Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Green Kevin Dennis
 2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2009		 3. Issuer Name and Ticker or Trading Symbol
CERUS CORP [CERS]
(Last)
(First)
(Middle)
C/O CERUS CORPORATION, 2411 STANWELL DRIVE		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chief Accounting Officer
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

CONCORD, CA 94520		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 14,871
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Option (Right to Buy)   (1) 01/02/2016 Common Stock 25,000 $ 10.15 D  
Option (Right to Buy)   (2) 10/01/2016 Common Stock 6,150 $ 5.55 D  
Optioin (Right to Buy)   (3) 09/30/2017 Common Stock 7,500 $ 8.73 D  
Option (Right to Buy)   (4) 09/30/2018 Common Stock 11,000 $ 4.19 D  
Option (Right to Buy)   (5) 01/11/2019 Common Stock 23,000 $ 0.79 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Green Kevin Dennis
C/O CERUS CORPORATION
2411 STANWELL DRIVE
CONCORD, CA 94520		       Chief Accounting Officer  

Signatures

Kevin D. Green by Lori L. Roll, attorney-in-fact 03/26/2009
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) One eighth (1/8th) of the shares subject to the Option shall vest six (6) months after January 3, 2006, and one forty-eighth (1/48th) of the shares subject to the Option shall vest on the first day of each month thereafter.
(2) The shares subject to the Option shall vest in forty-eight (48) equal monthly installments over 4 years after October 2, 2006.
(3) One eighth (1/8th) of the shares subject to the Option shall vest six (6) months after October 1, 2007, and one forty-eighth (1/48th) of the shares subject to the Option shall vest on the first day of each month thereafter.
(4) One eighth (1/8th) of the shares subject to the Option shall vest six (6) months after October 1, 2008, and one forty-eighth (1/48th) of the shares subject to the Option shall vest on the first day of each month thereafter.
(5) One fourth (1/4th) of the shares subject to the Option shall vest annually after January 1, 2009.

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