M3-Brigade Acquisition III Corp. (NYSE: MBSC-WT) operates as a special purpose acquisition company, or blank check company, focused on effecting mergers, capital stock exchanges, asset acquisitions, share purchases, reorganizations, or similar business combinations with one or more businesses, typically targeting enterprise values of at least $1 billion in sectors such as those impacted by COVID-19 or renewable energy; it offers no current products or operational services beyond its SPAC structure, including Class A ordinary shares, units, and public warrants that provide the right to purchase shares at a predetermined strike price post-combination. Founded in 2021 and headquartered at 1700 Broadway in New York City, the company is organized by the founders and senior executives of M3 Partners LP, a merchant banking and restructuring advisory firm, and Brigade Capital Management LP, a global credit-focused investment advisor with approximately $25 billion in assets under management. In its primary transaction, M3-Brigade Acquisition III Corp. completed a definitive business combination with Greenfire Resources Inc., a Calgary-based oil sands producer, valuing Greenfire at US$950 million and closing on September 20, 2023, after shareholder approval with 95.2% of votes cast in favor; this reverse merger resulted in Greenfire Resources Ltd. (NYSE: GFR) as the surviving public entity, with former Greenfire equity holders owning approximately 87% of the combined company, accompanied by a concurrent US$42 million private placement equity financing and the redemption of all public warrants at $0.50 each immediately prior to effectiveness. The MBSC-WT warrants continue trading post-merger as legacy securities tied to the original SPAC structure, though the company's Exchange Act registration was revoked following the de-SPAC, reflecting its transition from active sponsor seeking targets to a completed combination vehicle. Geographically, the SPAC operated from the United States with a focus on North American opportunities, including Canadian energy assets like Greenfire's thermal bitumen production in Alberta's Athabasca oil sands region.