On March 4, 2022, Julian D. Singer delivered a notice to Catalyst Biosciences, Inc. nominating Shelly C. Lombard, Matthew Stecker, and Igor Volshteyn for election to the Board as Class I directors at the 2022 annual meeting of stockholders and any adjournments, postponements, reschedulings, or continuations thereof. Julian D. Singer also notified the Company of his intent to present a non-binding stockholder proposal at the annual meeting requesting that the Board take the necessary steps to declassify the Board so that all directors are elected on an annual basis commencing at the next annual meeting of stockholders after the annual meeting.