Simon Property Group is the second- largest real estate investment trust in the United States. Its portfolio includes an interest in 207 properties: 119 traditional malls, 69 premium outlets, 14 Mills centers (a combination of a traditional mall, outlet center, and big-box retailers), six lifestyle centers, and five other retail properties. Simon's portfolio averaged $693 in sales per square foot over the 12 months prior to the pandemic. The company also owns a 21% interest in Klepierre, a European retail company with investments in shopping centers in 16 countries, and joint venture interests in 33 premium outlets across 11 countries.