Ken Griffin acquired 7.9 Thousand Markel Group shares worth $15 Million. That's 0.02% of their equity portfolio (963rd largest holding). The first Markel Group trade was made in Q2 2013. Since then Ken Griffin bought shares 35 more times and sold shares on 40 occasions. The stake costed the investor $10.1 Million, netting the investor a gain of 48% so far.