Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-39376 POSEIDA THERAPEUTICS, INC. (Exact name of Registrant as specified in its Charter) Delaware 47-2846548 (State ...

Exhibit 99.1 Poseida Therapeutics Provides Updates and Financial Results for the Fourth Quarter and Full Year 2023 Lead asset P-BCMA-ALLO1 Phase 1 clinical trial data presented at ASH 2023 demonstrated 82% ORR and favorable emerging safety and reliability profile Initiated clinical trial of Phase 1 P-CD19CD20-ALLO1, the Company’s first allogeneic dual CAR-T program Allogeneic CAR-T data to be presented at AACR in April 2024 describing activity of P-BCMA-ALLO1 in BCMA-experienced patients and comparison of l ...

Table of Contents 2 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ________ to ________ Commission File Number: 001-39376 Poseida Therapeutics, Inc. (Exact Name of Registrant as Specified in its Charte ...

Corporate Presentation A New Class of Cell & Gene Therapies with the Capacity to Cure AUGUST 2023 Disclaimer ...

Table of Contents 2 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ________ to ________ Commission File Number: 001-39376 Poseida Therapeutics, Inc. (Exact Name of Registrant as Specified in its Charter) De ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ________ to ________ Commission File Number: 001-39376 Poseida Therapeutics, Inc. (Exact Name of Registrant as Specified in its Charter) Del ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-39376 POSEIDA THERAPEUTICS, INC. (Exact name of Registrant as specified in its Charter) Delaware 47-2846548 (State ...

Corporate Presentation February 2023 A New Class of Cell & Gene Therapies with the Capacity to Cure Disclaimer This presentation and any accompanying oral commentary contain "forward-looking statements" within the meaning of the Private S ...

The Next Wave of Cell and Gene Therapies with the Capacity to Cure August 3, 2022 Disclaimer 1 This presentation and any accompanying oral commentary contain "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, as amended. Forward-looking statements are statements that are not historical facts and include, without limitation, statements related to future events; our future financial performance or condition; business strategy; expected timing and plans wit ...

The Next Wave of Cell and Gene Therapies with the Capacity to Cure Stifel 2021 Virtual Healthcare Conference Eric Ostertag, CEO November 2021 Disclaimer This presentation and any accompanying oral commentary contain "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, as amended. Forward-looking statements are statements that are not historical facts and include, without limitation, statements related to future events; our future financial performance or c ...