Builders FirstSource (NYSE: BLDR) director receives 2,558 RSUs grant

Rhea-AI Filing Summary

Builders FirstSource, Inc. director Charles R. Dirkson reported a compensation-related equity award rather than an open-market trade. He received 2,558 shares of common stock in the form of restricted stock units granted at a price of $0.00 per share under the company’s 2014 Incentive Plan.

The footnote explains these restricted stock units vest on May 14, 2027 and will convert into one share of common stock for each unit that vests. Following the award, Dirkson directly holds 13,887 shares and also has 5,000 shares held indirectly through a trust.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Charles Dirkson R

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 — 13,887 shares (Direct, null); Common Stock, par value $0.01 per share — 5,000 shares (Indirect, By trust)

Footnotes (1)

1. [object Object]

Key Figures

RSU grant size: 2,558 shares Grant price: $0.00 per share Vesting date: May 14, 2027 +2 more

5 metrics

RSU grant size 2,558 shares Restricted stock units granted on May 14, 2026

Grant price $0.00 per share Equity award under 2014 Incentive Plan

Vesting date May 14, 2027 RSUs convert to one share each on vesting

Direct holdings after grant 13,887 shares Common stock held directly following the transaction

Indirect holdings by trust 5,000 shares Common stock held indirectly by trust as of transaction date

Key Terms

restricted stock units, 2014 Incentive Plan, vest

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."

vest financial

"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."

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

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^*

Charles Dirkson R

(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	13,887	D
Common Stock, par value $0.01 per share								5,000	I	By 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 Builders FirstSource (BLDR) director Charles R. Dirkson report in this Form 4?

Charles R. Dirkson reported receiving an equity award of restricted stock units, not an open-market trade. The filing shows a grant of 2,558 common stock units as compensation under Builders FirstSource’s 2014 Incentive Plan, which will convert into shares upon vesting.

How many Builders FirstSource (BLDR) shares did the director receive in this grant?

The director received 2,558 restricted stock units tied to Builders FirstSource common stock. Each unit represents one future share upon vesting. The grant was reported at a price of $0.00 per share, reflecting a compensation award rather than a purchase for cash in the market.

When do Charles R. Dirkson’s Builders FirstSource (BLDR) restricted stock units vest?

The restricted stock units vest on May 14, 2027. On that date, each vested unit will entitle the director to receive one share of Builders FirstSource common stock, aligning his compensation with long-term company performance over the vesting period.

Did the Builders FirstSource (BLDR) director buy or sell shares on the open market?

The filing does not show any open-market buying or selling. Instead, it reports a compensation-related grant of 2,558 restricted stock units at $0.00 per share, which is a non-cash equity award rather than a discretionary market transaction in Builders FirstSource stock.

What are Charles R. Dirkson’s holdings in Builders FirstSource (BLDR) after this Form 4?

After the reported grant, Charles R. Dirkson directly owns 13,887 shares of Builders FirstSource common stock. In addition, 5,000 shares are held indirectly by a trust. These figures reflect equity exposure excluding the unvested restricted stock units granted in the transaction.

Under which plan were the Builders FirstSource (BLDR) restricted stock units granted?

The restricted stock units were granted under Builders FirstSource’s 2014 Incentive Plan. This plan provides equity-based compensation, and the awarded units convert into common stock on vesting, linking director compensation to the company’s share performance over time.