Health Care REIT, Inc. is a real estate investment trust (REIT) that invests in senior housing and health care real estate. It also provides a range of property management and development services. As of March 31, 2008, the Company had 633 properties located in 39 states. The Company’s primary property types include investment properties and medical office buildings. Investment properties are those, in which the Company do not participate in the management of the property and are primarily land, building, improvements and related rights that are leased to operators under long-term operating leases. The Company’s medical office building properties are leased to tenants under gross leases, modified gross leases or triple-net leases, to multiple tenants, and require a certain level of property management. The Company through its subsidiary, HCN Development Services Group, Inc. (DSG), develops specialty medical properties.