X0206 3 2018-10-10 0 0001737287 Allogene Therapeutics, Inc. ALLO 0001754424 MESSEMER DEBORAH M. 210 EAST GRAND AVENUE SOUTH SAN FRANCISCO CA 94080 1 0 0 0 Employee Stock Option (Right to Buy) 14.65 2028-09-26 Common Stock 210000 D One-fourth of the shares subject to the stock option shall vest on the first anniversary of the grant date of September 26, 2018, and the remaining shares shall vest in 36 successive equal monthly installments thereafter. /s/ Veer Bhavnagri, Attorney-in-Fact 2018-10-10