Descrição Diversified transportation holding company Grupo TMM is at home on the water or on the land. The company generates most of its revenue from its fleet of about 45 vessels, including offshore supply ships, product tankers, parcel tankers and tugboats. Oil and gas exploration and production companies operating in the Gulf of Mexico, including government-owned PEMEX, are the primary customers of TMM's maritime business. In addition, TMM provides a variety of ground-based logistics services, such as arranging the transportation of customers' freight by trucks and trains. It also operates two ports in Mexico. The family of chairman and CEO José Serrano Segovia owns a controlling stake in TMM.