CERUS CORP — Director's Dealing 2011

May 20, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CERUS CORP (CERS)
CIK: 0001020214
Period of Report: 2011-05-17

Reporting Person: CORASH LAURENCE M (Director, Chief Medical Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-17	Common Stock	P	5000	$2.9540	Acquired	506700	Direct
2011-05-18	Common Stock	P	3500	$2.9171	Acquired	510200	Direct
2011-05-19	Common Stock	P	12000	$2.9548	Acquired	522200	Direct

Footnotes

F1: The price range is between $2.95 and $2.96 per share.

F2: The price range is between $2.91 and $2.92 per share.

F3: The price range is between $2.92 and $2.97 per share.