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 * Clarken Megan 2. Issuer Name and Ticker or Trading Symbol Criteo S.A. [ CRTO ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable)__X__ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Chief Executive Officer
(Last)         (First)         (Middle)
C/O CRITEO LEGAL DEPARTMENT, 387 PARK AVENUE SOUTH, 12TH FLOOR
3. Date of Earliest Transaction (MM/DD/YYYY)
5/13/2021
(Street)
NEW YORK, NY 10016
(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
Ordinary Shares (1) 5/13/2021    M    44988  A $18.90  298496 (2) D   
Ordinary Shares (1) 5/13/2021    S    44988  D $36.1315  253508 (2) 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
Stock Option (right to buy)  $18.9  5/13/2021    M        44988    (3) 12/11/2029  Ordinary Shares (1) 44988.0  $0  330479  D   

Explanation of Responses:
(1)  The Ordinary Shares may be represented by American Depository Shares, each of which represents One Ordinary Share.
(2)  For more information about the equity of the issuer held by the reporting person, please see the issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.
(3)  Stock options granted on December 11, 2019. One-fourth of the grant vests on the first anniversary of the grant date and additional 1/16th of the grant vests quarterly thereafter for a period of 36 months, subject to continued service through each vesting date.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Clarken Megan
C/O CRITEO LEGAL DEPARTMENT
387 PARK AVENUE SOUTH, 12TH FLOOR
NEW YORK, NY 10016
X
Chief Executive Officer

Signatures
/s/ Ryan Damon, as attorney-in-fact for Megan Clarken 5/14/2021
**Signature of Reporting Person Date
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