Builders FirstSource director granted 470 shares

A Builders FirstSource director received 470 shares as equity compensation in place of cash, increasing direct holdings to 27,191 shares.

Rhea-AI Filing Summary

Builders FirstSource, Inc. (BLDR) director Cory Jacobs Boydston received a grant of 470 shares of common stock on September 10, 2026. The shares were acquired at $0.00 per share in lieu of cash compensation for director services under the company’s 2026 Incentive Plan and Amended and Restated Director Compensation Policy, bringing Boydston’s directly held stake to 27,191 shares.

Insider Trade Summary

Grant/Award: 470 shares

Grant/Award 1 txn

Insider Boydston Cory Jacobs

Role Director

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

Holdings After Transaction: Common Stock, par value $0.01 per share — 27,191 shares (Direct)

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 Shares held after transaction: 27,191 shares

3 metrics

Shares granted 470 shares Equity grant to director on September 10, 2026, in lieu of cash compensation

Grant price per share $0.00 per share Compensation grant, not a market purchase or sale

Shares held after transaction 27,191 shares Director Cory Jacobs Boydston’s directly held common stock after the grant

Key Terms

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

3 terms

2026 Incentive Plan financial

"under the Corporation's 2026 Incentive Plan pursuant to"

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"

FAQ

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

What insider transaction did BLDR disclose for Cory Jacobs Boydston?

BLDR reported that director Cory Jacobs Boydston received a grant of 470 shares of common stock on September 10, 2026, as equity compensation for board service, rather than receiving cash fees, under the company’s 2026 Incentive Plan and director compensation policy.

Was the BLDR insider transaction a purchase or a compensation grant?

The transaction was a compensation grant, not a market purchase. Boydston acquired 470 shares of Builders FirstSource common stock at $0.00 per share in lieu of cash compensation for services as a director.

How many BLDR shares does Cory Jacobs Boydston hold after this grant?

After the September 10, 2026 grant, Cory Jacobs Boydston directly holds 27,191 shares of Builders FirstSource common stock, as reported in the Form 4 filing.

Was the BLDR Form 4 transaction made under a Rule 10b5-1 plan?

No. The filing indicates the Rule 10b5-1 checkbox is not affirmed, and the footnote describes the transaction as equity compensation in lieu of cash under the 2026 Incentive Plan and director compensation policy, not under a trading plan.

What plan governed the 470-share grant reported by BLDR?

The 470-share grant to Cory Jacobs Boydston was made under Builders FirstSource’s 2026 Incentive Plan, pursuant to the company’s Amended and Restated Director Compensation Policy, and represents shares received instead of cash director fees.

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

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/14/2026 - 04:05 PM EDT Accepted by SEC EDGAR 09/14/2026 - 04:05 PM EDT 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^*

Boydston Cory Jacobs

(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	27,191	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 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)