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 ...

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 ...

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

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

Citadel boss Ken Griffin scoops up Abraham Lincoln-signed Emancipation Proclamation, 13th Amendment for $18.1M By Ariel Zilber Published June 30, 2025, 4:29 p.m. ET ...

Ken Griffin Pays Record $13.7 Million for Lincoln’s 13th Amendment Ending Slavery The hedge-fund billionaire also paid a record $43.2 million for a copy of the U.S. Constitution four years ago By ...

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

Hedge fund titan Ken Griffin ramped up his war of words with the Trump White House on Wednesday, blasting the president's so-called 'Big, Beautiful' tax bill for adding to Uncle Sam's eye-popping ...

Ken Griffin, the founder and CEO of Citadel Securities who backed Donald Trump in 2024 election, is taking issue with the president’s tariff policy.

Billionaire Ken Griffin, founder of $63 billion (in assets) Citadel hedge fund and market maker Citadel Securities, slammed the Trump Administration’s handling of the economy and the Republicans ...