Banco Santander Mexico S A Institución de Banca Múltiple Grupo Financiero Santander Mexico : BSMX – Called to a general ordinary shareholders’ meeting (25-Oct)

BANCO SANTANDER MEXICO, S.A.,

INSTITUCIÓN DE BANCA MULTIPLE,

GRUPO FINANCIERO SANTANDER MEXICO

CALL

By resolution of the Board of Directors of the Company, the holders of Series "F" and Series "B" shares of the capital stock of Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México (the "Company"), pursuant to the established by the Mexican General Corporations Law and the Corporate Bylaws, are called to a General Ordinary Shareholders' Meeting to take place at 12:00 hrs on October 25, 2021 at the offices of the Company, located at Prolongación Paseo de la Reforma 500, Colonia Lomas de Santa Fe, Alcaldía Álvaro Obregón, C.P. 01219, Mexico City, to address the following subjects:

AGENDA

1. Proposal and, if applicable, approval of the payment of a cash dividend to the stockholders of the Company for up to the amount and at the date determined by the Meeting.

1. Designation of special delegates to formalize and fulfill the resolutions adopted at the Shareholders' Meeting.

In order to attend the Meeting, shareholders shall present the corresponding form (Admission Card), which shall be issued at the offices of the Secretary of the Company at Prolongación Paseo de la Reforma 500, Colonia Lomas de Santa Fe, Alcaldía Álvaro Obregón, in Mexico City. Likewise, shareholders are informed that the forms required to attend and exercise their voting rights at such Meeting will be delivered upon the presentation of the certificate issued by S.D. Indeval Institución para el Depósito de Valores, S.A. de C.V., accompanied by the list of holders of such securities, and a copy of the Federal Taxpayer Registry of each stockholder pursuant to the terms of article 27 of the Mexican Federal Tax Code. The Registry of Shareholders shall be closed two business days before the date of the Shareholders' Meeting takes place.

Likewise, the information mentioned in the Agenda shall be at the shareholders disposal at no cost at the domicile of the Company mentioned in the foregoing paragraph at least 15 days before the date of the Shareholders' Meeting takes place, pursuant to the provisions of article 16 bis of the Mexican Banking Law and article 49 subsection I of the Mexican Securities Market Law.

The shareholders may be represented at the Meeting by a proxy appointed via power of attorney indicated in the forms prepared by the Company under the terms of article 16

of the Mexican Banking Law and article 49 subsection III of the Mexican Securities Market Law. Such forms shall be at the disposal of the shareholders at least 15 days before the date of the Shareholders' Meeting takes place at the domicile of the Secretary of the Company so that they may collect them and distribute them among their representatives.

Mexico City as of September 23, 2021

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Lic. Fernando Borja Mujica

Secretary of the Board of Directors