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6-K

Turkcell Iletisim Hizmetleri A S (TKC)

6-K 2025-08-05 For: 2025-08-05
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Added on April 08, 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 August 2025

Commission File Number: 001-15092

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

(Translation of registrant’s name into English)

Turkcell Küçükyalı Plaza

Aydınevler Mahallesi İnönü Caddesi No:20

Küçükyalı 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 August 4, 2025 announcing the final sale price for the sale of the registrant’s subsidiaries operating in Ukraine.

Istanbul, August 4, 2025

Announcement Regarding the Final Sale Priceof the Subsidiaries Operating in Ukraine

On September 9, 2024, we announced that all shares of our subsidiaries Lifecell LLC, LLC Global Bilgi, and LLC Ukrtower, along with all their rights and liabilities, were transferred to DVL Telecom (NJJ Holding group company).

Based on the financial statements prepared as of the closing date, the final sale price has realized as 538.7 million USD after adjustments including cash and debt.

Note: The relevant ratios have been calculatedconsidering the closing date of September 9, 2024. The 2023 revenue announced on March 20, 2024, has been used as the revenuefor the latest annual financial statements.

Board<br> Decision Date for Sale : 20.12.2023
Were<br> Majority of Independent Board Members’ Approved the Board Decision for Sale? : Yes
Title<br> of Non-current Financial Asset Sold : lifecell<br> LLC (“lifecell”), LLC Global Bilgi (“Global Ukrayna”), LLC Ukrtower (“Kule Ukrayna”)
Field<br> of Activity of Non-current Financial Asset sold : The<br> relevant companies are engaged in telecommunications, customer relationship management, and telecommunications infrastructure management<br> activities, respectively.
Capital<br> of Non-current Financial Asset sold : UAH<br> 12,711,848,745 UAH 47,226,374 UAH 1,964,040,941 respectively
Date<br> on which the Transaction was/will be Completed : August 4,<br> 2025.
Sales<br> Conditions : Cash
Nominal<br> Value of Shares Sold : UAH<br> 12,711,848,745, UAH 47,226,374, UAH 1,964,040,941, respectively
Sales<br> Price Per Share : -
Total<br> Sales Value : 538.7<br> million USD (18,268,112 thousand TRY)
Ratio<br> of Shares Sold to Capital of Non-current Financial Asset (%) : 100%,<br> 100%, 100%, respectively
Total<br> Ratio of Shares Owned in Capital of Non-current Financial Asset After Sales Transaction (%) : 0%,<br> 0%, 0%, respectively
Total<br> Voting Right Ratio Owned in Non-current Financial Asset After Sales Transaction (%) : 0%,<br> 0%, 0%, respectively
Ratio<br> of Non-current Financial Asset Sold to Total Assets in Latest Disclosed Financial Statements of Company (%) : 5.1%
Ratio<br> of Transaction Value to Sales in Latest Annual Financial Statements of Company (%) : 17.1%
Effects<br> on Company Operations : The<br> subsidiary relationship is terminated.
Profit<br> / Loss Arose After Transaction : 8,633,789<br> thousand TRY
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| --- | | How<br> will Sales Profit be Used if Exists? | : | - | | --- | --- | --- | | Board<br> Decision Date for Use of Sales Profit if Exists | : | - | | Title/<br> Name-Surname of Counter Party Bought | : | DVL<br> Telecom (NJJ Holding group company) | | Is<br> Counter Party a Related Party According to CMB Regulations? | : | No | | Relation<br> with Counter Party if any | : | None | | Agreement<br> Signing Date if Exists | : | 29.12.2023 | | Value<br> Determination Method of Non-current Financial Asset | : | Determined<br> through negotiation. | | Did<br> Valuation Report be Prepared? | : | Not<br> Prepared | | Reason<br> for not Preparing Valuation Report if it was not Prepared | : | Not<br> required by the legislation. | | Date<br> and Number of Valuation Report | : | - | | Title<br> of Valuation Company Prepared the Report | : | - | | Value<br> Determined in Valuation Report if Exists | : | - | | Reasons<br> if Transaction wasn’t/will not be performed in Accordance with Valuation Report | : | - |

For more information:

Turkcell Investor Relations

investor.relations@turkcell.com.tr

Tel: + 90 212 313 1888

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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: August 5, 2025 By: /s/<br> Özlem Yardım
Name: Özlem<br> Yardım
Title: Investor Relations Corporate<br> Finance Director
TURKCELL İLETİŞİM HİZMETLERİ A.Ş.
--- --- --- ---
Date: August 5, 2025 By: /s/<br> Kamil Kalyon
Name: Kamil Kalyon
Title: Chief Financial Officer