Andreas Halvorsen, CEO of Viking Global. (Scott Eells/Bloomberg) Friday turned out to be a big day for Tiger Cub Andreas Halvorsen’s Viking Global Investors, with two IPOs in which the hedge fund held large stakes rocketing on their first day of trading. Meanwhile, another biopharma in which it holds a smaller position has more than doubled in price since it To continue reading, subscribe now to Premium Journalism. Already a subscriber? Login. Related Content