SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
STADIUM CAPITAL MANAGEMENT LLC

(Last) (First) (Middle)
19785 VILLAGE OFFICE COURT
STE 101

(Street)
BEND OR 97702

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Builders FirstSource, Inc. [ BLDRR ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director X 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
01/14/2010
4. If Amendment, Date of 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
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 01/14/2010 X 8,604,529 A $3.5 13,971,669 I See Notes
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 Securities Underlying Derivative Security (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: 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
Subscription Rights (right to buy) $3.5 01/14/2010 X 8,604,529 12/14/2009 01/14/2010 Common Stock 8,604,529 $0 0 I See notes
1. Name and Address of Reporting Person*
STADIUM CAPITAL MANAGEMENT LLC

(Last) (First) (Middle)
19785 VILLAGE OFFICE COURT
STE 101

(Street)
BEND OR 97702

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
KENT BRADLEY R

(Last) (First) (Middle)
19785 VILLAGE OFFICE COURT
STE 101

(Street)
BEND OR 97702

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
SEAVER ALEXANDER M

(Last) (First) (Middle)
19785 VILLAGE OFFICE COURT
STE 101

(Street)
BEND OR 97702

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
Explanation of Responses:
Remarks:
1. The securities reported as beneficially owned by Stadium Capital Management, LLC ("SCM"), Bradley R. Kent (?Kent?) and Alexander M. Seaver (?Seaver?) on this Form 4 include securities also beneficially owned by investment advisory clients of SCM, including investment limited partnerships (the "Funds") of which SCM is the general partner and investment adviser. Kent and Seaver are the Managers of SCM. 2. SCM, Kent and Seaver disclaim membership in a group, within the meaning of Rule 13d-5(b) and Rule 16a-1(a)(1) under the Securities Exchange Act of 1934, as amended, with any other person. These securities are held directly by such investment advisory clients, including the Funds, for the benefit of such clients and the investors in those Funds. SCM, Kent and Seaver disclaim beneficial ownership of such securities, except to the extent of their pecuniary interest therein.
Stadium Capital Management, LLC by Bradley R. Kent, Manager 01/14/2010
Bradley R. Kent 01/14/2010
Alexander M. Seaver 01/14/2010
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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