G4S plc was a global security and facilities services company headquartered in the United Kingdom. The company provided security personnel, monitoring and response services, cash management, secure transportation, and related risk-management solutions to businesses, governments, and other organizations.
G4S also operated in areas including electronic security systems, integrated security solutions, corrections and detention services, and facilities management. Its activities extended across multiple geographic regions, including Europe, Africa, the Middle East, Asia-Pacific, and the Americas, with services tailored to commercial, public-sector, infrastructure, and financial-services customers.
G4S was created in 2004 through the merger of Group 4 Falck and Securicor. Under chief executive Ashley Almanza, the company expanded its international security-services operations before being acquired by Allied Universal in 2021. G4S subsequently ceased to operate as an independent publicly listed company, although its former securities may continue to appear in over-the-counter market listings.
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