X0508 4 2024-03-01 false 0001661460 Poseida Therapeutics, Inc. PSTX 0001286102 LEONHARDT HARRY J C/O POSEIDA THERAPEUTICS, INC. 9390 TOWNE CENTER DRIVE SUITE 200 SAN DIEGO CA 92121 false true false false GC & Chief Compliance Officer false Common Stock 2024-03-01 4 A false 80743 0.00 A 230946 D Common Stock 2024-03-01 4 F false 16306 4.13 D 214640 D Employee Stock Option (Right to Buy) 4.13 2024-03-01 4 A false 111700 0.00 A 2034-02-28 Common Stock 111700 111700 D Represents shares issuable upon the vesting of restricted stock units granted pursuant to the Issuer's Equity Incentive Plan. The RSUs are scheduled to vest in four equal annual installments. Includes 3,000 shares acquired by the Reporting Person under the Issuer's 2020 Employee Stock Purchase Plan (the "ESPP") on March 20, 2023 and 3,000 shares acquired by the Reporting Person under the ESPP on September 20, 2023. Represents shares withheld by the Issuer to satisfy income tax obligations associated with the vesting of Restricted Stock Unit Awards granted to the Reporting Person on March 1, 2022 and March 1, 2023. 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 2024-03-04