FORM OF REGISTRATION RIGHTS AGREEMENT AMONG THE REGISTRANT, HARBOUR ISLAND ACQUISITION SPONSOR LLC AND THE HOLDERS SIGNATORY THERETO
Harbour Island Acquisition Corp. I
REGISTRATION RIGHTS AGREEMENT
THIS REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of [●], 2026 is made and entered into by and among Harbour Island Acquisition Corp. I, a Cayman Islands exempted company (the “Company”), Harbour Island Acquisition Sponsor LLC, a Delaware limited liability company (the “Sponsor”), Clear Street LLC, as the representative of the underwriters (the “Representative”), and the undersigned parties listed under Holder on the signature pages hereto (each such party, and any person or entity who hereafter becomes a party to this Agreement pursuant to Section 5.2 of this Agreement, a “Holder” and collectively the “Holders”).
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