Chuck Royce's position in White Mountains Insurance Group, Ltd. is currently worth $20.8 Million. That's 0.23% of their equity portfolio (126th largest holding). The first White Mountains Insurance Group, Ltd. trade was made in Q1 2013. Since then Chuck Royce bought shares eight more times and sold shares on eighteen occasions. The stake costed the investor $14.7 Million, netting the investor a gain of 42% so far.