Billionaire hedge fund manager Ken Griffin just raised Citadel's position in global-consulting powerhouse Accenture.

Griffin has been happy with how Sequoia, which is a minority shareholder in Citadel Securities, has helped his market maker.

The era of explosive growth in multistrategy hedge funds is over, according to billionaire Ken Griffin, who runs one of the biggest such firms.

Ken Griffin started the Citadel hedge fund in 1990. In the third quarter, Griffin and Citadel more than tripled its stake in Viking Therapeutics (NASDAQ: VKTX). Wall Street analysts are sticking their necks out and predicting big gains around the corner.

Citadel's founder Ken Griffin said on Thursday that he would be open to selling a small stake in his hedge fund at some point in the future.

Microsoft is a major player in AI through its partnership with OpenAI and its Azure Cloud infrastructure. Citadel sold much of its Microsoft shares earlier this year, amid broader shifts in its investing strategy.

Ken Griffin urged Trump to moderate immigration and inflation policies, warned tax cuts risk debt, and is open to selling a minority stake in Citadel.

Ken Griffin is arguably one of the most successful investors of all time. He made a name for himself when he shorted stocks just ahead of the 1987 market crash that came to be known as "Black Monday." His profits last year topped $7 billion as his returns of roughly 15% outpaced many of his peers.