The Buick Motor Company began in 1903 by David Dunbar Buick, who sold his stock in the firm for a small sum shortly after. The first Buick made for sale was the Model B, of which there were 37 examples. At one time Buick was the largest car maker in the United States, which allowed its owners to acquire other companies such as Cadillac, Oldsmobile and Pontiac giving birth to the General Motors Corporation.