ANTHONY WOOD

$3.9

BILLION  SELF-MADE SCORE: * SOURCE: STREAMING TECHNOLOGY AGE: 53 RESIDENCE: PALO ALTO, CA PHILANTHROPY SCORE: The Roku CEO had a banner year; shares of the hardware and streaming service company he founded have quintupled since January. Wood, a serial entrepreneur, also founded digital video recorder firm ReplayTV in 1997 and sold it in 2001. He learned to code before high school.