You do the math. Tom Leighton, a professor at MIT's Laboratory for Computer Science, or LCS, holds nearly 10 million shares in Akamai Technologies, a company he co-founded in August 1998. Last October, Akamai went public, with prices at the initial public offering (IPO) starting off at $26 a share; by the end of the day, investors had bid the price up to $145 a share. A month later the stock was selling at $327 a share. No matter how much math anxiety you might have, you get the point-Tom Leighton had become a very rich man.

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