M3-Brigade Acquisition IV Corp. (Nasdaq: MBD) is a blank-check company sponsored by M3-Brigade Capital Management, a credit-focused investment firm representing a partnership between Mast Capital Management and Brigade Capital Management. The vehicle filed its S-1 registration statement with the Securities and Exchange Commission on June 1, 2021, making it the fourth SPAC in the M3-Brigade series and part of a broader multi-vehicle SPAC program the sponsor ran during the 2021 issuance cycle. The company was oriented toward financial services sector targets, consistent with the sponsor's credit-market expertise and prior vehicle mandates. Sign up on SpacDesk for full filing data, deal timelines, and institutional analytics on MBD and thousands of other SPAC vehicles.