ADT Stock (NYSE:ADT) Jumps After 2 Big Companies Show Interest When bigger companies invest in a smaller one, traders tend to take notice. Since well-known insurer State Farm is making a major investment in ADT (NYSE: ADT), this should garner attention for the latter company among enterprising investors. Search engine innovator Google, which is owned by Alphabet (NASDAQ: GOOG)(NASDAQ: GOOGL), is also taking a financial position in ADT, so there must be something promising about this security specialist that retail traders aren''t seeing. In light of these developments, I am bullish on ADT stock. ADT is a security system provider for homes and businesses, as well as an installer of smart-home technology.