Grupo Aeroportuario del Centro Norte, S.A.B. de C.V. 36,000,000 Series B Shares (without par value) of Grupo Aeroportuario del Centro Norte, S.A.B. de C.V. directly or in the form of American Depositary Shares UNDERWRITING AGREEMENTUnderwriting Agreement • July 16th, 2013 • Central North Airport Group • Airports, flying fields & airport terminal services • New York
shares, without par value, of the Company (the “Series B Shares”), directly or in the form of American Depositary Shares (the “ADSs”). The Series B Shares, including any ADSs representing such Series B Shares, to be purchased by the Underwriters as set forth in this Underwriting Agreement (the “Agreement”) are hereinafter called, collectively, the “International Firm Shares.” The Selling Shareholder also proposes to sell to the Underwriters, at the option of the Underwriters and as set forth in this Agreement, an aggregate of not more than an additional 5,400,000 Series B Shares directly or in the form of ADSs (the “International Option Shares,” and together with the International Firm Shares, hereinafter called the “International Shares”). The ADSs are to be evidenced by American Depositary Receipts (the “ADRs”) issued pursuant to a Deposit Agreement, effective as of December 27, 2012 (the “Deposit Agreement”), among the Company, JPMorgan Chase Bank, N.A., as Depositary (the “Deposita
