Billionaire philanthropist and Citadel CEO Ken Griffin has donated $15 million to Mount Sinai Medical Center to help expand cancer research and treatment in Miami Beach and Hialeah.

The gift will support the under-construction Braman Comprehensive Cancer Center in Miami Beach and a freestanding Emergency ...

Big-name hedge funds had to navigate quant pain and tariff noise in a turbulent July.

Mount Sinai Medical Center today announced a transformational $15 million gift from Kenneth C. Griffin, founder and CEO of Citadel and founder of Griffin Catalyst. The gift supports the new […] The ...

Ken Griffin letter to staff "I am excited to share with you that Citadel is moving its global headquarters to Miami. Miami is a vibrant, growing metropolis that embodies the American Dream ...

Citadel CEO Ken Griffin speaks during the Semafor World Economy Summit 2025 at Conrad Washington on April 23, 2025 in Washington, DC.

Billionaire investor Ken Griffin is placing a major bet on a company that's far outperformed expectations this year.

Griffin, 56, built Citadel from a Harvard dorm‑room trading venture in 1990 into a multistrategy powerhouse managing about $65 billion in investment capital and employing more than 3,100 people.

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 ...

Ken Griffin, the founder and CEO of Citadel, said he doesn't think AI will revolutionize the investment business. "Do we use it in our investment business? A little bit, a little bit.

Billionaire philanthropist and Citadel CEO Ken Griffin has donated $15 million to Mount Sinai Medical Center to help expand cancer research and treatment in Miami Beach and Hialeah. The donation ...

Billionaire investor Ken Griffin's hedge funds at Citadel have all posted positive returns during a volatile 2025, led by the tactical trading fund. Citadel's multistrategy Wellington fund, its ...