In 2019, Knight-Swift settled a $100 million class-action lawsuit alleging the company failed to classify 20,000 owner-operator drivers as employees. was formed to serve as the parent company for both carriers. In 2017, Knight Transportation merged with Swift Transportation and Knight-Swift Transportation Holdings Inc. They have grown from a few associates to more than 4,000, and from a family-owned business to a publicly held company trading on the New York Stock Exchange (KNX) in 1994. Revenues have grown from over 13 million in 1991 to over $866 million in 2011, with operating ratios at or near 80% year after year. Starting with just a handful of trucks and one service center in Phoenix, Arizona, the company now runs a fleet of over 4,000 trucks and more than 8,700 trailers (dry, refrigerated, and brokerage). Knight began transporting general commodities from Phoenix, Arizona, to Los Angeles, California. The Moyes family and the Knight family both were raised in Plain City, Utah, before moving to Phoenix in the late 1960s. The four cousins worked for Swift Transportation, also based in Phoenix, and Randy was even a part-owner in Swift when Jerry Moyes bought out his interest. Knight Transportation was founded in 1990 by four cousins: brothers, Randy and Gary Knight and brothers Kevin and Keith Knight. In January 2022, the company expanded its LTL footprint with the acquisition of Midwest Motor Express. The company's primary subsidiaries are truckload carriers Knight Transportation, Swift Transportation, Midnite Express and, since July 2021, less than truckload (LTL) carrier AAA Cooper. It is the fifth largest trucking company in the United States. (referred to as Knight-Swift) is a publicly traded, American motor carrier holding company based in Phoenix, Arizona. Knight-Swift Transportation Holdings Inc.

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