CERUS CORP — Director's Dealing 2012

Mar 2, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CERUS CORP (CERS)
CIK: 0001020214
Period of Report: 2012-02-29

Reporting Person: Greenman William Mariner (Director, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-29	Common Stock	J	12020	$1.768	Acquired	111681	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-03-01	Option (Right to Buy)	$3.75	A	380000	Acquired	2022-02-28	Common Stock (380000)	Direct

Footnotes

F1: The shares beneficially owned increased due to a qualified ESPP purchase that took place on 2/29/12. The purchase of these shares is being reported on a voluntary basis.

F2: One eighth (1/8th) of the shares subject to the Option shall vest six (6) months after the transaction date and one forty-eighth (1/48th) of the shares subject to the Option shall vest on the first day of each month thereafter.

F3: Not applicable.