0001185185-26-003214 Sample Contracts

FORM OF INDEMNITY AGREEMENT
Indemnity Agreement • August 3rd, 2026 • GX Acquisition Corp. III/Cayman • New York

THIS INDEMNITY AGREEMENT (this “Agreement”) is made as of [ ], 2026, by and between GX Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), and the undersigned (“Indemnitee”).

INVESTMENT MANAGEMENT TRUST AGREEMENT
Investment Management Trust Agreement • August 3rd, 2026 • GX Acquisition Corp. III/Cayman

This Investment Management Trust Agreement (this “Agreement”) is made effective as of [ ] [ ], 2026 by and between GX Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), and Continental Stock Transfer & Trust Company, a New York corporation (the “Trustee”).

REGISTRATION RIGHTS AGREEMENT
Registration Rights Agreement • August 3rd, 2026 • GX Acquisition Corp. III/Cayman • New York

THIS REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of [ ], 2026, is made and entered into by and among GX Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), and GX Sponsor III, a Delaware limited liability company (the “Sponsor”), Cohen & Company Capital Markets, a Division of Cohen & Company Securities, LLC (the “Representative”) (together with 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”).

UNDERWRITING AGREEMENT between GX ACQUISITION CORP. III and COHEN & COMPANY CAPITAL MARKETS, A DIVISION OF COHEN & COMPANY SECURITIES, LLC as Representative of the Underwriters Dated: [●], 2026 UNDERWRITING AGREEMENT
Underwriting Agreement • August 3rd, 2026 • GX Acquisition Corp. III/Cayman • New York

The undersigned, GX Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), hereby confirms its agreement with Cohen & Company Capital Markets, a division of Cohen & Company Securities, LLC (the “Representative”), and with the other underwriters named on Schedule A hereto (if any), for which the Representative is acting as representative (the Representative and such other underwriters being collectively referred to herein as the “Underwriters” or, each underwriter individually, an “Underwriter,” provided that, if only the Representative is listed on such Schedule A, any references to Underwriters shall refer exclusively to the Representative) as follows:

PRIVATE PLACEMENT WARRANTS PURCHASE AGREEMENT
Private Placement Warrants Purchase Agreement • August 3rd, 2026 • GX Acquisition Corp. III/Cayman • New York

THIS PRIVATE PLACEMENT WARRANTS PURCHASE AGREEMENT, dated as of [ ] [ ], 2026 (as it may from time to time be amended, this “Agreement”), is entered into by and between GX Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), and GX Acquisition III Sponsor LLC, a Delaware limited liability company (the “Purchaser”).

PRIVATE PLACEMENT WARRANTS PURCHASE AGREEMENT
Private Placement Warrants Purchase Agreement • August 3rd, 2026 • GX Acquisition Corp. III/Cayman • New York

This PRIVATE PLACEMENT WARRANTS PURCHASE AGREEMENT (this “Agreement”) is made as of the [ ] day of [ ], 2026, by and between GX Acquisition Corp. III, a Cayman Islands exempted company (the “Company”) and Cohen & Company Capital Markets, a Division of Cohen & Company Securities, LLC (the “Subscriber”).

WARRANT AGREEMENT
Warrant Agreement • August 3rd, 2026 • GX Acquisition Corp. III/Cayman • New York

THIS WARRANT AGREEMENT (this “Agreement”), dated as of [___], 2026, is by and between GX Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), and Continental Stock Transfer & Trust Company, a New York corporation, as warrant agent (in such capacity, the “Warrant Agent,” and also referred to herein as the “Transfer Agent”).

GX Acquisition Corp. III Miami Beach, FL 33140
Underwriting Agreement • August 3rd, 2026 • GX Acquisition Corp. III/Cayman

This letter (this “Letter Agreement”) is being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”) entered into by and among GX Acquisition Corp. III, a Cayman Islands exempted company (the “Company”) and Cohen & Company Capital Markets, a division of Cohen & Company Securities, LLC, as representative (the “Representative”) of the underwriters (the “Underwriters”), relating to an underwritten initial public offering (the “Public Offering”), of up to 23,000,000 of the Company’s units (including up to 3,000,000 units which may be purchased to cover over-allotments, if any) (the “Units”), each unit comprised of one Class A ordinary share, par value $0.0001 per share, of the Company (the “Class A Ordinary Shares”) and one-third of one redeemable warrant (each whole warrant, a “Warrant”). Each Warrant entitles the holder thereof to purchase one Class A Ordinary Share at a price of $11.50 per share, subject to adjustment. The Units shall be sold in t

GX ACQUISITION CORP. III
Securities Subscription Agreement • August 3rd, 2026 • GX Acquisition Corp. III/Cayman • New York

GX Acquisition Corp. III, a Cayman Islands exempted company limited by shares (the “Company”), is pleased to accept the offer of GX Acquisition III Sponsor LLC, a Delaware limited liability company (the “Subscriber” or “you”), has made to subscribe for 7,666,667 Class B Ordinary Shares US$0.0001 par value per share of the Company (the “Shares”), (the “Class B Ordinary Shares”), up to 1,000,000 of which are subject to complete or partial forfeiture by you to the extent the underwriters of the Company’s initial public offering (“IPO”) of units do not fully exercise their over-allotment option (the “Over-allotment Option”). For the purposes of this Agreement, references to “Ordinary Shares” are to, collectively, the Class B Ordinary Shares and the Company’s Class A Ordinary Shares, US$0.0001 par value per share (the “Class A Ordinary Shares”). Pursuant to the Company’s memorandum and articles of association (as may be amended, the “Articles”), Class B Ordinary Shares will convert into Cla

GX Acquisition Corp. III
Administrative Services Agreement • August 3rd, 2026 • GX Acquisition Corp. III/Cayman