Ventas, Inc. is a real estate investment trust (REIT). The Company has a portfolio of seniors housing and healthcare properties located throughout the United States, Canada and the United Kingdom. The Company operates through three segments: triple-net leased properties, senior living operations and MOB operations. The triple-net leased properties segment invests in seniors housing and healthcare properties throughout the United States and the United Kingdom and lease those properties to healthcare operating companies under triple-net or absolute-net leases that obligate the tenants to pay all property-related expenses. The senior living operations segment invests in seniors housing communities throughout the United States and Canada and engages independent operators, such as Atria and Sunrise, to manage those communities. The MOB operations segment, acquires, owns, develops, leases, and manages MOBs throughout the United States. It invests in seniors housing and healthcare properties.