[Form 4] Builders FirstSource, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Builders FirstSource director Craig Arthur Steinke acquired 270 shares of Common Stock on 09/01/2025 at $138.68 per share, increasing his beneficial ownership to 98,320 shares. The filing states the shares were issued in lieu of cash compensation under the companys 2014 Incentive Plan and Amended and Restated Director Compensation Policy. The Form 4 was submitted individually and was signed by Minator Azemi by power of attorney on 09/03/2025.

Positive

• Director increased beneficial ownership by 270 shares, aligning management incentives with shareholders
• Shares issued under established plan, indicating adherence to the company's director compensation policy

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Routine director compensation converted to equity, modestly increasing insider ownership and aligning interests with shareholders.

The transaction represents the typical practice of issuing equity in lieu of cash for board fees under an established compensation policy. The size of the grant270 shares at $138.68raises the reporting person's stake to 98,320 shares, which is a disclosure of ownership but does not by itself indicate a material change in control or strategy. Filing was executed via power of attorney, which is standard for administrative reporting.

Securities Analyst

TL;DR: Non-derivative acquisition of 270 shares for director compensation; informational for disclosure but not materially impactful on its own.

This Form 4 documents a non-derivative acquisition coded as an award (A) and priced at $138.68. The transaction is consistent with company compensation plans and increases reported beneficial ownership to 98,320 shares. For investors, this is a transparency item rather than a signal of strategic change, since it stems from standard director compensation rather than an open-market purchase or sale.

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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OMB Number:			3235-0287
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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).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Steinke Craig Arthur

(Last) (First) (Middle)

C/O BUILDERS FIRSTSOURCE, INC.

6031 CONNECTION DR., STE. 400

(Street)

IRVING TX 75039

(City) (State) (Zip)

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		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
09/01/2025

4. If Amendment, Date of 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

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	09/01/2025		A(1)		270	A	$138.68	98,320	D

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

Explanation of Responses:

1. Reflects acquisition of shares in lieu of cash compensation for services as a director under the Corporation's 2014 Incentive Plan pursuant to the Corporation's Amended and Restated Director Compensation Policy.

	/s/ Minator Azemi, by power of attorney	09/03/2025
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What transaction did Craig Arthur Steinke report on the Form 4 for BLDR?

The Form 4 reports an acquisition of 270 shares of Builders FirstSource common stock on 09/01/2025 at a price of $138.68 per share.

Why were the 270 shares issued to the director?

The filing states the shares were issued in lieu of cash compensation under the company's 2014 Incentive Plan pursuant to its Amended and Restated Director Compensation Policy.

How many shares does the reporting person beneficially own after the transaction?

Following the reported transaction, the reporting person beneficially owns 98,320 shares.

Who signed the Form 4 and when was it filed?

The Form 4 was signed via power of attorney by Minator Azemi on 09/03/2025.

Was this Form 4 filed individually or jointly?

The filing indicates it was a Form filed by one reporting person (individual filing).