accepted for payment pursuant to the Offer will be made only after timely receipt by the Depositary of:

•

either of:



•

certificates for the Shares, or



•

a timely confirmation of the book-entry transfer of the Shares into the Depositary's account at the Book-Entry Transfer Facility as described below; and



•

either of:



•

a properly completed and duly executed Letter of Transmittal, including any required signature guarantees, or



•

an Agent's Message in the case of a book-entry transfer; and



•

any other documents required by the Letter of Transmittal.

        The method of delivery of all documents, including certificates for Shares, the Letter of Transmittal and any other required documents, is at the sole election and risk of the tendering shareholder. If delivery is by mail, then registered mail with return receipt requested, properly insured, is recommended. Shares will be deemed delivered only when actually received by the Depositary (including, in the case of a book-entry transfer, by book-entry confirmation). In all cases, sufficient time should be allowed to ensure timely delivery.

        All deliveries in connection with the Offer, including deliveries of a Letter of Transmittal and certificates for Shares, must be made to the Depositary and not to us, the Dealer Manager, the Information Agent or the Book-Entry Transfer Facility. Any documents delivered to us, the Dealer Manager, the Information Agent or the Book-Entry Transfer Facility will not be forwarded to the Depositary and the Shares to which such documents relate will not be deemed to be properly tendered.

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        Book-Entry Delivery.    The Depositary will establish an account with respect to the Shares for purposes of the Offer at the Book-Entry Transfer Facility within two business days after the date of this Offer to Purchase, and any financial institution that is a participant in the Book-Entry Transfer Facility's system may make book-entry delivery of the Shares by means of a book-entry transfer by causing the Book-Entry Transfer Facility to transfer Shares into the Depositary's account in accordance with the Book-Entry Transfer Facility's procedures for transfer. Although delivery of Shares may be effected through a book-entry transfer into the Depositary's account at the Book-Entry Transfer Facility, a properly completed and duly executed Letter of Transmittal, including any required signature guarantees, or an Agent's Message, and any other required documents must, in any case, be transmitted to and received by the Depositary at one of its addresses set forth on the back cover of this Offer to Purchase before the Expiration Time, or the guaranteed delivery procedure described below must be followed if book-entry transfer of the Shares cannot be effected prior to the Expiration Date. Delivery of documents to the Book-Entry Transfer Facility does not constitute delivery to the Depositary.

        The term "Agent's Message" means a message transmitted by the Book-Entry Transfer Facility to, and received by, the Depositary, which states that the Book-Entry Transfer Facility has received an express acknowledgment from the participant in the Book-Entry Transfer Facility tendering the Shares that such participant has received and agrees to be bound by the terms of the Letter of Transmittal and that we may enforce such agreement against the participant.

        Guaranteed Delivery.    If a stockholder desires to tender Shares in the Offer and the stockholder's Share certificates are not immediately available or cannot be delivered to the Depositary prior to the Expiration Date (or the procedures for book-entry transfer cannot be completed on a timely basis), or if time will not permit delivery of all required documents to the Depositary prior to the Expiration Date, the Shares may still be tendered if all of the following conditions are satisfied:

•

the tender is made by or through an Eligible Institution;



•

the Depositary receives by mail, overnight courier or facsimile transmission, prior to the Expiration Date, a properly completed and duly executed Notice of Guaranteed Delivery substantially in the form EMCORE has provided with this Offer to Purchase, including (where required) a signature guarantee by an Eligible Institution in the form set forth in the Notice of Guaranteed Delivery; and



•

the certificates for all tendered Shares, in proper form for transfer (or confirmation of book-entry transfer of the Shares into the Depositary's account at the Book-Entry Transfer Facility), together with a properly completed and duly executed Letter of Transmittal, or a manually signed facsimile of the Letter of Transmittal, or an Agent's Message in the case of a book-entry transfer, and any required signature guarantees and other documents required by the Letter of Transmittal, are received by the Depositary within three business days after the date of receipt by the Depositary of the Notice of Guaranteed Delivery.

        Stockholders may contact the Information Agent, the Dealer Manager or their broker for assistance. The contact information for the Information Agent and Dealer Manager is on the back cover page of this Offer to Purchase.

        Procedures for Stock Options.    We are not offering, as part of the Offer, to purchase any outstanding stock options, and tenders of stock options will not be accepted. Holders of vested stock options may exercise options and tender the Shares received upon exercise into the Offer. Options must be exercised sufficiently in advance of the Expiration Time in order to have time for such exercise to settle before the Shares received upon exercise of the options may be timely tendered by their holders in the Offer. An exercise of an option cannot be revoked even if Shares received upon the exercise thereof and tendered in the Offer are not purchased in the Offer for any reason.

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        Restricted Stock and Restricted Stock Units.    Restricted stock awards and restricted stock units cannot be tendered in the Offer. To the extent that your restricted stock awards or units vest and the underlying Shares are issued to you prior to the Expiration Time, you will be entitled to tender those Shares in the Offer, subject to the terms and conditions of the Offer.

        Shares Acquired under Company Plans.    Shares that you acquired under our 401(k) Plan, Employee Stock Purchase Plan and Officer and Director Share Purchase Plan may be tendered in the Offer, subject to the terms and conditions of the applicable plan and subject to the terms and conditions of the Offer.

        Return of Unpurchased Shares.    If any tendered Shares are not purchased in the Offer or are properly withdrawn before the Expiration Time, or if less than all Shares evidenced by a shareholder's certificate(s) are tendered, we will return certificates for unpurchased Shares promptly after the expiration or termination of the Offer or proper withdrawal of the Shares, as applicable, or, in the case of Shares tendered by book-entry transfer at the Book-Entry Transfer Facility, the Shares will be credited to the appropriate account maintained by the tendering shareholder at the Book-Entry Transfer Facility, in each case without expense to the shareholder.

        Determination of Validity.    Rejection of Shares; Waiver of Defects; No Obligation to Give Notice of Defects. All questions as to the number of Shares to be accepted, the Final Purchase Price to be paid for Shares to be accepted and the validity, form, eligibility (including time of receipt) and acceptance for payment of any tender of Shares will be determined by us, in our sole discretion, and our determination will be final and binding on all parties. We reserve the absolute right to reject any or all tenders of any Shares that we determine are not in proper form or the acceptance for payment of or payment for which may, in the opinion of our counsel, be unlawful. We also reserve the absolute right to waive any of the conditions of the Offer on or prior to the Expiration Time, or any defect or irregularity in any tender with respect to any particular Shares or any particular shareholder (whether or not we waive similar defects or irregularities in the case of other shareholders), and our interpretation of the terms of the Offer will be final and binding on all parties. In the event a condition is waived with respect to any particular shareholder, the same condition will be waived with respect to all shareholders. No tender of Shares will be deemed to have been properly made until all defects or irregularities have been cured by the tendering shareholder or waived by us. We will not be liable for failure to waive any condition of the Offer, or any defect or irregularity in any tender of Shares. Neither we nor the Dealer Manager, the Depositary, the Information Agent or any other person will be obligated to give notice of any defects or irregularities in tenders, nor will any of the foregoing incur any liability for failure to give any such notification.

        Tendering Shareholder's Representation and Warranty.    Our Acceptance Constitutes an Agreement. It is a violation of Exchange Act Rule 14e-4 for a person, directly or indirectly, to tender Shares for that person's own account unless, at the time of tender and at the end of the proration period or period during which Shares are accepted by lot (including any extensions of such period), the person so tendering:

(1)

has a "net long position," within the meaning of Exchange Act Rule 14e-4, equal to or greater than the amount of Shares tendered in (a) Shares or (b) other securities convertible into or exchangeable or exercisable for Shares and, upon acceptance of the tender, will acquire the Shares by conversion, exchange or exercise; and



(2)

will deliver or cause to be delivered the Shares in accordance with the terms of the Offer (Exchange Act Rule 14e-4 also provides a similar restriction applicable to a tender on behalf of another person).

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        A tender of Shares in accordance with any of the procedures described above will constitute the tendering shareholder's acceptance of the terms and conditions of the Offer, as well as the tendering shareholder's representation and warranty to us that:

(1)

the shareholder has a "net long position," within the meaning of Exchange Act Rule 14e-4, in the Shares or equivalent securities at least equal to the Shares being tendered; and



(2)

the tender of Shares complies with Exchange Act Rule 14e-4.

        A tender of Shares made pursuant to any method of delivery set forth herein will also constitute a representation and warranty to us that the tendering shareholder has full power and authority to tender, sell, assign and transfer the Shares tendered, and that, when the same are accepted for purchase by us, we will acquire good, marketable and unencumbered title thereto, free and clear of all security interests, liens, restrictions, claims, encumbrances and other obligations relating to the sale or transfer of the Shares, and the same will not be subject to any adverse claim or right. Any such tendering shareholder will, on request by the Depositary or us, execute and deliver any additional documents deemed by the Depositary or us to be necessary or desirable to complete the sale, assignment and transfer of the Shares tendered, all in accordance with the terms of the Offer.

        Our acceptance for payment of Shares tendered pursuant to the Offer will constitute a binding agreement between the tendering shareholder and us on the terms and subject to the conditions of the Offer.

        All authority conferred or agreed to be conferred by delivery of the Letter of Transmittal shall be binding on the successors, assigns, heirs, personal representatives, executors, administrators and other legal representatives of the tendering shareholder and shall not be affected by, and shall survive, the death or incapacity of such tendering shareholder.

        Lost, Destroyed or Stolen Certificates.    Shareholders whose certificates for all or any portion of their Shares have been lost, destroyed or stolen may contact American Stock Transfer & Trust Company, LLC, the Depositary and transfer agent for the Shares, at one of its addresses set forth on the back cover of this Offer to Purchase or at the toll free number (877) 248-6417 for instructions to obtain a replacement certificate. To tender such Shares in the Offer, the replacement certificate will then be required to be submitted together with the Letter of Transmittal in order to receive payment for Shares that are tendered and accepted for payment. A bond may be required to be posted by the shareholder to secure against the risk that the certificates may be subsequently recirculated. The Letter of Transmittal and related documents cannot be processed until the procedures for replacing lost, destroyed or stolen certificates have been followed. Shareholders are requested to contact the Depositary immediately in order to permit timely processing of this documentation. Certificates for Shares, together with a properly completed Letter of Transmittal and any other documents required by the Letter of Transmittal, must be delivered to the Depositary and not to us, the Dealer Manager or the Information Agent. Any certificates delivered to us, the Dealer Manager or the Information Agent will not be forwarded to the Depositary and any Shares to which they relate will not be deemed to be properly tendered.

        Backup Withholding.    Under the United States federal income tax laws, payments to a tendering shareholder or other payee who is a U.S. Holder (as defined in Section 14) may be subject to "backup withholding" at the applicable statutory rate (currently 28%), unless a tendering shareholder or other payee:

•

provides a correct taxpayer identification number (which, for an individual shareholder, is the shareholder's social security number) and any other required information and certifies under penalties of perjury, among other things, that the taxpayer identification number is correct; or

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•

is an exempt recipient and, when required, demonstrates this fact and otherwise complies with applicable requirements of the backup withholding rules.

        A shareholder that does not provide a correct taxpayer identification number may be subject to penalties imposed by the Internal Revenue Service (the "IRS"). To prevent backup withholding on cash payable under the Offer, each shareholder should provide the Depositary with his or her correct taxpayer identification number and certify that he or she is not subject to backup withholding by completing the IRS Form W-9 included in the Letter of Transmittal. Certain "exempt recipients" (including, among others, all corporations and certain Non-U.S. Holders (as defined in Section 14)) are not subject to U.S. federal backup withholding tax. In order for a Non-U.S. Holder to qualify as an exempt recipient and avoid backup withholding, such Non-U.S. Holders must complete and sign the appropriate IRS Form W-8, a copy of which may be obtained from the Depositary or at www.irs.gov. See Section 14 and Instruction 10 to the Letter of Transmittal.

        Backup withholding is not an additional tax. Taxpayers may use amounts withheld as a credit against their United States federal income tax liability or may claim a refund of such amounts if they timely provide certain required information to the IRS.

        United States Federal Withholding Tax on Payments to Non-U.S. Holders.    Non-U.S. Holders may be subject to a 30% United States federal withholding tax on payments received pursuant to the Offer. As described in Section 14, a sale of Shares pursuant to the Offer may qualify for sale or exchange treatment or may constitute a taxable dividend, depending on a particular shareholder's facts and circumstances. The Depositary generally will treat payments made to Non-U.S. Holders pursuant to the Offer as taxable dividends. Accordingly, in compliance with United States federal income tax laws, the Depositary will withhold 30% of the gross proceeds payable to a Non-U.S. Holder unless the holder provides the Depositary with (i) a properly executed IRS Form W-8BEN (or other applicable Form W-8) certifying that it is entitled to a reduced rate of withholding under an applicable tax treaty or (ii) a properly executed IRS Form W-8ECI certifying that it is exempt from withholding because the payment is effectively connected with the Non-U.S. Holder's conduct of a trade or business in the United States. A Non-U.S. Holder may be eligible to obtain a refund of all or a portion of any tax withheld if its sale of Shares pursuant to the Offer satisfies the requirements for sale or exchange treatment described in Section 14 or the Non-U.S. Holder is otherwise able to establish that no tax or a reduced amount of tax is due.

        Non-U.S. Holders are urged to consult their tax advisors regarding the application of United States federal income tax withholding, including eligibility for a withholding tax reduction or exemption, and the refund procedure.

        For a more complete discussion of U.S. federal income tax consequences to tendering Shareholders, see "Section 14—Certain United States Federal Income Tax Consequences."

4.  Withdrawal Rights.

        Except as otherwise provided in this Section 4, tenders of Shares pursuant to the Offer are irrevocable. Shares tendered pursuant to the Offer may be withdrawn at any time before the Expiration Time and, unless we have accepted tendered Shares for payment in the Offer, may also be withdrawn at any time after 5:00 P.M., New York City time, on Tuesday, July 14, 2015.

        For a withdrawal to be effective, a notice of withdrawal must be in written form and must be received in a timely manner by the Depositary at one of its addresses set forth on the back cover of this Offer to Purchase. Any notice of withdrawal must specify the name of the tendering shareholder, the number of Shares to be withdrawn, and the name of the registered holder of the Shares. If certificates for Shares to be withdrawn have been delivered to the Depositary, then, before the release of the certificates, the tendering shareholder must also submit the serial numbers shown on the

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particular certificates for Shares to be withdrawn and the signature(s) on the notice of withdrawal must be guaranteed by an Eligible Institution (except in the case of Shares tendered for the account of an Eligible Institution). If Shares have been tendered pursuant to the procedure for book-entry transfer described in Section 3, the notice of withdrawal also must specify the name and the number of the account at the Book-Entry Transfer Facility to be credited with the withdrawn Shares and must otherwise comply with the Book-Entry Transfer Facility's procedures. If a shareholder has used more than one Letter of Transmittal or has otherwise tendered Shares in more than one group of Shares, the shareholder may withdraw Shares using either separate notices of withdrawal or a combined notice of withdrawal, so long as the information specified above is included.

        We will determine all questions as to the form and validity, including the time of receipt, of any notice of withdrawal, in our sole discretion, which determination will be final and binding on all parties. Neither we nor the Dealer Manager, the Depositary, the Information Agent or any other person will be obligated to give notice of any defects or irregularities in any notice of withdrawal, nor will any of the foregoing incur liability for failure to give any such notification. Withdrawals may not be rescinded, and any Shares properly withdrawn will be deemed not properly tendered for purposes of the Offer. However, withdrawn Shares may be re-tendered before the Expiration Time by again following one of the procedures described in Section 3.

        If we extend the Offer, are delayed in our purchase of Shares or are unable to purchase Shares pursuant to the Offer for any reason, then, without prejudice to our rights under the Offer, the Depositary may, subject to applicable law, retain tendered Shares on our behalf, and the Shares may not be withdrawn except to the extent tendering shareholders are entitled to withdrawal rights as described in this Section 4. Our reservation of the right to delay payment for Shares that we have accepted for payment is limited by Exchange Act Rule 13e-4(f)(5), which requires that we must pay the consideration offered or return the Shares tendered promptly after termination or withdrawal of the Offer.

5.  Purchase of Shares and Payment of Purchase Price.

        On the terms and subject to the conditions of the Offer, promptly following the Expiration Time, we will:

•

determine the Final Purchase Price, taking into account the number of Shares so tendered and the prices specified by tendering shareholders; and



•

accept for payment and pay for (and thereby purchase) Shares having an aggregate purchase price of $45 million (or such greater aggregate purchase price as we may elect, subject to applicable law) properly tendered at prices at or below the Final Purchase Price and not properly withdrawn. We may increase the aggregate purchase price payable for Shares purchased in the Offer and thereby increase the number of Shares accepted for payment in the Offer by no more than 2% of the outstanding Shares without amending or extending the Offer.

        For purposes of the Offer, we will be deemed to have accepted for payment (and therefore purchased), subject to the odd lot priority, proration and conditional tender provisions of the Offer, Shares that are properly tendered at or below the Final Purchase Price and not properly withdrawn only when, as and if we give oral or written notice to the Depositary of our acceptance of the Shares for payment pursuant to the Offer.

        On the terms and subject to the conditions of the Offer, promptly after the Expiration Time, we will accept for purchase and pay a single per Share purchase price for all of the Shares accepted for payment in accordance with the Offer. In all cases, payment for Shares tendered and accepted for

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payment in accordance with the Offer will be made promptly, subject to possible delay due to proration, but only after timely receipt by the Depositary of:

•

certificates for Shares or a timely confirmation of a book-entry transfer of Shares into the Depositary's account at the Book-Entry Transfer Facility;



•

a properly completed and duly executed Letter of Transmittal or an Agent's Message in the case of book-entry transfer; and



•

any other documents required by the Letter of Transmittal.

        We will pay for Shares purchased pursuant to the Offer by depositing the aggregate purchase price for the Shares with the Depositary, which will act as agent for tendering shareholders for the purpose of receiving payment from us and transmitting payment to the tendering shareholders. In the event of proration, the Depositary will determine the proration factor and pay for those tendered Shares accepted for payment promptly after the Expiration Time. Certificates for all Shares tendered and not purchased, including all Shares tendered at prices in excess of the Final Purchase Price and Shares not purchased due to proration or conditional tenders, will be returned to the tendering shareholder, or, in the case of Shares tendered by book-entry transfer, will be credited to the account maintained with the Book-Entry Transfer Facility by the participant who delivered the Shares, promptly after the expiration or termination of the Offer at our expense.

        Under no circumstances will interest be paid on the Final Purchase Price for the Shares, regardless of any delay in making payment. In addition, if certain events occur, we may not be obligated to purchase Shares pursuant to the Offer. See Section 7.

        We will pay all stock transfer taxes, if any, payable on the transfer to us of Shares purchased pursuant to the Offer. If, however, payment of the Final Purchase Price is to be made to, or (in the circumstances permitted by the Offer) if unpurchased Shares are to be registered in the name of, any person other than the registered holder, or if tendered certificates are registered in the name of any person other than the person signing the Letter of Transmittal, the amount of all stock transfer taxes, if any (whether imposed on the registered holder or the other person), payable on account of the transfer to the person will be deducted from the Final Purchase Price unless satisfactory evidence of the payment of the stock transfer taxes, or exemption from payment of the stock transfer taxes, is submitted.

6.  Conditional Tender of Shares.

        Subject to the exception for odd lot holders, in the event that the Offer is oversubscribed, Shares tendered at or below the Final Purchase Price prior to the Expiration Time will be subject to proration. See Section 1. As discussed in Section 14, the number of Shares to be purchased from a particular shareholder may affect the tax treatment of the purchase to the shareholder and the shareholder's decision whether to tender. Accordingly, a shareholder may tender Shares subject to the condition that a specified minimum number of the shareholder's Shares tendered pursuant to a Letter of Transmittal must be purchased if any Shares tendered are purchased. Any shareholder desiring to make a conditional tender must so indicate in the section captioned "Conditional Tender" in the Letter of Transmittal, and, if applicable, in the Notice of Guaranteed Delivery. We urge each shareholder to consult with his or her financial or tax advisor with respect to the advisability of making a conditional tender.

