Turkcell buys back 20,110 shares on October 28

The October 28 transaction represented 0.0009% of capital and had a reported value of TRY 1,832,021.

Rhea-AI Filing Summary

Turkcell (TKC) purchased 20,110 shares on October 28, 2026, under its share buy-back program, at an average price of TRY 91.10 per share. The transaction value was TRY 1,832,021.

Turkcell said the program aims to protect stakeholder interests, support healthy price formation in the market, and maintain the fair value of its shares. The transaction represented 0.0009% of capital.

Filing Explained

The table adds that, before the October 28, 2026 purchase, Turkcell had already bought back shares under the program with a cumulative nominal value of TRY 6,492,017.

Key Figures

Shares purchased: 20,110 shares Average transaction price: TRY 91.10 per share Transaction value: TRY 1,832,021 +2 more

5 metrics

Shares purchased 20,110 shares October 28, 2026 share buy-back

Average transaction price TRY 91.10 per share October 28, 2026 share buy-back

Transaction value TRY 1,832,021 October 28, 2026 share buy-back

Ratio to capital 0.0009% Shares subject to the October 28, 2026 transaction

Previously bought-back shares' nominal value TRY 6,492,017 Within the program, as listed for the October 28, 2026 transaction

Key Terms

buy-back program, Nominal Value, 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 financial

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

Nominal value is the stated or face amount assigned to a financial instrument — for shares it’s the par value printed on the stock certificate, and for money or returns it can mean the number not adjusted for inflation. Think of it like a price tag on an item versus its buying power: the tag tells you the label, but not how much you can actually buy. Investors care because nominal values affect accounting, legal capital, dividend calculations and comparisons over time when inflation may distort real worth.

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 28, 2026, and at what price?

Turkcell purchased 20,110 shares at an average price of TRY 91.10 per share on October 28, 2026, under its share buy-back program. The transaction value was TRY 1,832,021.

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

Form 6-K: How Foreign Companies Report to the SEC →

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Available on EDGAR 10/28/2026 - 10:27 AM EDT Accepted by SEC EDGAR 10/28/2026 - 10:27 AM 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 28, 2026 announcing the registrant's share buy-back transactions.

Istanbul, October 28, 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 28, 2026, a total of 20,110 shares were purchased at an average price level of TRY 91.10. The total transaction value is TRY 1,832,021.

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	-
Group B, TCELL, TRATCELL91M1	28.10.2026	20,110	0.0009	91.10	6,492,017	-

For more information:

Turkcell Investor Relations

investor.relations@turkcell

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 28, 2026	By:	/s/ Özlem Yardım
		Name:	Özlem Yardım
		Title:	Investor Relations Corporate Finance Director

	TURKCELL İLETİŞİM HİZMETLERİ A.Ş.
Date: October 28, 2026	By:	/s/ Kamil Kalyon
		Name:	Kamil Kalyon
		Title:	Chief Financial Officer