Ken Griffin built Citadel into a powerful and hugely profitable player in the markets and is moving it to Miami. Here's what drives him. "JB? JB and I are not on speaking terms these days," said ...

Ken Griffin has sent legal letters threatening Sony Pictures over the representation of his company, Citadel, in “Dumb Money.” Citadel's involvement in the GameStop short squeeze event ...

Donald Trump’s tariffs are a “huge policy mistake” that will end up hurting America’s middle class, the hedge fund ...

Ken Griffin's hedge fund is up over 30% this year, even while the broader market has sunk double digits over the same timeframe. October was another month of gains for Citadel's flagship hedge ...

Here’s a look at what Wall Street’s most prominent leaders are saying: Ken Griffin, a major Republican donor, called Trump’s ...