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A surfer without a degree is worth $16 billion after his biotech company's stock soared 1,100% in a year

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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 .

Duggan never graduated from college in the 1960s and never intended to get a degree.

He started building a stake in Pharmacyclics , a maker of cancer drugs, in 2004 after his son's death.