 The name of the company was changed to Marmon Group in 1964, after the acquisition of Marmon-Herrington.Major acquisitions by Marmon Group have included Cerro Corporation (1976) and TransUnion (1981).In 2007, the Pritzker family sold a 60 percent interest in Marmon Group to Berkshire Hathaway, with plans for Berkshire to acquire the remaining 40% over the course of the next 5–6 years; the remaining minority stake was purchased by Berkshire in 2013.