226. Henry Nicholas III
$3.3 billion self-made score: * source: semiconductors age: 58 residence: newport coast, calif. Ph.d., ucla ’98 Nicholas cofounded semiconductor firm Broadcom in 1991 with fellow billionaire Henry Samueli (No. 186). He supports education via his Nicholas Academic Centers in Santa Ana, California, and has sent about 800 underprivileged high school students to college.