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    SEC Form 3 filed by new insider Koseoglu Mehmet Seckin

    3/23/26 8:19:59 PM ET
    $HEPS
    Catalog/Specialty Distribution
    Consumer Discretionary
    Get the next $HEPS alert in real time by email
    SEC FORM 3SEC Form 3
    FORM 3UNITED STATES SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549

    INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

    Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
    or Section 30(h) of the Investment Company Act of 1940
    OMB APPROVAL
    OMB Number:3235-0104
    Estimated average burden
    hours per response:0.5
    1. Name and Address of Reporting Person*
    Koseoglu Mehmet Seckin

    (Last)(First)(Middle)
    KUSTEPE MAH. MECIDIYEKOY YOLU CAD.
    TRUMP TOWERS TOWER:2 NO:12 FLOOR:2 SISLI

    (Street)
    ISTANBUL34387

    (City)(State)(Zip)

    TURKEY

    (Country)
    2. Date of Event Requiring Statement (Month/Day/Year)
    03/18/2026
    3. Issuer Name and Ticker or Trading Symbol
    D-MARKET Electronic Services & Trading [ HEPS ]
    3a. Foreign Trading Symbol
    5. If Amendment, Date of Original Filed (Month/Day/Year)
    4. Relationship of Reporting Person(s) to Issuer
    (Check all applicable)
    Director10% Owner
    XOfficer (give title below)Other (specify below)
    Chief Financial Officer
    6. Individual or Joint/Group Filing (Check Applicable Line)
    XForm filed by One Reporting Person
    Form filed by More than One Reporting Person
    Table I - Non-Derivative Securities Beneficially Owned
    1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
    Table II - Derivative Securities Beneficially Owned
    (e.g., puts, calls, warrants, options, convertible securities)
    1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year)3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
    Date ExercisableExpiration DateTitleAmount or Number of Shares
    Explanation of Responses:
    Remarks:
    Exhibit List: Exhibit 24 - Power of Attorney. This Form 3 is being filed late due to an administrative delay in obtaining the reporting person's EDGAR filing credentials. With respect to the untimely filing of this Form 3, the reporting person intends to rely on the no-action relief available to directors and officers of foreign private issuers pursuant to Question 6 of the Holding Foreign Insiders Accountable Act FAQ (added on March 12, 2026).
    No securities are beneficially owned.
    /s/ Zeynep Tuana Temel, attorney-in-fact for Mehmet Seckin Koseoglu03/23/2026
    ** Signature of Reporting PersonDate
    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 5 (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).
    Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
    Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
    * Form 3: SEC 1473 (03-26)
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