As of my knowledge cutoff in September 2021, the largest security company in South Africa was G4S (Group 4 Securicor). G4S is a multinational security services company that operates in more than 90 countries, including South Africa. It offers a wide range of security solutions, including manned guarding, armed response, access control, electronic security systems, cash handling, and more.
However, it’s important to note that the security industry is dynamic and subject to changes over time. Other notable security companies in South Africa include ADT, Fidelity Security Services, Chubb Security, and Pro-Active South Africa, among others. Market dynamics, mergers, acquisitions, and industry developments can influence the rankings and positions of security companies over time. It’s always a good idea to research the current market landscape and consult industry reports or contact relevant authorities for the most up-to-date information.