Jim Simons acquired 6.76 Million Merck & Co shares worth $587 Million. That's 0.72% of their equity portfolio (13th largest holding). The first Merck & Co trade was made in Q3 2013. Since then Jim Simons bought shares sixteen more times and sold shares on fifteen occasions. The stake costed the investor $554 Million, netting the investor a gain of 6.0% so far.