Builders FirstSource (BLDR) director granted 2,558 restricted stock units

Rhea-AI Filing Summary

Builders FirstSource, Inc. director William B. Hayes received an equity grant of 2,558 restricted stock units of common stock at $0.00 per unit as compensation. These restricted stock units vest on May 14, 2027 and convert into one share of common stock for each unit that vests.

After this award, Hayes directly holds 19,130 shares of Builders FirstSource common stock. He also has an indirect interest in 14,593 shares held by a Spousal Lifetime Access Trust, providing additional exposure to the company’s equity outside his direct holdings.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Hayes William B

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, par value $0.01 per share	2,558	$0.00	--
holding	Common Stock, par value $0.01 per share	--	--	--

Holdings After Transaction: Common Stock, par value $0.01 per share — 19,130 shares (Direct, null); Common Stock, par value $0.01 per share — 14,593 shares (Indirect, by Spousal Lifetime Access Trust)

Footnotes (1)

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Key Figures

RSUs granted: 2,558 restricted stock units Grant price: $0.00 per unit RSU vesting date: May 14, 2027 +2 more

5 metrics

RSUs granted 2,558 restricted stock units Equity award to director William B. Hayes

Grant price $0.00 per unit Restricted stock unit award under 2014 Incentive Plan

RSU vesting date May 14, 2027 Vesting for 2,558 restricted stock units

Direct holdings after award 19,130 shares Common stock directly owned by Hayes after transaction

Indirect holdings via trust 14,593 shares Common stock held by Spousal Lifetime Access Trust

Key Terms

restricted stock units, 2014 Incentive Plan, Spousal Lifetime Access Trust

3 terms

restricted stock units financial

"Reflects the acquisition of restricted stock units pursuant to the Corporation's 2014 Incentive Plan."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

2014 Incentive Plan financial

"Reflects the acquisition of restricted stock units pursuant to the Corporation's 2014 Incentive Plan."

Spousal Lifetime Access Trust financial

"nature_of_ownership: by Spousal Lifetime Access Trust"

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^*

Hayes William B

(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)
05/14/2026

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	05/14/2026		A		2,558(1)	A	$0	19,130	D
Common Stock, par value $0.01 per share								14,593	I	by Spousal Lifetime Access 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 the acquisition of restricted stock units pursuant to the Corporation's 2014 Incentive Plan. The restricted stock units vest on May 14, 2027 and entitle the reporting person to one share of common stock for each restricted stock unit that vests.

	/s/ Minator Azemi, by power of attorney	05/18/2026
	** 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)

FAQ

What did the Builders FirstSource (BLDR) Form 4 report for William B. Hayes?

The Form 4 shows director William B. Hayes received 2,558 restricted stock units of Builders FirstSource common stock as an equity award, increasing his direct holdings to 19,130 shares after the transaction.

How many Builders FirstSource shares did William B. Hayes acquire in this Form 4?

William B. Hayes acquired 2,558 restricted stock units, each representing a right to receive one share of Builders FirstSource common stock upon vesting, with no cash price per unit shown in the filing.

When do William B. Hayes’s new Builders FirstSource restricted stock units vest?

The 2,558 restricted stock units granted to William B. Hayes vest on May 14, 2027. On that date, each vested unit will entitle him to receive one share of Builders FirstSource common stock.

What are William B. Hayes’s direct and indirect BLDR share holdings after this filing?

After the award, William B. Hayes directly owns 19,130 shares of Builders FirstSource common stock and has an indirect interest in 14,593 shares held by a Spousal Lifetime Access Trust associated with him.

Was William B. Hayes’s Builders FirstSource transaction an open-market stock purchase or sale?

The reported transaction is a grant of restricted stock units, not an open-market purchase or sale. The Form 4 shows a code “A” acquisition with a $0.00 price per unit, reflecting compensation rather than trading activity.