Ventas, Inc. engages in the acquisition and ownership of seniors housing and healthcare properties. It operates through the following segments: Senior Housing Operating Portfolio (SHOP), Outpatient Medical and Research Portfolio (OM&R), and Triple-net Leased Properties (NNN). The SHOP segment is involved in owning and investing in senior housing communities throughout the United States and Canada. The OM&R segment refers to acquiring, owning, development, leasing and managing outpatient medical buildings and research centers throughout the United States. The NNN segment focuses on investing and owning senior housing communities, skilled nursing facilities, long-term acute care facilities, freestanding inpatient rehabilitation facilities, and other healthcare facilities throughout the United States and the United Kingdom. The company was founded in 1983 and is headquartered in Chicago, IL.