Worth about fifty billion dollars, he founded Citadel, one of the biggest hedge funds in the world, and Citadel Securities, a hugely profitable “market maker”—a company that generates billions of ...

Leave it to the ultra-wealthy to secretly drop $125 million on a building just to demolish it. Hedge fund billionaire Ken ...

Ken Griffin is taking a fresh shot at New York City Mayor Zohran Mamdani — while voicing willingness to speak with the far-left leader down the road. The Citadel founder on Thursday urged New York’s ...

Billionaire Citadel founder Ken Griffin is encouraging New York's business leaders to take on socialist Mayor Zohran Mamdani, warning that the city's future could be at risk if employers and investors ...

Griffin contributed the largest financial gift to the U.S. men's national team nearly two years ago to secure Mauricio ...

A new exhibition at Pérez Art Museum Miami didn’t begin with the idea of a collector lending paintings to a museum. It began with a realization. Megan Kincaid, curator of the Kenneth C. Griffin ...

Ken Griffin, the hedge fund manager, looks for artworks with a “wow” factor, never mind the number of zeros on the price tag. Ten of his Basquiats are on loan to the Pérez Art Museum Miami. Art ...

Ken Griffin is making a $26 million gift to complete construction of the Theodore Roosevelt Presidential Library in Medora, North Dakota. The $450 million project will share the values and lessons of ...

The gift is one of several Griffin has given to Miami-based nonprofits since moving his hedge fund, Citadel, to Miami.

MEDORA, N.D., June 25, 2026 /PRNewswire/ -- The Theodore Roosevelt Presidential Library (TRPL) today announced a landmark $26 million gift from Kenneth C. Griffin, founder and CEO of Citadel and ...

Intuitive Surgical (ISRG +0.82%) has lagged the market recently. The company is dealing with headwinds from multiple sources. Let's consider three of them. First, Intuitive Surgical will face ...