FORM OF JOINDER AGREEMENT TO THE REGISTRATION RIGHTS AGREEMENT (TRANSFERRED SHARES), DATED AS OF JUNE 12, 2026, BY AND BETWEEN THE COMPANY AND THE INVESTORS
M3-Brigade Acquisition V Corp.
JOINDER AGREEMENT
This Joinder Agreement (the “Joinder Agreement”), dated as of June 12, 2026, is executed by and between M3-Brigade Acquisition V Corp., a Cayman Islands exempted company (the “Company”), and the counterparty designated as “Buyer” in the signature page hereto (“Buyer”), in connection with that certain Registration Rights Agreement, dated as of July 31, 2024 (the “Agreement”), by and among the Company, MI7 Sponsor, LLC, a Delaware limited liability company (as assignee of M3-Brigade Sponsor V LLC) (the “Sponsor”), Cantor Fitzgerald & Co., and each person who has become a party thereto by entering into a joinder agreement in accordance with the terms thereof. Capitalized terms used but not defined herein shall have the meaning given to such terms in the Agreement.
By the execution of this Joinder Agreement, Buyer agrees as follows:
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