FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0287 Expires: January 31, 2005 Estimated average burden hours per response... 0.5

(Print or Type Responses)

1. Name and Address of Reporting Person * MCALEENAN DONALD F   2. Issuer Name and Ticker or Trading Symbol Builders FirstSource, Inc. [BLDR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) SVP & General Counsel (Last) (First) (Middle) 2001 BRYAN STREET, SUITE 1600 3. Date of Earliest Transaction (Month/Day/Year) 07/26/2011 (Street) DALLAS, TX 75201 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
	Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.		SEC 1474 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Employee Stock Option (right to buy)

$ 3.15

07/26/2011

D(1)

236,714

(1)

01/16/2012

Common Stock

236,714

(1)

0

D

Employee Stock Option (right to buy)

$ 3.15

07/26/2011

A(1)

236,714

(1)

01/16/2022

Common Stock

236,714

(1)

236,714

D

Employee Stock Option (right to buy)

$ 3.15

07/26/2011

D(2)

46,295

(2)

02/27/2014

Common Stock

46,295

(2)

0

D

Employee Stock Option (right to buy)

$ 3.15

07/26/2011

A(2)

46,295

(2)

02/27/2024

Common Stock

46,295

(2)

46,295

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
MCALEENAN DONALD F 2001 BRYAN STREET SUITE 1600 DALLAS, TX 75201			SVP & General Counsel

Signatures

/s/ Donald F. McAleenan		07/27/2011
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The reported transactions involved an amendment of an outstanding option solely to extend the term, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The exercise price was not changed by the amendment. The option was originally granted on January 16, 2002 and was 20% vested on the date of grant and vested in 20% increments on each of September 1, 2002-2005.
(2)	The reported transactions involved an amendment of an outstanding option solely to extend the term, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The exercise price was not changed by the amendment. The option was originally granted on March 1, 2004 and vested based on the Corporation achieving specified performance targets as follows: (i) one-sixth on December 31, 2004, based on performance targets for 2004, (ii) one-sixth on December 31, 2005, based on performance targets for 2005, (iii) one-sixth on December 31, 2006, based on performance targets for 2006, and (iv) one-half on December 31, 2006, based on performance targets for the three-year period including 2004, 2005, and 2006.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.