        Any tendering shareholder wishing to make a conditional tender must calculate and appropriately indicate the minimum number of Shares that must be purchased from that shareholder if any are to be purchased. After the Offer expires, if, based on the Final Purchase Price determined in the Offer, Shares having an aggregate purchase price of more than $45 million (or such greater aggregate purchase price as we may elect, subject to applicable law) are properly tendered and not properly

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withdrawn, so that we must prorate our acceptance of and payment for tendered Shares, we will calculate a preliminary proration percentage based upon all Shares properly tendered, conditionally or unconditionally. If the effect of this preliminary proration would be to reduce the number of Shares to be purchased from any shareholder below the minimum number specified, the conditional tender will automatically be regarded as withdrawn (except as provided in the next paragraph). All Shares tendered by a shareholder subject to a conditional tender pursuant to the Letter of Transmittal and regarded as withdrawn as a result of proration will be returned to the tendering shareholder at our expense promptly after the Expiration Time. After giving effect to these withdrawals, we will accept the remaining Shares properly tendered, conditionally or unconditionally, on a pro rata basis, if necessary.

        If conditional tenders would otherwise be regarded as withdrawn and would cause the total number of Shares to be purchased to fall below an aggregate purchase price of $45 million (or such greater aggregate purchase price as we may elect, subject to applicable law) then, to the extent feasible, we will select enough of the conditional tenders that would otherwise have been deemed withdrawn to permit us to purchase Shares having an aggregate purchase price of $45 million (or such greater aggregate purchase price as we may elect, subject to applicable law). In selecting among the conditional tenders, we will select by random lot, treating all tenders by a particular taxpayer as a single lot, and will limit our purchase in each case to the designated minimum number of Shares to be purchased. To be eligible to have their Shares purchased by random lot, shareholders whose Shares are conditionally tendered must have tendered all of their Shares in the Offer, and so indicated by checking the appropriate box in the Letter of Transmittal.

7.  Conditions of the Offer.

        The Offer is not conditioned on any minimum number of Shares being tendered. Notwithstanding any other provision of the Offer, we will not be required to accept for payment, purchase or pay for any Shares tendered, and may terminate or amend the Offer or may postpone the acceptance for payment of or the payment for Shares tendered, subject to Exchange Act Rule 13e-4(f)(5), which requires that we must pay the consideration offered or return the Shares tendered promptly after termination or withdrawal of the Offer, if any time on or after the commencement of the Offer and prior to the Expiration Time any of the following events have occurred that, in our reasonable judgment and regardless of the circumstances giving rise to the event or events (excluding any action or inaction by us), makes it inadvisable to proceed with the Offer or with acceptance for payment or payment for the Shares in the Offer:

•

there has been threatened, instituted or pending any action, suit or proceeding by any government or governmental, regulatory or administrative agency, authority or tribunal or by any other person, domestic, foreign or supranational, before any court, authority, agency or other tribunal that directly or indirectly:



•

challenges or seeks to make illegal, or to delay or otherwise directly or indirectly to restrain, prohibit or otherwise affect the consummation of the Offer, the acquisition of some or all of the Shares pursuant to the Offer, seeks to obtain any material damages or otherwise relates in any manner to the Offer; or



•

in our reasonable judgment, could materially and adversely affect our and our subsidiaries' business, condition (financial or otherwise), income, operations or prospects, taken as a whole, or otherwise materially impair our ability to purchase some or all of the Shares pursuant to the Offer;



•

there has been any action threatened, pending or taken, including any settlement, or any approval withheld, or any statute, rule, regulation, judgment, order or injunction threatened, invoked, proposed, sought, promulgated, enacted, entered, amended, enforced or deemed to be applicable to the Offer or us or any of our subsidiaries, including any settlement, by any court,

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government or governmental, regulatory or administrative authority, agency or tribunal, domestic, foreign or supranational, that, in our reasonable judgment, could directly or indirectly:

•

make the acceptance for payment of, or payment for, some or all of the Shares illegal or otherwise restrict or prohibit consummation of the Offer;



•

delay or restrict our ability, or render us unable, to accept for payment or pay for some or all of the Shares to be purchased pursuant to the Offer;



•

materially and adversely affect our or our subsidiaries' or our affiliates' business, condition (financial or otherwise), income, operations or prospects, taken as a whole; or



•

there has been any legislation amending the Code, that has passed either the United States House of Representatives or the Senate or otherwise is pending before the United States House of Representatives or the Senate or any committee thereof, the effect of which would be to change the United States federal income tax consequences of the consummation of the Offer in any manner that would adversely affect us or any of our affiliates;



•

in our reasonable judgment, consummation of the Offer would jeopardize our ability to use any portion of our net operating losses in future tax years due to the potential application of Section 382 of the Code;



•

there has occurred any of the following:



•

any general suspension of trading in, or limitation on prices for, securities on any United States national securities exchange or in the over-the-counter market;



•

the declaration of a banking moratorium or any suspension of payments in respect of banks in the United States, whether or not mandatory;



•

a material change in United States or any other currency exchange rates or a suspension of or limitation on the markets therefor;



•

a decrease of more than 10% in the market price of the Shares or in the general level of market prices for equity securities in the New York Stock Exchange Composite Index, the Dow Jones Industrial Average, the NASDAQ Global Market Composite Index or Standard & Poor's Composite Index of 500 Industrial Companies, in each case measured from the close of trading on May 14, 2015, the last trading day prior to commencement of the Offer;



•

the commencement of a war, armed hostilities or other similar national or international calamity, including, without limitation, an act of terrorism, directly or indirectly involving the United States, on or after May 14, 2015;



•

any material escalation of any war or armed hostilities that had commenced prior to May 14, 2015;



•

any limitation, whether or not mandatory, by any governmental, regulatory or administrative agency or authority on, or any event that, in our reasonable judgment, could materially affect, the extension of credit by banks or other lending institutions in the United States;



•

any change in the general political, market, economic or financial conditions, domestically or internationally, that could reasonably be expected to materially and adversely affect our business or the trading in the Shares; or



•

in the case of any of the foregoing existing at the time of the commencement of the Offer, a material acceleration or worsening thereof;

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•

a tender or exchange offer for any or all of the Shares (other than the Offer), or any merger, acquisition, business combination or other similar transaction with or involving us or any subsidiary, has been proposed, announced or made by any person or has been publicly disclosed; or



•

we learn that:



•

any entity, "group" (as that term is used in Section 13(d)(3) of the Exchange Act) or person has acquired or proposes to acquire beneficial ownership of 5% or more of the outstanding Shares, whether through the acquisition of stock, the formation of a group, the grant of any option or right, or otherwise (other than as and to the extent disclosed in a Schedule 13D or Schedule 13G filed with the SEC on or before May 14, 2015);



•

any entity, group or person who has filed a Schedule 13D or Schedule 13G with the SEC on or before May 14, 2015, has acquired or proposes to acquire, whether through the acquisition of stock, the formation of a group, the grant of any option or right, or otherwise (other than by virtue of the Offer made hereby), beneficial ownership of any percentage greater than 5% of the outstanding Shares;



•

any person, entity or group has filed a Notification and Report Form under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, reflecting an intent to acquire us or any of the Shares, or has made a public announcement reflecting an intent to acquire us or any of our subsidiaries or any of our or their respective assets or securities;



•

any change or changes have occurred in our or our subsidiaries' or affiliates' business, condition (financial or otherwise), properties, assets, income, operations or prospects that, in our reasonable judgment, has or could have a material adverse effect on us or any of our subsidiaries or affiliates or the benefits of the Offer to us;



•

any approval, permit, authorization, favorable review or consent of any governmental entity required to be obtained in connection with the Offer shall not have been obtained on terms satisfactory to us in our reasonable discretion; or



•

we determine that, as a result of the consummation of the Offer and the purchase of the Shares, there will be a reasonable likelihood that the Shares either (1) will be held of record by fewer than 300 persons, or (2) will be delisted from the NASDAQ or be eligible for deregistration under the Exchange Act.

        The conditions referred to above are for our sole benefit and may be asserted by us regardless of the circumstances giving rise to any such condition (excluding any action or inaction by us), and may be waived by us, in whole or in part, at any time and from time to time in our discretion. Our failure at any time to exercise any of the foregoing rights will not be deemed a waiver of any right, and each such right will be deemed an ongoing right that may be asserted at any time and from time to time. However, once the Offer has expired, then all of the conditions of the Offer, other than those requiring receipt of necessary governmental approvals, must have been satisfied or waived. In certain circumstances, if we waive any of the conditions described above, we may be required to extend the Expiration Time. Any determination by us concerning the events described above will be final and binding on all parties. See Section 15.

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8.  Price Range of Shares; Dividends.

        The Shares are listed and traded on the NASDAQ under the trading symbol "EMKR." The following table sets forth, for the fiscal quarters indicated, the high and low sales prices of the Shares on the NASDAQ.

        We have never declared or paid any dividends on the Shares. In addition, our credit and security agreement, as amended, with Wells Fargo Bank, National Association, currently prohibits distributions to our shareholders (other than distributions payable solely in our stock) and our board of directors is not currently able to predict the timing, amount or nature of, or the record dates for distributions, if any, to be made to our shareholders.

        On May 5, 2015, the last full trading day before the announcement and commencement of the Offer, the last reported sale price of the Shares on the NASDAQ was $5.58 per Share. Shareholders are urged to obtain current market quotations for the Shares.

9.  Source and Amount of Funds.

        Assuming that the Offer is fully subscribed, the aggregate purchase price of Shares purchased in the Offer will be $45 million. We expect that the maximum aggregate cost of these purchases, including all fees and expenses applicable to the Offer, will be approximately $800,000. We intend to use cash on hand to purchase Shares in the Offer and to pay all related fees and expenses.

10.  Certain Information Concerning the Company.

        Our Business.    EMCORE Corporation and its subsidiaries offers a broad portfolio of compound semiconductor-based products for the fiber optics market. We were established in 1984 as a New Jersey corporation and we have one reporting segment: Fiber Optics. EMCORE's Fiber Optics business provides optical components, subsystems and systems for high-speed telecommunications, Cable Television (CATV), Wireless and Fiber-To-The-Premises (FTTP) networks, as well as products for

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satellite communications, video transport and specialty photonics technologies for defense and homeland security applications.

        EMCORE's Solar Photovoltaics business, which was sold in December 2014, provided products for space power applications including high-efficiency multi-junction solar cells, Covered Interconnect Cells (CICs) and complete satellite solar panels. We also sold our Digital Products business in January 2015, which included the ITLA, micro-ITLA, T-TOSA and T-XFP product lines within the Company's telecommunications business.

        In addition to organic growth and development of our existing Fiber Optics market, we intend to pursue other strategies to enhance shareholder value, which may include issuing dividends, acquisitions, investments in joint ventures, partnerships, and other strategic alternatives, such as dispositions, reorganizations, recapitalizations or other similar transactions. Accordingly, the Strategy and Alternatives Committee of the Board and our management may from time to time be engaged in evaluating potential strategic opportunities and may enter into definitive agreements with respect to, such transactions or other strategic alternatives.

        We utilize MOCVD (metal-organic chemical vapor deposition) systems that are capable of processing virtually all compound semiconductor-based materials. Our operations include wafer fabrication, device design and production, fiber optic module, subsystem and system design and manufacture, and solar panel engineering and assembly. Many of our manufacturing operations are computer monitored or controlled to enhance production output and statistical control. We employ a strategy of minimizing ongoing capital investments, while maximizing the variable nature of our cost structure. We maintain supply agreements with key suppliers. Where we can gain cost advantages while maintaining quality and intellectual property control, we outsource the production of certain products, subsystems, components, and subassemblies to contract manufacturers located overseas. Our contract manufacturers maintain comprehensive quality assurance and delivery systems, and we continuously monitor them for compliance.

        Our research and development efforts have been focused on maintaining our technological competitive edge by working to improve the quality and features of our product lines. We are also making investments to expand our existing technology and infrastructure in an effort to develop new products and production technology that we can use to expand into new markets. Our industry is characterized by rapid changes in process technologies with increasing levels of functional integration. Our efforts are focused on designing new proprietary processes and products, on improving the performance of our existing materials, components, and subsystems, and on reducing costs in the product manufacturing process.

        We sell our products worldwide through our direct sales force, third party sales representatives and distributors, and application engineers. Our sales force communicates with our customers' engineering, manufacturing, and purchasing personnel to determine product design, qualifications, performance, and price. Our strategy is to use our direct sales force to sell to key accounts and to expand our use of third party sales representatives for increased coverage in international markets and certain domestic segments.

        Availability of Reports and Other Information.    We are subject to the informational filing requirements of the Exchange Act, which obligates us to file reports, statements and other information with the SEC relating to our business, financial condition and other matters. Information, as of particular dates, concerning our directors and officers, their remuneration, options and other equity awards granted to them, the principal holders of our securities and any material interest of these persons in transactions with us is required to be disclosed in proxy statements distributed to our shareholders and filed with the SEC. As required by Exchange Act Rule 13e-4(c)(2), we have also filed with the SEC a Tender Offer Statement on Schedule TO (the "Schedule TO"), which includes additional information relating to the Offer.

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        These reports, statements and other information can be inspected and copied at the public reference facilities maintained by the SEC at 100 F Street, N.E., Washington, D.C. 20549. Copies of this material may also be obtained by mail, upon payment of the SEC's customary charges, from the Public Reference Section of the SEC at 100 F Street, N.E., Washington, D.C. 20549. The SEC also maintains a website on the Internet at www.sec.gov that contains reports, proxy and information statements and other information regarding registrants that file electronically with the SEC, including the Schedule TO and documents incorporated by reference. You may obtain information about the Public Reference Room by calling the SEC for more information at 1-800-SEC-0330.

        Incorporation by Reference.    The rules of the SEC allow us to "incorporate by reference" information into this Offer to Purchase, which means that we can disclose important information to you by referring you to another document filed separately with the SEC. We incorporate by reference each of the following documents (other than any portions of the respective filings that were furnished to, rather than filed with, the SEC under applicable SEC rules):

        Any statement contained in any document incorporated by reference into this Offer to Purchase shall be deemed to be modified or superseded to the extent that an inconsistent statement is made in this Offer to Purchase or any subsequently filed document. Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Offer to Purchase.

        You can obtain any of the documents incorporated by reference in this Offer to Purchase from us or from the SEC's website at the address described above. Documents incorporated by reference, including any exhibits to those documents, are available from us without charge at our principal executive office located at 2015 W. Chestnut Avenue, Alhambra, California 91803. Our main telephone number is (626) 293-3400. Please be sure to include your complete name and address in your request. If you request any incorporated documents, we will promptly mail them to you by first class mail, or another equally prompt means. You may also find additional information by visiting our website at http://www.emcore.com. Our website and the information posted on it or connected to it do not form part of the Offer and are not incorporated by reference in this Offer to Purchase.

11.  Interests of Directors and Executive Officers; Transactions and Arrangements Concerning the Shares.

        Beneficial Ownership.    As of May 1, 2015 we had 32,296,486 issued and outstanding Shares. We are offering to purchase Shares up to an aggregate purchase price of $45 million. At the maximum Final Purchase Price of $6.75 per Share, we could purchase 6,666,666 Shares if the Offer is fully subscribed, which would represent approximately 20.64% of the issued and outstanding Shares as of

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May 1, 2015. At the minimum Final Purchase Price of $6.25 per Share, we could purchase 7,200,000 Shares if the Offer is fully subscribed, which would represent approximately 22.29% of the issued and outstanding Shares as of May 1, 2015.

        Our directors and executive officers are entitled to participate in the Offer on the same basis as all other shareholders. Mr. Becker has informed us that Becker Drapkin Management, L.P. intends to tender an amount of Shares during the Offer that will result in its percentage ownership of the Company following the Expiration Date of the Offer remaining substantially equivalent to its percentage ownership of the Company immediately preceding the Offer. Mr. Bogomolny and Mr. Domenik have informed the Company that they each intend to tender a portion of the Shares beneficially owned by them. Our remaining directors and executive officers have advised us that they do not currently intend to tender Shares in the Offer. The equity ownership of our directors, executive officers and affiliates who do not tender their Shares in the Offer will proportionately increase as a percentage of our outstanding common stock following the consummation of the Offer.

OWNERSHIP OF SECURITIES

SECURITY OWNERSHIP OF
CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

        The following table sets forth as of April 1, 2015 certain information regarding the beneficial ownership of Common Stock of the Company by: (i) each Named Executive Officer of the Company, (ii) each director and nominee, (iii) all directors and executive officers as a group (7 persons), and (iv) each person or "group" (as that term is defined in Section 13(d)(3) of the Exchange Act) known by the Company to be the beneficial owner of more than 5% of the Common Stock of the Company. Except as otherwise indicated, the Company believes, based on information furnished by such persons, that each person listed below has the sole voting and investment power over the shares of Common Stock shown as beneficially owned, subject to common property laws, where applicable. Shares beneficially owned include shares of Common Stock and warrants and options to acquire shares of Common Stock that are exercisable within sixty (60) days of April 1, 2015, and phantom share credits representing shares of Common Stock earned by directors for services on the Board that such directors have elected to defer and which will be settled in Common Stock upon a change of control or after such directors' termination of service as a director of the Company. Unless otherwise indicated, the address of each of the beneficial owners is c/o EMCORE Corporation, 2015 W. Chestnut Street, Alhambra, California 91803.

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        Securities Transactions.    Based on our records and on information provided to us by our directors, executive officers, affiliates and subsidiaries, neither we nor any of our directors, our executive officers, or our affiliates or our subsidiaries nor, to the best of our knowledge, any person controlling the Company or any executive officer or director of any such controlling entity or of our subsidiaries, has effected any transactions involving the Shares during the 60 days prior to May 15, 2015.

        Long-Term Stock-Based Incentives.    We provide long-term incentives to eligible officers, directors, and employees in the form of equity-based awards. We maintain three equity incentive compensation plans, collectively described below as our Equity Plans:

•

the 2000 Stock Option Plan (2000 Plan),



•

the 2010 Equity Incentive Plan (2010 Equity Plan),



•

the 2012 Equity Incentive Plan (2012 Equity Plan).

        As of December 31, 2014, there were 1,145,183 shares remaining available for grant under the Equity Plans.

        Most of our stock options vest and become exercisable over a four to five year period and have a contractual life of 10 years. Certain stock options awarded are intended to qualify as incentive stock options pursuant to Section 422A of the Internal Revenue Code. As of December 31, 2014, there were 1,336,237 options outstanding under the Equity Plans.

        Restricted stock units (RSUs) granted under the 2010 Equity Plan and 2012 Equity Plan typically vest over 3 years and are subject to forfeiture if employment terminates prior to the lapse of the restrictions. RSUs are not considered issued or outstanding common stock until they vest. As of December 31, 2014, there were 522,179 RSUs outstanding under the Equity Plans.

        401(k) Plan.    We have a savings plan that qualifies as a deferred salary arrangement under Section 401(k) of the Internal Revenue Code. Under this savings plan, participating employees, including the Company's executive officers, may defer a portion of their pretax earnings, up to the Internal Revenue Service annual contribution limit. All employer contributions are made in common stock. For the fiscal year ended September 30, 2014, we contributed approximately $1.0 million in common stock to the savings plan. As of December 31, 2014, approximately 678,391.574 shares were held in accounts under the 401(k) Plan.

        Employee Stock Purchase Plan.    We offer all eligible employees, including the Company's executive officers, the opportunity to acquire an ownership interest in the Company by purchasing Shares through a tax-qualified employee stock purchase plan ("ESPP"). Under the ESPP, an employee can withhold, through payroll deductions, up to 10% of his/her earnings, up to certain maximums, to be used to purchase Shares at certain plan-defined dates. The option price is set at 85% of the average of the high and low price for Shares on either the first or last day of the offering period, whichever is lower. As of December 31, 2014, the total amount of common stock issued under the ESPP totaled 2,154,791 shares, and the number of shares available for grant was 1,092,983.

