Common Stock, par value $0.001 per share

Allogene Therapeutics, Inc.

210 East Grand Avenue, South San Francisco, CA, 94080

This Amendment amends and restates the first three paragraphs of Item 2(a) of the Original Schedule 13D in their entirety as set forth below: "This Schedule 13D is being filed jointly on behalf of TPG GP A, LLC, a Delaware limited liability company ("TPG GP A"), James G. Coulter and Jon Winkelried (each a "Reporting Person" and collectively, the "Reporting Persons"). TPG GP A exercises direct or indirect control over entities that collectively hold 100% of the shares of Class B common stock (which represents a majority of the combined voting power of the common stock) of TPG Inc., a Delaware corporation, which is the managing member of TPG GPCo, LLC, a Delaware limited liability company, which is the managing member of TPG Holdings I-A, LLC, a Delaware limited liability company, which is the general partner of TPG Operating Group I, L.P., a Delaware limited partnership, which is the sole member of each of (i) TPG GenPar VII Advisors, LLC, a Delaware limited liability company and (ii) The Rise Fund GenPar Advisors, LLC, a Delaware limited liability company. TPG GenPar VII Advisors, LLC is the general partner of TPG GenPar VII, L.P., a Delaware limited partnership, which is the general partner of TPG Carthage Holdings, L.P., a Delaware limited partnership, which directly held shares of Common Stock. The Rise Fund GenPar Advisors, LLC is the general partner of The Rise Fund GenPar, L.P., a Delaware limited partnership, which it the general partner of The Rise Fund Carthage, L.P., a Delaware limited partnership (together with TPG Carthage Holdings, L.P., the "TPG Funds"), which directly held shares of Common Stock. Because of TPG GP A's relationship with the TPG Funds, TPG GP A may have been deemed to have beneficially owned the shares of Common Stock held by the TPG Funds. TPG GP A is controlled by entities owned by Messrs. Coulter and Winkelried. Because of the relationship of Messrs. Coulter and Winkelried to TPG GP A, each of Messrs. Coulter and Winkelried may have been deemed to have beneficially owned the shares of Common Stock held by the TPG Funds. Messrs. Coulter and Winkelried disclaim beneficial ownership of the shares of Common Stock held by the TPG Funds except to the extent of their pecuniary interest therein."

This Amendment amends and restates Item 2(b) of the Original Schedule 13D in its entirety as set forth below: "The business address of each Reporting Person is c/o TPG Inc., 301 Commerce Street, Suite 3300, Fort Worth, Texas 76102. The following list includes the name, residence or business address and present principal occupation or employment of each director, executive officer and controlling person of TPG GP A (the "TPG GP A Officers"). All addresses are c/o TPG Inc., 301 Commerce Street, Suite 3300, Fort Worth, Texas 76102. James G. Coulter (Executive Chairman) Jon Winkelried (Chief Executive Officer) Axel Andre (Chief Financial Officer) Anilu Vazquez-Ubarri (Chief Operating Officer) Jennifer L. Chu (General Counsel) Joann Harris (Chief Compliance Officer) Martin Davidson (Chief Accounting Officer) Steven A. Willmann (Treasurer) Jean-Baptiste Garcia (Vice President) Matthew White (Vice President)"

This Amendment amends and restates Item 2(c) of the Original Schedule 13D in its entirety as set forth below: "The principal business of TPG GP A is serving as the sole ultimate general partner, managing member or similar entity of related entities engaged in making or recommending investments in securities of public and private companies. The present principal occupation of Mr. Coulter is Executive Chairman and Director of TPG Inc. and officer, director and/or manager of other affiliated entities. The present principal occupation of Mr. Winkelried is Chief Executive Officer and Director of TPG Inc. and officer, director and/or manager of other affiliated entities. See response to Item 2(b) above."

This Amendment amends and restates Item 2(e) of the Original Schedule 13D in its entirety as set forth below: "During the last five years, none of the Reporting Persons nor, to the knowledge of the Reporting Persons, without independent verification, any of the TPG GP A Officers was a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws."

This Amendment amends and restates Item 2(f) of the Original Schedule 13D in its entirety as set forth below: "Each of Messrs. Coulter, Winkelried and the TPG GP A Officers is a United States citizen."

This Amendment amends and restates the second paragraph of Item 5(a) of the Original Schedule 13D in its entirety as set forth below: "As a result of the September 2026 Offering, the Reporting Persons no longer beneficially own any shares of Common Stock."

See response to Item 5(a) above.

This Amendment amends and restates Item 5(e) of the Original Schedule 13D in its entirety as set forth below: "As a result of the September 2026 Offering, on September 28, 2026 the Reporting Persons ceased to be the beneficial owners of more than five percent of the shares of Common Stock."