Zohran Mamdani wants Ken Griffin to pay more tax on his Central Park penthouse. We break down what it means for homeowners ...

Success Academies, the New York City charter network, is expanding to Florida following a billionaire-backed lobbying spree to secure key funding and real estate.

An internal company memo revealed the person is a neurologist who previously worked at Morgan Stanley and is a Harvard grad.

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

This year, it passed UBS to become the largest of “dark pools”—those off-exchange platforms where institutions can trade ...

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

Billionaire developer and Palm Beach resident Ken Griffin's most recent purchases include rare copies of the Emancipation ...

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 ...

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.

Citadel's Ken Griffin said he doesn't think AI will shake up the investment business. Griffin said his hedge fund uses AI "a little bit." AI works well in short-term trading but falls short when ...

Ken Griffin, founder of hedge fund Citadel, on Friday sharpened his criticism of the Trump administration’s trade policies, arguing that tariffs will not revive American manufacturing jobs as ...

Citadel's best year ever was 2007, because its flagship fund, Kensington, rose 30%. Part of the explanation for these healthy returns was Griffin's talent for steering clear of investing fads.