The S&P 500 soared more than 32% in 2013, and several big pharma companies, namely Bristol-Myers Squibb (BMY +0.18%), AbbVie (ABBV 0.15%), Roche (RHHBY 0.95%), Johnson & Johnson (JNJ +1.03%), and AstraZeneca (AZN 2.17%) also performed extraordinarily well. The following slideshow reveals why these companies beat out their big pharma peers and what drove their strong performances in 2013.
