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 June 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 June 24, 2026 announcing the
registrant’s financing bond issuance.

Istanbul, June 24, 2026
Announcement Regarding the Financing Bond Issuance
Within the scope of the TRY 15,000,000,000 issuance
limit approved by the Capital Markets Board, the book building of the financing bond issuance of our Company with a maturity date of September
25, 2026, an annual simple interest of 40.25% with a nominal amount of TRY 500,000,000 to qualified investors within Türkiye, without
a public placement was completed, and the securities will be transferred to the investor accounts on June 24, 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 |
| Intended
Maximum Nominal Amount |
: - |
| The country
where the issue takes place |
: Türkiye |
| Title Of
Intermediary Brokerage House |
: |
| 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 |
: TRFTCEL92610 |
| Coupon Number |
: 1 |
| Currency
Unit |
: TRY |
| Coupon Payment
Frequency |
: Single Coupon |
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 |
|
|
|
Principal/Maturity
Date
Payment Amount |
25.09.2026 |
24.09.2026 |
25.09.2026 |
|
|
|
|
* 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
Disclaimer
This press release does not constitute an offer to sell, or a solicitation
of offers to purchase or subscribe for securities in the United States or any other jurisdiction in which such offer or solicitation
would be unlawful. The securities referred to herein have not been and will not be registered under the U.S. Securities Act of 1933,
as amended (the "Securities Act"), and may not be offered, sold or delivered within the United States or to or for the benefit of, US
persons (as defined in Regulation S under the Securities Act) absent registration or an applicable exemption from the registration requirements
of the Securities Act. This press release is being issued pursuant to and in accordance with Rule 135c under the Securities Act.
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: June 24, 2026 |
By: |
/s/
Özlem Yardım |
| |
|
Name: |
Özlem
Yardım |
| |
|
Title: |
Investor Relations Corporate
Finance Director |
| |
TURKCELL İLETİŞİM HİZMETLERİ A.Ş. |
| |
|
|
| Date: June 24, 2026 |
By: |
/s/
Kamil Kalyon |
| |
|
Name: |
Kamil Kalyon |
| |
|
Title: |
Chief Financial Officer |