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The origins of Terex date to 1933, when the Euclid Company was founded by George A. Armington to build hauling dump trucks. In 1953, General Motors purchased Euclid, expanding the business to include more than half of all U.S. off-highway dump truck sales.
Due to a 1968 Justice Department ruling, GM was required to stop manufacturing and selling off-highway trucks in the United States for four years and divest the Euclid brand. GM coined the "Terex" name in 1968 from the Latin words "terra" (earth) and "rex" (king) for its construction equipment products and trucks not covered by the ruling.
After the German company IBH Holding AG acquired its Terex division in 1980 and filed for bankruptcy three years later, GM regained ownership of the brand and reorganized it into units located in Scotland, Brazil, and the USA. [ citation needed ]
American businessman Randolph W. Lenz bought Terex USA in 1986, exercising an option to purchase Terex Equipment Ltd the following year. In 1988, Lenz merged his primary construction equipment asset, Northwest Engineering Company, into Terex Corporation, making Terex the parent entity.
Incorporated in 1986, Terex Corporation was listed on the NYSE five years later, growing under the leadership of Ron DeFeo. In 1997, it acquired mining business from O&K, including the world's largest hydraulic excavator RH 400, later produced as Cat 6090; in 2010, it sold that business to Bucyrus.
Having acquired Terex's line of heavy haul trucks in December 2013, Volvo Construction Equipment (VCE) rebranded the business as Rokbak in September 2021. Succeeding DeFeo as president and CEO of Terex in 2015, John L. Garrison, Jr. further transformed the business through acquisitions, new-business launches, and divestitures.
In January 2024, the firm named Simon Meester, formerly President of Genie and the company's Aerial Work Platforms business segment, as Terex president and CEO. In October 2025, Terex announced that it planned to merge with REV Group, and that it was looking to spin off its Genie line of aerial lifts.
On February 2, 2026, Terex announced that it had completed its merger with REV Group.