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Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO CONSOLIDATED FINANCIAL STATEMENTS Table of Contents 0 ý 0 As filed with the Securities and Exchange Commission on April 26 , 2021 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 FORM 20 - F REGISTRATION STATEMENT PURSUANT TO SECTION 12 ( b ) OR ( g ) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to OR SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of event requiring this shell company report Commission File Number : 1-15092 Republic of Turkey ( Jurisdiction of Incorporation . or Organization ) TURKCELL ILETISIM HIZMETLERI A.S. ( Exact Name of Registrant as Specified in Its Charter ) TURKCELL ( Translation of Registrant's Name into English ) Mr. Ali Serdar Yagci Telephone : +90 212 313 18 88 Facsimile : +90 216 504 4058 Turkcell Kucukyali Plaza Aydinevler Mahallesi Inonu Caddesi No : 20 Kucukyali Ofispark Maltepe Istanbul , Turkey ( Name , Telephone , E - mail and / or Facsimile Number and Address of Company Contact Person ) Turkcell Kucukyali Plaza Aydinevler Mahallesi Inonu Caddesi No : 20 Kucukyali Ofispark Maltepe Istanbul , Turkey ( Address of Principal Executive Offices ) Title of each class Ordinary Shares Nominal Value TRY 1.000 * Securities registered pursuant to Section 12 ( b ) ofthe Act : Trading symbol TKC Name of each exchange on which registered New York Stock Exchange New York Stock Exchange Not for trading on the NYSE , but only in connection with the registration of ADSS representing such ordinary shares pursuant to the requirements of the Securities and Exchange Commission Securities registered pursuant to Section 12 ( g ) of the Act : None Securities for which there is a reporting obligation pursuant to Section 15 ( d ) of the Act : None Indicate the number of outstanding shares of each of the issuer's classes of capital or common stock as of the close of the period covered by the annual report . Ordinary Shares , Nominal Value TRY 1.000 2,200,000,000 Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes ý No o If this report is an annual or transition report , indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 . Yes o No ý Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes ý Noo