What are the top three security companies in the world?

Who are the top three security companies in the world? G4S Jefferies, Securitas Secco Lida and Allied Universal United Global.

Detailed introduction:

The largest security company in the world: G4S Jefferies.

G4S Jefferies was originally an old British security company, and now it has been acquired by Americans. Founded in 2004, the company was formed by the merger of Securicor, then headquartered in London, and Group 4 Falck, then located in Denmark.

G4S is the third largest private enterprise in the world, with 657,000 employees in 125 countries, second only to Wal-Mart and Hon Hai Group. From protecting Iraqi government officials to safeguarding the interests of multinational companies in Africa, from providing security systems for the Pentagon to protecting cargo ships in the Indian Ocean from pirates, these services are among the services provided by G4S.

Securitas Secco Lida, the second largest securities company in the world.

Secco Lida Company was founded in 1934, and initially expanded by acquiring several small Swedish securities companies. The company is listed on the Stockholm Stock Exchange.

The company mainly provides professional security services in North America, Europe and Iberia, including brand protection, due diligence, background investigation, security assessment, intellectual property protection, executive protection, investigation, network monitoring, computer forensics, social compliance and IT security. The company is the parent company of Pinkerton Detective Office.

The third largest security company in the world: United Global United Global

United globe was founded in Pittsburgh, Pennsylvania on 1957. At first, it was a security service company, providing security when needed.

20 16 company was merged by American global service company and United Burton security service company. It is the largest security service provider in the United States, with 140000 trained police officers. The company provides security products and services, including access control, intrusion, alarm detection and IP-based video system, gatekeeper, transition planning, green cleaning and staffing services.