Andreas Halvorsen

Andreas Halvorsen runs hedge fund Viking Global Investors.

A former Tiger Cub who once traded equities at Julian Robertson's Tiger Management, he struck out on his own with Viking in 1999.

The Connecticut-based firm now manages more than $25 billion in assets.

After flagship Viking Global hedge fund lost 4% net of fees in 2016, Halvorsen parted with CIO Daniel Sundheim and returned $8 billion to investors.

In 2017 Viking's main hedge fund returned about 12% net of fees, driven by its long positions.