The CME Group, operator of the Chicago Mercantile Exchange, is one of the world's largest traders of derivatives.

VOA: special.2011.02.18

After two men died of heat-related causes in Moscow's metro, a consumer group sued the transit operator to bring down temperatures to the legal maximum of 32 degrees centigrade.

VOA: standard.2010.07.23

Exchange operator CME Group and Citadel Investment Group are hoping to change that.

FORBES: Magazine Article

It bought Europe's third-biggest mobile phone operator, Orange, in 2000 from UK mobile phone operator Vodafone Group, Europe's biggest mobile phone company.

CNN: Telecom operators: France Telecom

Another UK prison operator, Group 4, is also expanding into southern Africa.

BBC: Criminal justice reshaped