Poseida Therapeutics, Inc. announced the appointment of Eric Ostertag as Executive Chairman and the transition of current President and Chief Business Officer, Mark Gergen, to the role of Chief Executive Officer effective as of February 1, 2022. As Poseida's founder and CEO, Ostertag directed the Company's spin out in early 2015 from parent company Transposagen Biopharmaceuticals, Inc., a biotechnology company that commercialized gene editing technology in research applications. Ostertag also founded Transposagen, where he was CEO from 2003 to 2015.

Ostertag earned his M.D. and Ph.D. from the University of Pennsylvania. Under his leadership, Poseida grew to over 250 employees, raised significant private capital and successfully completed an IPO in 2020. The Company has also built a significant global intellectual property portfolio; received FDA clearance on four Investigational New Drug (IND) applications for novel cell therapies, dosing over 100 patients in clinical trials; and established multiple collaborations, including the recently announced gene therapy collaboration with Takeda Pharmaceutical Company Limited ("Takeda"), which has a potential total value of up to $3.6 billion.

Gergen joined Poseida in February 2018, serving as Chief Business Officer and Chief Financial Officer before being appointed President and Chief Business Officer in July 2020. During his career in the biotech and pharmaceutical industries, Gergen has provided strategic leadership to companies as they scale, grow, and execute on the promise of their technologies. Before joining Poseida, he held key leadership roles including that of Senior Vice President and Chief Operating Officer of Halozyme, Inc., Executive Vice President and Chief Operating Officer at Mirati Therapeutics, Inc. and as Senior Vice President of Corporate Development at Amylin Pharmaceuticals, Inc. He has also served in senior management positions at CardioNet Inc., Advanced Tissue Sciences, Inc., and Medtronic, Inc. Gergen received a J.D. from the University of Minnesota Law School and a B.A. in business administration from Minot State University in North Dakota.

Both Ostertag and Gergen will continue to serve as members of the Company's Board of Directors.