X0306 4 2022-06-01 0 0001020214 CERUS CORP CERS 0001323113 Swisher Daniel N JR C/O CERUS CORPORATION 1220 CONCORD AVE CONCORD CA 94520 1 0 0 0 Common Stock 2022-06-01 4 A 0 20454 0.00 A 113808 D Option (Right to Buy) 4.84 2022-06-01 4 A 0 39866 A 2032-05-31 Common Stock 39866 39866 D Represents the number of shares underlying RSUs. Each RSU represents a contingent right to receive one share of common stock of the Issuer. The RSUs vest on the earlier of the first anniversary of the date of grant or the day prior to the next annual meeting of stockholders, subject to the Reporting Person's continuous service to the Issuer through such vesting date. The option shall vest one year from the date of grant. Not applicable. Daniel N. Swisher Jr. by Chrystal Menard, attorney-in-fact 2022-06-03