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 *
LEVY PAUL S
  2. Issuer Name and Ticker or Trading Symbol
Builders FirstSource, Inc. [BLDR]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
C/O JLL PARTNERS, INC., 450 LEXINGTON AVENUE, SUITE 3350
3. Date of Earliest Transaction (Month/Day/Year)
02/27/2006
(Street)

NEW YORK, NY 10017
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
Common Stock, par value $0.01 per share 02/27/2006   J   8,652,551.5 D (1) (2) (3) 8,652,551.5 I By JLL Fund V, L.P.

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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
LEVY PAUL S
C/O JLL PARTNERS, INC.
450 LEXINGTON AVENUE, SUITE 3350
NEW YORK, NY 10017
  X   X    

Signatures

 /s/ Paul S. Levy   03/01/2006
**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) Effective February 27, 2006, JLL Partners Fund V, L.P. ("JLL Fund V") and Warburg Pincus Private Equity IX, L.P. each acquired 50% of the limited liability company interests of Building Products, LLC (f.k.a. JLL Building Products, LLC) from the former members of Building Products, LLC, including JLL Partners Fund II, L.P. ("JLL Fund II") and JLL Partners Fund III, L.P. ("JLL Fund III"), for an aggregate purchase price of $398,017,369.
(2) Before the consummation of this transaction, Mr. Levy may have been deemed to have been the indirect beneficial owner of the 17,305,103 shares of common stock, par value $0.01 per share (the "Common Stock"), of Builders FirstSource, Inc. (the "Company") held by Building Products, LLC by virtue of Mr. Levy's position as a member of the board of managers of Building Products, LLC, his position as sole general partner of JLL Associates II, L.P., the general partner of JLL Fund II, and his position as a managing member of JLL Associates III, L.L.C., the general partner of JLL Fund III. As a result of the consummation of this transaction, Mr. Levy may be deemed to be the indirect beneficial owner of 8,652,551.5 of the shares of the Company's Common Stock held by Building Products, LLC by virtue of his position as sole managing member of JLL Associates G.P. V, L.L.C., which is the general partner of JLL Associates V, L.P., which in turn is the general partner of JLL Fund V.
(3) Mr. Levy only has a pecuniary interest in a portion of the shares set forth herein.

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