American Assets Trust, Inc. is a real estate investment trust. It owns, operates, acquires, and develops retail shopping centers, office properties, mixed-use properties, and multifamily properties. It operates through the following business segments: Office, Retail, Multifamily, and Mixed-Use. The Office segment includes rental of office space. The Retail segment includes rental of retail space. The Multifamily segment includes rental of apartments. The Mixed-Use segment includes rental of retail space and other tenant services. The company was founded on July 16, 2010 and is headquartered in San Diego, CA.