ADT Inc., formerly The ADT Corporation, is an American company that provides residential, small and large business electronic security, fire protection, and other related alarm monitoring services throughout the United States. The corporate head office is located in Boca Raton, Florida.

 In February 2016, the company was acquired by Apollo Global Management for $6.9 billion in a leveraged buyout.

Traded as:           NYSE: ADT;  Russell 1000 Component

Industry:              Burglary, Fire and Carbon Monoxide detection, Health safety, Cybersecurity, Fire suppression, Security systems, Communication systems, Video surveillance, Access control, Radio frequency identification, Electronic article surveillance

Founded:            1874; 146 years ago (as American District Telegraph)

Headquarters:   Boca Raton, Florida, U.S.

Website:              www.adt.com