Ken Griffin's position in Regeneron Pharmaceuticals is currently worth $109 Million. That's 0.11% of their equity portfolio (227th largest holding). The first Regeneron Pharmaceuticals trade was made in Q2 2013. Since then Ken Griffin bought shares 60 more times and sold shares on 51 occasions. The stake costed the investor $105 Million, netting the investor a gain of 4.6% so far.