Edgar Filing: LANDY JOSEPH

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 ^*

Warburg Pincus Private Equity IX, L.P.

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)

C/O WARBURG PINCUS LLC, 466 LEXINGTON AVENUE

3. Date of Earliest Transaction (Month/Day/Year)
03/04/2008

(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)
1.Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock, par value $0.01 per share	03/04/2008		P		3,600	A	$ 6.34	8,926,974.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		1,100	A	$ 6.35	8,928,074.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		3,200	A	$ 6.36	8,931,274.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		2,900	A	$ 6.4	8,934,174.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		3,000	A	$ 6.41	8,937,174.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		3,008	A	$ 6.42	8,940,182.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		400	A	$ 6.43	8,940,582.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		2,392	A	$ 6.45	8,942,974.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		1,200	A	$ 6.46	8,944,174.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		300	A	$ 6.47	8,944,474.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		1,300	A	$ 6.48	8,945,774.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		792	A	$ 6.49	8,946,566.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		2,800	A	$ 6.5	8,949,366.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		400	A	$ 6.51	8,949,766.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		100	A	$ 6.52	8,949,866.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		1,508	A	$ 6.53	8,951,374.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		100	A	$ 6.54	8,951,474.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		400	A	$ 6.55	8,951,874.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		1,000	A	$ 6.57	8,952,874.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		300	A	$ 6.58	8,953,174.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		3,300	A	$ 6.59	8,956,474.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		300	A	$ 6.6	8,956,774.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/04/2008		P		100	A	$ 6.62	8,956,874.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/05/2008		P		400	A	$ 6.63	8,957,274.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/05/2008		P		1,000	A	$ 6.64	8,958,274.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/05/2008		P		900	A	$ 6.66	8,959,174.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/05/2008		P		100	A	$ 6.67	8,959,274.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/05/2008		P		100	A	$ 6.68	8,959,374.5	D ⁽¹⁾
Common Stock, par value $0.01 per share	03/05/2008		P		300	A	$ 6.69	8,959,674.5	D ⁽¹⁾

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Warburg Pincus Private Equity IX, L.P. C/O WARBURG PINCUS LLC 466 LEXINGTON AVENUE NEW YORK, NY 10017		X
Warburg Pincus IX LLC C/O WARBURG PINCUS LLC 466 LEXINGTON AVENUE NEW YORK, NY 10017		X
Warburg Pincus Partners LLC C/O WARBUG PINCUS LLC 466 LEXINGTON AVENUE NEW YORK, NY 10017		X
WARBURG PINCUS LLC 466 LEXINGTON AVENUE NEW YORK, NY 10017		X
WARBURG PINCUS & CO C/O WARBURG PINCUS LLC 466 LEXINGTON AVENUE NEW YORK, NY 10017		X
KAYE CHARLES R C/O WARBURG PINCUS LLC 466 LEXINGTON AVE NEW YORK, NY 10017		X
LANDY JOSEPH C/O WARBURG PINCUS LLC 466 LEXINGTON AVE NEW YORK, NY 10017		X

Signatures

WARBURG PINCUS PRIVATE EQUITY IX, L.P., By: Warburg Pincus IX, LLC, its General Partner, By: Warburg Pincus Partners, LLC, its Sole Member, By: Warburg Pincus & Co., its Managing Member, By: /s/ Scott A. Arenare, Partner		03/06/2008
^**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)	See Exhibit 99.1
Remarks: Exhibit List: Exhibit 99.1 - Explanation of Responses Exhibit 99.2 - Joint Filers' Names and Addresses Exhibit 99.3 - Joint Filers' Signatures Exhibit 99.4 - Table I (Continued) - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

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