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        Officer and Director Share Purchase Plan.    We have an Officer and Director Share Purchase Plan (ODPP), which allows executive officers and directors of the Company to purchase Shares at fair market value in lieu of salary or, in the case of directors, director fees. Eligible individuals may voluntarily participate in the ODPP by authorizing payroll deductions or, in the case of directors, deductions from director fees for the purpose of purchasing Shares. Elections to participate in the ODPP may only be made during open trading windows under the Company's insider trading policy when the participant does not otherwise possess material non-public information concerning the Company. The Board of Directors has authorized 125,000 Shares to be made available for purchase by officers and directors under the ODPP. As of December 31, 2014, 36,259 Shares had been purchased under the ODPP and 88,741 shares remained available for grant.

        Director Equity Compensation.    Each non-employee director receives an annual award of Shares in an amount equal to $40,000, provided that in the event a person serves as a non-employee director for less than a full plan year, such amount is prorated based on the number of whole calendar months the director served as a non-employee director during the plan year.

        Potential Payments upon Termination or Change in Control.    Each of our executive officers has entered into employment agreements setting forth, among other things, the acceleration and immediate vesting of all the executive officer's outstanding equity awards that remain subject to vesting (except performance-based awards) if the executive officer's employment is terminated without cause, the executive officer terminates his employment for good reason, or within thirty-six months of a change in control of the Company, the executive officer's employment is terminated without cause or the executive officer terminates his employment for good reason.

        The foregoing descriptions of agreements and arrangements involving the Shares are qualified in their entirety by reference to the text of the respective agreements and arrangements, copies of which have been filed with the SEC.

        General.    Except as otherwise described or incorporated by reference in this Offer to Purchase or the Schedule TO, neither we nor, to the best of our knowledge, any of our affiliates, directors or executive officers, is a party to any contract, agreement, arrangement, understanding or relationship with any other person with respect to any of our securities.

12.  Effects of the Offer on the Market for Shares; Registration Under the Exchange Act

        The purchase by us of Shares pursuant to the Offer will reduce the number of Shares that might otherwise be traded publicly and is likely to reduce the number of our shareholders and may decrease the liquidity of the market for Shares. As a result, trading of a relatively small volume of the Shares after consummation of the Offer may have a greater impact on trading prices than would be the case prior to consummation of the Offer.

        We believe that there will be a sufficient number of Shares outstanding and publicly traded following completion of the Offer to ensure a continued trading market for the Shares. Based upon published guidelines of the NASDAQ, we do not believe that our purchase of Shares under the Offer will cause the remaining outstanding Shares to be delisted from the NASDAQ. The Offer is conditioned upon, among other things, our determination that the consummation of the Offer and the purchase of Shares will not cause the Shares to be delisted from the NASDAQ. See Section 7.

        The Shares are registered under the Exchange Act, which requires, among other things, that we furnish certain information to our shareholders and the SEC and comply with the SEC's proxy rules in connection with meetings of our shareholders. We believe that our purchase of Shares under the Offer pursuant to the terms of the Offer will not result in the Shares becoming eligible for deregistration under the Exchange Act.

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        It is a condition of our obligation to purchase Shares pursuant to the Offer that as a result of the consummation of the Offer, there not be a reasonable likelihood that the Shares will be delisted from the NASDAQ or will be eligible for deregistration under the Exchange Act.

13.  Certain Legal Matters; Regulatory Approvals.

        We are not aware of any license or regulatory permit that is reasonably likely to be material to our business that might be adversely affected by our acquisition of Shares as contemplated in the Offer or of any approval or other action by any government or governmental, administrative or regulatory authority or agency, domestic, foreign or supranational, that would be required for our acquisition or ownership of Shares as contemplated by the Offer. Should any approval or other action be required, we presently contemplate that we will seek that approval or other action, but we have no current intention to delay the purchase of Shares tendered pursuant to the Offer pending the outcome of any such matter, subject to our right to decline to purchase Shares if any of the conditions in Section 7 have occurred or have not been waived. We cannot predict whether we would be required to delay the acceptance for payment of or payment for Shares tendered pursuant to the Offer pending the outcome of any such matter. We cannot assure you that any approval or other action, if needed, would be obtained or would be obtained without substantial cost or conditions or that the failure to obtain the approval or other action might not result in adverse consequences to our business and financial condition. If certain types of adverse actions are taken with respect to the matters discussed above, or certain approvals, consents, licenses or permits identified above are not obtained, we can decline to accept for payment or pay for any Shares tendered. See Section 7.

14.  Certain United States Federal Income Tax Consequences.

        The following summary describes certain material United States federal income tax consequences of the Offer to shareholders whose Shares are properly tendered and accepted for payment pursuant to the Offer. Those shareholders who do not participate in the Offer will not incur any United States federal income tax liability as a result of the Offer. This summary addresses only Shares held as "capital assets" within the meaning of Section 1221 of Code (generally, property held for investment). This summary does not address special situations including, without limitation, those of financial institutions, brokers, dealers or traders in securities or commodities, insurance companies, regulated investment companies, real estate investment trusts, "S" corporations, partnerships or other pass-through entities (including entities treated as such for United States federal income tax purposes), United States expatriates, tax-exempt organizations, tax-qualified retirement plans, persons who are subject to alternative minimum tax, persons who hold Shares as a position in a "straddle" or as part of a "hedging," "conversion" or "integrated" transaction, United States persons that have a functional currency other than the United States dollar, controlled foreign corporations, passive foreign investment companies or persons who acquired Shares through the exercise of employee stock options or otherwise as compensation for services.

        This summary does not address all aspects of United States federal income taxation and does not deal with all tax consequences that may be relevant to shareholders in light of their particular circumstances. Furthermore, this summary is based upon the provisions of the Code, the existing and proposed United States Treasury regulations promulgated thereunder and administrative and judicial interpretations thereof, all as of the date hereof, and such authorities may be repealed, revoked, modified or subject to differing interpretations, possibly with retroactive effect, so as to result in United States federal income tax consequences different from those discussed below. This summary does not address any state, local or foreign tax consequences, or any United States federal tax consequences other than United States federal income tax consequences.

        If a partnership (including any entity treated as a partnership for United States federal income tax purposes) is a shareholder, the tax treatment of a partner in the partnership will generally depend upon

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the status of the partner and the activities of the partnership. A shareholder that is a partnership, and partners in such partnership, should consult their tax advisors regarding the tax consequences of participating in the Offer.

        THIS SUMMARY IS FOR GENERAL INFORMATION ONLY AND IS NOT INTENDED TO CONSTITUTE A COMPLETE DESCRIPTION OF ALL TAX CONSEQUENCES RELATING TO THE OFFER. SHAREHOLDERS ARE URGED TO CONSULT THEIR TAX ADVISORS REGARDING THE TAX CONSEQUENCES TO THEM (INCLUDING THE APPLICATION AND EFFECT OF ANY STATE, LOCAL AND FOREIGN INCOME AND OTHER TAX LAWS) OF THE OFFER.

Consequences of the Offer to U.S. Holders.

        The following is a summary of the United States federal income tax consequences that will apply to a U.S. Holder of Shares exchanged pursuant to the Offer. For purposes of this summary, a "U.S. Holder" is a beneficial owner of Shares that for United States federal income tax purposes is:

•

an individual citizen or resident of the United States;



•

a corporation (or other entity taxable as a corporation for United States federal income tax purposes) created or organized in or under the laws of the United States or any State thereof or the District of Columbia;



•

an estate the income of which is subject to United States federal income taxation regardless of its source; or



•

a trust if it is subject to the primary supervision of a court within the United States and one or more United States persons have the authority to control all substantial decisions of the trust, or it has a valid election in effect under applicable United States Treasury regulations to be treated as a United States person.

        An exchange of Shares for cash by a U.S. Holder pursuant to the Offer will be a taxable transaction for U.S. federal income tax purposes. The U.S. federal income tax consequences to a U.S. Holder may vary depending upon the U.S. Holder's particular facts and circumstances. If an exchange of Shares for cash by a U.S. Holder pursuant to the Offer satisfies one of the three tests discussed below (the "Section 302 tests") and is treated as a sale or exchange of such Shares for U.S. federal income tax purposes, the U.S. Holder will generally recognize capital gain or loss in an amount equal to the difference between the amount of cash received and the U.S. Holder's adjusted tax basis in the Shares purchased by us. Such gain or loss will be long-term capital gain or loss if the U.S. Holder's holding period for the Shares at the time of the exchange exceeds one year. Specific limitations may apply to the deductibility of capital losses by a U.S. Holder. A U.S. Holder must calculate gain or loss separately for each block of Shares (generally, Shares acquired at the same cost in a single transaction). A U.S. Holder may be able to designate which blocks of Shares it wishes to tender and the order in which different blocks will be purchased in the event that less than all of its Shares are tendered.

        An exchange of Shares for cash by a U.S. Holder pursuant to the Offer will be treated as a sale or exchange for U.S. federal income tax purposes if the (i) receipt of cash is "not essentially equivalent to a dividend" with respect to the U.S. Holder, (ii) exchange results in a "substantially disproportionate" reduction in the U.S. Holder's equity interest in us, or (iii) exchange results in a "complete redemption" of the U.S. Holder's equity interest in us. In determining whether any of these tests has been met, a U.S. Holder generally must take into account not only Shares it actually owns, but also Shares it constructively owns as determined under section 318 of the Code (including Shares that may be acquired through options that it owns or Shares held by certain members of the U.S. Holder's family). The rules of constructive ownership are complex and each U.S. Holder is urged to consult with its tax advisor regarding the application of such rules.

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        An exchange of Shares for cash by a U.S. Holder pursuant to the Offer will be treated as "not essentially equivalent to a dividend" if it results in a "meaningful reduction" in the U.S. Holder's stock interest in us. Whether such a meaningful reduction of the U.S. Holder's stock interest in us results will depend on the U.S. Holder's particular facts and circumstances. If, as a result of an exchange of Shares for cash pursuant to the Offer, a U.S. Holder whose relative stock interest in us is minimal (for example, less than 1%) and who exercises no control over our corporate affairs suffers any reduction in its proportionate stock interest (including any Shares constructively owned), the U.S. Holder generally should be regarded as having suffered a meaningful reduction in its stock interest in us.

        Satisfaction of the "substantially disproportionate" test or "complete redemption" test is dependent upon satisfaction of the respective objective tests set forth in section 302(b)(2) and section 302(b)(3) of the Code. An exchange of Shares for cash by a U.S. Holder pursuant to the Offer will satisfy the "substantially disproportionate" test if (i) the percentage of such holder's outstanding voting stock in us actually and constructively owned immediately following the exchange is less than 80% of the percentage of the outstanding voting stock actually and constructively owned by the U.S. Holder immediately before the exchange, (ii) the percentage of the outstanding Shares actually and constructively owned by the U.S. Holder immediately following the exchange is less than 80% of the percentage of the outstanding Shares actually and constructively owned by the U.S. Holder immediately before the exchange, and (iii) immediately following the exchange, the U.S. Holder actually and constructively owns less than 50% of the total combined voting power in us. An exchange of Shares for cash by a U.S. Holder pursuant to the Offer will result in a "complete redemption" if either (i) all of the Shares actually and constructively owned by the U.S. Holder are exchanged for cash pursuant to the Offer or (ii) all of the Shares actually owned by the U.S. Holder are exchanged for cash pursuant to the Offer and the U.S. Holder timely and properly waives the attribution of Shares constructively owned by the U.S. Holder in accordance with the procedures described in section 302(c)(2) of the Code and the Treasury Regulations promulgated thereunder.

        If a U.S. Holder's exchange of Shares for cash pursuant to the Offer does not constitute a sale or exchange for U.S. federal income tax purposes, the receipt of cash by such U.S. Holder pursuant to the Offer will be treated as a distribution, and the U.S. Holder's tax basis in the Shares exchanged generally will be added to any Shares retained by the U.S. Holder. The distribution will be treated as a dividend to the extent of our current and accumulated earnings and profits, as determined under U.S. federal income tax principles. To the extent that the amount of the distribution exceeds our current and accumulated earnings and profits, the excess first will be treated as a return of capital that will reduce the U.S. Holder's adjusted tax basis in its Shares, and any remaining portion will be taxable as capital gain. Any such capital gain will be long-term capital gain if the U.S. Holder's holding period for the Shares at the time of the exchange exceeds one year. Provided that minimum holding period requirements and other requirements are met, dividend income with respect to non-corporate U.S. Holders (including individuals) currently is eligible for a reduced rate of U.S. federal income taxation. If an exchange of Shares for cash pursuant to the Offer by a corporate U.S. Holder is treated as a dividend, the corporate U.S. Holder may be (i) eligible for a dividends received deduction (subject to applicable exceptions and limitations) and (ii) subject to the "extraordinary dividend" provisions of section 1059 of the Code. Corporate U.S. Holders are urged to consult their own tax advisors regarding (i) whether a dividends received deduction will be available to them and (ii) the application of section 1059 of the Code in connection with the Offer.

        We cannot predict whether a particular U.S. Holder will be subject to sale or exchange treatment or distribution treatment. If the Offer is over-subscribed, our purchase of Shares properly tendered by a U.S. Holder may be pro-rated. Thus, even if all of the Shares actually and constructively owned by a U.S. Holder are properly tendered, it is possible that not all of the Shares will be purchased by us, which in turn may affect the U.S. Holder's ability to satisfy one of the Section 302 tests described above. Accordingly, a tendering U.S. Holder may choose to submit a "conditional tender" under the procedures described in Section 6, which allows the U.S. Holder to tender Shares subject to the

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condition that a specified minimum number of the U.S. Holder's Shares must be purchased by us if any Shares so tendered are purchased.

Consequences of the Offer to Non-U.S. Holders.

        The following is a summary of the United States federal income tax consequences that will apply to a Non-U.S. Holder of Shares exchanged pursuant to the Offer. A "Non-U.S. Holder" is a beneficial owner of Shares that is not a U.S. Holder.

        The United States federal income tax treatment of our purchase of Shares from a Non-U.S. Holder pursuant to the Offer will depend on whether such holder is treated, based on the Non-U.S. Holder's particular circumstances, as having sold the tendered Shares or as having received a distribution in respect of such Non-U.S. Holder's Shares. The appropriate treatment of the purchase of Shares will be determined in the manner described above with respect to the United States federal income tax treatment of a purchase of Shares pursuant to the Offer in the case of U.S. Holders (see "Consequences of the Offer to U.S. Holders").

        If a Non-U.S. Holder's sale of Shares pursuant to the Offer qualifies as a sale or exchange under any of the Section 302 tests described above, then any gain or loss recognized on the sale will be capital gain or loss. Any capital gain recognized by a Non-U.S. Holder will not be subject to U.S. federal income tax unless (i) such gain is "effectively connected" with a trade or business carried on in the United States by the Non-U.S. Holder (and if an income tax treaty applies, is attributable to a U.S. permanent establishment of the Non-U.S. Holder within the United States) or (ii) the Non-U.S. Holder is an individual who is physically present in the United States for 183 days or more during the taxable year of the sale and certain other conditions are met.

        If a Non-U.S. Holder does not satisfy any of the Section 302 tests described above, amounts received by such Non-U.S. Holder pursuant to the Offer will be treated as a distribution to the Non-U.S. Holder with respect to such Non-U.S. Holder's Shares. In general, any amount that constitutes a dividend for U.S. federal income tax purposes will be subject to U.S. withholding tax at a rate of 30% (or a reduced rate prescribed by an applicable income tax treaty) unless the dividend is effectively connected with a trade or business carried on by the Non-U.S. Holder within the United States (and, if an income tax treaty applies, is attributable to a permanent establishment of the Non-U.S. Holder within the United States), in which case such dividend generally will be subject to U.S. federal income tax on a net income basis, in the same manner as if the Non-U.S. Holder were a resident of the United States. A Non-U.S. Holder that is a corporation may be subject to an additional "branch profits tax" at a rate of 30% (or such lower rate as may be specified by an applicable income tax treaty) with respect to any effectively connected income.

        Withholding For Non-U.S. Holders.    Because, as described above, we cannot predict whether any particular shareholder will be subject to sale or distribution treatment, the Depositary generally will treat the cash received by a Non-U.S. Holder participating in the Offer as a dividend distribution from us. Accordingly, the Depositary generally will withhold United States federal income taxes equal to 30% of the gross proceeds payable to the Non-U.S. Holder or his or her agent, unless (i) an exemption from, or a reduced rate of, withholding tax is available under a tax treaty or such gross proceeds are effectively connected with the conduct of a trade or business of the Non-U.S. Holder within the United States and (ii) the shareholder so certifies on the appropriate IRS Form W-8 as described below. In order to obtain a reduced rate of withholding under a tax treaty, a Non-U.S. Holder must deliver to the Depositary before the payment a properly completed and executed IRS Form W-8BEN (or suitable successor or substitute form). In order to obtain an exemption from withholding on the grounds that the gross proceeds paid under the Offer are effectively connected with the conduct of a trade or business within the United States, a Non-U.S. Holder must deliver to the Depositary a properly completed and executed IRS Form W-8ECI (or suitable successor or substitute form). If tax is withheld, a Non-U.S. Holder may be eligible to obtain a refund of all or a portion of such tax withheld

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if such Non-U.S. Holder satisfies one of the Section 302 tests described above or is otherwise able to establish that no withholding or a reduced amount of withholding is due. Backup withholding generally will not apply to amounts subject to the 30% or treaty-reduced rate of United States federal income tax withholding.

        Non-U.S. Holders may be subject to income tax on the sale of Shares pursuant to the Offer, even if such holders would not be subject to tax if those same Shares were sold on the open market. In addition, Non-U.S. Holders may be subject to a 30% withholding tax on the sale of Shares pursuant to the Offer, even if the transaction is not subject to income tax. Non-U.S. Holders are urged to consult their tax advisors regarding the United States federal income tax consequences of participation in the Offer, including the application of United States federal income tax withholding rules, eligibility for a reduction of or an exemption from withholding tax, and the refund procedure.

Information Reporting and Backup Withholding.

        Payments made to holders in the Offer may be reported to the IRS. In addition, under the United States federal income tax laws, the Depositary will be required to backup withhold at the applicable statutory rate (currently 28%) on the purchase price paid to certain shareholders who are not "exempt recipients" pursuant to the Offer. To avoid such backup withholding, each such U.S. Holder must provide the Depositary with such shareholder's taxpayer identification number and certify that such shareholder is not subject to backup withholding by completing the IRS Form W-9 in the Letter of Transmittal or otherwise establish to the satisfaction of the Depositary that such shareholder is not subject to backup withholding. Certain exempt recipients (including, among others, all corporations and certain Non-U.S. Holders) are not subject to these backup withholding requirements. For a Non-U.S. Holder to qualify for such exemption, such Non-U.S. Holder must submit an IRS Form W-8BEN (or other applicable IRS W-8 Form), signed under penalties of perjury, attesting to such Non-U.S. Holder's exempt status.

        Backup withholding is not an additional tax. Any amounts withheld under the backup withholding rules will be refunded or credited against the shareholder's United States federal income tax liability if certain required information is furnished to the IRS. Shareholders should consult their tax advisors regarding application of backup withholding in their particular circumstances and the availability of, and procedure for obtaining, an exemption from backup withholding under current U.S. Treasury Regulations.

15.  Extension of the Offer; Termination; Amendment.

        We expressly reserve the right, in our sole discretion and subject to applicable law, at any time and from time to time, and regardless of whether any of the events set forth in Section 7 have occurred or shall be deemed by us to have occurred, to extend the period of time the Offer is open and delay acceptance for payment of, and payment for, any Shares by giving oral or written notice of such extension to the Depositary and making a public announcement of such extension. During any such extension, all Shares previously tendered and not properly withdrawn will remain subject to the Offer and to the rights of a tendering shareholder to withdraw such shareholder's Shares.

