Joel Greenblatt acquired 178 Thousand Merck & Co shares worth $15.9 Million. That's 0.55% of their equity portfolio (11th largest holding). The first Merck & Co trade was made in Q1 2011. Since then Joel Greenblatt bought shares 22 more times and sold shares on 21 occasions. The stake costed the investor $10.6 Million, netting the investor a gain of 50% so far.