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

Report on Form 6-K dated July 27, 2023

Commission File Number: 001-15092

TURKCELL ILETISIM HIZMETLERI A.S.

(Translation of registrant’s name in English)

Aydınevler Mahallesi İnönü Caddesi No:20

Küçükyalı Ofispark

34854 Maltepe
Istanbul, Turkey

(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.

Form 20-F x          Form 40-F ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Yes ¨          No x

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Yes ¨          No x

Indicate by check mark whether the registrant by furnishing the information contained in this form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ¨          No x

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82- __________

Enclosure: A press release dated July 26, 2023, announcing the capital increase in Lifecell Ventures.

Istanbul, July 26, 2023

Announcement Regarding the Capital Increase in Lifecell Ventures

The capital of our Company's subsidiary Lifecell Ventures Coöperatief U.A. ("Lifecell Ventures") is increased by EUR 7,482,719 to EUR 1,776,862,273 from EUR 1,769,379,554. The entire capital commitment has been paid by our Company’s subsidiary Turktell Bilişim Servisleri A.Ş..

For more information:

Turkcell Investor Relations

investor.relations@turkcell.com.tr

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.

	TURKCELL ILETISIM HIZMETLERI A.S.
Date:  July 27, 2023	By:	/s/ Ali Serdar Yağcı
	Name:  Ali Serdar Yağcı Title:    Investor Relations and Corporate Finance Director

	TURKCELL ILETISIM HIZMETLERI A.S.
Date:  July 27, 2023	By:	/s/ Kamil Kalyon
	Name:  Kamil Kalyon Title:    Chief Financial Officer (Acting)