KARIN L. WALKER

Karin L. Walker has served as our Chief Accounting Officer since 2013. Prior to joining Prothena in 2013, she was Vice President, Finance and Chief Accounting Officer of Affymax, Inc., a position she held from 2012 to 2013. From 2009 to 2012, Ms. Walker was Vice President, Finance and Corporate Controller at Amyris Inc. From 2006 to 2009, she was Vice President, Finance and Corporate Controller for CV Therapeutics, Inc. Ms. Walker also held senior financial leadership positions at Knight Ridder Digital, Accellion, Niku Corporation, Financial Engines, Inc. and NeoMagic Corporation. Ms. Walker served on the boards of Cyclacel Pharmaceutical Inc. (a publicly traded clinical-stage oncology company) from 2020 to January 2025 and LifeSci Acquisition Corp. (a publicly traded special purpose acquisition company) in 2020. She earned her B.S. in business from the California State Polytechnic University, San Luis Obispo, and is a certified public accountant.