SEC Form 6-K filed by Turkcell Iletisim Hizmetleri AS

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 April 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 April 25, 2025, announcing the registrant's 1st quarter 2025 financial results calendar.

Istanbul, April 25, 2025

Announcement Regarding 1^st Quarter 2025 Financial Results Calendar

Our Company's financial results for the period January 1, 2025 – March 31, 2025 are planned to be publicly announced on May 9, 2025 after Borsa Istanbul trading hours.

For more information:

Turkcell Investor Relations

[email protected]

Tel: + 90 212 313 1888

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.