Timothy Springer

Net worth:$2.1 billion

Citizenship: U.S.

Source of wealth: Biotechnology

Springer was a founding investor in Moderna Therapeutics in 2010, putting $5 million into the firm. The 3.5% he owns of the company was worth $1.6 billion a decade later. He joined the billionaires club in 2020, following a 12% rise in Moderna’s stocks as a result of positive developments in its COVID-19 vaccine trails. Between March 2020— when WHO declared COVID-19 a pandemic—and May, the firm’s stocks more than tripled. Besides Moderna, the Harvard Medical School professor is an investor in three other biotech companies: Selecta Biosciences, Scholar Rock and Morphic Therapeutic.