HEPS (D-MARKET) CFO Mehmet Seckin Koseoglu files initial Form 3

Rhea-AI Filing Summary

D-MARKET Electronic Services & Trading, which trades under the ticker HEPS, filed an initial insider ownership report for its Chief Financial Officer, Mehmet Seckin Koseoglu. This Form 3 does not list any insider share purchases, sales, option exercises, or other transactions, serving only to establish his reporting status as an officer.

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Accepted by SEC EDGAR 03/23/2026 - 08:19 PM Learn about SEC filing dates

SEC Form 3

FORM 3

UNITED 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

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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)

ISTANBUL 34387

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

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 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 Exercisable	Expiration Date	Title	Amount 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 Koseoglu	03/23/2026
	** Signature of Reporting Person	Date
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)

FAQ

What does the HEPS Form 3 filing by Mehmet Seckin Koseoglu report?

The HEPS Form 3 filing reports the initial insider ownership status of Chief Financial Officer Mehmet Seckin Koseoglu. It serves as a baseline disclosure of his position as an officer without detailing any specific share transactions or derivative holdings.

Does the HEPS Form 3 show any insider buying or selling by the CFO?

No, the HEPS Form 3 does not show any insider buying or selling by the CFO. The transaction summary lists zero purchases, sales, exercises, gifts, tax withholdings, or restructurings, indicating no reportable trades in this filing.

Who is the reporting person in the HEPS Form 3 filing?

The reporting person in the HEPS Form 3 filing is Mehmet Seckin Koseoglu. He is identified as an officer of D-MARKET Electronic Services & Trading, holding the title of Chief Financial Officer, and is not listed as a director or ten percent owner.

What role does Mehmet Seckin Koseoglu hold at D-MARKET Electronic Services & Trading (HEPS)?

Mehmet Seckin Koseoglu serves as the Chief Financial Officer of D-MARKET Electronic Services & Trading. In the Form 3, he is classified as an officer but not as a director or ten percent owner, which defines his reporting obligations as an insider.

Does the HEPS Form 3 include any derivative securities or option positions?

No, the HEPS Form 3 does not include any derivative securities or option positions. The derivative summary is empty and the transaction summary shows zero derivative transactions or exercises, so no options, warrants, or similar instruments are reported in this filing.