X0306 4 2019-04-10 0 0001020214 CERUS CORP CERS 0001459351 Green Kevin Dennis C/O CERUS CORPORATION 2550 STANWELL DRIVE CONCORD CA 94520 0 1 0 0 Chief Financial Officer Common Stock 2019-04-10 4 M 0 2786 2.15 A 82059 D Common Stock 2019-04-10 4 S 0 2786 6.5103 D 79273 D Option (Right to Buy) 2.15 2019-04-10 4 M 0 2786 D 2019-09-30 Common Stock 2786 0 D This transaction was executed pursuant to a 10b5-1 plan. The reported price in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.45 to $6.55 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. One eighth (1/8th) of the shares subject to the Option vested six (6) months after the grant date, and one forty-eighth (1/48th) of the shares subject to the Option vested each month thereafter. Not applicable. Kevin Green by Chrystal Menard, attorney-in-fact 2019-04-10