Coliseum Capital Management Increases Stake in MasterBrand, Inc. to 9.9%

Coliseum Capital Management, LLC, along with its affiliates and principals Adam Gray and Christopher Shackelton, filed a Schedule 13G/A on May 15, 2026, regarding their holdings in MasterBrand, Inc. (MBC). The reporting group disclosed beneficial ownership of 12,694,710 shares of common stock, representing a 9.9% ownership stake in the company based on shares outstanding as of May 4, 2026. This filing marks an increase from a previously reported 0% position, as indicated by the provided supplemental data. The shares are held across multiple entities: Coliseum Capital Partners, L.P. (CCP) directly owns 10,380,699 shares, while a separate account managed by Coliseum Capital Management, LLC holds 2,314,011 shares. Coliseum Capital Management serves as the investment adviser to CCP, with Coliseum Capital, LLC acting as the General Partner. Adam Gray and Christopher Shackelton maintain shared voting and dispositive power over the total aggregate shares. The filing was made under Rule 13d-1(c), certifying that the acquisition was not intended to influence or change control of the issuer.