Builders FirstSource (BLDR) director receives 299-share equity grant in lieu of cash

Rhea-AI Filing Summary

Builders FirstSource, Inc. director Mark A. Alexander received a stock award instead of cash fees for his board service. He acquired 299 shares of common stock on March 1, 2026 at a value of $104.29 per share under the company’s 2014 Incentive Plan. Following this grant, he directly holds 44,946 common shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider ALEXANDER MARK A

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, par value $0.01 per share	299	$104.29	$31K

Holdings After Transaction: Common Stock, par value $0.01 per share — 44,946 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

ALEXANDER MARK A

(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)
03/01/2026

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	03/01/2026		A(1)		299	A	$104.29	44,946	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	03/03/2026
	** 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 insider transaction did BLDR director Mark A. Alexander report?

Mark A. Alexander reported acquiring 299 Builders FirstSource shares. The shares were granted as equity compensation for his services as a director, rather than paid in cash, under the company’s 2014 Incentive Plan and its Amended and Restated Director Compensation Policy.

Was the BLDR Form 4 transaction a stock purchase or a grant?

The BLDR Form 4 shows a stock grant, not an open-market purchase. Code “A” reflects a grant or other acquisition, and the footnote explains the 299 shares were issued in lieu of cash compensation for board service under the 2014 Incentive Plan.

At what price were the BLDR shares valued in this Form 4 grant?

The 299 Builders FirstSource shares were valued at $104.29 per share. This per-share value is disclosed in the Form 4 and is used to determine the equity amount granted instead of cash director fees under the company’s compensation policy.

How many BLDR shares does Mark A. Alexander own after this transaction?

After the reported grant, Mark A. Alexander directly owns 44,946 Builders FirstSource common shares. This total includes the additional 299 shares issued as equity compensation in lieu of cash fees for his role as a director of the company.

Why did BLDR issue shares instead of cash to its director?

Builders FirstSource issued shares instead of cash under its Amended and Restated Director Compensation Policy. The Form 4 footnote states the 299-share grant reflects acquisition of stock in lieu of cash compensation pursuant to the company’s 2014 Incentive Plan for director services.

Does the BLDR Form 4 indicate any insider selling activity?

The BLDR Form 4 does not report any insider selling. It shows a single acquisition transaction coded “A,” representing a grant or award of 299 shares to director Mark A. Alexander as non-cash compensation, increasing his direct holdings to 44,946 common shares.