        We also expressly reserve the right, in our sole discretion, not to accept for payment and not to pay for any Shares not previously accepted for payment or paid for, subject to applicable law, to postpone payment for Shares or to terminate the Offer upon the occurrence of any of the conditions specified in Section 7 by giving oral or written notice of the termination or postponement to the Depositary and making a public announcement of the termination or postponement. Our reservation of the right to delay payment for Shares that we have accepted for payment is limited by Exchange Act Rule 13e-4(f)(5), which requires that we must pay the consideration offered or return the Shares tendered promptly after termination or withdrawal of the Offer.

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        Subject to compliance with applicable law, we further reserve the right, in our reasonable discretion and regardless of whether any of the events set forth in Section 7 have occurred, to amend the Offer in any respect, including, without limitation, by changing the per Share purchase price range or by increasing or decreasing the aggregate purchase price of Shares sought in the Offer. Amendments to the Offer may be made at any time and from time to time by public announcement of the amendment. In the case of an extension, the announcement of the amendment shall be issued no later than 9:00 a.m., New York City time, on the next business day after the last previously scheduled or announced Expiration Time. Any public announcement made pursuant to the Offer will be disseminated promptly to shareholders in a manner reasonably designed to inform shareholders of the change. Without limiting the manner in which we may choose to make a public announcement, except as required by applicable law, we will have no obligation to publish, advertise or otherwise communicate any public announcement other than by issuing a press release to the Dow Jones News Service or comparable service.

        If we materially change the terms of the Offer or the information concerning the Offer, or if we waive a material condition of the Offer, we will extend the Offer to the extent required by Exchange Act Rules 13e-4(d)(2), 13e-4(e)(3) and 13e-4(f)(1). These rules and related releases and interpretations of the SEC provide that the minimum period during which an Offer must remain open following material changes in the terms of the Offer or information concerning the Offer (other than a change in price or a change in percentage of securities sought) will depend on the facts and circumstances, including the relative materiality of the terms or information. If:

•

we increase or decrease the price range to be paid for Shares or increase or decrease the aggregate purchase price payable for Shares sought in the Offer (and thereby increase or decrease the number of Shares purchasable in the Offer), and, in the event of an increase in the aggregate purchase price of Shares purchased in the Offer, the number of shares accepted for payment in the Offer increases by more than 2% of the outstanding Shares; and



•

the Offer is scheduled to expire at any time earlier than the expiration of a period ending on the tenth business day from, and including, the date that notice of such an increase or decrease is first published, sent or given to shareholders in the manner specified in this Section 16;

then in each case the Offer will be extended until the expiration of the period of at least ten business days after such announcement.

        If we increase the aggregate purchase price payable for Shares purchased in the Offer such that the additional amount of Shares accepted for payment in the Offer does not exceed 2% of the outstanding Shares, this will not be deemed a material change to the terms of the Offer and we will not be required to amend or extend the Offer. See Section 1.

        For purposes of the Offer, a "business day" means any day other than a Saturday, Sunday, or United States Federal holiday, and consists of the time period from 12:01 a.m. through 12:00 Midnight, New York City time.

16.  Fees and Expenses.

        We have retained B. Riley & Co., LLC to act as the Dealer Manager in connection with the Offer. The Dealer Manager may communicate with brokers, dealers, commercial banks and trust companies with respect to the Offer. The Dealer Manager will receive a reasonable and customary fee for these services. We also have agreed to reimburse the Dealer Manager for reasonable out-of-pocket expenses incurred in connection with the Offer, including reasonable fees and expenses of counsel, and to indemnify the Dealer Manager against liabilities in connection with the Offer.

        We have retained MacKenzie Partners, Inc. to act as Information Agent and American Stock Transfer & Trust Company, LLC to act as Depositary in connection with the Offer. The Information Agent may contact holders of Shares by mail, telephone, facsimile and personal interviews and may

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request brokers, dealers, commercial banks, trust companies and other nominee shareholders to forward materials relating to the Offer to beneficial owners. The Information Agent and the Depositary will each receive reasonable and customary compensation for their respective services, will be reimbursed by us for reasonable out-of-pocket expenses and will be indemnified against certain liabilities in connection with the Offer.

        Certain officers and employees of the Company may render services in connection with the Offer but will not receive any additional compensation for such services.

        We will not pay any fees or commissions to brokers, dealers, commercial banks, trust companies or other nominees (other than fees to the Dealer Manager and the Information Agent as described above) for soliciting tenders of Shares pursuant to the Offer. Shareholders holding Shares through brokers, dealers, commercial banks, trust companies or other nominees are urged to consult their brokers, dealers, commercial banks, trust companies or other nominees to determine whether transaction costs may apply if shareholders tender Shares through the brokers, dealers, commercial banks, trust companies or other nominees and not directly to the Depositary. We will, however, upon request, reimburse brokers, dealers, commercial banks, trust companies or other nominees for customary mailing and handling expenses incurred by them in forwarding this Offer to Purchase, the Letter of Transmittal and related materials to the beneficial owners of Shares held by them as a nominee or in a fiduciary capacity. No broker, dealer, commercial bank, trust company or other nominee has been authorized to act as our agent or the agent of the Dealer Manager, the Information Agent or the Depositary for purposes of the Offer. We will pay or cause to be paid all stock transfer taxes, if any, on our purchase of Shares except as otherwise provided in Instruction 7 of the Letter of Transmittal.

17.  Miscellaneous.

        We are not aware of any jurisdiction where the making of the Offer is not in compliance with applicable law. If we become aware of any jurisdiction within the United States where the making of the Offer or the acceptance of Shares pursuant to the Offer is not in compliance with any applicable law, we will make a good faith effort to comply with the applicable law. If, after a good faith effort, we cannot comply with the applicable law, the Offer will not be made to, nor will tenders be accepted from or on behalf of, the holders of Shares residing in that jurisdiction. In any jurisdiction where the securities, "blue sky" or other laws require the Offer to be made by a licensed broker or dealer, the Offer will be deemed to be made on our behalf by the Dealer Manager or one or more registered brokers or dealers licensed under the laws of the jurisdiction.

        Pursuant to Exchange Act Rule 13e-4, we have filed with the SEC the Schedule TO, which contains additional information relating to the Offer. The Schedule TO, including the exhibits and any amendments thereto, may be examined, and copies may be obtained, at the same places and in the same manner set forth in Section 10 with respect to information concerning the Company.

        You should rely only on the information contained in this Offer to Purchase and the Letter of Transmittal or to which we have referred you in this Offer to Purchase. We have not authorized anyone to provide you with information or to make any representation on our behalf in connection with the Offer other than those contained in this Offer to Purchase and the Letter of Transmittal. If given or made, you should not rely on that information or representation as having been authorized by us, any member of the Board of Directors, the Dealer Manager, the Depositary or the Information Agent.

        We have not authorized any person to make any recommendation on our behalf as to whether you should tender or not tender your Shares in the Offer. We have not authorized any person to give any information or to make any representation in connection with the Offer other than those contained in this Offer to Purchase or in the Letter of Transmittal. Any recommendation or any such information or representation made by anyone else must not be relied upon as having been authorized by EMCORE, the Dealer Manager, the Depositary or the Information Agent.

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EMCORE CORPORATION

May 15, 2015

        The Letter of Transmittal and certificates for Shares, and any other required documents, should be sent or delivered by each shareholder or the shareholder's broker, dealer, commercial bank, trust company or nominee to the Depositary at one of its addresses set forth below. To confirm delivery of Shares, shareholders are directed to contact the Depositary. Shareholders submitting certificates representing Shares to be tendered must deliver such certificates together with the Letter of Transmittal and any other required documents to the Depositary by mail or overnight courier. Facsimile copies of Share certificates will not be accepted.

The Depositary for the Offer is:

        Any questions or requests for assistance may be directed to the Information Agent or the Dealer Manager at their respective telephone numbers and addresses set forth below. Requests for additional copies of this Offer to Purchase, the Letter of Transmittal or the Notice of Guaranteed Delivery or related documents may be directed to the Information Agent at its telephone numbers or address set forth below. You may also contact your broker, dealer, commercial bank, trust company or other nominee for assistance concerning the Offer.

The Information Agent for the Offer is:

105 Madison Avenue
New York, New York 10016
(212) 929-5500 (Call Collect)
or
Call Toll-Free (800) 322-2885

Email: tenderoffer@mackenziepartners.com

The Dealer Manager for the Offer is:

11100 Santa Monica Blvd. Suite 800
Los Angeles, California 90025
(310) 966-1444

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Exhibit (a)(1)(B)

Letter of Transmittal
For Tender of Shares of Common Stock of
EMCORE CORPORATION
At a Purchase Price Not Greater than $6.75 per Share
Nor Less than $6.25 per Share
Pursuant to the Offer to Purchase Dated May 15, 2015

The Depositary for the Offer is:

Phone: Toll-free (877) 248-6417
(718) 921-8317
Fax (718) 234-5001

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READ THE INSTRUCTIONS CAREFULLY BEFORE
COMPLETING THIS LETTER OF TRANSMITTAL.

        Indicate below the order (by certificate number) in which Shares are to be purchased in the event of proration (attach additional signed list if necessary). If you do not designate an order, if less than all Shares tendered are purchased due to proration, Shares will be selected for purchase by the Depositary. See Instruction 16.

o Lost, Destroyed or Stolen Certificates. My certificate(s) for              Shares have been lost, destroyed or stolen and I require assistance in replacing the certificates. See Instruction 13.

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YOU MUST SIGN THIS LETTER OF TRANSMITTAL WHERE INDICATED BELOW AND COMPLETE THE IRS FORM W-9 PROVIDED BELOW OR APPROPRIATE IRS FORM W-8.

        This Letter of Transmittal is to be used either if certificates for shares of common stock, no par value per share, of EMCORE Corporation (the "Shares"), being tendered are to be forwarded with this Letter of Transmittal or, unless an Agent's Message (defined below) is utilized, if delivery of Shares is to be made by book-entry transfer to an account maintained by the Depositary at The Depository Trust Company, which is referred to as the Book-Entry Transfer Facility, pursuant to the procedures set forth in Section 3 of the Offer to Purchase dated May 15, 2015 (as may be amended or supplemented from time to time, the "Offer to Purchase"). Tendering shareholders must deliver either the certificates for, or timely confirmation of book-entry transfer in accordance with the procedures described in Section 3 of the Offer to Purchase with respect to, their Shares and all other documents required by this Letter of Transmittal to the Depositary by 5:00 P.M., New York City time, on Monday, June 15, 2015 (as this time and date may be extended at any time or from time to time by EMCORE in its sole discretion in accordance with the terms of the Offer, the "Expiration Time"). All capitalized terms not otherwise defined herein have the meaning ascribed to them in the Offer to Purchase.

        Your attention is directed in particular to the following:

•

If you want to retain the Shares you own, you do not need to take any action.



•

If you want to participate in the Offer and wish to maximize the chance that EMCORE will accept for payment all of the Shares you are tendering by this Letter of Transmittal, you should check the box in the section captioned "Shares Tendered At Price Determined Under The Offer" below under the section captioned "Price (in Dollars) Per Share At Which Shares Are Being Tendered" and complete the other portions of this Letter of Transmittal as appropriate. You should understand that this election may effectively lower the Final Purchase Price and could result in your Shares being purchased at the minimum price of $6.25 per Share.



•

If you wish to select a specific price at which you will be tendering your Shares, you should check one of the boxes in the section captioned "Shares Tendered At Price Determined By Shareholder" under the section captioned "Price (in Dollars) Per Share At Which Shares Are Being Tendered" below and complete the other portions of this Letter of Transmittal as appropriate.

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METHOD OF DELIVERY

	o		CHECK HERE IF CERTIFICATES FOR TENDERED SHARES ARE ENCLOSED HEREWITH.
	o		CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER MADE TO AN ACCOUNT MAINTAINED BY THE DEPOSITARY WITH THE BOOK-ENTRY TRANSFER FACILITY AND COMPLETE THE FOLLOWING (ONLY PARTICIPANTS IN THE BOOK-ENTRY TRANSFER FACILITY MAY DELIVER SHARES BY BOOK-ENTRY TRANSFER):
			Name of Tendering Institution:

			Account Number:

			Transaction Code Number:

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PRICE (IN DOLLARS) PER SHARE AT WHICH SHARES ARE BEING TENDERED
(See Instruction 5)

THE UNDERSIGNED IS TENDERING SHARES AS FOLLOWS (CHECK ONLY ONE BOX UNDER (1) OR (2) BELOW):

1.

SHARES TENDERED AT PRICE DETERMINED UNDER THE OFFER

By checking the box below INSTEAD OF ONE OF THE BOXES UNDER "Shares Tendered At Price Determined By Shareholder," the undersigned hereby tenders Shares at the purchase price as shall be determined by EMCORE in accordance with the terms of the Offer.

o

The undersigned wants to maximize the chance that EMCORE will accept for payment all of the Shares the undersigned is tendering (subject to the possibility of proration). Accordingly, by checking this box instead of one of the price boxes below, the undersigned hereby tenders Shares at, and is willing to accept, the purchase price determined by EMCORE in accordance with the terms of the Offer. The undersigned understands that this action will result in the undersigned's Shares being deemed to be tendered at the minimum price of $6.25 per Share for purposes of determining the Final Purchase Price. This may effectively lower the Final Purchase Price and could result in the undersigned receiving the minimum price of $6.25 per Share.

2.

SHARES TENDERED AT PRICE DETERMINED BY SHAREHOLDER

By checking ONE of the following boxes INSTEAD OF THE BOX UNDER "Shares Tendered At Price Determined Under The Offer," the undersigned hereby tenders Shares at the price checked. The undersigned understands that this action could result in EMCORE purchasing none of the Shares tendered hereby if the purchase price determined by EMCORE for the Shares is less than the price checked below.

o    $6.25

o    $6.55

o    $6.35

o    $6.65

o    $6.45

o    $6.75

CHECK ONLY ONE BOX UNDER (1) OR (2) ABOVE. IF MORE THAN ONE BOX IS CHECKED ABOVE OR IF NO BOX IS CHECKED, THERE IS NO PROPER TENDER OF SHARES.

A SHAREHOLDER DESIRING TO TENDER SHARES AT MORE THAN ONE PRICE MUST COMPLETE A SEPARATE LETTER OF TRANSMITTAL FOR EACH PRICE AT WHICH SHARES ARE TENDERED. THE SAME SHARES CANNOT BE TENDERED, UNLESS PREVIOUSLY PROPERLY WITHDRAWN AS PROVIDED IN SECTION 4 OF THE OFFER TO PURCHASE, AT MORE THAN ONE PRICE.

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CONDITIONAL TENDER
(See Instruction 14)

	A shareholder may tender Shares subject to the condition that a specified minimum number of the shareholder's Shares tendered pursuant to the Letter of Transmittal must be purchased if any Shares tendered are purchased, as described in the Offer to Purchase, particularly in Section 6 of the Offer to Purchase. Unless at least the minimum number of Shares indicated below is purchased by EMCORE pursuant to the terms of the Offer, none of the Shares tendered will be purchased. It is the tendering shareholder's responsibility to calculate the minimum number of Shares that must be purchased if any are purchased, and EMCORE urges shareholders to consult their tax advisors before completing this section. Unless this box has been checked and a minimum number of Shares specified, the tender will be deemed unconditional.
			o		The minimum number of Shares that must be purchased, if any are purchased, is:                          Shares.
	If, because of proration, the minimum number of Shares designated will not be purchased, EMCORE may accept conditional tenders by random lot, if necessary. However, to be eligible for purchase by random lot, the tendering shareholder must have tendered all of his or her Shares and checked this box:
			o		The tendered Shares represent all Shares held by the undersigned.

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ODD LOTS
(See Instruction 15)

	To be completed ONLY if Shares are being tendered by or on behalf of a person owning, beneficially or of record, as of the close of business on the date set forth on the signature page hereto, and who continues to own, beneficially or of record, as of the Expiration Time, an aggregate of fewer than 100 Shares. The odd lot preference is not available for partial tenders or to beneficial or record holders of an aggregate of 100 or more Shares, even if these holders have separate accounts or certificates representing fewer than 100 Shares.
	The undersigned is either (check one box):
			o		the beneficial or record owner of an aggregate of fewer than 100 Shares, all of which are being tendered; or
			o		a broker, dealer, commercial bank, trust company, or other nominee that (a) is tendering for the beneficial owner(s) Shares with respect to which it is the record holder, and (b) believes, based upon representations made to it by the beneficial owner(s), that each such person is the beneficial owner of an aggregate of fewer than 100 Shares and is tendering all of the Shares beneficially owned by each such person.

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LOST, STOLEN OR DESTROYED CERTIFICATE(S)

IF ANY STOCK CERTIFICATE REPRESENTING SHARES THAT YOU OWN HAS BEEN LOST, STOLEN OR DESTROYED, PLEASE CONTACT THE DEPOSITARY PROMPTLY AT TOLL FREE (877) 248-6417, OR AT (718) 921-8317, TO OBTAIN INSTRUCTIONS AS TO THE STEPS THAT YOU MUST TAKE IN ORDER TO REPLACE THE CERTIFICATE. THIS LETTER OF TRANSMITTAL AND RELATED DOCUMENTS CANNOT BE PROCESSED UNTIL THE PROCEDURES FOR REPLACING LOST, STOLEN OR DESTROYED CERTIFICATES HAVE BEEN FOLLOWED. PLEASE CONTACT THE DEPOSITARY IMMEDIATELY TO PERMIT TIMELY PROCESSING OF THE REPLACEMENT DOCUMENTATION. SEE INSTRUCTION 13.

NOTE: SIGNATURES MUST BE PROVIDED WHERE INDICATED BELOW.
PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY.

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To American Stock Transfer & Trust Company, LLC,

        The undersigned hereby tenders to EMCORE Corporation, a New Jersey corporation ("EMCORE"), the above-described shares of EMCORE's common stock, no par value per share (the "Shares"), at the price per Share indicated in this Letter of Transmittal, net to the seller in cash, less any applicable withholding taxes and without interest, upon the terms and subject to the conditions set forth in EMCORE's Offer to Purchase dated May 15, 2015 (as may be amended or supplemented from time to time, the "Offer to Purchase") and this Letter of Transmittal (which together, as they may be amended or supplemented from time to time, constitute the "Offer"), receipt of which is hereby acknowledged.

        Subject to and effective on acceptance for payment of, and payment for, the Shares tendered with this Letter of Transmittal in accordance with, and subject to, the terms of the Offer, the undersigned hereby sells, assigns and transfers to, or upon the order of, EMCORE, all right, title and interest in and to all the Shares that are being tendered and irrevocably constitutes and appoints American Stock Transfer & Trust Company, LLC (the "Depositary"), the true and lawful agent and attorney-in-fact of the undersigned, with full power of substitution (such power of attorney being deemed to be an irrevocable power coupled with an interest), to the full extent of the undersigned's rights with respect to such tendered Shares, to (a) deliver certificates for such tendered Shares or transfer ownership of such tendered Shares on the account books maintained by The Depository Trust Company (the "Book-Entry Transfer Facility"), together, in any such case, with all accompanying evidences of transfer and authenticity to, or upon the order of, EMCORE upon receipt by the Depositary, as the undersigned's agent, of the aggregate purchase price with respect to such tendered Shares, (b) present such tendered Shares for cancellation and transfer on EMCORE's books and (c) receive all benefits and otherwise exercise all rights of beneficial ownership of such tendered Shares, all in accordance with the terms of the Offer.

        The undersigned hereby represents and warrants that the undersigned has full power and authority to tender, sell, assign and transfer the tendered Shares and, when the same are accepted for payment, EMCORE will acquire good title thereto, free and clear of all liens, security interests, restrictions, claims, encumbrances, and other obligations relating to the sale or transfer of the tendered Shares, and the same will not be subject to any adverse claim or right. The undersigned will, on request by the Depositary or EMCORE, execute and deliver any additional documents deemed by the Depositary or EMCORE to be necessary or desirable to complete the sale, assignment and transfer of the tendered Shares (and any and all such other Shares or other securities or rights), all in accordance with the terms of the Offer.

