Kent company dates back to 1880

• Business: Tree care, grounds maintenance, consulting. Markets include residential, commercial and utility.

• Global headquarters: 1500 N. Mantua St., Kent. This Davey Tree campus opened in 1985. Previously, headquarters employees were scattered in leased office space in downtown Kent.

• Founded: 1880 by John Davey, who left Somerset, England, for the United States in 1873; business was incorporated in 1909 by John Davey and his son Martin L. Davey Sr., who later served as Ohio’s governor from 1935 to 1939.

• Transaction: Founding family members sold the company to employees in 1979; Davey Tree is the largest employee-owned company in Ohio and one of the top 15 largest nationwide.

• Employees: More than 7,000, including about 500 in Northeast Ohio.

• Acquisitions: Davey has merged with or acquired more than 30 companies since 2003.

• Consolidated revenues: $591.73 million in 2010.

• Top executive: Longtime employee Karl Warnke was named chief executive officer and president in 2007. He was named chairman in 2009. Warnke began as a laborer with Davey in 1980 and moved into a management training program in 1982.

– Compiled by Katie Byard