Mario Gabelli acquired 99.2 Thousand Casella Waste Systems shares worth $11.8 Million. That's 0.13% of their equity portfolio (186th largest holding). The first Casella Waste Systems trade was made in Q4 2007. Since then Mario Gabelli bought shares fifteen more times and sold shares on 30 occasions. The stake costed the investor $391 Thousand, netting the investor a gain of 2909% so far.