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A 154-foot, five-stage ATK booster rocket undergoes a two-minute test in Utah's west desert. (Courtesy of ATK)

Public companies and financial services

ATK

Defense contractor ATK, best known for producing ammunition and rockets, relocated its headquarters from Minneapolis to Arlington, where it already housed its Washington operations office. The company, more formally known as Alliant Techsystems, said the move, which meant taking over an additional floor in its Rosslyn office, would help ATK have a closer relationship with the government.

Trivia

ATK was formed when Honeywell spun off its defense business. The company developed the first electronic autopilot for the B-17 bomber for use on missions during World War II.

1300 Wilson Blvd., Suite 400

Arlington Va., 22209

703-412-5960

http://www.atk.com/

Founded: 1990

President and CEO: Mark W. DeYoung

Revenue: $4,842,260

Assets: $4,443,840

Employees (local): 18,000 (450)

NOTE: Our methodology for the rankings.