In May 2012, GM recorded an 18.4% market share in the U.S. with stock imported. In November 2018, GM announced it would lay off more than 14,000 employees in North America, comprising 15% of its workforce and 25% of its executive staff in the region. The company plans to cease production in three assemblies (Lordstown Assembly in Ohio, Detroit-Hamtramck Assembly in Michigan and Oshawa The first GM Corporation in North America 1918 in Canada) and two engine/transmission (White Marsh, Maryland, and Warren, Michigan) plants during 2019. Employees from those plants would also be made redundant.