X0306 4 2022-12-21 0001941365 MasterBrand, Inc. MBC 0001955152 Van Doren Martin Scott ONE MASTERBRAND CABINETS DRIVE JASPER IN 47546 true EVP, Sales Common Stock, par value $0.01 per share 2022-12-21 4 F 0 316 7.54 D 201882 D 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). Includes a total of 192,563 restricted stock units that have not yet vested. /s/ Andrean Horton, attorney-in-fact for Martin Scott Van Doren 2022-12-23