Costar Group, already the dominant force in commercial real estate data with some 30 acquisitions, including Lands of America, STR, LoopNet, and Apartments.com, has now turned its attention to residential real estate. CoStar, still consider an “outsider” by most everyone, is rapidly becoming an “insider” with its second significant acquisition in the industry — Homes.com for $156 million in April 2021 and Homesnap for $250 million in December. Two high-profile acquisition RentPath and CoreLogic did not proceed but expect more strategic acquisitions to continue.