Net Worth: $1.15 billion
Born in Taiwan, Yang moved to the U.S. at age 10. He created his Web directory in 1994 with partner David Filo when both were Stanford grad students. Yahoo cofounder made his debut among America's 400 richest at age 29. Still with Yahoo, but no longer its head honcho. He sits on other boards and makes a number of charitable donations.
(AP Photo/J. Scott Applewhite)