Simon Property Group, Inc. is an American commercial real estate company, ranked #1 in the United States as the largest real estate investment trust. Simon is a fully integrated real estate company which operates from five retail real estate platforms: regional malls, Premium Outlet Centers, The Mills, community/lifestyle centers and international properties. It currently owns or has an interest in more than 325 properties comprising approximately 241,000,000 square feet (22,400,000 m) of gross leasable area in North America and Asia. The company is headquartered in Indianapolis, Indiana and employs more than 5,000 people worldwide. It is publicly traded on the NYSE under the symbol SPG and is part of the S&P 100.