Mario Gabelli acquired 97.3 Thousand W.R. Berkley shares worth $7.06 Million. That's 0.08% of their equity portfolio (259th 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 36 occasions. The stake costed the investor $1.86 Million, netting the investor a gain of 278% so far.