Ken Griffin
Hedge funds · Miami, Florida
Net worth
$57.4B
Today
$00.00%Past month
−$89M−0.16%As of Nov 11, 2026, 1:50 PM EST
Ken Griffin founded and runs Citadel, a Miami-based hedge fund firm that manages $77 billion in assets. Griffin 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. Citadel is the world's most profitable hedge fund and has generated $90 billion in net gains since inception in 1990, according to LCH Investments. Citadel Securities, one of Wall Street's biggest market-making firms, is responsible for one of every four stock trades in the U.S. Griffin has given some $2.7 billion to philanthropic causes. Recent beneficiaries include Success Academy, Memorial Sloan Kettering Cancer Center and nonprofit hospitals in Miami.
Net worth over time
Principal holdings
1 positions| Company | Industry | Share | Value |
|---|---|---|---|
Private holdings | Finance & Investments | 100.0% | $57.4B |
Also known for
- Griffin bought rare editions of the Emancipation Proclamation and the Thirteenth Amendment, signed by Abraham Lincoln, to be loaned for public display in 2025.
- Griffin's first job was selling Franklin Mint collectibles.