Constellation Acquisition Corp I (Nasdaq: CSTA) is a special purpose acquisition company that filed a definitive proxy statement with the SEC on January 16, 2026, signaling that the blank-check company is actively soliciting shareholder votes on a proposed business combination. The DEF 14A filing places CSTA in a late-stage transaction phase, as definitive proxies are submitted to shareholders only after a merger target has been identified and deal terms have been negotiated. Sponsor details and the specific industry sector of CSTA's announced target were not determinable from the filing header alone. Investors seeking full coverage — including sponsor identity, IPO vintage, target sector, and deal timeline — can sign up for complete data on SpacDesk.