Builders FirstSource (BLDR) exec gifts 900 shares to charity

Rhea-AI Filing Summary

Builders FirstSource COO-designate Michael Hiller reported a bona fide gift of 900 shares of common stock. The gift, dated June 4, 2026, transferred the shares to a charitable organization at no stated price. After the transaction, he continues to hold 52,142 shares directly.

Insider Trade Summary

900 shares gifted

Mixed 1 txn

Insider Hiller Michael

Role COO-Designate

Type	Security	Shares	Price	Value
Gift	Common Stock, par value $0.01 per share	900	$0.00	--

Holdings After Transaction: Common Stock, par value $0.01 per share — 52,142 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares gifted: 900 shares Price per share: $0.00 per share Shares held after transaction: 52,142 shares +1 more

4 metrics

Shares gifted 900 shares Bona fide gift of common stock on June 4, 2026

Price per share $0.00 per share Reported value for gifted shares

Shares held after transaction 52,142 shares Direct ownership after the gift

Total gifted shares in filing 900 shares GiftShares in transaction summary

Key Terms

bona fide gift, charitable organization, Common Stock, par value $0.01 per share

3 terms

bona fide gift financial

"transaction_code_description": "Bona fide gift""

A bona fide gift is a genuine, voluntary transfer of money, property, or benefits from one party to another made without expectation of repayment, services, or hidden conditions. Investors care because such gifts can affect company disclosures, related‑party transaction rules, tax treatment, and perceived conflicts of interest; think of it like someone giving you a present with no strings attached — but on a corporate scale, auditors and regulators need to verify it really is unconditional.

charitable organization financial

"Reflects the gift of common stock to a charitable organization."

Common Stock, par value $0.01 per share financial

"security_title": "Common Stock, par value $0.01 per share""

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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^*

Hiller Michael

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	COO-Designate

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/04/2026

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	06/04/2026		G(1)		900	D	$0	52,142	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 gift of common stock to a charitable organization.

	/s/ Minator Azemi, by power of attorney	06/08/2026
	** 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 BLDR executive Michael Hiller report?

Michael Hiller reported a bona fide gift of 900 BLDR shares. The Form 4 shows he transferred 900 shares of Builders FirstSource common stock as a gift to a charitable organization, rather than selling them in the open market.

How many Builders FirstSource (BLDR) shares did Michael Hiller gift?

He gifted 900 shares of Builders FirstSource common stock. The Form 4 lists a single non-derivative transaction coded as a bona fide gift, covering 900 shares at a reported price of $0.00 per share.

Does Michael Hiller still hold BLDR shares after this reported gift?

Yes, he still directly holds 52,142 BLDR shares after the gift. The Form 4 indicates that following the 900-share charitable transfer, his remaining direct ownership position in Builders FirstSource common stock is 52,142 shares.

Was the BLDR share transfer by Michael Hiller a sale or a gift?

The transaction was a bona fide gift, not a sale. The Form 4 uses transaction code G and describes the action as a gift transfer to a charitable organization, with no sale proceeds reported for the 900 shares.

When did the BLDR insider gift transaction by Michael Hiller occur?

The gift transaction is dated June 4, 2026. The Form 4 identifies this as the transaction date for the bona fide gift of 900 Builders FirstSource common shares to a charitable organization, with updated holdings reported afterward.