On April 5, 2021, Stephana Patton PhD, Corporate Secretary and General Counsel of Eiger BioPharmaceuticals, Inc. notified the company of her decision to resign from the company effective April 9, 2021 to join a private diagnostic biotechnology company. Dr. Patton's resignation did not result from any disagreement with the company on any matter relating to its operations, policies or practices. In connection with Dr. Patton's resignation, Dr. Patton and the Company entered into a separation agreement (the Separation Agreement") and a consulting agreement (the Consulting Agreement"), each dated April 9, 2021.