Viking Global Investors
Viking Global Investors is an American-based hedge fund based in Greenwich, Connecticut.
It was established in October 1999 by its CEO and risk manager, Ole Andreas Halvorsen, Brian T Olson and David C Ott. In July 2014, they had $28.8 billion under management.
On June 12, 2017, Viking Global Investors announced that it was returning $8 billion to investors to "reset to a smaller size."