Turkcell Capital Increase in Subsidiary BeST

Turkcell İletişim Hizmetleri A.Ş. announced a decision to increase the capital of its subsidiary, CJSC Belarusian Telecommunications Network (“BeST”). The total capital increase amounts to USD 7,000,000, with the funds to be disbursed in two installments. The first installment of USD 5,000,000 is planned for October 2026, followed by a second installment of USD 2,000,000 in December 2026. This strategic capital injection aims to support the operations and growth of BeST. The announcement was made on September 24, 2026, and is an official report filed under Form 6-K.