TURKCELL ILETISIM HIZMETLERI A S

Foreign Filer Report • Nov 28, 2025

6-K 1 tm2532386d1_6k.htm FORM 6-K

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of November 2025

Commission File Number: 001-15092

TURKCELL ILETISIM HIZMETLERI A.S.

(Translation of registrant’s name into English)

Aydınevler Mahallesi İnönü Caddesi No:20

Küçükyalı Ofispark

34854 Maltepe Istanbul, Türkiye

(Address of Principal Executive Offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

x Form 20-F ¨ Form 40-F

Enclosure: A press release dated November 28, 2025, announcing the renewal of the registrant's Directors & Officers Liability Insurance.

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Istanbul, November 28, 2025

Announcement Regarding the Renewal of Directors & Officers Liability Insurance

Pursuant to Article 4.2.8 of the annex of the Capital Markets Board's Corporate Governance Communiqué; the existing "Directors & Officers Liability Insurance" for the members of our Company's Board of Directors, senior executives and senior executives of group companies has been renewed to be valid until October 1, 2026. The total liability limit of the insurance exceeds 25% of the Company's capital.

For more information:

Turkcell Investor Relations

investor.relations@turkcell.com.tr

Tel: + 90 212 313 1888

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, Turkcell Iletisim Hizmetleri A.S. has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

| /s/
Özlem Yardım | |
| --- | --- |
| Name : | Özlem Yardım |
| Title: | Investor Relations Corporate Finance Director |

| /s/
Kamil Kalyon | |
| --- | --- |
| Name : | Kamil Kalyon |
| Title: | Chief Financial Officer |

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