Ken Griffin acquired 331 White Mountains Insurance Group, Ltd. shares worth $577 Thousand. That's 0.00% of their equity portfolio (3244th largest holding). The first White Mountains Insurance Group, Ltd. trade was made in Q1 2014. Since then Ken Griffin bought shares seventeen more times and sold shares on eighteen occasions. The stake costed the investor $492 Thousand, netting the investor a gain of 17% so far.