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 September 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 September 25, 2026 announcing the redemption of the registrant's Bond with ISIN Code TRFTCEL92628.
Istanbul, September 25, 2026
Announcement Regarding the Redemption of the Bond with ISIN Code TRFTCEL92628
Within the scope of our Company's announcement dated June 24, 2026, the redemption and coupon payment of the financing bond with ISIN code TRFTCEL92628 with a nominal amount of TRY 500,000,000 a maturity of 93 days and an annual simple interest rate of 40.25% was made on September 25, 2026 (today).
| Board Decision Date | : 06.11.2025 |
| Related Issue Limit Info | |
| Currency Unit | : TRY |
| Limit | : 15,000,000,000 |
| Issue Limit Security Type | : Debt Securities |
| Sale Type | : Private Placement-Sale to Qualified Investor |
| Domestic / Oversea | : Domestic |
| Capital Market Board Approval Date | : 17.06.2026 |
| Capital Market Instrument to be Issued Info | |
| Type | : Bill |
| Maturity Date | : 25.09.2026 |
| Maturity (Day) | : 93 |
| Sale Type | : Sale To Qualified Investor |
| Intended Nominal Amount | : 500,000,000 |
| The country where the issue takes place | : Türkiye |
| Title Of Intermediary Brokerage House | : AK YATIRIM MENKUL DEĞERLER A.Ş. |
| Central Securities Depository | : Merkezi Kayıt Kuruluşu A.Ş. |
| Starting Date of Sale | : 23.06.2026 |
| Ending Date of Sale | : 24.06.2026 |
| Nominal Value of Capital Market Instrument Sold | : 500,000,000 |
| Maturity Starting Date | : 24.06.2026 |
| Issue Price | : 1 |
| Interest Rate Type | : Fixed |
| Interest Rate - Yearly Simple (%) | : 40.2500 |
| Interest Rate - Yearly Compound (%) | : 46.6931 |
| Traded in the Stock Exchange | : No |
| Payment Type | : TL Payment |
| ISIN Code | : TRFTCEL92628 |
| Coupon Number | : 1 |
| Currency Unit | : TRY |
| Coupon Payment Frequency | : Single Coupon |
1
Redemption Plan of Capital Market Instrument Sold
| Coupon Number | Payment Date | Record Date* | Payment Date | Interest
Rate - Periodic (%) |
Payment
Amount |
Exchange
Rate |
Was
The Payment Made? |
| 1 | 25.09.2026 | 24.09.2026 | 25.09.2026 | 10.2555 | 51,277,500 | ||
| Principal/Maturity Date Payment Amount | 25.09.2026 | 24.09.2026 | 25.09.2026 | 500,000,000 |
* The date on which the beneficiaries are determined.
Issuer Rating Note
| Rating Company | Rating Note | Rating Date | Is it Investment Grade? |
| JCR AVRASYA DERECELENDİRME A.Ş. | Long Term National Rating AAA (tr) | 22.05.2026 | Yes |
For more information:
Turkcell Investor Relations
investor.relations@turkcell.com.tr
Tel: + 90 212 313 1888
2
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: September 25, 2026 | By: | /s/ Özlem Yardım | |
| Name: | Özlem Yardım | ||
| Title: | Investor Relations Corporate Finance Director | ||
| TURKCELL İLETİŞİM HİZMETLERİ A.Ş. | |||
| Date: September 25, 2026 | By: | /s/ Kamil Kalyon | |
| Name: | Kamil Kalyon | ||
| Title: | Chief Financial Officer | ||