Turkcell buys back TRY 108M in shares on October 27

The purchases represented 0.054% of capital, and Turkcell described fair-value support as a buy-back program objective.

Rhea-AI Filing Summary

Turkcell İletişim Hizmetleri A.Ş. (TKC) purchased 1,196,377 shares on October 27, 2026, under its buy-back program, at an average price of TRY 90.50 per share. The transaction value was TRY 108,273,261. Turkcell said the program aims to protect stakeholder interests, support healthy price formation in the market, and maintain the fair value of its shares.

Filing Explained

The table places the October 27 purchase at 0.054% of capital and lists TRY 5,295,640 in nominal value of shares bought previously under the program.

Key Figures

Shares purchased: 1,196,377 shares Average transaction price: TRY 90.50 per share Transaction value: TRY 108,273,261 +1 more

4 metrics

Shares purchased 1,196,377 shares October 27, 2026 buy-back

Average transaction price TRY 90.50 per share October 27, 2026 buy-back

Transaction value TRY 108,273,261 October 27, 2026 buy-back

Ratio to capital 0.054% October 27, 2026 buy-back

Key Terms

buy-back program, Nominal Value of Shares Subject to Transaction, Ratio to Capital

3 terms

buy-back program financial

"Within the scope of our Company’s buy-back program"

A buy-back program is when a company uses cash to repurchase its own shares from the market or shareholders, reducing the total number of shares outstanding. It matters to investors because fewer shares can raise per-share earnings and ownership percentage—like cutting a pie into fewer slices so each slice is bigger—while also signaling management’s view of the company’s value and affecting cash available for other uses.

Nominal Value of Shares Subject to Transaction financial

"Nominal Value of Shares Subject to Transaction (TRY)"

Ratio to Capital financial

"Ratio to Capital (%)"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many shares did TKC buy back on October 27, 2026?

Turkcell purchased 1,196,377 shares at an average price of TRY 90.50 per share; the transaction value was TRY 108,273,261.

What share of capital did TKC's October 27 buy-back represent?

The shares purchased represented 0.054% of capital.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/27/2026 - 04:27 PM EDT Accepted by SEC EDGAR 10/27/2026 - 04:27 PM EDT Learn about SEC filing dates

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 October 2026

Commission File Number: 001-15092

TURKCELL İLETİŞİM HİZMETLERİ A.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 October 27, 2026 announcing the registrant’s share buy-back transactions.

Istanbul, October 27, 2026

Announcement Regarding the Share Buy-back Transactions

Within the scope of our Company’s buy-back program, with the aim of protecting the interests of our stakeholders and supporting healthy price formation in the market while maintaining the fair value of our shares, on October 27, 2026, a total of 1,196,377 shares were purchased at an average price level of TRY 90.50. The total transaction value is TRY 108,273,261.

The details of the buy-back transactions

Code of Share Subject to Buy-back	Transaction Date	Nominal Value of Shares Subject to Transaction (TRY)	Ratio to Capital (%)	Transaction Price (TRY / Unit)	Nominal Value Of Shares Previously Buy-Backed Within The Frame Of The Program (TRY)	Privileges. If Any, Associated with These Shares
Group B, TCELL, TRATCELL91M1	12.11.2025	2,093,944	0.095	95.58	-	-
Group B, TCELL, TRATCELL91M1	23.10.2026	3,201,696	0.146	86.75	2,093,944	-
Group B, TCELL, TRATCELL91M1	27.10.2026	1,196,377	0.054	90.50	5,295,640	-

For more information:

Turkcell Investor Relations
investor.relations@turkcell.com.tr
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: October 27, 2026	By:	/s/ Özlem Yardım
		Name:	Özlem Yardım
		Title:	Investor Relations Corporate Finance Director

	TURKCELL İLETİŞİM HİZMETLERİ A.Ş.
Date: October 27, 2026	By:	/s/ Kamil Kalyon
		Name:	Kamil Kalyon
		Title:	Chief Financial Officer