CERS Cerus Corp

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                                                                                   
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940                       

1. Name and Address of Reporting Person * Menard Chrystal	2. Issuer Name and Ticker or Trading Symbol CERUS CORP [ CERS ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                    _____ 10% Owner __X__ Officer (give title below)    _____ Other (specify below) Chief Legal Officer
(Last)          (First)          (Middle) C/O CERUS CORPORATION, 1220 CONCORD AVE SUITE 600	3. Date of Earliest Transaction (MM/DD/YYYY) 2/8/2021
(Street) CONCORD, CA 94520 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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	2/8/2021		M		4167	A	$4.33 (1)	52752	D
Common Stock	2/8/2021		S		4167	D	$8.00 (1)	48585	D
Common Stock	2/8/2021		M		3958	A	$4.32 (1)	52543	D
Common Stock	2/8/2021		S		3958	D	$8.00 (1)	48585	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		7. Title and Amount of Securities Underlying Derivative Security (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)	$4.33	2/8/2021		M			4167	(2)	2/28/2027	Common Stock	4167	(3)	6250	D
Option (Right to Buy)	$4.32	2/8/2021		M			3958	(2)	2/28/2028	Common Stock	3958	(3)	29688	D

Explanation of Responses:
(1)	This transaction was executed pursuant to a 10b5-1 plan.
(2)	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.
(3)	Not applicable.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Menard Chrystal C/O CERUS CORPORATION 1220 CONCORD AVE SUITE 600 CONCORD, CA 94520			Chief Legal Officer

Signatures
Chrystal Menard		2/10/2021
**Signature of Reporting Person		Date