The company was started in 1946 by
Gregorio Ramirez Gonzalez, with a small shop to reconstruct
dry van trailers. It later grew into a larger corporation with a full list of products in which he invited his brothers to participate. ;Trailers de Monterrey The flagship of the Corporation was Trailers de Monterrey, which began as a dry van fabricator and grew into making trucks and buses under the
Ramírez and
Sultana brands. ;Industria Automotriz In 1957 Industria Automotriz, S.A. was established, manufacturing rims, stampings, assembly and sub assembly. ;Berg de Mexico In 1964 Berg de Mexico, S.A was established to produce
air brakes for heavy vehicles. In 1982 it was renamed to Industrias Vortec, S.A. ;Holding company By 1978 Grupo Industrial Ramirez was established as a
holding company, controlling all of the group's interests. ==Products==