Carlos Slim (born 1940; full name Carlos Slim Helú), Mexican businessman
Carlos Slim Domit (born 1967), Mexican businessman and son of Carlos Slim Helú
Carlos Solchaga (born 1944), Spanish politician and businessman
Carlos the Jackal, the nom de guerre of Ilich Ramírez Sánchez (born 1949), a Venezuelan assassin and terrorist serving a life sentence for murder in France