Top Richest Man 12

Donald Bren made most of his money from Irvine Co., a real estate investment company which is the largest private landowner in the state of California. Irvine Co. owns 46.5 million feet of office property as well as 160 apartment complexes, not to mention retail centers, golf courses, hotel resorts, and marinas. About .3 billion of his net worth is from office properties and he owns about $2.1 billion worth of shopping centers and retail properties.