X0306 4 2022-03-01 0 0001661460 Poseida Therapeutics, Inc. PSTX 0001910914 Warner Brent C/O POSEIDA THERAPEUTICS, INC. 9390 TOWNE CENTRE DRIVE, SUITE 200 SAN DIEGO CA 92121 0 1 0 0 President, Gene Therapy Common Stock 2022-03-01 4 A 0 307881 0.00 A 307881 D Stock Option (Right to Buy) 3.42 2022-03-01 4 A 0 431034 0.00 A 2032-02-29 Common Stock 431034 431034 D Represents shares issuable upon the vesting of restricted stock units granted pursuant to the Issuer's Inducement Plan. The RSUs are scheduled to vest in four equal annual installments. 12.5% of the shares subject to the stock option will vest and become exercisable on the six-month anniversary of the grant date listed in column 3 above, and the remaining shares will vest in 42 equal monthly installments thereafter. /s/ Harry J. Leonhardt, Attorney-in-Fact 2022-03-01