G4S plc (formerly Group 4 Securicor) is a British multinational security services company headquartered in London, England.

The company was set up in 2004 when London-based company Securicor amalgamated with Danish business Group 4 Falck. 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.

G4S is the world’s largest security company measured by revenues. It has operations in more than 90 countries. With over 570,000 employees, it is the world’s third-largest private employer, the largest European and African private employer, and among the largest on the London Stock Exchange. G4S has a primary listing on the London Stock Exchange and is a constituent of the FTSE 250 Index.

Type:                     Public limited company

Traded as:           LSE: GFS; Nasdaq Copenhagen: G4S

Industry:              Security

Predecessors:   Group 4 Falck, Securicor

Founded:            1901 (119 years ago) 2004 (16 years ago) (current form)

Headquarters:   London, England, UK

Area served:      Worldwide

Services:              Manned security services, cash handling services, justice services and outsourced business processes related to security and safety risks.

Subsidiaries:       G4S Secure Solutions

Website               www.g4s.com  www.g4s.com/en-in