Ken Griffin

(Newser) - Billionaire Ken Griffin, who has several very nice homes, has just added a crown jewel—one that cost roughly $9,917 per square foot. The Citadel hedge fund founder has purchased the penthouse at 220 Central Park South in New York City for $238 million, making it the priciest home...

(Newser) - Chicago hedge fund billionaire Ken Griffin and his money manager wife are embroiled in a contentious divorce, and the couple's battles over money had CNBC last month asking, "How can three kids under age 10 cost $1 million a month?" That after court papers indicated Anne Dias Griffin...

(Newser) - An increasingly familiar Wall Street phenomenon—a three-digit swing in the Dow, usually down, in the final hour of trading—is a direct result of population growth in one species: bears. Margin calls are forcing panicked sell-offs, it's true, but the situation is more complicated than that, experts tell...

(Newser) - Portfolio magazine debuts with a look inside Citadel Investment Group, the $13.5 billion Chicago hedge fund that's even more press-shy than most of its brethren. A rare chat with founder Ken Griffin reveals that he's thinking of taking Citadel public —which the magazine notes could be the biggest...