Builders FirstSource director granted 470 shares

A Builders FirstSource director received a stock award instead of cash fees, increasing both direct and trust holdings.

Rhea-AI Filing Summary

Builders FirstSource, Inc. (symbol: BLDR) is the issuer of record for a Form 4 filing submitted to the SEC. Charles Dirkson R reported acquisition or exercise transactions in this Form 4 filing.

Builders FirstSource, Inc. (BLDR) director Charles Dirkson reported receiving 470 shares of common stock on September 10, 2026 as a grant in lieu of cash compensation for board service under the company’s 2026 Incentive Plan and Amended and Restated Director Compensation Policy.

After this award, he holds 14,766 shares directly and an additional 5,000 shares indirectly through a trust.

Insider Trade Summary

Grant/Award: 470 shares

Grant/Award 2 txns

Insider Charles Dirkson R

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, par value $0.01 per share F1	470	$0.00	$0.00
holding	Common Stock, par value $0.01 per share	--	--	--

Holdings After Transaction: Common Stock, par value $0.01 per share — 14,766 shares (Direct); Common Stock, par value $0.01 per share — 5,000 shares (Indirect, By trust)

Footnotes (1)

1. F1. Reflects acquisition of shares in lieu of cash compensation for services as a director under the Corporation's 2026 Incentive Plan pursuant to the Corporation's Amended and Restated Director Compensation Policy.

Key Figures

Shares granted: 470 shares Grant price per share: $0.00 per share Direct holdings after transaction: 14,766 shares +2 more

5 metrics

Shares granted 470 shares Stock grant on September 10, 2026 in lieu of cash compensation

Grant price per share $0.00 per share Reported price for the 470-share director compensation grant

Direct holdings after transaction 14,766 shares Common stock directly owned by Charles Dirkson after the grant

Indirect holdings by trust 5,000 shares Common stock held indirectly by trust as reported in the filing

Transaction date September 10, 2026 Date of the director stock grant

Key Terms

2026 Incentive Plan, Amended and Restated Director Compensation Policy, in lieu of cash compensation

3 terms

2026 Incentive Plan financial

"acquisition of shares in lieu of cash compensation for services as a director under the Corporation's 2026 Incentive Plan"

A 2026 incentive plan is a company’s formal program, often named for a year, that authorizes awards like stock options, restricted shares, and cash bonuses to employees and executives to motivate performance and retain talent. For investors it matters because the plan creates potential new shares or payouts that can dilute existing ownership and align management’s choices with company goals—think of it as a reward budget that affects both pay incentives and share value.

Amended and Restated Director Compensation Policy financial

"pursuant to the Corporation's Amended and Restated Director Compensation Policy"

in lieu of cash compensation financial

"Reflects acquisition of shares in lieu of cash compensation for services as a director"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did BLDR director Charles Dirkson report on this Form 4?

He reported an acquisition of 470 shares of Builders FirstSource common stock on September 10, 2026 as a grant in lieu of cash compensation for his services as a director under the company’s 2026 Incentive Plan.

At what price were the BLDR shares granted to director Charles Dirkson?

The 470 shares of Builders FirstSource common stock were reported at a price of $0.00 per share, reflecting that they were granted as compensation rather than purchased for cash.

How many BLDR shares does Charles Dirkson own directly after this transaction?

Following the September 10, 2026 stock grant, Charles Dirkson directly owns 14,766 shares of Builders FirstSource common stock, as reported in the Form 4 filing.

Does Charles Dirkson have any indirect ownership of BLDR shares?

Yes. The Form 4 shows an indirect holding of 5,000 shares of Builders FirstSource common stock held by trust, in addition to his direct holdings.

Was the BLDR director stock grant made under a specific compensation plan?

Yes. The acquisition of 470 shares was made under Builders FirstSource’s 2026 Incentive Plan pursuant to the company’s Amended and Restated Director Compensation Policy, and was received in lieu of cash compensation for board service.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/14/2026 - 04:06 PM Accepted by SEC EDGAR 09/14/2026 - 04:05 PM Learn about SEC filing dates

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^*

Charles Dirkson R

(Last) (First) (Middle)

C/O BUILDERS FIRSTSOURCE, INC.

6031 CONNECTION DR., STE. 400

(Street)

IRVING TEXAS 75039

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/10/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	09/10/2026		A(1)		470	A	$0.00	14,766	D
Common Stock, par value $0.01 per share								5,000	I	By trust

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 2026 Incentive Plan pursuant to the Corporation's Amended and Restated Director Compensation Policy.

	/s/ Alena Brenner, by power of attorney	09/14/2026
	** 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.
* Form 4: SEC 1474 (03-26)