        All authority conferred or agreed to be conferred pursuant to this Letter of Transmittal shall be binding on the successors, assigns, heirs, personal representatives, executors, administrators and other legal representatives of the undersigned and shall not be affected by, and shall survive, the death or incapacity of the undersigned. Except as stated in the Offer to Purchase, this tender is irrevocable.

        The undersigned understands that:

1.

the proper tender of Shares pursuant to any of the procedures described in Section 3 of the Offer to Purchase and in the instructions to this Letter of Transmittal constitutes the undersigned's acceptance of the terms and conditions of the Offer; EMCORE's acceptance for payment of the tendered Shares will constitute a binding agreement between the undersigned and EMCORE on the terms and subject to the conditions of the Offer;



2.

it is a violation of Rule 14e-4 ("Rule 14e-4") promulgated under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), for a person acting alone or in concert with others, directly or indirectly, to tender Shares for such person's own account unless at the time

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of tender and at the end of the proration period or period during which Shares are accepted by lot (including any extensions of such period) such person has a "net long position" in:

•

the Shares that is equal to or greater than the amount tendered and will deliver or cause to be delivered such Shares for the purpose of tendering to EMCORE within the period specified in the Offer, or



•

other securities issued by EMCORE immediately convertible into, exercisable for or exchangeable into Shares ("Equivalent Securities") that is equal to or greater than the amount tendered and, upon the acceptance of such tender, will acquire such Shares by conversion, exchange or exercise of such Equivalent Securities to the extent required by the terms of the Offer and will deliver or cause to be delivered such Shares so acquired for the purpose of tendering to EMCORE within the period specified in the Offer.

Rule 14e-4 also provides a similar restriction applicable to the tender on behalf of another person. A tender of Shares made pursuant to any method of delivery set forth in this Letter of Transmittal will constitute the tendering shareholder's representation and warranty to EMCORE that:

•

such shareholder has a "net long position" in Shares or Equivalent Securities being tendered within the meaning of Rule 14e-4, and



•

such tender of Shares complies with Rule 14e-4.



3.

EMCORE will, upon the terms and subject to the conditions of the Offer, determine a single per Share price (the "Final Purchase Price"), not greater than $6.75 nor less than $6.25 per Share, net to the seller in cash, less any applicable withholding taxes and without interest, that it will pay for Shares properly tendered and not properly withdrawn from the Offer, taking into account the number of Shares so tendered and the prices specified by tendering shareholders;



4.

the Final Purchase Price will be the lowest purchase price, not greater than $6.75 nor less than $6.25 per Share, that will allow EMCORE to purchase Shares having an aggregate purchase price of $45 million, or a lower aggregate purchase price depending on the number of Shares properly tendered and not properly withdrawn;



5.

EMCORE reserves the right, in its sole discretion, to increase or decrease the per Share purchase price and to increase or decrease the aggregate purchase price of Shares sought in the Offer. EMCORE may increase the aggregate purchase price of Shares sought in the Offer to an amount greater than $45 million, subject to applicable law. EMCORE may increase the aggregate purchase price payable for Shares purchased in the Offer and thereby increase the number of Shares accepted for payment in the Offer by up to 2% of the outstanding Shares without amending or extending the Offer;



6.

all Shares properly tendered prior to the Expiration Time at or below the Final Purchase Price and not properly withdrawn will be purchased in the Offer at the Final Purchase Price, upon the terms and subject to the conditions of the Offer, including the "odd lot" priority, proration (if more than the number of Shares sought are properly tendered) and conditional tender provisions described in the Offer to Purchase;



7.

EMCORE will return at its expense all Shares it does not purchase, including Shares tendered at prices greater than the Final Purchase Price and not properly withdrawn and Shares not purchased because of proration or conditional tenders, promptly following the Expiration Time;

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8.

under the circumstances set forth in the Offer to Purchase, EMCORE expressly reserves the right, in its sole discretion, to terminate the Offer at any time upon the occurrence of any of the events set forth in Section 7 of the Offer to Purchase, and to extend the period of time during which the Offer is open at any time and from time to time, and thereby delay acceptance for payment of, and payment for, any Shares by giving oral or written notice of such extension to the Depositary and making a public announcement thereof. During any such extension, all Shares previously properly tendered and not properly withdrawn will remain subject to the Offer and to the rights of a tendering shareholder to withdraw such shareholder's Shares;



9.

EMCORE has advised the undersigned to consult with the undersigned's advisors as to the consequences of tendering or not tendering Shares pursuant to the Offer; and



10.

THE OFFER IS NOT BEING MADE TO (NOR WILL A TENDER OF SHARES BE ACCEPTED FROM OR ON BEHALF OF) HOLDERS RESIDING IN ANY JURISDICTION WITHIN THE UNITED STATES IN WHICH THE MAKING OF THE OFFER OR THE ACCEPTANCE OF SHARES PURSUANT TO THE OFFER WOULD NOT BE IN COMPLIANCE WITH THE LAWS OF THAT JURISDICTION.

        The undersigned agrees to all of the terms and conditions of the Offer.

        Unless otherwise indicated below in the section captioned "Special Issuance Instructions," please issue the check for payment of the purchase price and/or return any certificates for Shares not tendered or accepted for payment in the name(s) of the registered holder(s) appearing under "Description of Shares Tendered." Similarly, unless otherwise indicated under "Special Delivery Instructions," please mail the check for payment of the purchase price and/or return any certificates for Shares not tendered or accepted for payment (and accompanying documents, as appropriate) to the address(es) of the registered holder(s) appearing under "Description of Shares Tendered." In the event that both the "Special Delivery Instructions" and the "Special Payment Instructions" are completed, please issue the check for payment of the purchase price and/or return any certificates for Shares not tendered or accepted for payment (and any accompanying documents, as appropriate) in the name(s) of, and deliver such check and/or return such certificates (and any accompanying documents, as appropriate) to the person or persons so indicated. Unless otherwise indicated below in the section captioned "Special Issuance Instructions," please credit any Shares tendered herewith by book-entry transfer that are not accepted for payment by crediting the account at the Book-Entry Transfer Facility designated above. Appropriate medallion signature guarantees by an Eligible Institution (as defined in Instruction 1) have been included with respect to Shares for which "Special Issuance Instructions" have been given. The undersigned recognizes that EMCORE has no obligation pursuant to the "Special Payment Instructions" to transfer any Shares from the name of the registered holder(s) thereof if EMCORE does not accept for payment any of the Shares.

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SPECIAL ISSUANCE INSTRUCTIONS
(See Instructions 1, 6, 7 and 8)

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SPECIAL PAYMENT INSTRUCTIONS

            To be completed ONLY if certificates for Shares not tendered or not accepted for payment and/or the check for payment of the purchase price of Shares accepted for payment are to be issued in the name of someone other than the undersigned, or if Shares tendered hereby and delivered by book-entry transfer which are not purchased are to be returned by crediting them to an account at the Book-Entry Transfer Facility other than the account designated above.

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SPECIAL DELIVERY INSTRUCTIONS

            To be completed ONLY if certificates for Shares not tendered or not accepted for payment and/or the check for payment of the purchase price of Shares accepted for payment are to be sent to someone other than the undersigned or to the undersigned at an address other than that above.

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IMPORTANT: SHAREHOLDERS SIGN HERE

 

(Must be signed by registered holder(s) exactly as name(s) appear(s) on stock certificate(s) or by person(s) authorized to become registered holder(s) of stock certificate(s) as evidenced by endorsement or stock powers transmitted herewith. If signed by a trustee, executor, administrator, guardian, attorney-in-fact, officer of a corporation or other person acting in a fiduciary or representative capacity, the full title of the person should be set forth. See Instruction 6.)

 

 

(Complete Accompanying IRS Form W-9 or Appropriate IRS Form W-8)

Signature(s) Guarantee
(See Instructions 1 and 6)

Complete ONLY if required by Instruction l.

Your signature must be medallion guaranteed by an Eligible Institution (see Instruction 1).

NOTE: A notarization by a notary public is not acceptable.

FOR USE BY FINANCIAL INSTITUTION ONLY.

PLACE MEDALLION GUARANTEE IN SPACE BELOW.

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INSTRUCTIONS

Forming Part of the Terms and Conditions of the Offer

        1.    Guarantee of Signatures.    No signature guarantee is required on this Letter of Transmittal if:

•

this Letter of Transmittal is signed by the registered holder(s) (which term, for purposes of this Instruction 1, includes any participant in the Book-Entry Transfer Facility's system whose name appears on a security position listing as the owner of the Shares) of Shares tendered herewith, unless such registered holder(s) has (have) completed the section captioned "Special Issuance Instructions" in this Letter of Transmittal); or



•

such Shares are tendered for the account of a bank, broker, dealer, credit union, savings association or other entity that is a member in good standing of a Medallion Program approved by the Securities Transfer Agents Association, Inc., including the Securities Transfer Agents Medallion Program, the New York Stock Exchange, Inc. Medallion Signature Program or the Stock Exchange Medallion Program, or is otherwise an "eligible guarantor institution," as the term is defined in Rule 17Ad-15 under the Exchange Act, each of the foregoing constituting an "Eligible Institution."

        In all other cases, all signatures on this Letter of Transmittal must be guaranteed by an Eligible Institution. See Instruction 6. If you have any questions regarding the need for a signature guarantee, please call the Information Agent, MacKenzie Partners, Inc., toll-free at (800) 322-2885 or (212) 929-5500 (collect).

        2.    Requirements of Tender.    This Letter of Transmittal is to be completed by shareholders either if certificates are to be forwarded herewith or, unless an Agent's Message is utilized, if delivery of Shares is to be made pursuant to the procedures for book-entry transfer set forth in Section 3 of the Offer to Purchase. For a shareholder to properly tender Shares pursuant to the Offer, either:

•

a Letter of Transmittal, properly completed and duly executed, and the certificate(s) representing the tendered Shares, together with any required signature guarantees, and any other required documents, must be received by the Depositary at one of its addresses set forth on the back cover of this Letter of Transmittal prior to the Expiration Time; or



•

a Letter of Transmittal, properly completed and duly executed, together with any required signature guarantees or an Agent's Message (in the case of a book-entry transfer) and any other required documents, must be received by the Depositary at one of its addresses set forth on the back cover of this Letter of Transmittal prior to the Expiration Time and Shares must be delivered pursuant to the procedures for book-entry transfer set forth in this Letter of Transmittal (and a book-entry confirmation must be received by the Depositary) prior to the Expiration Time.

        Tenders of Shares made pursuant to the Offer may be withdrawn at any time prior to the Expiration Time. If EMCORE extends the Offer beyond that time, tendered Shares may be withdrawn at any time until the extended Expiration Time. Shares that have not previously been accepted by EMCORE for payment may be withdrawn at any time after 5:00 P.M., New York City time, on Tuesday, July 14, 2015. To withdraw tendered Shares, shareholders must deliver a written notice of withdrawal to the Depositary within the prescribed time period at one of its addresses set forth on the back cover of this Letter of Transmittal. Any notice of withdrawal must specify the name of the tendering shareholder, the number of Shares to be withdrawn, and the name of the registered holder of the Shares. In addition, if the certificates for Shares to be withdrawn have been delivered to the Depositary, then, before the release of the certificates, the tendering shareholder must also submit the serial numbers shown on the particular certificates for Shares to be withdrawn and the signature(s) on the notice of withdrawal must be guaranteed by an Eligible Institution (except in the case of Shares

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tendered by an Eligible Institution). If Shares have been tendered pursuant to the procedures for book-entry transfer, the notice of withdrawal must also specify the name and the number of the account at the Book-Entry Transfer Facility to be credited with the withdrawn Shares and otherwise comply with the Book-Entry Transfer Facility's procedures.

        Withdrawals may not be rescinded and any Shares withdrawn will not be properly tendered for purposes of the Offer unless the withdrawn Shares are properly re-tendered prior to the Expiration Time by following the procedures described above.

        THE METHOD OF DELIVERY OF SHARES, THIS LETTER OF TRANSMITTAL AND ANY OTHER REQUIRED DOCUMENTS, INCLUDING DELIVERY THROUGH THE BOOK-ENTRY TRANSFER FACILITY, IS AT THE SOLE ELECTION AND RISK OF THE TENDERING SHAREHOLDER. SHARES, THIS LETTER OF TRANSMITTAL AND ALL OTHER DOCUMENTS WILL BE DEEMED DELIVERED ONLY WHEN ACTUALLY RECEIVED BY THE DEPOSITARY (INCLUDING, IN THE CASE OF A BOOK-ENTRY TRANSFER, BY BOOK-ENTRY CONFIRMATION). IF YOU ELECT TO DELIVER BY MAIL, WE RECOMMEND THAT YOU USE REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, AND THAT YOU PROPERLY INSURE THE DOCUMENTS. IN ALL CASES, YOU SHOULD ALLOW SUFFICIENT TIME TO ENSURE TIMELY DELIVERY.

        Except as specifically provided by the Offer to Purchase, no alternative, conditional or contingent tenders of Shares will be accepted. No fractional Shares will be purchased. All tendering shareholders, by execution of this Letter of Transmittal, waive any right to receive any notice of the acceptance for payment of their Shares.

        3.    Inadequate Space.    If the space provided in this Letter of Transmittal is inadequate, the certificate numbers and/or the number of Shares should be listed on a separate signed schedule attached hereto.

        4.    Partial Tenders.    If fewer than all of the Shares represented by any certificate submitted to the Depositary are to be tendered, fill in the number of Shares that are to be tendered in the section captioned "Number of Shares Tendered." In any such case, new certificate(s) for the remainder of the Shares that were evidenced by the old certificate(s) will be sent to the registered holder(s), unless otherwise provided in the appropriate section on this Letter of Transmittal, as soon as practicable after the acceptance for payment of, and payment for, the Shares tendered herewith. All Shares represented by certificates delivered to the Depositary and all book-entry Shares held by the Depositary will be deemed to have been tendered unless otherwise indicated.

        5.    Indication of Price at Which Shares are Being Tendered.    For Shares to be properly tendered, the shareholder MUST either (1) check the box in the section captioned "Shares Tendered At Price Determined Under The Offer" in order to maximize the chance of having EMCORE accept for payment all of the Shares tendered (subject to the possibility of proration) or (2) check the box indicating the price per Share at which such shareholder is tendering Shares under "Shares Tendered At Price Determined by Shareholder." Selecting option (1) could result in the shareholder receiving the minimum price per Share of $6.25. ONLY ONE BOX UNDER (1) OR (2) MAY BE CHECKED. IF MORE THAN ONE BOX IS CHECKED OR IF NO BOX IS CHECKED, THERE IS NO PROPER TENDER OF SHARES. A SHAREHOLDER WISHING TO TENDER PORTIONS OF SUCH SHAREHOLDER'S SHARE HOLDINGS AT DIFFERENT PRICES MUST COMPLETE A SEPARATE LETTER OF TRANSMITTAL FOR EACH PRICE AT WHICH SUCH SHAREHOLDER WISHES TO TENDER EACH SUCH PORTION OF SUCH SHAREHOLDER'S SHARE HOLDINGS. The same Shares cannot be tendered, unless previously properly withdrawn as provided in Section 4 of the Offer to Purchase, more than once or at more than one price.

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        6.    Signatures on Letter of Transmittal, Stock Powers and Endorsements.    If this Letter of Transmittal is signed by the registered holder(s) of the Shares tendered hereby, the signature(s) must correspond with the name(s) as written on the face of the certificate(s) without any change or alteration whatsoever.

        If any of the Shares tendered hereby are owned of record by two or more joint owners, all such persons must sign this Letter of Transmittal.

        If any Shares tendered hereby are registered in different names on several certificates, it will be necessary to complete, sign and submit as many separate Letters of Transmittal as there are different registrations of certificates.

        If this Letter of Transmittal or any certificate or stock power is signed by a trustee, executor, administrator, guardian, attorney-in-fact, officer of a corporation or other person acting in a fiduciary or representative capacity, he or she should so indicate when signing and submit proper evidence satisfactory to EMCORE of his or her authority to so act.

        If this Letter of Transmittal is signed by the registered owner(s) of the Shares tendered hereby, no endorsements of certificates or separate stock powers are required unless payment of the purchase price is to be made, or certificates for Shares not tendered or accepted for payment are to be issued, to a person other than the registered owner(s). Signatures on any such certificates or stock powers must be guaranteed by an Eligible Institution.

        If this Letter of Transmittal is signed by a person other than the registered owner(s) of the Shares tendered hereby, the certificate(s) representing such Shares must be properly endorsed for transfer or accompanied by appropriate stock powers, in either case signed exactly as the name(s) of the registered owner(s) appear(s) on the certificates(s). The signature(s) on any such certificate(s) or stock power(s) must be guaranteed by an Eligible Institution.

        7.    Stock Transfer Taxes.    EMCORE will pay any stock transfer taxes with respect to the transfer and sale of Shares to it pursuant to the Offer. If, however, payment of the purchase price is to be made to, or if Shares not tendered or accepted for payment are to be registered in the name of, any person(s) other than the registered owner(s), or if Shares tendered hereby are registered in the name(s) of any person(s) other than the person(s) signing this Letter of Transmittal, the amount of any stock transfer taxes (whether imposed on the registered owner(s) or such other person(s)) payable on account of the transfer to such person(s) will be deducted from the purchase price unless satisfactory evidence of the payment of such taxes or exemption from the payment of such taxes is submitted with this Letter of Transmittal.

        Except as provided in this Instruction 7, it will not be necessary for transfer tax stamps to be affixed to the certificates listed in this Letter of Transmittal.

        8.    Special Issuance Instructions.    If a check for the purchase price of any Shares accepted for payment is to be issued in the name of, and/or certificates for any Shares not accepted for payment or not tendered are to be issued in the name of and/or returned to, a person other than the signer of this Letter of Transmittal or if a check is to be sent, and/or such certificates are to be returned, to a person other than the signer of this Letter of Transmittal or to an address other than that shown above, you should complete the appropriate section under "Special Issuance Instructions".

        9.    Waiver of Conditions; Irregularities.    All questions as to the number of Shares to be accepted, the Final Purchase Price to be paid for Shares to be accepted, the validity, form, eligibility (including time of receipt) and acceptance for payment of any tender of Shares and the validity (including time of receipt) and form of any notice of withdrawal of tendered Shares will be determined by EMCORE, in its sole discretion, and such determination will be final and binding on all parties. EMCORE may delegate power in whole or in part to the Depositary. EMCORE reserves the absolute right to reject

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any or all tenders of any Shares that EMCORE determines are not in proper form or the acceptance for payment of or payment for which may, in the opinion of EMCORE's counsel, be unlawful. EMCORE reserves the absolute right to reject any notices of withdrawal that it determines are not in proper form. EMCORE also reserves the absolute right, subject to the applicable rules and regulations of the Securities and Exchange Commission, to waive any of the conditions of the Offer prior to the Expiration Time, or any defect or irregularity in any tender or withdrawal with respect to any particular Shares or any particular shareholder (whether or not EMCORE waives similar defects or irregularities in the case of other shareholders), and

        EMCORE's interpretation of the terms of the Offer (including these instructions) will be final and binding on all parties. In the event a condition is waived with respect to any particular shareholder, the same condition will be waived with respect to all shareholders. No tender or withdrawal of Shares will be deemed to have been properly made until all defects or irregularities have been cured by the tendering or withdrawing shareholder or waived by EMCORE. EMCORE will not be liable for failure to waive any condition of the Offer, or any defect or irregularity in any tender or withdrawal of Shares. Unless waived, any defects or irregularities in connection with tenders or withdrawals must be cured within the period of time EMCORE determines. None of EMCORE, the Dealer Manager, the Information Agent, the Depositary or any other person will be obligated to give notice of any defects or irregularities in any tender or withdrawal, nor will any of the foregoing incur any liability for failure to give any such notification.

