The Shorenstein Company, LLC, is one of the United States' largest and oldest privately owned real estate firms, owning interests in, or managing, some 20 million square feet (2,000,000 m²) of office space. 7 million square feet (650,000 m²) of their space is in San Francisco, California, making it one of the city's largest office landlords.
Founded by Walter Shorenstein after World War II, who died of natural causes on 6/25/2010, the company is now owned by his son, chairman and CEO Douglas Shorenstein. The President of the company is Glenn A. Shannon.