32. DONALD BREN

$17  SELF-MADE SCORE: *

BILLION SOURCE: REAL ESTATE AGE: 87 RESIDENCE: NEWPORT BEACH, CA PHILANTHROPY SCORE: The nation’s richest real estate baron owns 550 office buildings and 125 apartment complexes through his Irvine Company, mostly in Orange County, California. He also owns the Metlife Building in Manhattan. Bren went to college on a skiing scholarship and spent three years as a U.S. Marine Corps officer. He built his first house in 1958 with a $10,000 bank loan.