FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN 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 * Greenman William Mariner   2. Issuer Name and Ticker or Trading Symbol CERUS CORP [CERS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President and CEO (Last) (First) (Middle) C/O CERUS CORPORATION, 2550 STANWELL DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 03/03/2014 (Street) CONCORD, CA 94520 4. If Amendment, Date Original Filed(Month/Day/Year) 03/04/2014 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 Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock (7) 03/04/2014   M   53,500 A $ 2.28 162,745 (1) D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Option (Right to Buy) (6)

$ 6.28

03/03/2014

A

325,000

(2)

03/02/2024

Common Stock

325,000

(3)

325,000

D

Option (Right to Buy) (8)

$ 2.28

03/04/2014

M

53,500

(4)

06/28/2014

Common Stock

53,500

(5)

46,500

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Greenman William Mariner C/O CERUS CORPORATION 2550 STANWELL DRIVE CONCORD, CA 94520	X		President and CEO

Signatures

William M. Greenman by Chrystal Menard, attorney-in-fact		03/04/2014
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(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)	Includes shares purchased pursuant to a qualified Employee Stock Purchase Plan on 2/28/2007 of 3,994 shares, on 2/29/2008 of 3,546 shares, on 2/28/2013 of 7,692 shares and on 2/28/2014 of 4,448 shares.
(2)	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 each monthly anniversary of the transaction date thereafter.
(3)	Not applicable.
(4)	One eighth (1/8th) of the shares subject to the Option vested six months (6) after June 29, 2004 and one forty-eighth (1/48th) of the shares subject to the Option vested on each monthly anniversary of such date thereafter.
(5)	Not applicable.
(6)	The amendment does not change this line item.
(7)	The only change to this line item is the transaction date which was previously reported as 03/03/2014.
(8)	The only change to this line item is the transaction date which was previously reported as 03/03/2014.

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