A surfer who never graduated from college has made billions in the biotech industry. Summit Therapeutics CEO Bob Duggan is worth about $16 billion after a 1,100% stock gain in 12 months. Duggan, 80, ranks 129th on the global rich list and is the 23rd biggest wealth gainer this year.

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You can opt-out at any time by visiting our Preferences page or by clicking "unsubscribe" at the bottom of the email. Advertisement A surfer without a college degree has gone from baking cookies to building robots, minting billions in biotech , and ranking among the world's richest people. Bob Duggan, 80, is the co-CEO and chairman of Summit Therapeutics, a cancer drug developer .

He has tripled his net worth to $15.9 billion this year, making him the 23rd biggest wealth gainer of 2024 and the 129th richest person on the planet, per the Bloomberg Billionaires Index as of Thursday. This story is available exclusively to Business Insider subscribers.

Become an Insider and start reading now. Have an account? Log in . His net worth has soared thanks to his more than 550 million shares of Summit, a roughly 75% stak.