G4S

G4S is a British multinational private security company headquartered in London, England, and a subsidiary of Allied Universal. The company was set up in July 2004 when London-based Securicor amalgamated with Danish firm Group 4 Falck (itself the result of a merger between Group 4 and the former security division of Falck a few years prior). The company offers a range of services, including the supply of security personnel, monitoring equipment, response units and secure prisoner transportation. G4S also works with governments overseas to deliver security services. G4S was the world's largest security company measured by revenues before Allied Universal acquired it. It has operations in more than 90 countries. With over 533,000 employees, by 2012 it was the largest European and African private employer. The company has been criticised and involved in numerous controversies. Formerly a dual-listed company with listings on the Copenhagen and London stock exchanges, G4S was purchased by Allied Universal in April 2021.