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

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

Originally issued by Lincoln during the Civil War in 1863, the proclamation declared enslaved people in the Confederate ...

Ken Griffin bought an Abraham Lincoln–signed copy of the 13th Amendment, for $13.7 million, and the Emancipation Proclamation ...

Griffin paid a record $13.7M for the 13th Amendment and $4.4 million for the Emancipation Proclamation. Both documents were ...

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

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

Citadel founder Ken Griffin said he was asked on a recent trip to Asia why the US was trying to be like China.

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

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

Citadel CEO Ken Griffin, a billionaire supporter of President Donald Trump and a megadonor to Republican candidates, had some unusually harsh words for the president about his trade war: It’s ...