Chuck Royce's position in White Mountains Insurance Group, Ltd. is currently worth $28.5 Million. That's 0.26% of their equity portfolio (109th 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 fourteen occasions. The stake costed the investor $20.5 Million, netting the investor a gain of 39% so far.