UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

SCHEDULE 13G
(Rule 13d-102)

IFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO

FILED PURSUANT TO RULE TO RULE 13d-2
(Amendment No. 2)*

QUEST RESOURCE CORPORATION

(Name of Issuer)

COMMON STOCK, PAR VALUE $0.001 PER SHARE

(Title of Class of Securities)

748349305

(CUSIP Number)

December 31, 2009

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

[ ] Rule 13d-1 (b)
[X] Rule 13d-1 (c)
[ ] Rule 13d-1 (d)

* The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act, but shall be subject to all other provisions of the Act (however, see the Notes.)

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CUSIP NO 748349305 SCHEDULE 13G PAGE 2 OF 10 PAGES
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1 Name of Reporting Person / IRS Identification Number:
 Advisory Research, Inc.

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2 Check the Appropriate Box if a Member of a Group (a) [X]
 (See Instructions) (b) [ ]

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3 SEC Use Only

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4 Citizenship or Place of Organization
 Delaware

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 Number of
 5 Sole Voting Power
 Shares 0 Shares
 -----------------------------------------------
 Beneficially
 6 Shared Voting Power
 Owned By 1,503,421 Shares
 -----------------------------------------------
 Each
 7 Dispositive Power
 Reporting 0 Shares
 -----------------------------------------------
 Person
 8 Shared Dispositive Power
 With 1,503,421 Shares
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9 Aggregate Amount Beneficially Owned by Each Reporting Person
 1,503,421 Shares

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10 Check if the Aggregate Amount in Row (9) Excludes Certain
 Shares [ ] (See Instructions)

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11 Percent of Class Represented by Amount in Row (9)
 4.7%

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12 Type of Reporting Person
 IA

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CUSIP NO 748349305 SCHEDULE 13G PAGE 3 OF 10 PAGES
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1 Name of Reporting Person / IRS Identification Number:
 Advisory Research Energy Fund, L.P.

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2 Check the Appropriate Box if a Member of a Group (a) [X]
 (See Instructions) (b) [ ]

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3 SEC Use Only

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4 Citizenship or Place of Organization
 Illinois

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 Number of
 5 Sole Voting Power
 Shares 0 Shares
 -----------------------------------------------
 Beneficially
 6 Shared Voting Power
 Owned By 0 Shares
 -----------------------------------------------
 Each
 7 Dispositive Power
 Reporting 0 Shares
 -----------------------------------------------
 Person
 8 Shared Dispositive Power
 With 0 Shares
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9 Aggregate Amount Beneficially Owned by Each Reporting Person
 0 Shares

------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes Certain
 Shares [ ] (See Instructions)

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11 Percent of Class Represented by Amount in Row (9)
 0.0%

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12 Type of Reporting Person
 PN

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CUSIP NO 748349305 SCHEDULE 13G PAGE 4 OF 10 PAGES
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1 Name of Reporting Person / IRS Identification Number:
 Advisory Research Micro Cap Value Fund, L.P.

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2 Check the Appropriate Box if a Member of a Group (a) [X]
 (See Instructions) (b) [ ]

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3 SEC Use Only

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4 Citizenship or Place of Organization
 Illinois

------------------------------------------------------------------

 Number of
 5 Sole Voting Power
 Shares 0 Shares
 -----------------------------------------------
 Beneficially
 6 Shared Voting Power
 Owned By 1,503,421 Shares
 -----------------------------------------------
 Each
 7 Dispositive Power
 Reporting 0 Shares
 -----------------------------------------------
 Person
 8 Shared Dispositive Power
 With 1,503,421 Shares
------------------------------------------------------------------
9 Aggregate Amount Beneficially Owned by Each Reporting Person
 1,503,421 Shares

------------------------------------------------------------------
10 Check if the Aggregate Amount in Row (9) Excludes Certain
 Shares [ ] (See Instructions)

------------------------------------------------------------------
11 Percent of Class Represented by Amount in Row (9)
 4.7%

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12 Type of Reporting Person
 PN

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CUSIP NO 748349305 SCHEDULE 13G PAGE 5 OF 10 PAGES
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Item 1 (a) Name of Issuer: Quest Resource Corporation
Item 1 (b) Name of Issuer's Principal Executive Offices:
 210 Park Avenue, Suite 2750
 Oklahoma City, Oklahoma 73102

Item 2 (a) Person Filing: Advisory Research, Inc.,
 Advisory Research Energy Fund, L.P. and
 Advisory Research Micro Cap Value Fund, L.P.

