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TKC 6-K

Turkcell Iletisim Hizmetleri A S (TKC)

6-K 2026-07-23 For: 2026-07-23
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Added on July 23, 2026

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 July 2026

Commission File Number: 001-15092

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

(Translation of registrant’s name into English)

Turkcell Küçükyalı Plaza

Aydınevler Mahallesi, İsmet İnönü Caddesi, No:20

Küçükyalı B Blok 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 July 23, 2026 announcing the the registrant's second quarter 2026 financial results calendar.

Istanbul, July 23, 2026

Announcement Regarding 2^nd^Quarter 2026 Financial Results Calendar

Our Company's financial results for the period April 1, 2026 – June 30, 2026 are planned to be publicly announced on August 13, 2026 after Borsa Istanbul trading hours.

For more information:

Turkcell Investor Relations

[email protected]

Tel: + 90 212 313 1888

1

SIGNATURES

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

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.
Date: July 23, 2026 By: /s/<br> Özlem Yardım
Name: Özlem<br> Yardım
Title: Investor Relations Corporate<br> Finance Director
TURKCELL İLETİŞİM HİZMETLERİ A.Ş.
--- --- --- ---
Date: July 23, 2026 By: /s/<br> Kamil Kalyon
Name: Kamil Kalyon
Title: Chief Financial Officer