American automobile industry in the 1950s
In 1954, the smaller American Motors Corporation (AMC) was formed when Hudson merged with Nash-Kelvinator Corporation in a deal worth almost USD $200 million ($1.735 billion in 2013 dollars) the largest corporate merger in U.S. history at that time. Other mergers with smaller independent manufacturers followed. Although AMC was moderately successful it was never sufficiently large to challenge any of the Big Three, and was eventually bought by Chrysler in 1987.
Louis Chevrolet
Chevrolet had differences with Durant over the car's design, and in 1915 sold Durant his share in the company and started McLaughlin's Company in Canada building Chevrolets. By 1916 the trading of Chevrolet stock for GM Holding stock enabled Durant to repurchase a controlling stake in General Motors, and by 1917 the Chevrolet company that Louis had co-founded was merged as a company into General Motors after the outstanding Chevrolet stocks were purchased from McLaughlin in 1918. The McLaughlin Car Company then merged with his Chevrolet Motor Company of Canada Ltd. to become General Motors of Canada Ltd. in 1918, prior to the incorporation of the General Motors Corporation in the U.S. when General Motors Company of New Jersey dissolved.