Guarding company Kjøbenhavn Frederiksberg Nattevagt founded in Denmark, and begins to grow internationally.
Security companies Securicor and Group 4 emerge, and grow throughout Europe.
Group 4 Securitas enters the U.S. market by purchasing American Magnetics Corp.
American Magnetics Corp. rebrands as AMAG.
Group 4 Falck purchases The Wackenhut Corporation, the second-largest security services company in the US.
Group 4 Falck merges with Securicor to establish Group 4 Securicor.
Group 4 Securicor rebrands as G4S.
G4S acquires Touchcom, Inc (now part of G4S Secure Integration), MJM Investigations, Inc. (becomes G4S Compliance & Investigations), and RONCO Consulting Corporation.
G4S acquires Adesta, a U.S.-based security integrator, and Sunshine Youth Services (becomes G4S Youth Services).
The Wackenhut Corporation rebrands as G4S Secure Solutions (USA) Inc. G4S acquires Western Investigations Pty Limited Australia, (part of G4S Compliance & Investigations), and Nuclear Security Services Company (NSSC) (part of G4S Secure Integration).
G4S acquires The Cotswold Group, merging with G4S Compliance & Investigations. Adesta rebrands as G4S Technology, LLC.
G4S Technology rebrands as G4S Secure Integration.