As of December 31, 2017
OMA has 393.8 million common shares outstanding; 87.4% are Series B shares, and 12.6% are Series BB shares. (Repurchased shares are included in Series B Public Float).
OMA's Series B shares are listed on the Mexican Stock Exchange (BMV) and American Depositary Shares (ADSs) are listed on the NASDAQ Stock Market in the U.S.; each ADS represents 8 Series B shares.
OMA’s strategic partner, SETA, Servicios de Tecnología Aeroportuaria, S.A. de C.V. (SETA), a wholly-owned subsidiary of Empresas ICA, S.A.B., de C.V, owns all of the Series BB shares, which are not traded. CONOISA, Controladora de Operaciones de Infraestructura, S.A. de C.V. is a wholly-owned subsidiary of Empresas ICA ,S.A.B. de C.V.
Each Series B and Series BB share gives the holder equal dividend rights and one vote in shareholders' meetings. The holders of Series BB shares also have veto rights over certain actions, including the payment of dividends and the nomination or removal of certain members of senior management.