Thunderstone Acquisition Corp (TDST) is a blank-check company currently in the IPO registration process, having filed an amended registration statement (S-1/A) with the SEC on December 1, 2025, under accession number 0001213900-25-116505. The filing represents a revision to the company's initial S-1, indicating the SPAC is refining its offering terms or disclosure ahead of a prospective 2025 or 2026 IPO. As a special purpose acquisition company, Thunderstone is structured to raise capital through a public offering and subsequently identify and merge with a target operating business. Sponsor details and target sector focus are disclosed within the full registration statement. Sign up for SpacDesk to access complete filing data, sponsor profiles, and real-time status tracking for Thunderstone Acquisition Corp and hundreds of other active SPACs.