Horizon Space Acquisition I Corp.

Horizon Space Acquisition I Corp. (Nasdaq: HSPO) is a blank-check company targeting the space and aerospace technology sector. The SPAC filed a Form DEFA14A with the SEC on April 6, 2026, submitting additional proxy soliciting materials in connection with an active shareholder vote, indicating the company is in a late-stage process requiring investor action. DEFA14A filings typically accompany a pending business combination or extension proposal and are used to supplement previously distributed proxy disclosures. The sponsor identity was not confirmed in the available filing metadata for this record. For verified IPO date, sponsor details, trust status, and full proxy filing history on HSPO, sign up for complete data access at SpacDesk.