Allogene Therapeutics, Inc.

The Company has adopted the Code of Business Conduct and Ethics that applies to all officers, directors and employees, which was amended in March 2026 as part of our annual review of our governance policies and our ongoing goal to enhance our corporate governance practices. The Code of Business Conduct and Ethics is available on the Company’s website at www.allogene.com. We intend to promptly disclose on our website, to the extent required by the rules and regulations of the SEC, (i) the nature of any amendment to the Code of Business Conduct and Ethics that applies to our principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, and (ii) the nature of any waiver, including an implicit waiver, from a provision of the Code of Business Conduct and Ethics that is granted to one of these specified individuals, the name of such person who is granted the waiver and the date of the waiver.