X0609 4 2026-03-16 0 0001737287 Allogene Therapeutics, Inc. ALLO 0001611024 Chang David D 210 EAST GRAND AVENUE SOUTH SAN FRANCISCO CA 94080 1 1 0 0 President and CEO 0 Common Stock 2026-03-16 4 S 0 47763 2.47 D 5150599 D Common Stock 856044 I See footnote Common Stock 856044 I See footnote Common Stock 1201108 I See footnote 1. Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person. 3. Includes 12,500 shares of the Issuer's common stock acquired by the reporting person on March 15, 2026 pursuant to an employee stock purchase program. Securities held in the name of the RTC 2019 Trust dated October 1, 2019. Securities held in the name of the JEC 2019 Trust dated October 1, 2019. Securities held in the name of the Chang 2006 Family Trust /s/Earl Douglas, Attorney-in-Fact 2026-03-18