        10.    Backup Withholding.    In order to avoid backup withholding of U.S. federal income tax on payments of cash pursuant to the Offer, a shareholder surrendering Shares in the Offer must (a) qualify for an exemption, as described below, or (b) provide the Depositary with such shareholder's correct taxpayer identification number ("TIN") (i.e., social security number or employer identification number) on IRS Form W-9 included with this Letter of Transmittal and certify under penalties of perjury that (i) the TIN provided is correct, (ii) (x) the shareholder is exempt from backup withholding, (y) the shareholder has not been notified by the IRS that such shareholder is subject to backup withholding as a result of a failure to report all interest or dividends, or (z) the IRS has notified the shareholder that such shareholder is no longer subject to backup withholding, and (iii) the shareholder is a U.S. person (including a U.S. resident alien). If a shareholder does not provide a correct TIN or fails to provide the certifications described above, the IRS may impose a $50 penalty on such shareholder and payment of cash to such shareholder pursuant to the Offer may be subject to backup withholding at the applicable statutory rate (currently 28%.)

        Backup withholding is not an additional income tax. Rather, the amount of the backup withholding can be credited against the U.S. federal income tax liability of the person subject to the backup withholding, provided that the required information is timely given to the IRS. If backup withholding results in an overpayment of tax, the shareholder may be eligible to obtain a refund upon timely filing an income tax return.

        A tendering shareholder is required to give the Depositary the TIN of the record owner of the Shares being tendered. If the Shares are held in more than one name or are not in the name of the actual owner, consult the instructions to the enclosed IRS Form W-9 for guidance on which number to report.

        If a shareholder has not been issued a TIN and has applied for one or intends to apply for one in the near future, such shareholder should write "Applied For" in the space provided for the TIN in Part I of the IRS Form W-9, and sign and date the IRS Form W-9. Writing "Applied For" means that a shareholder has applied for a TIN or that such shareholder intends to apply for one soon. Notwithstanding that the shareholder has written "Applied For" in Part I, the Depositary will withhold the applicable statutory rate (currently 28%) on all payments made prior to the time a properly certified TIN is provided to the Depositary.

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        Some shareholders are exempt from backup withholding. To prevent possible erroneous backup withholding, exempt shareholders should consult the instructions to the enclosed IRS Form W-9 for additional guidance. A Non-U.S. Holder (as defined below) should complete and sign the main signature form and IRS Form W-8BEN, Certificate of Foreign Status, a copy of which may be obtained from the Depositary, or other applicable IRS Form W-8, in order to avoid backup withholding. See the instructions to the enclosed IRS Form W-9 for more instructions.

        11.    Withholding on Non-U.S. Holders.    Even if a Non-U.S. Holder has provided the required certification to avoid backup withholding, the Depositary will withhold U.S. federal income taxes equal to 30% of the gross payments payable to a Non-U.S. Holder or such holder's agent unless the Depositary determines that a reduced rate of withholding is available pursuant to a tax treaty or that an exemption from withholding is applicable because such gross proceeds are effectively connected with the Non-U.S. Holder's conduct of a trade or business within the United States. See Section 14 of the Offer to Purchase. In order to obtain a reduced rate of withholding pursuant to a tax treaty, a Non-U.S. Holder must deliver to the Depositary before the payment a properly completed and executed IRS Form W-8BEN (or other applicable Form W-8). In order to obtain an exemption from withholding on the grounds that the gross proceeds paid pursuant to the Offer are effectively connected with the conduct of a trade or business within the United States, a Non-U.S. Holder must deliver to the Depositary a properly completed and executed IRS Form W-8ECI. A Non-U.S. Holder may be eligible to obtain a refund of all or a portion of any tax withheld if such Non-U.S. Holder meets those tests described in Section 14 of the Offer to Purchase that would characterize the exchange as a sale (as opposed to a distribution) or is otherwise able to establish that no tax or a reduced amount of tax is due.

        For the purposes of this Instruction 11, a "Non-U.S. Holder" is any shareholder that for U.S. federal income tax purposes is not (i) an individual citizen or resident of the United States, (ii) a corporation (or other entity taxable as a corporation for U.S. federal income tax purposes) created or organized in or under the laws of the United States or any State thereof or the District of Columbia, (iii) an estate the income of which is subject to U.S. federal income taxation regardless of its source, or (iv) a trust if it is subject to the primary supervision of a court within the United States and one or more United States persons have the authority to control all substantial decisions of the trust, or it has a valid election in effect under applicable United States Treasury regulations to be treated as a U.S. person.

        NON-U.S. HOLDERS MAY BE SUBJECT TO UNITED STATES WITHHOLDING TAX AT A 30% RATE ON THE SALE OF SHARES PURSUANT TO THE OFFER, EVEN IF NO SUCH WITHHOLDING WOULD APPLY IF THOSE SAME SHARES WERE SOLD ON THE OPEN MARKET. IN ADDITION, NON-U. S. HOLDERS MAY BE SUBJECT TO A 30% WITHHOLDING TAX ON THE SALE OF SHARES PURSUANT TO THE OFFER EVEN IF THE TRANSACTION IS NOT SUBJECT TO INCOME TAX. NON-U.S. HOLDERS ARE URGED TO CONSULT THEIR TAX ADVISORS REGARDING THE APPLICATION OF THE U.S. FEDERAL INCOME TAX WITHHOLDING RULES, INCLUDING ELIGIBILITY FOR A WITHHOLDING TAX REDUCTION OR EXEMPTION, AND THE REFUND PROCEDURE.

        Any payments made pursuant to the Offer, whether to U.S. or Non-U.S. Holders, that are treated as wages will be subject to applicable wage withholding (regardless of whether an IRS Form W-9 or applicable IRS Form W-8 is provided).

        12.    Requests for Assistance or Additional Copies.    If you have questions or need assistance, you should contact the Information Agent or the Dealer Manager at their respective addresses and telephone numbers set forth on the back cover of this Letter of Transmittal. If you require additional copies of the Offer to Purchase, this Letter of Transmittal, the IRS Form W-9 or other related

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materials, you should contact the Information Agent. Copies will be furnished promptly at EMCORE's expense.

        13.    Lost, Destroyed or Stolen Certificates.    If any certificate representing Shares has been lost, destroyed or stolen, you should promptly notify the Depositary at the toll free number (877) 248-6417. You will then be instructed by the Depositary as to the steps that you must take in order to replace the certificate. This Letter of Transmittal and related documents cannot be processed until the procedures for replacing lost, destroyed or stolen certificates have been followed.

        14.    Conditional Tenders.    As described in Section 3 and Section 6 of the Offer to Purchase, shareholders may condition their tenders on all or a minimum number of their tendered Shares being purchased.

        If you wish to make a conditional tender you must indicate this in the section captioned "Conditional Tender" in this Letter of Transmittal. In this section of this Letter of Transmittal, you must calculate and appropriately indicate the minimum number of Shares that must be purchased, if any are to be purchased.

        As discussed in Section 3 and Section 6 of the Offer to Purchase, proration may affect whether EMCORE accepts conditional tenders and may result in Shares tendered pursuant to a conditional tender being deemed withdrawn if the minimum number of Shares would not be purchased. If, because of proration (because more than the number of Shares sought are properly tendered), the minimum number of Shares that you designate will not be purchased, EMCORE may accept conditional tenders by random lot, if necessary. However, to be eligible for purchase by random lot, you must have tendered all of your Shares and checked the box so indicating in the section captioned "Conditional Tender" in this Letter of Transmittal. Upon selection by lot, if any, EMCORE will limit its purchase in each case to the designated minimum number of Shares.

        All tendered Shares will be deemed unconditionally tendered unless the "Conditional Tender" section is completed.

        The conditional tender alternative is made available so that a shareholder may seek to structure the purchase of Shares pursuant to the Offer in such a manner that the purchase will be treated as a sale of such Shares by the shareholder, rather than dividend distribution to the shareholder, for U.S. federal income tax purposes. If you are an odd lot holder and you tender all of your Shares, you cannot conditionally tender, because your Shares will not be subject to proration. It is your responsibility to calculate the minimum number of Shares that must be purchased from you in order for you to qualify for sale rather than distribution treatment. You are urged to consult your tax advisor. See Section 6 of the Offer to Purchase.

        15.    Odd Lots.    As described in Section 1 of the Offer to Purchase, if EMCORE is to purchase fewer than all Shares tendered before the Expiration Time and not properly withdrawn, the Shares purchased first will consist of all Shares properly tendered and not properly withdrawn by any shareholder who owns, beneficially or of record, an aggregate of fewer than 100 Shares, and who tenders all of the holder's Shares at or below the purchase price. This preference is not available for partial tenders or to beneficial or record holders of an aggregate of 100 or more Shares, even if these holders have separate accounts or certificates representing fewer than 100 Shares. This preference will not be available unless the section captioned "Odd Lots" is completed.

        16.    Order of Purchase in Event of Proration.    As described in Section 1 of the Offer to Purchase, shareholders may designate the order in which their Shares are to be purchased in the event of proration. The order of purchase may have an effect on the U.S. federal income tax classification of any gain or loss on the Shares purchased. See Section 1 and Section 14 of the Offer to Purchase.

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        17.    Notice of Guaranteed Delivery.    Shareholders who cannot deliver their certificates and all other required documents to the Depositary or complete the procedures for book-entry transfer prior to the Expiration Date (as defined in Section 1 of the Offer to Purchase) may tender their Shares by properly completing and duly executing the Notice of Guaranteed Delivery pursuant to the guaranteed delivery procedures set forth in Section 3 of the Offer to Purchase.

        IMPORTANT: THIS LETTER OF TRANSMITTAL, TOGETHER WITH ANY REQUIRED SIGNATURE GUARANTEES, OR, IN THE CASE OF A BOOK-ENTRY TRANSFER, AN AGENT'S MESSAGE, AND ANY OTHER REQUIRED DOCUMENTS, MUST BE RECEIVED BY THE DEPOSITARY PRIOR TO THE EXPIRATION TIME, AND EITHER CERTIFICATES FOR TENDERED SHARES MUST BE RECEIVED BY THE DEPOSITARY OR SHARES MUST BE DELIVERED PURSUANT TO THE PROCEDURES FOR BOOK-ENTRY TRANSFER, AND A BOOK-ENTRY CONFIRMATION MUST BE RECEIVED BY THE DEPOSITARY, IN EACH CASE PRIOR TO THE EXPIRATION TIME.

What Number to Give the Depositary

        The shareholder (or other payee) is required to give the Depositary the social security number or employer identification number of the record holder (or any other payee) of the Shares tendered hereby. If the Shares are registered in more than one name or are not in the name of the actual owner, consult the instructions to the enclosed IRS Form W-9 for guidance on which TIN to report. If the tendering shareholder (or other payee) has not been issued a TIN and has applied for one or intends to apply for one in the near future, the shareholder (or other payee) should write "Applied For" in the space provided for the TIN in Part I and sign and date the IRS Form W-9. If "Applied For" is written in Part I and the Depositary is not provided with a TIN by the time of payment, the Depositary will withhold 28% of all payments to such shareholder (or other payee) until a properly certified TIN is provided to the Depositary.

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Print or type
        See Specific Instructions on page 2.

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  Part I Taxpayer Identification Number (TIN)

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  Part II Certification

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Under penalties of perjury, I certify that:

Certification instructions. You must cross out item 2 above if you have been notified by the IRS that you are currently subject to backup withholding because you have failed to report all interest and dividends on your tax return. For real estate transactions, item 2 does not apply. For mortgage interest paid, acquisition or abandonment of secured property, cancellation of debt, contributions to an individual retirement arrangement (IRA), and generally, payments other than interest and dividends, you are not required to sign the certification, but you must provide your correct TIN. See the instructions on page 3.

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        The Letter of Transmittal and certificates for Shares, and any other required documents, should be sent or delivered by each shareholder or the shareholder's broker, dealer, commercial bank, trust company or nominee to the Depositary at one of its addresses set forth below. To confirm delivery of Shares, shareholders are directed to contact the Depositary. Shareholders submitting certificates representing Shares to be tendered must deliver such certificates together with the Letter of Transmittal and any other required documents by mail, express or overnight courier. Facsimile copies of Share certificates will not be accepted.

The Depositary for the Offer is:

American Stock Transfer & Trust Company, LLC

Toll-free (877) 248-6417
(718) 921-8317
Fax (718) 234-5001

        Any questions or requests for assistance may be directed to the Information Agent or the Dealer Manager at their respective telephone numbers and addresses set forth below. Requests for additional copies of the Offer to Purchase, this Letter of Transmittal or related documents may be directed to the Information Agent at its telephone numbers or address set forth below. You may also contact your broker, dealer, commercial bank, trust company or other nominee for assistance concerning the Offer.

The Information Agent for the Offer is:

105 Madison Avenue
New York, New York 10016
(212) 929-5500 (Call Collect)
or
Call Toll-Free (800) 322-2885

Email: tenderoffer@mackenziepartners.com

The Dealer Manager for the Offer is:

11100 Santa Monica Blvd. Suite 800
Los Angeles, California 90025
(310) 966-1444

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Exhibit (a)(1)(B)

READ THE INSTRUCTIONS CAREFULLY BEFORE COMPLETING THIS LETTER OF TRANSMITTAL.
YOU MUST SIGN THIS LETTER OF TRANSMITTAL WHERE INDICATED BELOW AND COMPLETE THE IRS FORM W-9 PROVIDED BELOW OR APPROPRIATE IRS FORM W-8.
METHOD OF DELIVERY
INSTRUCTIONS Forming Part of the Terms and Conditions of the Offer
What Number to Give the Depositary
The Dealer Manager for the Offer is



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Exhibit (a)(1)(C)

NOTICE OF GUARANTEED DELIVERY

(Not to be used for Signature Guarantee)
for Tender of Shares of Common Stock of
EMCORE Corporation

        As set forth in Section 3 of the Offer to Purchase (as defined below) this form must be used to accept the Offer (as defined below) if (1) certificates representing your shares of common stock of EMCORE Corporation, a New Jersey corporation (the "Company"), no par value per share (the "Shares"), are not immediately available or cannot be delivered to the Depositary prior to the Expiration Date (or the procedures for book-entry transfer described in the Offer to Purchase and the related Letter of Transmittal cannot be completed on a timely basis), or (2) time will not permit delivery of all required documents, including a properly completed and duly executed Letter of Transmittal, to reach the Depositary prior to the Expiration Date.

        This form, signed and properly completed, may be transmitted by facsimile or delivered by mail or overnight delivery to the Depositary. See Section 3 of the Offer to Purchase. All capitalized terms used and not defined herein shall have the same meanings as in the Offer to Purchase.

The Depositary for the Offer is:

Toll-free (877) 248-6417
(718) 921-8317
Fax (718) 234-5001

DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS, OR
TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE NUMBER, OTHER THAN AS SET
FORTH ABOVE, WILL NOT CONSTITUTE A VALID DELIVERY.

        For this Notice of Guaranteed Delivery to be validly delivered, it must be received by the Depositary at one of the above addresses, or by facsimile transmission, prior to the Expiration Date. Deliveries to the Company, to the Dealer Manager, the Information Agent or the book-entry transfer facility (as described in the Offer to Purchase) will not be forwarded to the Depositary and therefore will not constitute valid delivery. Deliveries to The Depository Trust Company will not constitute valid delivery to the Depositary.

        This Notice of Guaranteed Delivery is not to be used to guarantee signatures. If a signature on a Letter of Transmittal is required to be guaranteed by an Eligible Institution under the instructions in the Letter of Transmittal, the signature guarantee must appear in the applicable space provided in the signature box on the Letter of Transmittal.

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Ladies and Gentlemen:

        The undersigned hereby tenders to EMCORE Corporation, a New Jersey corporation (the "Company"), at the price per Share indicated in this Notice of Guaranteed Delivery, on the terms and subject to the conditions set forth in the Offer to Purchase, dated May 15, 2015 (the "Offer to Purchase"), and the related Letter of Transmittal (which together, as they may be amended or supplemented from time to time, constitute the "Offer"), receipt of which is hereby acknowledged, the number of Shares set forth below, all pursuant to the guaranteed delivery procedures set forth in Section 3 of the Offer to Purchase. All capitalized terms used and not defined herein shall have the same meanings as in the Offer to Purchase.

        Number of Shares to be tendered:                        Shares. Unless otherwise indicated, it will be assumed that all Shares are to be tendered.

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THE GUARANTEE SET FORTH BELOW MUST BE COMPLETED.

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GUARANTEE (NOT TO BE USED FOR SIGNATURE GUARANTEE)

        The undersigned, a firm that is a member in good standing of a recognized Medallion Program approved by the Securities Transfer Association, Inc., including the Securities Transfer Agents Medallion Program, the New York Stock Exchange, Inc. Medallion Signature Program, the Stock Exchange Medallion Program, or an "eligible guarantor institution," as the term is defined in Rule 17Ad-15 under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), hereby guarantees that (1) the above named person(s) "own(s)" the Shares tendered hereby within the meaning of Rule 14e-4 under the Exchange Act, (2) such tender of Shares complies with Rule 14e-4 under the Exchange Act and (3) it will deliver to the Depositary either the certificates representing the Shares tendered hereby, in proper form for transfer, or confirmation of book-entry transfer of such Shares into the Depositary's account at the Depository Trust Company, in any such case, together with a properly completed and duly executed Letter of Transmittal, or a manually signed facsimile of the Letter of Transmittal, or an Agent's Message (as defined in the Offer to Purchase) in the case of a book-entry transfer, and any required signature guarantees and other documents required by the Letter of Transmittal, within three business days (as defined in the Offer to Purchase) after the date of receipt by the Depositary of this Notice of Guaranteed Delivery.

        The Eligible Institution that completes this form must communicate the guarantee to the Depositary and must deliver the Letter of Transmittal and certificates for Shares to the Depositary within the time period stated herein. Failure to do so could result in financial loss to such Eligible Institution.

NOTE: DO NOT SEND CERTIFICATES FOR SHARES WITH THIS NOTICE.
CERTIFICATES FOR SHARES SHOULD BE SENT WITH YOUR LETTER OF TRANSMITTAL.

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Exhibit (a)(1)(C)

GUARANTEE (NOT TO BE USED FOR SIGNATURE GUARANTEE)



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Exhibit (a)(1)(D)

        Offer to Purchase for Cash
by
EMCORE CORPORATION
of
Up to $45,000,000 of Shares of Its Common Stock
at a Purchase Price Not Greater than $6.75 per Share
nor Less than $6.25 per Share

May 15, 2015

To Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees:

        EMCORE Corporation, a New Jersey corporation ("EMCORE"), has appointed us to act as Dealer Manager in connection with its offer to purchase shares of its common stock, no par value per share (the "Shares"), for cash up to an aggregate purchase price of $45 million. EMCORE will purchase Shares at a price not greater than $6.75 nor less than $6.25 per Share, net to the seller in cash, less any applicable withholding taxes and without interest, upon the terms and subject to the conditions set forth in the Offer to Purchase dated May 15, 2015 (the "Offer to Purchase"), and the related Letter of Transmittal (the "Letter of Transmittal", which together with the Offer to Purchase, as they may be amended or supplemented from time to time, constitute the "Offer"). Capitalized terms used herein and not defined herein shall have the meanings given to them in the Offer to Purchase. The description of the Offer in this letter is only a summary and is qualified by all of the terms and conditions of the Offer set forth in the Offer to Purchase and the Letter of Transmittal.

        EMCORE will, upon the terms and subject to the conditions of the Offer, determine a single per Share price that it will pay for Shares properly tendered and not properly withdrawn from the Offer, taking into account the number of Shares so tendered and the prices specified by tendering shareholders. EMCORE will select the lowest purchase price, not greater than $6.75 per Share nor less than $6.25 per Share, that will allow it to purchase Shares having an aggregate purchase price of $45 million, or a lower aggregate purchase price depending on the number of Shares properly tendered and not properly withdrawn (such purchase price, the "Final Purchase Price"). If, based on the Final Purchase Price, Shares having an aggregate purchase price of less than $45 million are properly tendered and not properly withdrawn, EMCORE will buy all Shares properly tendered and not properly withdrawn, subject to the terms and conditions of the Offer. All Shares properly tendered prior to the Expiration Time at prices at or below the Final Purchase Price and not properly withdrawn will be purchased in the Offer at the Final Purchase Price, upon the terms and subject to the conditions of the Offer, including the "odd lot" priority, proration and conditional tender provisions described in the Offer to Purchase. Under no circumstances will interest be paid on the purchase price for the Shares, even if there is a delay in making such payment. All Shares acquired in the Offer will be acquired at the Final Purchase Price. EMCORE reserves the right, in its sole discretion, to change the per Share purchase price range and to increase or decrease the aggregate purchase price payable for Shares sought in the Offer, subject to applicable law. EMCORE may increase the aggregate purchase price payable for Shares purchased in the Offer and thereby increase the number of Shares accepted for payment in the Offer by up to 2% of the outstanding Shares without amending or extending the Offer.

