 Pan Am's holding company, the Aviation Corporation of the Americas, was one of the most sought after stocks on the New York Curb Exchange in 1929, and flurries of speculation surrounded each of its new route awards.In April 1929 Trippe and his associates reached an agreement with United Aircraft and Transport Corporation (UATC) to segregate Pan Am operations to south of the Mexico – United States border, in exchange for UATC taking a large shareholder stake (UATC was the parent company of what are now Boeing, Pratt & Whitney, and United Airlines).The Aviation Corporation of the Americas changed its name to "Pan American Airways Corporation" in 1931.