Simon Property Group, Inc. is a self-administered and self-managed real estate investment trust (REIT). The Company owns, develops and manages retail real estate properties, which consist primarily of malls, Premium Outlets and The Mills. Simon Property Group, L.P. (Operating Partnership), is the Company's partnership subsidiary that owns all of its real estate properties and other assets. As of December 31, 2016, the Company owned or held an interest in 206 income-producing properties in the United States, which consisted of 108 malls, 67 Premium Outlets, 14 Mills, four lifestyle centers, and 13 other retail properties in 37 states and Puerto Rico. As of December 31, 2016, it had redevelopment and expansion projects, including the addition of anchors, big box tenants, and restaurants, underway at 27 properties in the United States and it had one outlet and one other retail project under development.