0001213900-26-095299 Sample Contracts

REGISTRATION RIGHTS AGREEMENT
Registration Rights Agreement • August 31st, 2026 • JATT III Acquisition Corp • Blank checks • New York

THIS REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of August 25, 2026, is made and entered into by and between JATT III Acquisition Corp, a Cayman Islands exempted company (the “Company”), JATT Ventures III L.P., a Cayman Islands exempted limited partnership (the “Sponsor”) and each of the undersigned parties listed on the signature page hereto under “Holders” (each such party, together with the Sponsor 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”).

INDEMNITY AGREEMENT
Indemnity Agreement • August 31st, 2026 • JATT III Acquisition Corp • Blank checks • New York

THIS INDEMNITY AGREEMENT (this “Agreement”) is made as of August 25, 2026, by and between JATT III Acquisition Corp, a Cayman Islands exempted company (the “Company”), and [ ] (“Indemnitee”).

6,000,000 Ordinary Shares JATT III Acquisition Corp UNDERWRITING AGREEMENT
Underwriting Agreement • August 31st, 2026 • JATT III Acquisition Corp • Blank checks • New York

JATT III Acquisition Corp, a Cayman Islands exempted company (the “Company”), proposes to sell to you and, as applicable, to the several underwriters named in Schedule I hereto (collectively, the “Underwriters”), for whom you (the “Representative”) are acting as representative, 6,000,000 ordinary shares, par value $0.0001 per share, of the Company (the “Ordinary Shares”) (said Ordinary Shares to be issued and sold by the Company being hereinafter called the “Underwritten Securities”). The Company also proposes to grant to the Underwriters an option to purchase up to 900,000 additional Ordinary Shares to cover over-allotments, if any (the “Option Securities”; the Option Securities, together with the Underwritten Securities, being hereinafter called the “Securities”). To the extent there are no additional Underwriters listed on Schedule I other than you, the term Representative as used herein shall mean you, as Underwriter, and the term Underwriter shall mean either the singular or plura

JATT III Acquisition Corp C/O 56 Westfield, NJ 07091
Administrative Services and Indemnification Agreement • August 31st, 2026 • JATT III Acquisition Corp • Blank checks

This letter agreement (this “Agreement”) by and between JATT III Acquisition Corp (the “Company”) and JATT Ventures III L.P. (the “Sponsor”), dated as of the date hereof, will confirm our agreement that, commencing on the date the securities of the Company are first listed on the Nasdaq Capital Market (the “Listing Date”), pursuant to a Registration Statement on Form S-1 and prospectus filed with the U.S. Securities and Exchange Commission (the “Registration Statement”) and continuing until the earlier of the consummation by the Company of an initial business combination (“Business Combination”) or the Company’s liquidation (in each case as described in the Registration Statement) (such earlier date hereinafter referred to as the “Termination Date”):

JATT III Acquisition Corp C/O 56 Westfield, NJ 07091
Underwriting Agreement • August 31st, 2026 • JATT III Acquisition Corp • Blank checks

This letter (this “Letter Agreement”) is being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”) entered into by and between JATT III Acquisition Corp, a Cayman Islands exempted company (the “Company”) and Guggenheim Securities, LLC, as representative (the “Representative”) of the underwriters named therein (the “Underwriters”), relating to an underwritten initial public offering (the “Public Offering”) of up to 6,900,000 of the Company’s ordinary shares, par value $0.0001 per share (including up to 900,000 shares that may be purchased to cover over-allotments, if any) (the “Ordinary Shares”). The Ordinary Shares will be sold in the Public Offering pursuant to a registration statement on Form S-1 and prospectus (the “Prospectus”) filed by the Company with the U.S. Securities and Exchange Commission (the “Commission”) and the Company has applied to have the Ordinary Shares listed on The Nasdaq Capital Market. Certain capitalized terms used her

PRIVATE PLACEMENT SHARES PURCHASE AGREEMENT
Private Placement Shares Purchase Agreement • August 31st, 2026 • JATT III Acquisition Corp • Blank checks • New York

THIS PRIVATE PLACEMENT SHARES PURCHASE AGREEMENT, dated as of August 25, 2026, (as it may from time to time be amended, this “Agreement”), is entered into by and between JATT III Acquisition Corp, a Cayman Islands exempted company (the “Company”), and JATT Ventures III L.P., a Cayman Islands exempted limited partnership (the “Purchaser”).

INVESTMENT MANAGEMENT TRUST AGREEMENT
Investment Management Trust Agreement • August 31st, 2026 • JATT III Acquisition Corp • Blank checks

This Investment Management Trust Agreement (this “Agreement”) is made effective as of August 25, 2026, by and between JATT III Acquisition Corp (the “Company”), and Odyssey Transfer and Trust Company, a Minnesota corporation (the “Trustee”).