Horizon Acquisition Corp, trading under the ticker HZAC, is a special purpose acquisition company that reached a critical milestone in its lifecycle when it filed a Form DEFM14A — a definitive merger proxy statement — with the SEC on September 24, 2021, under accession number 0001193125-21-282229. The DEFM14A filing indicates the SPAC had identified a proposed business combination target and was formally seeking shareholder approval to complete the transaction, placing HZAC squarely in the closing phase of its de-SPAC process. At that stage, the vehicle was among the actively watched blank-check companies across SpacDesk's tracked universe. Sign up at SpacDesk for the full filing history, deal timeline, sponsor details, and current status on HZAC.