On March 10, 2022, Ardelyx, Inc. appointed Robert Felsch as the company's Chief Accounting Officer. Mr. Felsch will continue to service as the company's Senior Vice President, Finance, a position held since February 1, 2022. Effective upon Mr. Felsch's appointment as Chief Accounting Officer, Justin Renz, the company's chief financial officer, Principal Accounting Officer and Treasurer will no longer serve as Principal Accounting Officer but will continue to serve as the company's chief financial officer and treasurer.

Mr. Felsch served as the Company's Vice President, Finance and Controller from September 2020 to September 2021, prior to his employment by IGM Biosciences as Senior Vice President Corporate Controller from September 2021 to January 2022. Mr. Felsch served as the Vice President, Corporate Controller, Head of FP&A for Array BioPharma, Inc, from May 2018 through May 2020, and through its acquisition by Pfizer Inc.