Item 2 (b) Address: 180 North Stetson St., Suite 5500
 Chicago, IL 60601

Item 2 (c) Citizenship: Advisory Research, Inc. - Delaware
 Advisory Research Energy Fund L.P. - Illinois
 Advisory Research Micro Cap Value Fund
 L.P.-Illinois


Item 2 (d) Title of Class of Securities:
 Common Stock, par value $0.001 per share
Item 2 (e) CUSIP Number: 748349305

Item 3 If this statement is filed pursuant to Rules
 13d-1(b) or 13d-2(b), check whether the person
 filing is a:

 (a) [ ] Broker or Dealer registered under Section
 15 of the Act

 (b) [ ] Bank as defined in Section 3(a)(6) of the
 Act
 (c) [ ] Insurance Company as defined in Section
 3(a)(19) of the Act

 (d) [ ] Investment Company registered under
 Section 8 of the Investment Company Act

 (e) [x] Investment Advisor in accordance with
 section 240.13d-1(b)(1)(ii)(E)

 (f) [ ] Employee Benefit Plan or Endowment Fund
 in accordance with section 240.13d-1(b)
 (1)(ii)(F)

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CUSIP NO 748349305 SCHEDULE 13G PAGE 6 OF 10 PAGES
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 (g) [ ] Parent Holding Company or Control Person in
 accordance with section 13d-1(b) (1)(ii)(G)

 (h) [ ] A savings association as defined in section
 3(b) of the Federal Deposit Insurance Act

 (i) [ ] A church plan that is excluded from the
 definition of an investment company under
 section 3(c)(14) of the Investment
 Company Act of 1940

 (j) [ ] Group, in accordance with 240.3d-1(b)(1)
 (ii)(J).

 **Advisory Research, Inc. is the investment
 adviser of Advisory Research Energy Fund, L.P.
 and Advisory Research Micro Cap Value Fund, L.P.

Item 4 Ownership

 Provide the following information regarding the
 aggregate number and percentage of the class of
 securities of the issuer identified in Item 1.

 (a) Amount Beneficially Owned:

 Advisory Research, Inc. - 1,503,421 Shares
 Advisory Research Energy Fund, L.P. - 0
 Advisory Research Micro Cap Value Fund, L.P. - 1,503,421

 (b) Percent of Class

 Advisory Research, Inc. - 4.7%
 Advisory Research Energy Fund, L.P. - 0.0%
 Advisory Research Micro Cap Value Fund, L.P. - 4.7%

 (c) Number of shares as to which reporting person has:

 (i) Sole power to vote or to direct the vote:

 Advisory Research, InC. - 0
 Advisory Research Energy Fund, L.P. - 0
 Advisory Research Micro Cap Value Fund, L.P. - 0

 (ii) Shared power to vote or to direct the vote:

 Advisory Research, Inc. - 1,503,421 Shares
 Advisory Research Energy Fund, L.P. - 0
 Advisory Research Micro Cap Value Fund, L.P. - 1,503,421

 (iii) Sole power to dispose or to direct the
 disposition of:

 Advisory Research, Inc. - 0
 Advisory Research Energy Fund, L.P. - 0
 Advisory Research Micro Cap Value Fund, L.P. - 0

 (iv) Shared power to dispose or to direct the
 disposition of:

 Advisory Research, Inc. - 1,503,421 Shares
 Advisory Research Energy Fund, L.P. - 0
 Advisory Research Micro Cap Value Fund, L.P. - 1,503,421

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CUSIP NO 748349305 SCHEDULE 13G PAGE 7 OF 10 PAGES
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Item 5 Ownership of Five Percent or Less of a Class:
 If this statement is being filed to report the fact that
 as of the date hereof the reporting person has ceased to
 be the beneficial owner of more than five percent of
 the class of securities, check the following [X]

Item 6 Ownership of More than Five Percent on Behalf of Another
 Person: If any other person is known to have the right
 to receive or the power to direct the receipt of
 dividends from, or the proceeds from the sale of, such
 securities, a statement to that effect should be
 included in response to this item and, if such
 interest relates to more than five percent of the
 class, such person should be identified. A listing of
 the shareholders of an investment company registered
 under the Investment Company Act of 1940 or the
 beneficiaries of employee benefit plan, pension fund
 or endowment fund is not required.

