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 ...

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

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

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

The hedge fund founder paid $13.7 million for a copy of the 13th Amendment and $4.4 million for the Emancipation Proclamation ...

Griffin, the founder and chief executive of Citadel, broke the auction record for a Lincoln-signed document.

Griffin reset the record for any document signed by Lincoln when he paid Sotheby’s $13.7 million on Thursday for a rare, handwritten copy of the 13th Amendment.

Citadel founder Ken Griffin paid $18.1 million for copies of the 13th Amendment and the Emancipation Proclamation signed by President Abraham Lincoln.

Citadel founder and CEO Ken Griffin slammed the Trump administration for pushing the economy towards a stagflation scenario. What Happened: Asked about the GOP reconciliation bill at the Forbes ...

Griffin's and Englander's hedge funds bought Palantir shares hand over fist in Q1. However, many Wall Street analysts aren't so bullish about the stock -- mainly because of valuation concerns.