Ken Griffin acquired 31.2 Thousand W.R. Berkley shares worth $2.43 Million. That's 0.00% of their equity portfolio (2064th largest holding). The first W.R. Berkley trade was made in Q2 2013. Since then Ken Griffin bought shares 45 more times and sold shares on 45 occasions. The stake costed the investor $2.12 Million, netting the investor a gain of 15% so far.