Ken Griffin's position in Penumbra is currently worth $2.54 Million. That's 0.00% of their equity portfolio (2155th largest holding). The first Penumbra trade was made in Q3 2015. Since then Ken Griffin bought shares 51 more times and sold shares on 40 occasions. The stake costed the investor $2.21 Million, netting the investor a gain of 15% so far.