While much of the media's attention has been squarely focused on Nvidia, longtime tech behemoth Microsoft (NASDAQ: MSFT) is an artificial intelligence (AI) force to be reckoned with as well. Aside from this direct investment,

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.

The Citadel honcho has decamped to Florida — and is in the process of cutting ties with the city that he once called home.

Any list of the greatest hedge fund managers of all time should include Ken Griffin. Today, Citadel ranks among the largest and most successful hedge funds in the U.S. And Griffin is worth around $46.

Citadel Advisors, run by billionaire investor Ken Griffin, is one of the most prestigious hedge funds on Wall Street, and while reviewing the 13F it filed on Nov. 14, I noticed something. In the third quarter, the fund increased its stake by 172% in a semiconductor stock that isn't Nvidia.