Mario Gabelli's position in Great Lakes Dredge & Dock is currently worth $340k. That's 0.00% of their equity portfolio (822nd largest holding). The first Great Lakes Dredge & Dock trade was made in Q4 2012. Since then Mario Gabelli bought shares seven more times and sold shares on three occasions. The stake costed the investor $314k, netting the investor a gain of 8.1% so far.