Ken Griffin's position in Alnylam Pharmaceuticals is currently worth $17.2 Million. That's 0.02% of their equity portfolio (880th largest holding). The first Alnylam Pharmaceuticals trade was made in Q2 2013. Since then Ken Griffin bought shares 47 more times and sold shares on 50 occasions. The stake costed the investor $14.5 Million, netting the investor a gain of 18% so far.