Turkcell İletişim Hizmetleri A.Ş. (lit. 'Turkcell Communication Services') (, nyse: TKC) is the leading mobile phone operator of Turkey,<re[3] based in Istanbul. The company has 39.3 million subscribers as of September 2021.<re[4] In 2015, the company's number of subscribers climbed to 68.9 million, in nine countries.<re[5] The largest shareholder is Turkey Wealth Fund with 26.2% ownership. It is one of the world's biggest companies (Fortune 2000) list published by Fortune.<re[6] Turkcell has also developed Yaani, a browser for mobile and desktop.<re[7] Turkcell's general manager is Ali Taha Koç.<re[8]