(Corrects to show revenue rise is on constant currency basis, removes reference to first revenue rise in 4 years)
March 8 (Reuters) - British security company G4S Plc reported a 6.3 percent rise in revenue on a constant currency basis for 2016 and cut its leverage to 2.8 times net debt over EBITDA from 3.4 times a year earlier.
Revenue from continuing business rose to 6.82 billion pounds from 6.42 billion on a constant currency basis.
The United States became its biggest market by country for the first time, a company spokesman said.
Pretax profit rose to 352 million pounds ($429.62 million) from 309 million. ($1 = 0.8193 pounds) (Reporting by Abhijith Ganapavaram in Bengaluru; editing by Jason Neely)