Horizon Space Acquisition I Corp. Ordinary Shares

. Entry into a Material Definitive Agreement. The disclosures set forth under Item 2.03 are incorporated by reference. Item 2.03 Creation of a Direct Financial

Unregistered Sales of Equity Securities. The information disclosed under Item 2.03 of this Current Report on Form 8-K is incorporated by reference into this Ite

Financial Statements and Exhibits. Exhibit No. Description 10.1 Sponsor Promissory Note, dated January 26, 2026, issued by the Company to Horizon Space Acquisit