Mario Gabelli acquired 92k W.R. Berkley shares worth $6.71M. That's 0.06% of their equity portfolio (291st largest holding). The first W.R. Berkley trade was made in Q1 2012. Since then Mario Gabelli bought shares fifteen more times and sold shares on 38 occasions. The stake costed the investor $1.76M, netting the investor a gain of 281% so far.