(Refiles to add dropped word in headline)

       MEXICO CITY (Reuters) - Railroad and mining company Grupo Mexico has sold almost all of its shares in Mexican airport operator Grupo Aeroportuario del Pacifico (GAP), a regulatory filing showed on Friday.

       The two companies had been locked in a legal battle since 2011 when Grupo Mexico said it planned to launch a tender offer for at least 30% of the airport operator.

       GAP has said its bylaws limit shareholders to holding no more than 10% of its outstanding stock and has been trying to force Grupo Mexico to reduce its stake.

       (This story refiles to add dropped word in headline)

       (Reporting by Noe Torres)