[Form 4] Builders FirstSource, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Boydston Cory Jacobs reported acquisition or exercise transactions in this Form 4 filing.

Builders FirstSource, Inc. director Cory Jacobs Boydston reported receiving a grant of 409 shares of common stock. These shares were issued at a value of $76.26 per share in lieu of cash compensation for board service under the company’s 2026 Incentive Plan. Following this stock award, Boydston directly holds 26,721 shares of Builders FirstSource common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Boydston Cory Jacobs

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, par value $0.01 per share	409	$76.26	$31K

Holdings After Transaction: Common Stock, par value $0.01 per share — 26,721 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Stock grant: 409 shares Grant valuation price: $76.26 per share Shares held after grant: 26,721 shares +1 more

4 metrics

Stock grant 409 shares Common stock compensation grant to director on June 1, 2026

Grant valuation price $76.26 per share Value used for the 409-share compensation award

Shares held after grant 26,721 shares Director’s direct BLDR common stock holdings following the transaction

Acquisition transactions 1 transaction Single grant/award acquisition reported in this Form 4

Key Terms

2026 Incentive Plan, Amended and Restated Director Compensation Policy, Grant, award, or other acquisition

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"

Grant, award, or other acquisition financial

""transaction_code_description": "Grant, award, or other acquisition""

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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^*

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)
06/01/2026

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	06/01/2026		A(1)		409	A	$76.26	26,721	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/ Minator Azemi, by power of attorney	06/02/2026
	** 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 insider transaction did Cory Jacobs Boydston report for BLDR?

Cory Jacobs Boydston reported receiving 409 shares of Builders FirstSource common stock as a stock grant. The award was issued as compensation for her service as a director, replacing cash fees under the company’s 2026 Incentive Plan and Director Compensation Policy.

Was the BLDR Form 4 transaction a purchase or a stock grant?

The BLDR Form 4 shows a stock grant, not an open-market purchase. The 409 shares were classified as an “A” code transaction, meaning a grant or award received as compensation rather than shares bought or sold on the market by the director.

What price was used to value the 409-share grant in the BLDR filing?

The 409-share stock award to Cory Jacobs Boydston was valued at $76.26 per share. This price is used in the Form 4 solely to reflect the fair value of the compensation grant, not as an indication of an open-market trading price at that moment.

How many Builders FirstSource shares does the director hold after this grant?

After receiving the 409-share grant, Cory Jacobs Boydston directly holds 26,721 shares of Builders FirstSource common stock. This total reflects her updated ownership position as reported in the Form 4 following the compensation-related stock award under the 2026 Incentive Plan.

Why did Cory Jacobs Boydston receive BLDR shares instead of cash?

Cory Jacobs Boydston received Builders FirstSource shares in lieu of cash under the company’s 2026 Incentive Plan. A footnote explains the 409-share award represents compensation for director services, consistent with the Amended and Restated Director Compensation Policy emphasizing equity-based board remuneration.