Common Contracts

2 similar Seller Joinder Agreement contracts by SEALSQ Corp, Wisekey International Holding S.A.

FORM OF SELLER JOINDER AGREEMENT
Seller Joinder Agreement • August 18th, 2026 • Wisekey International Holding S.A. • Services-computer processing & data preparation

THIS SELLER JOINDER AGREEMENT (this “Joinder Agreement”) is made and entered into as of December 12, 2025, by the undersigned shareholder (“Joining Seller”) of WISeSat.Space Corp., a British Virgin Islands business company (the “Company”), and accepted by each of the Company, Columbus Acquisition Corp., a Cayman Islands exempted company (together with its successors, “CAC”), WISeSat.Space Holdings Corp., a Cayman Islands exempted company (“Pubco”), and WISeKey International Holding Ltd., a Swiss company (together with its successors and permitted assigns, the “Signing Seller” and, together with the Joining Seller, the “Seller”). Reference is hereby made to that certain Business Combination Agreement, dated as of November 9, 2025 (as it may be amended, modified or supplemented from time to time in accordance with the terms thereof, including by this Joinder Agreement, the “BCA”), by and among (i) the Company, (ii) CAC, (iii) Pubco, (iv) WISeSat Merger Sub Corp., a Cayman Islands exempte

FORM OF SELLER JOINDER AGREEMENT
Seller Joinder Agreement • August 18th, 2026 • SEALSQ Corp • Semiconductors & related devices

THIS SELLER JOINDER AGREEMENT (this “Joinder Agreement”) is made and entered into as of December 12, 2025, by the undersigned shareholder (“Joining Seller”) of WISeSat.Space Corp., a British Virgin Islands business company (the “Company”), and accepted by each of the Company, Columbus Acquisition Corp., a Cayman Islands exempted company (together with its successors, “CAC”), WISeSat.Space Holdings Corp., a Cayman Islands exempted company (“Pubco”), and WISeKey International Holding Ltd., a Swiss company (together with its successors and permitted assigns, the “Signing Seller” and, together with the Joining Seller, the “Seller”). Reference is hereby made to that certain Business Combination Agreement, dated as of November 9, 2025 (as it may be amended, modified or supplemented from time to time in accordance with the terms thereof, including by this Joinder Agreement, the “BCA”), by and among (i) the Company, (ii) CAC, (iii) Pubco, (iv) WISeSat Merger Sub Corp., a Cayman Islands exempte