GNVC Genvec, Inc.

GENVEC, INC. 2002 STOCK INCENTIVE PLAN

(Full titles of the plans)

Donald P. Lehr

President

GenVec, Inc.

910 Clopper Road, Suite 220N

Gaithersburg, MD 20878

(Name and address of Agent for service)

(240) 632-0740

(Telephone number, including area code, of agent for service)

Copy to:

Peter W. Smith

Corby J. Baumann

Thompson Hine LLP

335 Madison Avenue, 12th Floor

New York, New York 10017

Telephone: (212) 344-5680

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.  ☐

DEREGISTRATION OF UNSOLD SECURITIES

These Post-Effective Amendments relate to the following Registration Statements on Form S-8 (each, a “Registration Statement”, and collectively, the “Registration Statements”) filed by GenVec, Inc., a Delaware corporation (the “Company”), with the U.S. Securities and Exchange Commission:

These Post-Effective Amendments to the Registration Statements are being filed solely for the purpose of deregistering any and all securities registered under the Registration Statements that remain unsold.

On June 16, 2017, pursuant to an Agreement and Plan of Merger, dated as of January 24, 2017, by and among the Company, Intrexon Corporation, a Virginia corporation (“Intrexon”), and Intrexon GV Holding, Inc., a Delaware corporation and a wholly-owned subsidiary of Intrexon (“Merger Sub”), Merger Sub merged with and into the Company (the “Merger”), with the Company as the surviving corporation and a wholly-owned subsidiary of Intrexon.

As a result of the Merger, the Registrant has determined to terminate the offerings under the Registration Statements. Accordingly, the Registrant is filing these Post-Effective Amendments to the Registration Statements pursuant to Rule 478 under the Securities Act of 1933, as amended, to terminate the effectiveness of the Registration Statements, and, in accordance with the undertakings made by the Registrant in the Registration Statements, to remove from registration any and all of the securities previously registered under the Registration Statements that remain unsold as of the date hereof.

The Company hereby removes from registration the securities registered under the Registration Statements that remain unsold under the above listed Registration Statements as of the filing date of these Post-Effective Amendments.