Simon Property Group, Inc. (NYSE: SPG) is an Indiana real estate investment trust and an S&P 100 company that owns, develops and manages premier shopping, dining, entertainment and mixed-use destinations — primarily malls, Premium Outlets and The Mills. As of December 31, 2025 it owned or held an interest in 212 income-producing properties in the United States (38 states and Puerto Rico) and 42 properties internationally, and it and its affiliates employed about 3,600 people. The business traces to Melvin Simon & Associates, founded in 1960; after the death of longtime CEO David Simon, the board appointed Eli Simon as Chief Executive Officer and President effective March 23, 2026.