Jim Simons acquired 6.16M Alkermes plc shares worth $277M. That's 0.38% of their equity portfolio (31st largest holding). The investor owns 3.70% of the outstanding Alkermes plc stock. The first Alkermes plc trade was made in Q2 2013. Since then Jim Simons bought shares 25 more times and sold shares on twenty occasions. The stake costed the investor $164M, netting the investor a gain of 69% so far.