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 * Moore Carol 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)
SVP Reg. & Quality
(Last)         (First)         (Middle)
C/O CERUS CORPORATION, 1220 CONCORD AVE SUITE 600
3. Date of Earliest Transaction (MM/DD/YYYY)
8/12/2020
(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  8/12/2020    M    30000  A $3.00  141751  D   
Common Stock  8/12/2020    S    21621 (1) D $6.88 (2) 120130  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)  $3.00  8/12/2020    M        30000    (3) 8/31/2020  Common Stock  30000   (4) 0  D   

Explanation of Responses:
(1)  Represents the number of shares required to be sold to cover commission and mandatory tax withholdings on the "sell to cover" transaction described above and does not represent a discretionary sale by the reporting person.
(2)  The reported price in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.85 to $6.93 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the aforementioned range set forth.
(3)  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.
(4)  Not applicable.

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


SVP Reg. & Quality

Signatures
Carol Moore by Chrystal Menard, attorney-in-fact 8/14/2020
**Signature of Reporting Person Date
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