Louis Chevrolet
Also in 1916, American Motors Corporation (unrelated to the later American Motors created by the 1954 merger of Nash-Kelvinator Corporation and Hudson Motor Car Company) was formed in Newark, New Jersey, with Louis Chevrolet as vice president and chief engineer. By 1918 it was producing cars in a plant at Plainfield, New Jersey. In 1923 it merged with the Bessemer Motor Truck Company of Pennsylvania into Bessemer-American Motors Corporation, which lasted less than a year before merging with the Winther and Northway companies into Amalgamated Motors. The latter company apparently ceased soon after.
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.