Humanigen, Inc. announced that on July 18, 2023, John Hohneker resigned from the Board, and on July 19, 2023 Cheryl Buxton and Kevin Xie both resigned from the Board, in each case with immediate effect. The decisions of Dr. Hohneker, Ms. Buxton and Mr. Xie to resign were not the result of disagreements with Humanigen on any matter relating to Humanigen's operations, policies or practices.