X0306 4 2019-08-07 0 0001020214 CERUS CORP CERS 0001296322 Benjamin Richard J C/O CERUS CORPORATION 2550 STANWELL DRIVE CONCORD CA 94505 0 1 0 0 Chief Medical Officer Common Stock 2019-08-07 4 S 0 16444 5.0063 D 0 D The reported price in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.00 to $5.035 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the aforementioned range set forth. Richard J. Benjamin, by Chrystal Menard, attorney-in-fact 2019-08-09