Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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 *
  Robins Scott L
 2. Date of Event Requiring Statement (Month/Day/Year)
02/20/2018		 3. Issuer Name and Ticker or Trading Symbol
Builders FirstSource, Inc. [BLDR]
(Last)
(First)
(Middle)
2001 BRYAN ST., SUITE 1600		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
SVP - COO - West
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

DALLAS, TX 75201		 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 Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock, par value $0.01 per share 3,864
D
 
Common Stock, par value $0.01 per share 3,081 (1)
D
 
Common Stock, par value $0.01 per share 6,500 (2)
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Robins Scott L
2001 BRYAN ST., SUITE 1600
DALLAS, TX 75201		       SVP - COO - West  

Signatures

/s/ Jeffrey A. Wier, by power of attorney 02/28/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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) Reflects a portion of the restricted stock units acquired by the reporting person on January 4, 2016 pursuant to the Corporation's 2014 Incentive Plan. These restricted stock units vest on January 3, 2019 and entitle the reporting person to one share of common stock for each restricted stock unit that vests.
(2) Reflects restricted stock units acquired by the reporting person on March 1, 2017 pursuant to the Corporation's 2014 Incentive Plan. The restricted stock units vest in 33.3% increments on each of March 1, 2018-2020 and entitle the reporting person to one share of common stock for each restricted stock unit that vests.

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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