        EMCORE reserves the right, in its sole discretion, to terminate the Offer upon the occurrence of certain conditions more specifically described in Section 7 of the Offer to Purchase, or to amend the Offer in any respect, subject to applicable law.

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        Upon the terms and subject to the conditions of the Offer, if, based on the Final Purchase Price, Shares having an aggregate purchase price in excess of $45 million (or such greater aggregate purchase price as EMCORE may elect, subject to applicable law) have been properly tendered at prices at or below the Final Purchase Price and not properly withdrawn before the Expiration Time, EMCORE will purchase such Shares in the following order of priority: (i) EMCORE will purchase all Shares properly tendered and not properly withdrawn by any holder of an "odd lot" of less than 100 Shares who tenders all Shares owned beneficially or of record by such odd lot holder at a price at or below the Final Purchase Price (tenders of less than all of the Shares owned by such odd lot holder will not qualify for this preference) and who completes the section captioned "Odd Lots" in the Letter of Transmittal; (ii) after the purchase of all of the Shares properly tendered at or below the Final Purchase Price and not properly withdrawn by odd lot holders, EMCORE will purchase all other Shares properly tendered at or below the Final Purchase Price on a pro rata basis (excluding Shares subject to conditional tenders for which the condition was not initially satisfied) with appropriate adjustment to avoid purchases of fractional Shares; and (iii) only if necessary to permit EMCORE to purchase Shares having an aggregate purchase price of $45 million (or such greater aggregate purchase price as EMCORE may elect, subject to applicable law), EMCORE will purchase Shares conditionally tendered (for which the condition was not initially satisfied) at or below the Final Purchase Price, by random lot, to the extent feasible. To be eligible for their Shares to be purchased by random lot, shareholders whose Shares are conditionally tendered must have tendered all of their Shares. As a result of the foregoing priorities applicable to the purchase of Shares tendered, it is possible that fewer than all Shares tendered by a shareholder will be purchased or that, if a tender is conditioned upon the purchase of a specified number of Shares, none of those Shares will be purchased even though such Shares were tendered at prices at or below the Final Purchase Price. Shares tendered at prices greater than the Final Purchase Price and Shares not purchased because of proration or conditional tenders will be returned to the tendering shareholders at EMCORE's expense promptly after the Expiration Time. See Section 1, Section 3 and Section 5 of the Offer to Purchase.

        The Offer is not conditioned on any minimum number of Shares being tendered. The Offer is, however, subject to certain other conditions. See Section 7 of the Offer to Purchase.

        EMCORE's directors and executive officers are entitled to participate in the Offer on the same basis as all other shareholders. Mr. Becker has informed the Company that Becker Drapkin Management, L.P. intends to tender an amount of Shares during the Offer that will result in its percentage ownership of the Company following the Expiration Date of the Offer remaining substantially equivalent to its percentage ownership of the Company immediately preceding the Offer. Mr. Bogomolny and Mr. Domenik have informed the Company that they each intend to tender a portion of the Shares beneficially owned by them. EMCORE's remaining directors and executive officers have advised the Company that they do not currently intend to tender Shares in the Offer. The equity ownership of EMCORE's directors, executive officers and affiliates who do not tender their Shares in the Offer will proportionately increase as a percentage of EMCORE's outstanding common stock following the consummation of the Offer. See Section 11 of the Offer to Purchase.

        For your information and for forwarding to those of your clients for whom you hold Shares registered in your name or in the name of your nominee, we are enclosing the following documents:

        1.     The Offer to Purchase;

        2.     The Letter of Transmittal for your use and for the information of your clients, including an IRS Form W-9;

        3.     A letter to clients that you may send to your clients for whose accounts you hold Shares registered in your name or in the name of your nominee, with space provided for obtaining such clients' instructions with regard to the Offer;

        4.     Notice of Guaranteed Delivery with respect to Shares, to be used to accept the Offer if certificates representing your clients' Share certificates are not immediately available or cannot be delivered to you to be further delivered to the Depositary prior to the Expiration Date (or the

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procedures for book-entry transfer cannot be completed on a timely basis), or if time will not permit all required documents, including a properly completed and duly executed Letter of Transmittal, to reach the Depositary prior to the Expiration Date; and

        5.     A return envelope addressed to American Stock Transfer & Trust Company, LLC, as Depositary for the Offer.

        YOUR PROMPT ACTION IS REQUESTED. WE URGE YOU TO CONTACT YOUR CLIENTS AS PROMPTLY AS POSSIBLE. PLEASE NOTE THAT THE OFFER AND WITHDRAWAL RIGHTS EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON MONDAY, JUNE 15, 2015, UNLESS THE OFFER IS EXTENDED.

        For Shares to be tendered properly pursuant to the Offer, the certificates for such Shares, or confirmation of receipt of such Shares pursuant to the procedure for book-entry transfer set forth in Section 3 of the Offer to Purchase, together with (a) a properly completed and duly executed Letter of Transmittal including any required signature guarantees and any documents required by the Letter of Transmittal or (b) an Agent's Message (as described in Section 3 of the Offer to Purchase) in the case of a book-entry transfer, must be received before 5:00 P.M., New York City time, on Monday, June 15, 2015 by the Depositary at one of its addresses set forth on the back cover of the Offer to Purchase, or the tendering shareholder must, prior to the Expiration Date, comply with the guaranteed delivery procedure set forth in the Offer to Purchase.

        EMCORE will not pay any fees or commissions to brokers, dealers, commercial banks, trust companies or other nominees (other than fees to the Dealer Manager and the Information Agent, as described in Section 16 of the Offer to Purchase) for soliciting tenders of Shares pursuant to the Offer. EMCORE will, however, upon request, reimburse brokers, dealers, commercial banks, trust companies or other nominees for customary mailing and handling expenses incurred by them in forwarding the Offer to Purchase, the Letter of Transmittal and related materials to the beneficial owners of Shares held by them as a nominee or in a fiduciary capacity. No broker, dealer, commercial bank, trust company or other nominee has been authorized to act as the agent of EMCORE, the Dealer Manager, the Information Agent or the Depositary for purposes of the Offer. EMCORE will pay or cause to be paid all stock transfer taxes, if any, on its purchase of the Shares except as otherwise provided in the Offer to Purchase or Instruction 7 in the Letter of Transmittal.

        Any questions or requests for assistance may be directed to the Dealer Manager or the Information Agent at their respective telephone numbers and addresses set forth on the back cover of the Offer to Purchase. You may request additional copies of enclosed materials and direct questions and requests for assistance to the Information Agent, MacKenzie Partners, Inc. toll-free at (800) 322-2885 or (212) 929-5500 (collect).

Very truly yours,

B. Riley & Co., LLC

Enclosures

        NOTHING CONTAINED IN THIS DOCUMENT OR IN THE ENCLOSED DOCUMENTS WILL MAKE YOU OR ANY OTHER PERSON AN AGENT OF EMCORE, THE DEALER MANAGER, THE INFORMATION AGENT OR THE DEPOSITARY OR ANY AFFILIATE OF ANY OF THE FOREGOING, OR AUTHORIZE YOU OR ANY OTHER PERSON TO USE ANY DOCUMENT OR MAKE ANY STATEMENT ON BEHALF OF ANY OF THEM IN CONNECTION WITH THE OFFER OTHER THAN THE DOCUMENTS ENCLOSED AND THE STATEMENTS CONTAINED IN THOSE DOCUMENTS.

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Exhibit (a)(1)(D)

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Exhibit (a)(1)(E)

Offer to Purchase for Cash
by
EMCORE CORPORATION
of
Up to $45,000,000 of Shares of Its Common Stock
at a Purchase Price Not Greater than $6.75 per Share
Nor Less than $6.25 per Share

May 15, 2015

To Our Clients:

        Enclosed for your consideration are the Offer to Purchase, dated May 15, 2015 (the "Offer to Purchase"), and related Letter of Transmittal (the "Letter of Transmittal", which together with the Offer to Purchase, as they may be amended or supplemented from time to time, constitute the "Offer") in connection with the offer by EMCORE Corporation, a New Jersey corporation ("EMCORE"), to purchase shares of its common stock, no par value per share (the "Shares") up to an aggregate purchase price of $45 million. EMCORE will purchase Shares at a price not greater than $6.75 per Share nor less than $6.25 per Share, net to the seller in cash, less any applicable withholding taxes and without interest, upon the terms and subject to the conditions described in the Offer to Purchase and related Letter of Transmittal. Capitalized terms used herein and not defined herein shall have the meanings given to them in the Offer to Purchase. The description of the Offer in this letter is only a summary and is qualified by all of the terms and conditions of the Offer set forth in the Offer to Purchase and the Letter of Transmittal.

        EMCORE will, upon the terms and subject to the conditions of the Offer, determine a single per Share price that it will pay for Shares properly tendered and not properly withdrawn from the Offer, taking into account the number of Shares so tendered and the prices specified by tendering shareholders. EMCORE will select the lowest purchase price, not greater than $6.75 per Share nor less than $6.25 per Share, that will allow it to purchase Shares having an aggregate purchase price of $45 million, or a lower aggregate purchase price depending on the number of Shares properly tendered and not properly withdrawn (such purchase price, the "Final Purchase Price"). If, based on the Final Purchase Price, Shares having an aggregate purchase price of less than $45 million are properly tendered and not properly withdrawn, EMCORE will buy all Shares properly tendered and not properly withdrawn, subject to the terms and conditions of the Offer. All Shares properly tendered prior to the Expiration Time at prices at or below the Final Purchase Price and not properly withdrawn will be purchased in the Offer at the Final Purchase Price, upon the terms and subject to the conditions of the Offer, including the "odd lot" priority, proration and conditional tender provisions described in the Offer to Purchase. Under no circumstances will interest be paid on the purchase price for the Shares, even if there is a delay in making such payment. All Shares acquired in the Offer will be acquired at the Final Purchase Price. EMCORE reserves the right, in its sole discretion, to change the per Share purchase price range and to increase or decrease the aggregate purchase price payable for Shares sought in the Offer, subject to applicable law. EMCORE may increase the aggregate purchase price payable for Shares purchased in the Offer and thereby increase the number of Shares accepted for payment in the Offer by up to 2% of the outstanding Shares without amending or extending the Offer.

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        EMCORE reserves the right, in its sole discretion, to terminate the Offer upon the occurrence of certain conditions more specifically described in Section 7 of the Offer to Purchase, or to amend the Offer in any respect, subject to applicable law.

        Upon the terms and subject to the conditions of the Offer, if, based on the Final Purchase Price, Shares having an aggregate purchase price in excess of $45 million (or such greater aggregate purchase price as EMCORE may elect, subject to applicable law) have been properly tendered at prices at or below the Final Purchase Price and not properly withdrawn before the Expiration Time, EMCORE will purchase such Shares in the following order of priority: (i) EMCORE will purchase all Shares properly tendered and not properly withdrawn by any holder of an "odd lot" of less than 100 Shares who tenders all Shares owned beneficially or of record by such odd lot holder at a price at or below the Final Purchase Price (tenders of less than all of the Shares owned by such odd lot holder will not qualify for this preference) and who completes the section captioned "Odd Lots" in the Letter of Transmittal; (ii) after the purchase of all of the Shares properly tendered at or below the Final Purchase Price and not properly withdrawn by odd lot holders, EMCORE will purchase all other Shares properly tendered at or below the Final Purchase Price on a pro rata basis (excluding Shares subject to conditional tenders for which the condition was not initially satisfied) with appropriate adjustment to avoid purchases of fractional Shares; and (iii) only if necessary to permit EMCORE to purchase Shares having an aggregate purchase price of $45 million (or such greater aggregate purchase price as EMCORE may elect, subject to applicable law), EMCORE will purchase Shares conditionally tendered (for which the condition was not initially satisfied) at or below the Final Purchase Price, by random lot, to the extent feasible. To be eligible for their Shares to be purchased by random lot, shareholders whose Shares are conditionally tendered must have tendered all of their Shares. As a result of the foregoing priorities applicable to the purchase of Shares tendered, it is possible that fewer than all Shares tendered by a shareholder will be purchased or that, if a tender is conditioned upon the purchase of a specified number of Shares, none of those Shares will be purchased even though such Shares were tendered at prices at or below the Final Purchase Price. Shares tendered at prices greater than the Final Purchase Price and Shares not purchased because of proration or conditional tenders will be returned to the tendering shareholders at EMCORE's expense promptly after the Expiration Time. See Section 1, Section 3 and Section 5 of the Offer to Purchase.

        The Offer is not conditioned on any minimum number of Shares being tendered. The Offer is, however, subject to certain other conditions. See Section 7 of the Offer to Purchase.

        EMCORE's directors and executive officers are entitled to participate in the Offer on the same basis as all other shareholders. Mr. Becker has informed the Company that Becker Drapkin Management, L.P. intends to tender an amount of Shares during the Offer that will result in its percentage ownership of the Company following the Expiration Date of the Offer remaining substantially equivalent to its percentage ownership of the Company immediately preceding the Offer. Mr. Bogomolny and Mr. Domenik have informed the Company that they each intend to tender a portion of the Shares beneficially owned by them. EMCORE's remaining directors and executive officers have advised the Company that they do not currently intend to tender Shares in the Offer. The equity ownership of EMCORE's directors, executive officers and affiliates who do not tender their Shares in the Offer will proportionately increase as a percentage of EMCORE's outstanding common stock following the consummation of the Offer. See Section 11 of the Offer to Purchase.

        We are the owner of record of Shares held for your account. As such, we are the only ones who can tender your Shares, and then only pursuant to your instructions. WE ARE SENDING YOU THE LETTER OF TRANSMITTAL FOR YOUR INFORMATION ONLY; YOU CANNOT USE IT TO TENDER SHARES THAT WE HOLD FOR YOUR ACCOUNT.

        Please instruct us as to whether you wish us to tender any or all of the Shares that we hold for your account on the terms and subject to the conditions of the Offer.

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        Please note the following:

        1.     You may tender your Shares at prices not greater than $6.75 per Share nor less than $6.25 per Share, as indicated in the attached Instruction Form, net to you in cash, less applicable withholding taxes and without interest.

        2.     You should consult with your broker or other financial or tax advisors on the possibility of designating the priority in which your Shares will be purchased in the event of proration.

        3.     The Offer and withdrawal rights will expire at 5:00 P.M., New York City time, on Monday, June 15, 2015 unless EMCORE extends the Offer.

        4.     The Offer is for up to $45 million in aggregate purchase price of Shares. At the maximum Final Purchase Price of $6.75 per Share, EMCORE could purchase 6,666,666 Shares if the Offer is fully subscribed (representing approximately 20.64% of the Shares outstanding as of May 1, 2015). At the minimum Final Purchase Price of $6.25 per Share, EMCORE could purchase 7,200,000 Shares if the Offer is fully subscribed (representing approximately 22.29% of the Shares outstanding as of May 1, 2015).

        5.     Tendering shareholders who are tendering Shares held in their name or who tender their Shares directly to the Depositary will not be obligated to pay any brokerage commissions or fees to EMCORE or to the Dealer Manager, solicitation fees, or, except as set forth in the Offer to Purchase and the Letter of Transmittal, stock transfer taxes on EMCORE's purchase of Shares under the Offer.

        6.     If you wish to tender portions of your Shares at different prices, you must complete a separate Instruction Form for each price at which you wish to tender each such portion of your Shares. We must submit separate Letters of Transmittal on your behalf for each price you will accept for each portion tendered.

        7.     If you are an odd lot holder and you instruct us to tender on your behalf all such Shares at or below the purchase price before the Expiration Time and complete the section captioned "Odd Lots" on the attached Instruction Form, EMCORE will accept all such Shares for purchase before proration, if any, of the purchase of other Shares properly tendered at or below the Final Purchase Price and not properly withdrawn.

        8.     If you wish to condition your tender upon the purchase of all Shares tendered or upon EMCORE's purchase of a specified minimum number of the Shares which you tender, you may elect to do so and thereby avoid possible proration of your tender. EMCORE's purchase of Shares from all tenders that are so conditioned will be determined by random lot. To elect such a condition, complete the section entitled "Conditional Tender" in the attached Instruction Form.

        YOUR PROMPT ACTION IS REQUESTED. YOUR INSTRUCTION FORM SHOULD BE FORWARDED TO US IN AMPLE TIME TO PERMIT US TO SUBMIT A TENDER ON YOUR BEHALF BEFORE THE EXPIRATION TIME. PLEASE NOTE THAT THE OFFER AND WITHDRAWAL RIGHTS EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON MONDAY, JUNE 15, 2015, UNLESS THE OFFER IS EXTENDED.

        If you wish to have us tender any or all of your Shares, please so instruct us by completing, executing, detaching and returning to us the attached Instruction Form. If you authorize us to tender your Shares, we will tender all such Shares unless you specify otherwise on the attached Instruction Form.

        The Offer is being made solely pursuant to the Offer to Purchase and the Letter of Transmittal and is being made to all record holders of Shares. The Offer is not being made to, nor will tenders be accepted from or on behalf of, holders of Shares residing in any jurisdiction within the United Sates in which the making of the Offer or acceptance thereof would not be in compliance with the securities, blue sky or other laws of such jurisdiction.

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INSTRUCTION FORM

        The undersigned acknowledge(s) receipt of your letter and the enclosed Offer to Purchase, dated May 15, 2015 (the "Offer to Purchase"), and the related Letter of Transmittal (the "Letter of Transmittal", which together with the Offer to Purchase, as they may be amended and supplemented from time to time, constitute the "Offer"), in connection with the offer by EMCORE Corporation, a New Jersey corporation ("EMCORE"), to purchase shares of its common stock, no par value per share (the "Shares") for cash up to an aggregate purchase price of $45 million, at a price not greater than $6.75 per Share nor less than $6.25 per Share, net to the seller in cash, less any applicable withholding taxes and without interest.

        The undersigned hereby instruct(s) you to tender to EMCORE the number of Shares indicated below or, if no number is specified, all Shares that you hold for the account of the undersigned, at the price per Share indicated below, upon the terms and subject to the conditions of the Offer.

        Aggregate Number Of Shares To Be Tendered By You For The Account Of The Undersigned:                      Shares.

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PRICE (IN DOLLARS) PER SHARE AT WHICH SHARES ARE BEING TENDERED
(See Instruction 5 of the Letter of Transmittal)

THE UNDERSIGNED IS TENDERING SHARES AS FOLLOWS (CHECK ONLY ONE BOX UNDER (1) OR (2) BELOW):

1.

SHARES TENDERED AT PRICE DETERMINED UNDER THE OFFER

        By checking the box below INSTEAD OF ONE OF THE BOXES UNDER "Shares Tendered At Price Determined By Shareholder," the undersigned hereby tenders Shares at the purchase price as shall be determined by EMCORE in accordance with the terms of the Offer.

o

The undersigned wants to maximize the chance that EMCORE will accept for payment all of the Shares the undersigned is tendering (subject to the possibility of proration). Accordingly, by checking this box instead of one of the price boxes below, the undersigned hereby tenders Shares at, and is willing to accept, the purchase price determined by EMCORE in accordance with the terms of the Offer. The undersigned understands that this action will result in the undersigned's Shares being deemed to be tendered at the price of $6.25 per Share for purposes of determining the Final Purchase Price. This may effectively lower the Final Purchase Price and could result in the undersigned receiving the minimum per Share price of $6.25.

2.

