The story
Itaú was founded on September 30, 1947 as a subsidiary of the producer of cement Itaú and dedicated exclusively to the transportation of cargo. Operations started in 1948. In October 1955, suffering from the losses of some aircraft due to accidents, Itaú was sold to Transportes Aéreos Nacional. In 1956 Nacional incorporated the airline.
From Wikipedia’s article on Companhia Itaú de Transportes Aéreos, shared under CC BY-SA 4.0.3