X0609 4 2026-10-21 0 0001737287 Allogene Therapeutics, Inc. ALLO 0001491874 Parker Geoffrey M. false 210 EAST GRAND AVE SOUTH SAN FRANCISCO CA 94080 0 1 0 0 CHIEF FINANCIAL OFFICER 0 Common Stock 2026-10-21 4 S 0 36342 1.34 D 1045877 D 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. Reflects forfeiture of 195,000 shares subject to performance RSUs granted to the Reporting Person on October 10, 2023. 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. Includes 11,924 shares of the Issuer's common stock acquired by the reporting person on September 15, 2026 pursuant to an employee stock purchase program. /s/Earl Douglas, Attorney-in-Fact 2026-10-23