SHARES TENDERED AT PRICE DETERMINED BY SHAREHOLDER

        By checking ONE of the following boxes INSTEAD OF THE BOX UNDER "Shares Tendered At Price Determined Under The Offer," the undersigned hereby tenders Shares at the price checked. The undersigned understands that this action could result in EMCORE purchasing none of the Shares tendered hereby if the purchase price determined by EMCORE for the Shares is less than the price checked below.

CHECK ONLY ONE BOX UNDER (1) OR (2) ABOVE. IF MORE THAN ONE BOX IS CHECKED ABOVE OR IF NO BOX IS CHECKED, THERE IS NO PROPER TENDER OF SHARES.

        A SHAREHOLDER DESIRING TO TENDER SHARES AT MORE THAN ONE PRICE MUST COMPLETE A SEPARATE INSTRUCTION FORM FOR EACH PRICE AT WHICH SHARES ARE TENDERED. THE SAME SHARES CANNOT BE TENDERED AT MORE THAN ONE PRICE, UNLESS PREVIOUSLY PROPERLY WITHDRAWN AS PROVIDED IN SECTION 4 OF THE OFFER TO PURCHASE.

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CONDITIONAL TENDER
(See Instruction 14 of the Letter of Transmittal)

        A shareholder may tender Shares subject to the condition that a specified minimum number of the shareholder's Shares tendered pursuant to the Letter of Transmittal must be purchased if any Shares tendered are purchased, as described in the Offer to Purchase, particularly in Section 6 of the Offer to Purchase. Unless at least the minimum number of Shares indicated below is purchased by EMCORE pursuant to the terms of the Offer, none of the Shares tendered will be purchased. It is the tendering shareholder's responsibility to calculate the minimum number of Shares that must be purchased if any are purchased, and EMCORE urges shareholders to consult their financial and tax advisors before completing this section. Unless this box has been checked and a minimum number of Shares specified, the tender will be deemed unconditional.

o

The minimum number of Shares that must be purchased, if any are purchased, is:                      Shares.

        If, because of proration, the minimum number of Shares designated will not be purchased, EMCORE may accept conditional tenders by random lot, if necessary. However, to be eligible for purchase by random lot, the tendering shareholder must have tendered all of his or her Shares and checked this box:

o

The tendered Shares represent all Shares held by the undersigned.

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ODD LOTS
(See Instruction 15 of the Letter of Transmittal)

        To be completed ONLY if Shares are being tendered by or on behalf of a person owning, beneficially or of record, as of the close of business on the date set forth on the signature page hereto, and who continues to own, beneficially or of record, as of the Expiration Time, an aggregate of fewer than 100 Shares. The odd lot preference is not available for partial tenders or to beneficial or record holders of an aggregate of 100 or more Shares, even if these holders have separate accounts or certificates representing fewer than 100 Shares.

        The undersigned is either (check one box):

o

the beneficial or record owner of an aggregate of fewer than 100 Shares, all of which are being tendered; or



o

a broker, dealer, commercial bank, trust company, or other nominee that (a) is tendering for the beneficial owner(s), Shares with respect to which it is the record holder, and (b) believes, based upon representations made to it by the beneficial owner(s), that each such person is the beneficial owner of an aggregate of fewer than 100 Shares and is tendering all of the Shares beneficially owned by each such person.

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        The method of delivery of this document is at the election and risk of the tendering shareholder. If delivery is by mail, then registered mail with return receipt requested, properly insured, is recommended. In all cases, sufficient time should be allowed to ensure timely delivery.

        EMCORE's board of directors has approved making the Offer. However, neither EMCORE, nor any member of its board of directors, the Dealer Manager, the Information Agent or the Depositary makes any recommendation to shareholders as to whether they should tender or refrain from tendering their Shares or as to the purchase price or purchase prices at which any shareholder may choose to tender Shares. Neither EMCORE, nor any member of its board of directors, the Dealer Manager, the Information Agent or the Depositary has authorized any person to make any recommendation with respect to the Offer. Shareholders should carefully evaluate all information in the Offer to Purchase, consult their financial and tax advisors and make their own decisions about whether to tender Shares and, if so, how many Shares to tender and the purchase price or purchase prices at which to tender.

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INSTRUCTION FORM
CONDITIONAL TENDER (See Instruction 14 of the Letter of Transmittal)
ODD LOTS (See Instruction 15 of the Letter of Transmittal)



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Exhibit (a)(1)(F)

May 15, 2015

Dear Participant in the EMCORE Corporation 401(k) Plan:

        You are being sent the enclosed tender offer materials because our records reflect that, as a participant in the EMCORE Corporation 401(k) Plan (the "Plan"), all or a portion of your individual account is invested in the EMCORE Corporation Company Stock Fund (the "Stock Fund"). The tender offer materials describe an offer by EMCORE Corporation ("EMCORE" or the "Company") to purchase shares of its common stock, no par value per share (the "Shares"), up to an aggregate purchase price of $45 million, at a price not greater than $6.75 nor less than $6.25 per Share, net to the seller in cash, less any applicable withholding taxes and without interest, upon the terms and subject to the conditions described in the Offer to Purchase (the "Offer").

        As described below, you have the right to instruct Prudential Retirements, as Trustee of the Plan (the "Trustee"), concerning whether to tender Shares related to your individual account under the Plan. You will need to complete the enclosed Direction Form and return it to EMCORE's Depositary, American Stock Transfer & Trust Company (the "Depositary"), in the enclosed return envelope so that it is RECEIVED by 5:00 p.m., New York City Time, on Tuesday, June 9, 2015, unless the Offer is extended, in which case the deadline for receipt of instructions will, to the extent feasible, be four business days prior to the expiration date of the Offer. If you do not complete the enclosed Direction Form and return it to the Depositary on a timely basis, you will be deemed to have elected not to participate in the Offer and no Shares related to your individual account under the Plan will be tendered.

        The remainder of this letter summarizes the transaction, your rights under the Plan, and the procedures for completing and submitting the Direction Form. You should also review the more detailed explanation provided in the Offer to Purchase, dated May 15, 2015 (the "Offer to Purchase"), enclosed with this letter.

BACKGROUND

        EMCORE has made an Offer to purchase up to an aggregate purchase price of $45 million of its Shares from its shareholders at a price not more than $6.75 and not less than $6.25 per Share, upon the terms and subject to the conditions set forth in the enclosed Offer to Purchase. EMCORE will select the lowest purchase price (in increments of $0.10) that will allow it to purchase up to $45 million of its Shares. Subject to the terms and conditions of the Offer as set forth in the Offer to Purchase, if the total value of Shares tendered is less than or equal to $45 million, EMCORE will purchase all Shares that are properly tendered and not withdrawn. All Shares acquired in the Offer will be acquired at the same purchase price regardless of whether the shareholder tendered at a lower price.

        The enclosed Offer to Purchase sets forth the terms and conditions of the Offer and is being provided to all of EMCORE's shareholders. To understand the Offer fully and for a more complete description of the terms and conditions of the Offer, you should carefully read the entire Offer to Purchase.

        The Offer extends to the Shares held by the Plan. As of December 31, 2014, the Plan held approximately 678,391.574 Shares. Only Prudential Retirements, as Trustee of the Plan, can tender these Shares in the Offer. Nonetheless, as a participant under the Plan, you have the right to direct the Trustee whether or not to tender some or all of the Shares attributable to your individual account under the Plan, and at what price or prices. Unless otherwise required by applicable law, the Trustee will tender Shares attributable to participant accounts in accordance with participant instructions and the Trustee will not tender Shares attributable to participant accounts for which it does not receive timely instructions. If you do not complete the enclosed Direction Form and return it to the Depositary on a timely basis, you will be deemed to have elected not to participate in the Offer and no Shares attributable to your Plan account will be tendered.

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LIMITATIONS ON FOLLOWING YOUR DIRECTION

        The enclosed Direction Form allows you to specify the percentage of the Shares attributable to your account that you wish to tender and the price or prices at which you want to tender Shares attributable to your account. As detailed below, when the Trustee tenders Shares on behalf of the Plan, it may be required to tender Shares on terms different than those set forth on your Direction Form.

        The Employee Retirement Income Security Act of 1974, as amended ("ERISA"), prohibits the sale of Shares to EMCORE for less than "adequate consideration," which is defined by ERISA for a publicly traded security as the prevailing market price on a national securities exchange. The Trustee will determine "adequate consideration," based on the prevailing or closing market price of the Shares on the NASDAQ Global Market, on or about the date the Shares are tendered by the Trustee (the "prevailing market price"). Accordingly, depending on the prevailing market price of the Shares on such date, the Trustee may be unable to follow participant directions to tender Shares to EMCORE at certain prices within the offered range. The Trustee will tender or not tender Shares as follows:

•

If the prevailing market price is greater than the maximum tender price offered by EMCORE ($6.75 per Share), notwithstanding your direction to tender Shares in the Offer, the Shares will not be tendered.



•

If the prevailing market price is lower than the price at which you direct Shares be tendered, the Trustee will follow your direction both as to percentage of Shares to tender and as to the price at which such Shares are tendered.



•

If the prevailing market price is greater than the price at which you direct the Shares be tendered but within the range of $6.25 to $6.75, the Trustee will follow your direction regarding the percentage of Shares to be tendered, but only with respect to your Shares which were tendered at a price equal to or greater than the prevailing market price.



•

If the prevailing market price is within the range of $6.25 to $6.75, for all Shares directed to be tendered at the "per Share purchase price to be determined under the tender offer," the Trustee will tender such Shares at the lowest tender price that is not less than the prevailing market price.

        Unless otherwise required by applicable law, the Trustee will not tender Shares attributable to participant accounts for which it has not received a completed Direction Form, or for which it has received a direction not to tender pursuant to the Direction Form. The Trustee makes no recommendation as to whether to direct the tender of Shares or whether to refrain from directing the tender of Shares. EACH PARTICIPANT OR BENEFICIARY MUST MAKE HIS OR HER OWN DECISIONS.

CONFIDENTIALITY

        To assure the confidentiality of your decision, the Depositary, American Stock Transfer & Trust Company, LLC and their affiliates or agents will tabulate the Direction Forms and return aggregate results to the Trustee. Neither the Trustee nor the Depositary will make your individual direction available to EMCORE.

PROCEDURE FOR DIRECTING THE TRUSTEE

        Enclosed is a Direction Form which should be completed and returned to the Depositary. For purposes of the final tabulation, the Trustee will apply your instructions to the number of Shares attributable to your account as of Tuesday, June 9, 2015, or as of a later date if the Offer is extended.

        If you do not properly complete the Direction Form or do not return it by the deadline specified, such Shares will be considered NOT TENDERED.

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        To properly complete your Direction Form, you must do the following:

•

either (1) check the box in the section captioned "Shares Tendered At Price Determined Under The Offer" in order to maximize the chance of having EMCORE accept for payment all of the Shares tendered (subject to the possibility of proration) or (2) check the box indicating the price per Share at which such shareholder is tendering Shares under "Shares Tendered At Price Determined by Shareholder." Selecting option (1) could result in the shareholder receiving the minimum price per Share of $6.25. ONLY ONE BOX UNDER (1) OR (2) MAY BE CHECKED. IF MORE THAN ONE BOX IS CHECKED OR IF NO BOX IS CHECKED, THERE IS NO PROPER TENDER OF SHARES. A SHAREHOLDER WISHING TO TENDER PORTIONS OF SUCH SHAREHOLDER'S SHARE HOLDINGS AT DIFFERENT PRICES MUST COMPLETE A SEPARATE DIRECTION FORM FOR EACH PRICE AT WHICH SUCH SHAREHOLDER WISHES TO TENDER EACH SUCH PORTION OF SUCH SHAREHOLDER'S SHARE HOLDINGS.



•

Date and sign the Direction Form in the space provided.



•

Return the Direction Form in the enclosed return envelope so that it is received by the Depositary at the address listed on the Direction Form no later than 5:00 P.M., New York City Time, on Tuesday, June 9, 2015, unless the Offer is extended, in which case, to the extent feasible, the participant deadline shall be four business days prior to the expiration date of the Offer.

        Your direction pursuant to your Direction Form will be deemed irrevocable unless withdrawn by 5:00 p.m., New York City Time, on Tuesday, June 9, 2015, unless the Offer is extended by EMCORE. In order to make an effective withdrawal, you must submit a new Direction Form which may be obtained by calling the Information Agent, MacKenzie Partners, Inc. (the "Information Agent"), toll-free, at (800) 322-2885 or (212) 929-5500 (collect). Upon receipt of a new, completed and signed Direction Form, your previous direction under your previously submitted Direction Form will be deemed canceled. You may direct the re-tendering of any Shares attributable to your individual account by obtaining an additional Direction Form from the Information Agent and repeating the previous instructions for directing tender as set forth in this letter.

        After the deadline above for returning the Direction Form to the Depositary, the Depositary and their affiliates or agents will complete the tabulation of all directions. The Trustee will then tender the appropriate number of Shares on behalf of the Plan.

        Subject to the satisfaction of the conditions described in the Offer to Purchase, EMCORE will purchase up to $45 million of Shares that are properly tendered through the Offer. If the total value of Shares tendered exceeds $45 million, the Shares tendered pursuant to the Offer may be subject to proration, as described in the Offer to Purchase. Any Shares attributable to your account that are not purchased in the Offer will remain allocated to your individual account under the Plan.

        The conditional tender of Shares described in the Offer to Purchase will not apply to participants in the Plan.

EFFECT OF TENDER ON YOUR ACCOUNT

        In the event that you tender Shares you hold in the 401(k) Company Stock Fund pursuant to the Offer, you will be unable to make transactions in those Shares during the period between 5:00 p.m. New York City time on Tuesday June 9, 2015, and the expiration of the guaranteed delivery period which is expected to occur during the week of June 15, 2015. This is to allow sufficient time for the Depositary to process the tender and any applicable proration of the Shares.

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        If you have any questions concerning your account, you should contact Prudential Retirements at 1-800-778-2100 or online at www.prudential.com/online/retirement.

INVESTMENT OF PROCEEDS

        For any Shares in the Plan that are tendered and purchased by EMCORE, EMCORE will pay cash to the Plan. Individual participants in the plan will not, however, receive any cash tender proceeds directly. Should you elect to tender your shares, the Trustee will allocate, on a pro-rata basis, the proceeds from this offer across your pre-determined investment selections (excluding the Company Stock Fund). These allocations will be made in accordance with your investment elections in effect on the date that the Trustee receives the proceeds from this action. If you have made no such election, the proceeds will be invested into the qualified default investment alternative of the Plan.

SHARES OUTSIDE THE PLAN

        If you hold Shares outside of the Plan, you will receive, under separate cover, Offer materials to be used to tender those Shares. Those Offer materials may not be used to direct Prudential Retirements to tender or not tender the Shares attributable to your individual account under the Plan. Likewise, the tender of Shares attributable to your individual account under the Plan will not be effective with respect to Shares you hold outside of the Plan. The direction to tender or not tender Shares attributable to your individual account under the Plan may only be made in accordance with the procedures in this letter. Similarly, the enclosed Direction Form may not be used to tender Shares held outside of the Plan.

TAX CONSEQUENCES

        While you will not recognize any immediate tax gain or loss as a result of the tender and sale of any Shares attributable to your account in the Plan, the tax treatment of future distributions from the Plan may be impacted. Tender offer proceeds will be subject to all applicable taxes at the time you receive a distribution from the Plan. We encourage you to consult your tax advisor concerning your decision to participate in the Offer and possible tax ramifications.

FURTHER INFORMATION

        If you require additional information concerning the procedure to tender Shares attributable to your individual account under the Plan, please contact Prudential Retirements at 1-800-778-2100. If you require additional information concerning the terms and conditions of the Offer, please call MacKenzie Partners, Inc., the information agent of the Offer, toll-free, at (800) 322-2885 or (212) 929-5500 (collect).

Sincerely,

Prudential Retirements

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DIRECTION FORM
For Tender of Shares of Common Stock of

EMCORE CORPORATION

At a Purchase Price Not Greater than $6.75 per Share
Nor Less than $6.25 per Share
Pursuant to the Offer to Purchase Dated May 15, 2015

        The undersigned acknowledge(s) receipt of the instruction letter and the enclosed Offer to Purchase, dated May 15, 2015, in connection with the Offer by EMCORE Corporation, a New Jersey corporation ("EMCORE" or the "Company"), to purchase for cash up to $45,000,000 of shares of its common stock, no par value per share (the "Shares"), net to the seller in cash, less any applicable withholding taxes and without interest.

        This Direction Form will instruct the Trustee to tender to EMCORE the percentage of Shares indicated below or, if no percentage is indicated below, all Shares which are held by the Trustee and for the account of the undersigned will be tendered, upon the terms and subject to the conditions set forth in the Offer. If you would like to retain the Shares you own, you do not need to take any action.

I wish to have the Trustee tender        % of the Shares allocable to my interest in the 401(k) Company Stock Fund of the EMCORE Corporation 401(k) Retirement Savings Plan (please enter the applicable percentage—not to exceed 100%).

Unless otherwise indicated above by filling in a percentage less than 100%, if you send this Instruction Form to the Depositary, it will be assumed that all Shares allocable to your interest in the 401(k) Company Stock Fund are to be tendered.

The Depositary for the Offer is:

        DELIVERY OF THIS DIRECTION FORM TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY TO THE DEPOSITARY.

        You must sign this Direction Form in the appropriate space provided therefor below. The instructions set forth in this Direction Form should be read carefully before you tender any of your Shares into the Offer.

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PRICE (IN DOLLARS) PER SHARE AT WHICH SHARES ARE BEING TENDERED

        THE UNDERSIGNED IS TENDERING SHARES AS FOLLOWS (CHECK ONLY ONE BOX UNDER (1) OR (2) BELOW):

1.

SHARES TENDERED AT PRICE DETERMINED UNDER THE OFFER

        By checking the box below INSTEAD OF ONE OF THE BOXES UNDER "Shares Tendered At Price Determined By Shareholder," the undersigned hereby tenders Shares at the purchase price as shall be determined by EMCORE in accordance with the terms of the Offer.

o

The undersigned wants to maximize the chance that EMCORE will accept for payment all of the Shares the undersigned is tendering (subject to the possibility of proration). Accordingly, by checking this box instead of one of the price boxes below, the undersigned hereby tenders Shares at, and is willing to accept, the purchase price determined by EMCORE in accordance with the terms of the Offer. The undersigned understands that this action will result in the undersigned's Shares being deemed to be tendered at the minimum price of $6.25 per Share for purposes of determining the Final Purchase Price. This may effectively lower the Final Purchase Price and could result in the undersigned receiving the minimum price of $6.25 per Share.

2.

SHARES TENDERED AT PRICE DETERMINED BY SHAREHOLDER

        By checking ONE of the following boxes INSTEAD OF THE BOX UNDER "Shares Tendered At Price Determined Under The Offer," the undersigned hereby tenders Shares at the price checked. The undersigned understands that this action could result in EMCORE purchasing none of the Shares tendered hereby if the purchase price determined by EMCORE for the Shares is less than the price checked below.

o    $6.25

o    $6.55

o    $6.35

o    $6.65

o    $6.45

o    $6.75

CHECK ONLY ONE BOX UNDER (1) OR (2) ABOVE. IF MORE THAN ONE BOX IS CHECKED ABOVE OR IF NO BOX IS CHECKED, THERE IS NO PROPER TENDER OF SHARES.

A SHAREHOLDER DESIRING TO TENDER SHARES AT MORE THAN ONE PRICE MUST COMPLETE A SEPARATE DIRECTION FORM FOR EACH PRICE AT WHICH SHARES ARE TENDERED. THE SAME SHARES CANNOT BE TENDERED, UNLESS PREVIOUSLY PROPERLY WITHDRAWN AS PROVIDED IN SECTION 4 OF THE OFFER TO PURCHASE, AT MORE THAN ONE PRICE.

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SIGN HERE

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Exhibit (a)(1)(F)

The Depositary for the Offer is
PRICE (IN DOLLARS) PER SHARE AT WHICH SHARES ARE BEING TENDERED
SIGN HERE