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.
Hyatt Roller Bearing Company
In 1916 General Motors purchased Hyatt for $13.5 million as part of a drive by William C. Durant, co-founder and president of General Motors, to bring key suppliers in-house.
Other suppliers were acquired at this time and assembled in the "United Motors" parts and accessories company with Alfred Sloan as president.
They were Hyatt, New Departure Manufacturing (bearings), Westom-Mott Axle, Remy Electric Company, Periman Rim Company, and Dayton Engineering Laboratories. 
United Motors was merged into General Motors in 1918. Sloan would become president of GM in 1923.