Andrean R. Horton - 15 Dec 2025 Form 4 Insider Report for MasterBrand, Inc. (MBC)

Role: EVP, CLO & Secretary
Signature: /s/ Andrean R. Horton
Issuer symbol: MBC
Transactions as of: 15 Dec 2025
Net transactions value: -$260,028
Form type: 4
Filing time: 17 Dec 2025, 16:31:09 UTC
Previous filing: 17 Mar 2025
Next filing: 13 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Horton Andrean	EVP, CLO & Secretary	3300 ENTERPRISE PARKWAY, SUITE 300, BEACHWOOD	/s/ Andrean R. Horton	17 Dec 2025	0001661135

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MBC	Common Stock, par value $0.01 per share	Tax liability	$260,028	-22,320	-16%	$11.65	113,155	15 Dec 2025	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Reflects the withholding by the issuer of shares having a fair market value equal to the withholding taxes payable by the undersigned at the time the award vested and became payable, such transaction being exempt under Rule 16b-3(e).
F2	Includes 47,481 RSUs that have not yet vested.