Not even Valeant's turbulent fourth quarter could hold back Viking Global in 2015.
Ole Andreas Halvorsen's Viking Global Equities fund posted returns of 8.3 percent and the Viking Long Fund saw gains of 4.5 percent for 2015, topping benchmarks and putting Viking in the position of being one of the few funds that made money last year, according to documents obtained by CNBC.com.
But its position in the troubled pharma company proved costly.
"Valeant, a stock we have owned since 2010, was our biggest loser in the quarter, costing each fund 1.6 percent after having been a top five contributor in 2011 and 2013," Viking said in its investor letter. "While we were disappointed by the revelations, our subsequent diligence suggested that the improprieties alleged in the media, such as operating without proper licenses, were isolated to Philidor and do not extend to other Valeant business lines."