AvalonBay Communities, Inc. operates as a real estate investment trust, which engages in the development, redevelopment, acquisition, ownership, and operation of multifamily communities. It operates through the following segments: Established Communities, Other Stabilized Communities, and Development or Redevelopment Communities. The Established Communities segment refers to the operating communities that were owned and had stabilized occupancy. The Other Stabilized Communities segment includes all other completed communities that have stabilized occupancy. The Development or Redevelopment Communities segment consists of communities that are under construction. The company was founded by Gilbert M. Meyer in 1978 and is headquartered in Arlington, VA.