Ken Griffin

Ken Griffin founded and runs Citadel, a Chicago-based hedge fund firm that manages roughly $39 billion in assets.

He founded Citadel in 1990 but first began trading from his Harvard dorm in 1987. He put a satellite dish on the roof to get real-time stock quotes.

He is the founder of Citadel Securities, one of Wall Street's biggest market-making firms, responsible for one of five stock trades in the U.S.

During the pandemic, Griffin funded the State Department's rescue of 800 U.S. citizens from Wuhan and donated $45 million to community initiatives in cities like Chicago and Miami.

Griffin has given $1.3 billion to philanthropic causes.