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 ...

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.

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 ...

Ken Griffin just snapped up two more impressive pieces of U.S. history.

Ken Griffin’s massive Palm Beach estate is now considered the most expensive in the world, valued at $1 billion. TNS. Griffin, who knows the wealthy enclave of Palm Beach intimately, ...

Billionaire Ken Griffin, an ardent foe of billionaire Democratic Gov. J.B. Pritzker, declared Wednesday he was “all in” to back a candidate running to defeat the governor next year. But ...

Ad Policy. CNBC’s Andrew Ross Sorkin interviews Kenneth C. Griffin, the founder and CEO of Citadel, at the CNBC Institutional Investor Delivering Alpha conference on July 18, 2018, in New York City.

Ken Griffin, the founder and CEO of Citadel, on Nov. 5, 2014. “Richard Irvin is the best person to lead our state in this election cycle,” Griffin said. “This is not just about beating J.B.