Securitas AB is a security services (security guarding and mobile patrolling), monitoring, consulting and investigation group, based in Stockholm, Sweden. The group has approximately 300,000 employees in 50 countries in North America, Europe, Latin America, Asia, the Middle East and Africa. Securitas AB is listed at Nasdaq OMX Stockholm, large cap segment. In 2010, the group had total sales of 61,340 MSEK and an operating income of 3,724 MSEK.

Securitas AB was founded in 1934 in Helsingborg, Sweden, as AB Hälsingborgs Nattvakt, when Erik Philip-Sörensen bought a small guarding company. In 1935, the name was changed to Förenade Svenska Vakt AB. The company expanded through acquisitions of several small security companies, initially in southern Sweden.

In 1949, AB Securitas Alarm was founded as the company's security-technology subsidiary, and during the following decade, the company started expanding internationally.

In 1972, the group was rebranded as Securitas, the Roman goddess of security and stability, with a logotype consisting of three red dots and the word "Securitas." The dots are described as representing the group's core values of "Integrity, Vigilance and Helpfulness."