Builders FirstSource grants James O’Leary 564 shares

Builders FirstSource director James O’Leary received stock-based director compensation, modestly increasing his direct ownership in BLDR.

Rhea-AI Filing Summary

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

Builders FirstSource, Inc. (BLDR) reported that director James O’Leary received a grant of 564 shares of common stock on September 10, 2026. The award was made at $0.00 per share as equity compensation in lieu of cash fees under the company’s 2026 Incentive Plan. Following this grant, O’Leary directly holds 91,795 shares of Builders FirstSource common stock. No transactions were reported under a Rule 10b5-1 trading plan.

Insider Trade Summary

Grant/Award: 564 shares

Grant/Award 1 txn

Insider OLEARY JAMES

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, par value $0.01 per share F1	564	$0.00	$0.00

Holdings After Transaction: Common Stock, par value $0.01 per share — 91,795 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: 564 shares Grant price per share: $0.00 per share Shares owned after transaction: 91,795 shares +1 more

4 metrics

Shares granted 564 shares Equity grant to director James O’Leary on September 10, 2026

Grant price per share $0.00 per share Equity compensation awarded in lieu of cash fees

Shares owned after transaction 91,795 shares Direct holdings of James O’Leary after the grant

Transaction date September 10, 2026 Date of the equity grant acquisition

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 the Corporation's Amended"

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 report for director James O’Leary?

Builders FirstSource reported that director James O’Leary received a grant of 564 shares of common stock on September 10, 2026 as equity compensation in lieu of cash director fees.

How many BLDR shares does James O’Leary own after this Form 4 transaction?

After the reported grant, James O’Leary directly holds 91,795 shares of Builders FirstSource common stock, according to the Form 4.

What was the price per share for James O’Leary’s BLDR stock grant?

The grant to James O’Leary was reported at a price of $0.00 per share, reflecting that it was an equity award granted as compensation rather than a market purchase.

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

No. The filing indicates that the transaction was not made pursuant to a Rule 10b5-1 trading plan, as the related checkbox is not marked affirmative.

What compensation program governed James O’Leary’s BLDR stock grant?

The 564-share grant was made in lieu of cash compensation for director services under Builders FirstSource’s 2026 Incentive Plan and its Amended and Restated Director Compensation Policy.

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^*

OLEARY JAMES

(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)		564	A	$0.00	91,795	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)