Turkcell buys back TRY 278M in shares on October 23

The transaction represented 0.146% of capital and had a total value of TRY 277,731,356.

Rhea-AI Filing Summary

Turkcell İletişim Hizmetleri A.Ş. repurchased 3,201,696 shares on October 23, 2026, under its share buy-back program. The company reported an average purchase price of TRY 86.75 and a total transaction value of TRY 277,731,356. The repurchased shares represented 0.146% of capital. Turkcell said the program aims to protect stakeholder interests, support healthy price formation, and maintain the fair value of its shares.

Key Figures

Shares repurchased: 3,201,696 shares Average purchase price: TRY 86.75 per share Transaction value: TRY 277,731,356 +1 more

4 metrics

Shares repurchased 3,201,696 shares October 23, 2026

Average purchase price TRY 86.75 per share October 23, 2026 buy-back transactions

Transaction value TRY 277,731,356 October 23, 2026 buy-back transactions

Ratio to capital 0.146% Shares subject to the October 23, 2026 transaction

Key Terms

share buy-back program, nominal value, ratio to capital

3 terms

share buy-back program financial

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

A share buy-back program is when a company uses cash (or borrows) to buy its own stock from the open market or shareholders, reducing the number of shares available to investors. For investors this matters because fewer shares can raise earnings per share and often support the stock price, while signaling that management believes the shares are a good use of cash—similar to a retailer buying back coupons so each remaining coupon becomes relatively more valuable.

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 repurchase on October 23, 2026?

Turkcell repurchased 3,201,696 shares at an average price of TRY 86.75 per share. The total transaction value was TRY 277,731,356.

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 10/23/2026 - 02:59 PM EDT Accepted by SEC EDGAR 10/23/2026 - 02:58 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 23, 2026 announcing the registrant's share buy-back transactions.

Istanbul, October 23, 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 23, 2026, a total of 3,201,696 shares were purchased at an average price level of TRY 86.75. The total transaction value is TRY 277,731,356.

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	-

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 23, 2026	By:	/s/ Özlem Yardım
		Name:	Özlem Yardım
		Title:	Investor Relations Corporate Finance Director

	TURKCELL İLETİŞİM HİZMETLERİ A.Ş.
Date: October 23, 2026	By:	/s/ Kamil Kalyon
		Name:	Kamil Kalyon
		Title:	Chief Financial Officer