Ownership Submission
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
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(Print or Type Responses)
1. Name and Address of Reporting Person *
JLL PARTNERS FUND V LP
   2. Issuer Name and Ticker or Trading Symbol
Builders FirstSource, Inc. [BLDR] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
450 LEXINGTON AVE, SUITE 3350		 3. Date of Earliest Transaction (Month/Day/Year)
12/06/2006
(Street)

NEW YORK, NY 10017		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ 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
Common Stock, par value $0.01 per share 12/06/2006   P   300,000 A $ 18.6 8,952,551.5 (1) I By Building Products, LLC (2)

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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

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
JLL PARTNERS FUND V LP
450 LEXINGTON AVE, SUITE 3350
NEW YORK, NY 10017		     X    
JLL Associates V, L.P.
450 LEXINGTON AVE, SUITE 3350
NEW YORK, NY 10017		     X    
JLL Associates G.P. V, L.L.C.
450 LEXINGTON AVE, SUITE 3350
NEW YORK, NY 10017		     X    

Signatures

 JLL Partners Fund V, L.P. By JLL Associates V, L.P. its general partner By JLL Associates G.P. V, L.L.C., its general partner /s/ Paul S. Levy, Managing Member of JLL Associates G.P. V, L.L.C.   12/07/2006
**Signature of Reporting Person Date
 By JLL Associates G.P. V, L.L.C., its general partner /s/ Paul S. Levy, Managing Member of JLL Associates G.P. V, L.L.C.   12/07/2006
**Signature of Reporting Person Date
 /s/ Paul S. Levy, Managing Member of JLL Associates G.P. V, L.L.C.   12/07/2006
**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 reporting persons disclaim beneficial ownership of these securities, and this report shall not be deemed an admission that any of the reporting persons is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.
(2) JLL Partners Fund V, L.P., indirectly beneficially owns 8,952,551.5 shares of common stock, par value $0.01 per share, of Builders FirstSource, Inc. by virtue of its position as a member of Building Products, LLC, and pursuant to the Amended and Restated Limited Liability Company Agreement of Building Products, LLC. JLL Associates V, L.P., is the general partner of JLL Partners Fund V, L.P. JLL Associates G.P. V, L.L.C. is the general partner of JLL Associates V, L.P.

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