Sec Form 4 Filing - Glickman Sarah JS @ Criteo S.A. - 2026-07-29

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 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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1. Name and Address of Reporting Person Glickman Sarah JS 2. Issuer Name and Ticker or Trading Symbol Criteo S.A. [ CRTO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Financial Officer (Last) (First) (Middle) C/O CRITEO LEGAL DEPT., 387 PARK AVENUE SOUTH, 12TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 07/29/2026 (Street) NEW YORK, NY10016 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 Ordinary Shares ( 1 ) 07/29/2026 D( 2 ) 430,897 D $ 0 ( 2 ) 0 D Ordinary Shares 07/29/2026 A( 2 ) 430,897 A $ 0 ( 2 ) 430,897 ( 3 ) D

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Glickman Sarah JS C/O CRITEO LEGAL DEPT. 387 PARK AVENUE SOUTH, 12TH FLOOR NEW YORK, NY10016 Chief Financial Officer Signatures /s/ Ryan Damon, as attorney-in-fact for Sarah Glickman 07/29/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Prior to the completion of the Conversion (as defined below), the Ordinary Shares may have been represented by American Depositary Shares ("ADSs"), each of which represents one Ordinary Share and were mandatorily exchanged for one Ordinary Share per each ADS in connection with the Conversion. ( 2 )On July 29, 2026, as previously approved by the Issuer's shareholders, the Issuer completed its conversion (the "Conversion") from a French public limited liability company ("French Criteo") to a Luxembourg public limited liability company ("Lux Criteo"). Upon the Conversion, (i) each Ordinary Share of French Criteo, including shares represented by ADSs, continued as one Ordinary Share of Lux Criteo, (ii) each time-based restricted stock unit and performance-based restricted stock unit of French Criteo continued as a time-based restricted stock unit and performance-based restricted stock unit, respectively, of Lux Criteo and (iii) each option or warrant to obtain shares of French Criteo continued as an option or warrant to obtain an equal number of shares of Lux Criteo, respectively. All rights attached to such awards remain unchanged after the Conversion, except the right to receive shares of French Criteo under these instruments became the right to receive shares of Lux Criteo. ( 3 )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.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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