Apartment Investment and Management Company (Aimco) is a real estate investment trust headquartered in Denver, Colorado owning and operating a geographically diversified portfolio of apartment communities through 19 regional operating centers. Aimco, through its subsidiaries, operates approximately 1,800 properties, including approximately 327,000 apartment units, and serves approximately one million residents each year. Aimco''s properties are located in 47 states, the District of Columbia and Puerto Rico.