An internal company memo revealed the person is a neurologist who previously worked at Morgan Stanley and is a Harvard grad.

The stock market has proven resilient in the face of President Donald Trump's aggressive trade war and conflict in the Middle ...

Zohran Mamdani wants Ken Griffin to pay more tax on his Central Park penthouse. We break down what it means for homeowners ...

Billionaire hedge fund manager Ken Griffin added two of the most iconic artifacts in American history to his growing ...

Ken Griffin’s hedge fund Citadel has been outshone by smaller rivals so far this year, as the firm was stung by the market ...

Citadel's Ken Griffin breaks Sotheby's record with bids for two Civil War-era documents. Crain’s Laura Turbay discusses with ...

Billionaire developer and Palm Beach resident Ken Griffin's most recent purchases include rare copies of the Emancipation ...

Griffin reportedly plans to lend his copies of the Thirteenth Amendment and the Emancipation Proclamation to a US institution ...

The hedge fund billionaire, who voted for Trump, said the Republicans’ “Big Beautiful Bill” “will unquestionably add several ...

Citadel founder and CEO Ken Griffin told graduates there's no shame in switching careers if they're not truly interested in ...

The hedge-fund billionaire also paid a record $43.2 million for a copy of the U.S. Constitution four years ago.