 Not Applicable

Item 7 Identification and Classification of the Subsidiary
 Which Acquired the Security being Reported on by the
 Parent Holding Company: If a parent holding company
 or control person has filed this schedule, pursuant to
 Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and
 attach an exhibit stating the identity and the Item
 3 classification of the relevant subsidiary. If a
 parent holding company or control person has filed
 this schedule pursuant to Rule 13d-1(c) or Rule
 13d-1(d), attach an exhibit stating the identifi-
 cation of the relevant subsidiary.

 Not Applicable

Item 8 Identification and Classification if Members of the
 Group: If a group has filed this schedule pursuant
 to ss.240.13d-1(b)(1)(ii)(J), so indicate under
 Item 3(j) and attach an exhibit stating the identity
 and Item 3 classification of each member of the
 group. If a group has filed this schedule pursuant
 to Rule 13d-1(c) or Rule 13d-1(d), attach an
 exhibit stating the identity of each member of the
 group.

 See Exhibit B

Item 9 Notice of Dissolution of Group: Notice of
 dissolution of a group may be furnished as an exhibit
 stating the date of the dissolution and that all
 further filings with respect to transactions in the
 security reported on will be filed, if required, by
 members of the group, in their individual capacity.
 See Item 5.

 Not Applicable

Item 10 Certification

 By signing below I certify that, to the best of my
 knowledge and belief, the securities referred to
 above were acquired and are held in the ordinary
 course of business and were not acquired and are
 not held for the purpose of or with the effect of
 changing or influencing the control of the issuer
 of such securities and were not acquired and are
 not held in connection with or as a participant
 in any transaction having such purposes or effect.

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CUSIP NO 748349305 SCHEDULE 13G PAGE 8 OF 10 PAGES
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 SIGNATURES

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

Date: January 8, 2010

 Advisory Research, Inc.

 /s/ Brien M. O'Brien
 ----------------------------------
 Name: Brien M. O'Brien
 Title: Chairman & CEO


 Advisory Research Energy Fund, L.P.

 By: Advisory Research, Inc., General Partner

 /s/ Brien M. O'Brien
 ----------------------------------
 Name: Brien M. O'Brien
 Title: Chairman & CEO


 Advisory Research Micro Cap Value Fund, L.P.

 By: Advisory Research, Inc., General Partner

 /s/ Brien M. O'Brien
 ----------------------------------
 Name: Brien M. O'Brien
 Title: Chairman & CEO

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CUSIP NO 748349305 SCHEDULE 13G PAGE 9 OF 10 PAGES
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 EXHIBIT A

 JOINT FILING AGREEMENT

The undersigned hereby agree to the joint filing on behalf of each
of them of a statement on Schedule 13G (including amendments
thereto) with respect to the Common Stock of Quest Resource
Corporation and that this Agreement be included as an Exhibit to
such joint filing. This Agreement may be executed in any number of
counterparts all of which taken together shall constitute one and
the same instrument.

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement
this 8th day of January 2010.

 Advisory Research, Inc.

 /s/ Brien M. O'Brien
 ----------------------------------
 Name: Brien M. O'Brien
 Title: Chairman & CEO


 Advisory Research Energy Fund, L.P.

 By: Advisory Research, Inc., General Partner

 /s/ Brien M. O'Brien
 ----------------------------------
 Name: Brien M. O'Brien
 Title: Chairman & CEO


 Advisory Research Micro Cap Value Fund, L.P.

 By: Advisory Research, Inc., General Partner

 /s/ Brien M. O'Brien
 ----------------------------------
 Name: Brien M. O'Brien
 Title: Chairman & CEO


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CUSIP NO 748349305 SCHEDULE 13G PAGE 10 OF 10 PAGES
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 EXHIBIT B


Advisory Research, Inc.
Advisory Research Energy Fund, L.P.
Advisory Research Micro Cap Value Fund, L.P.

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