Horizon Space Acquisition II Corp. (Nasdaq: HSPTU) is a blank-check company targeting the space and aerospace sector, organized as the second vehicle under the Horizon Space acquisition sponsor family. The company filed a Form 425 communication on March 24, 2026, under accession number 0001213900-26-033588, indicating active engagement in a business combination process. Form 425 filings are required for written communications made in connection with proposed mergers or acquisitions, signaling that the SPAC has entered a deal-related disclosure phase. The unit-level ticker suffix reflects the company's capital structure at its current stage. For complete filing history, deal timelines, sponsor background, and comparative SPAC analytics on Horizon Space Acquisition II Corp., sign up for full data access at SpacDesk.