X0306 4 2023-03-01 0 0001020214 CERUS CORP CERS 0001605456 Jayaraman Vivek K C/O CERUS CORPORATION 1220 CONCORD AVE SUITE 600 CONCORD CA 94520 0 1 0 0 Chief Operating Officer Restricted Stock Unit 2023-03-01 4 A 0 240000 0.00 A 614226 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 vests in three equal annual installments beginning on March 12, 2024, subject to the Reporting Person's continuous service to the Issuer through such vesting date. Includes 4,812 shares purchased under Issuer's Employee Stock Purchase Plan on 02/28/23, respectively. Vivek K. Jayaraman by Chrystal Menard, attorney-in-fact 2023-03-03