Principals: Richard Edelman, president and CEO (l); Matt Harrington, US president and CEO (r)
Ownership: Independent
Subsidiary agencies: Blue, StrategyOne, DJE Science, Matter, Ruth
Offices: 57 wholly owned globally, 15 in the US
Revenue: Global: $531,566,266 (calendar year), $487,224,693 (fiscal year); US: $349,221,558 (calendar year), $321,373,954 (fiscal year)
Headcount: 3,676 global; 2,263 US

Edelman reports global revenues rose 18.1% to $531.6 million in 2010, a year in which the firm made four acquisitions, hired more than 450 new employees, and won ...