Kurt Wanninger - 01 Dec 2025 Form 4 Insider Report for MasterBrand, Inc. (MBC)

Role: EVP & Chief Operations Officer
Signature: Andrean R. Horton, attorney-in-fact for Kurt Wanninger
Issuer symbol: MBC
Transactions as of: 01 Dec 2025
Net transactions value: -$5,833
Form type: 4
Filing time: 03 Dec 2025, 19:24:17 UTC
Previous filing: 17 Mar 2025
Next filing: 17 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Wanninger Kurt	EVP & Chief Operations Officer	3300 ENTERPRISE PARKWAY, SUITE 300, BEACHWOOD	Andrean R. Horton, attorney-in-fact for Kurt Wanninger	03 Dec 2025	0001591630

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	$5,833	-526	-0.24%	$11.09	216,142	01 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	Represents shares withheld to satisfy the reporting person's tax withholding obligations upon the vesting of retirement-eligible restricted stock units, in accordance with the Issuer's equity incentive plan, which transactions are exempt under Rule 16b-3.
F2	Includes a total of 83,111 restricted stock units that have not yet vested and 40,348 shares, the receipt of which has been deferred under the issuer's deferred compensation plan.