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Table of Contents ㅁ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 FORM 20 - F ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 Commission file number : 1-33168 Grupo Aeroportuario del Centro Norte , S.A.B. de C.V. ( Exact name of Registrant as specified in its charter ) Central North Airport Group ( Translation of Registrant's name into English ) United Mexican States ( Jurisdiction of incorporation or organization ) Plaza Metrópoli Patriotismo , Piso 5 Av . Patriotismo 201 Col. San Pedro de los Pinos , Benito Juárez Ciudad de México , México ( Address of principal executive offices ) Ruffo Pérez Pliego del Castillo Plaza Metrópoli Patriotismo , Piso 5 Av . Patriotismo 201 Col. San Pedro de los Pinos , Benito Juárez Ciudad de México , México +52 81 8625 4300 rperezpliego@oma.aero ( Name , Telephone , E - mail and / or Facsimile number and Address of Company Contact Person ) Securities registered or to be registered pursuant to Section 12 ( b ) of the Act : Title of each class : American Depositary Shares ( ADSs ) each representing 8 Series B shares Series B shares Trading Symbol ( s ) OMAB OMAB Name of each exchange on which registered The NASDAQ Stock Market LLC The NASDAQ Stock Market LLC * * Not for trading , but only in connection with the registration of ADSs , pursuant to the requirements of the Securities and Exchange Commission . Securities registered or to be 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 : N / A 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 : Series B shares Series BB shares Title of each class : Number of Shares 340,345,556 49,766,000 Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . If this report is an annual or transition report , indicate by check mark if the registrant is not required to file reports pursuant to Sections 13 or 15 ( d ) of the Securities Exchange Act of 1934 . Yes No □ Yes No Note - Checking the box above will not relieve any registrant required to file reports pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 from their obligations under those Sections . 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 No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( $ 232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . □ Yes No Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , or an emerging growth company . See definition of " large accelerated filer , " " accelerated filer , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer Accelerated filer Non - accelerated filer Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing : U.S. GAAP □ IFRS Emerging growth company Other □ Indicate by check mark which financial statement item the registrant has elected to follow : Item 17 Item 18 Yes No If this is an annual report , indicate by check mark whether the registrant is a shell company ( as defined by Rule 12b - 2 of the Exchange Act ) . Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( § 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . Yes No