Prem Watsa's position in MerckInc is currently worth $21.7 Million. That's 1.39% of their equity portfolio (10th largest holding). The first MerckInc trade was made in Q4 2009. Since then Prem Watsa bought shares three more times and sold shares on one occasions. The stake costed the investor $13.7 Million, netting the investor a gain of 58% so far.