Builders FirstSource (NYSE: BLDR) awards equity to Chief Talent Officer in Form 4

Rhea-AI Filing Summary

Builders FirstSource, Inc. reported that Chief Talent Officer Michael Hiller received equity compensation in the form of company stock. On March 15, 2026, he acquired 11,352 restricted stock units under the 2014 Incentive Plan, which vest in 33.3% increments on each of March 15, 2027, 2028, and 2029. He also acquired 5,594 shares through the vesting of previously granted performance-based restricted stock units. To cover related tax obligations on these vestings, 3,294 shares were withheld at a price of $88.09 per share. After these compensation-related transactions and tax withholding, Hiller directly holds 53,042 shares of Builders FirstSource common stock.

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

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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^*

Hiller Michael

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Talent Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/15/2026

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	03/15/2026		A(1)		11,352	A	$0.00	50,742	D
Common Stock, par value $0.01 per share	03/15/2026		A(2)		5,594	A	$0.00	56,336	D
Common Stock, par value $0.01 per share	03/15/2026		F(3)		3,294	D	$88.09	53,042	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 the acquisition of restricted stock units pursuant to the Corporation's 2014 Incentive Plan. The restricted stock units vest in 33.3% increments on each of March 15, 2027-2029 and entitle the reporting person to one share of common stock for each restricted stock unit that vests.

2. Reflects the vesting of performance-based restricted stock units granted pursuant to the Corporation's 2014 Incentive Plan.

3. Reflects shares withheld to pay tax withholding requirements on vesting of previously granted performance-based restricted stock units and restricted stock units.

	/s/ Minator Azemi, by power of attorney	03/17/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transactions did BLDR’s Chief Talent Officer report on March 15, 2026?

Michael Hiller reported equity compensation transactions on March 15, 2026. He received new restricted stock units and vested performance-based units, while a portion of shares was withheld to satisfy tax obligations tied to those vestings.

How many restricted stock units did Michael Hiller receive from Builders FirstSource (BLDR)?

He received 11,352 restricted stock units under the 2014 Incentive Plan. These units vest in three equal 33.3% installments on March 15 of 2027, 2028, and 2029, each converting into one share of common stock upon vesting.

What performance-based awards vested for BLDR’s Chief Talent Officer in this Form 4?

The filing shows 5,594 shares from performance-based restricted stock units vested. These awards were granted under Builders FirstSource’s 2014 Incentive Plan and converted into common stock when the performance and vesting conditions were satisfied.

Why were 3,294 BLDR shares disposed of in the March 15, 2026 transactions?

The 3,294 shares were withheld to pay tax withholding requirements on the vesting of performance-based restricted stock units and restricted stock units. This tax-withholding disposition occurred at a price of $88.09 per share and is not an open-market sale.

How many Builders FirstSource (BLDR) shares does Michael Hiller hold after these transactions?

After the reported grants, vesting, and tax-withholding disposition, Michael Hiller directly holds 53,042 shares of Builders FirstSource common stock. This figure reflects his updated direct ownership position following the March 15, 2026 equity compensation events.

How do the new BLDR restricted stock units for Michael Hiller vest over time?

The new restricted stock units vest in three stages. They vest in 33.3% increments on March 15 of 2027, 2028, and 2029, with each vested unit entitling Hiller to receive one share of Builders FirstSource common stock.