MAS Acquisition XXXI Corp is a blank check acquisition company registered with the SEC under CIK 0001103032, representing the thirty-first vehicle in the MAS Acquisition series of similarly structured shell entities. On April 18, 2002, the company filed a Form 15-12G, formally terminating its registration under Section 12(g) of the Securities Exchange Act and ending its public reporting obligations. The MAS Acquisition vehicles were early-era blank check shells consistent with the acquisition company structures that predated and informed the modern SPAC format. No standard exchange ticker has been identified for this vehicle, and the sponsoring entity has not been publicly disclosed in available filings. For complete filing history, sponsor details, and transaction records on this and other historical SPAC vehicles, create a free account at SpacDesk.