SCHEDULE 13G/A 0001409751 XXXXXXXX LIVE 1 Common Stock, par value $0.01 per share 12/31/2025 0001941365 MasterBrand, Inc. 57638P104 3300 Enterprise Parkway Suite 300 Beachwood OH 44122 Rule 13d-1(c) Coliseum Capital Management, LLC b DE 0 10956767 0 10956767 10956767 N 8.6 IA Coliseum Capital, LLC b DE 0 8961638 0 8961638 8961638 N 7.0 OO Coliseum Capital Partners, L.P. b DE 0 8961638 0 8961638 8961638 N 7.0 PN Adam Gray b X1 0 10956767 0 10956767 10956767 N 8.6 IN Christopher Shackelton b X1 0 10956767 0 10956767 10956767 N 8.6 IN MasterBrand, Inc. 3300 Enterprise Parkway, Suite 300Beachwood, Ohio 44122 This Schedule 13G is being filed on behalf of Coliseum Capital Management, LLC ("CCM"), Coliseum Capital LLC ("CC"), Coliseum Capital Partners, L.P. ("CCP"), Adam Gray ("Gray") and Christopher Shackelton ("Shackelton" and together with CCM, CC, CCP and Gray, the "Reporting Persons"). The business address of the Reporting Persons is 105 Rowayton Avenue, Rowayton, CT 06853. (i) CCM is a Delaware limited liability company; (ii) CC is a Delaware limited liability company; (iii) CCP is a Delaware limited partnership; (iv) Gray is a United States citizen; and (v) Shackelton is a United States citizen. Y (i) CCM is the beneficial owner of 10,956,767 shares of common stock, $0.01 par value per share ("Common Stock"); (ii) CC is the beneficial owner of 8,961,638 shares of Common Stock; (iii) CCP is the beneficial owner of 8,961,638 shares of Common Stock; (iv) Gray is the beneficial owner of 10,956,767 shares of Common Stock; and (v) Shackelton is the beneficial owner of 10,956,767 shares of Common Stock. (i) CCM - 8.6%; (ii) CC - 7.0%; (iii) CCP - 7.0%; (iv) Gray - 8.6%; and (v) Shackelton - 8.6%. The ownership percentage of each Reporting Person has been calculated based on an assumed total of 127,537,368 shares of Common Stock issued and outstanding as of February 11, 2026, as reported in the Issuer's Annual Report on Form 10-K filed with the Securities and Exchange Commission on February 13, 2026. (i) 0 shares of Common Stock for CCM; (ii) 0 shares of Common Stock for CC; (iii) 0 shares of Common Stock for CCP; (iv) 0 shares of Common Stock for Gray; and (v) 0 shares of Common Stock for Shackelton. (i) 10,956,767 shares of Common Stock for CCM; (ii) 8,961,638 shares of Common Stock for CC; (iii) 8,961,638 shares of Common Stock for CCP; (iv) 10,956,767 shares of Common Stock for Gray; and (v) 10,956,767 shares of Common Stock for Shackelton. (i) 0 shares of Common Stock for CCM; (ii) 0 shares of Common Stock for CC; (iii) 0 shares of Common Stock for CCP; (iv) 0 shares of Common Stock for Gray; and (v) 0 shares of Common Stock for Shackelton. (i) 10,956,767 shares of Common Stock for CCM; (ii) 8,961,638 shares of Common Stock for CC; (iii) 8,961,638 shares of Common Stock for CCP; (iv) 10,956,767 shares of Common Stock for Gray; and (v) 10,956,767 shares of Common Stock for Shackelton. Y Y Y N CCM is the investment adviser to CCP, which is an investment limited partnership. CC is the General Partner of CCP. Gray and Shackelton are the managers of CC and CCM. The Reporting Persons may be deemed to be members of a group with respect to the Common Stock owned of record by CCP and a separate account managed by CCM (the "Separate Account"). CCP is the record owner of 8,961,638 shares of Common Stock and the Separate Account is the record owner of 1,995,129 shares of Common Stock. Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Coliseum Capital Management, LLC /s/ Adam Cina 02/17/2026 Coliseum Capital, LLC /s/ Adam Cina 02/17/2026 Coliseum Capital Partners, L.P. /s/ Adam Cina, by: Coliseum Capital, LLC, its General Partner 02/17/2026 Adam Gray /s/ Adam Cina 02/17/2026 Christopher Shackelton /s/ Adam Cina 02/17/2026