Ken Griffin acquired 3 Thousand Great Lakes Dredge & Dock shares worth $21.4 Thousand. That's 0.00% of their equity portfolio (4752nd largest holding). The first Great Lakes Dredge & Dock trade was made in Q2 2013. Since then Ken Griffin bought shares 36 more times and sold shares on 33 occasions. The stake costed the investor $20 Thousand, netting the investor a gain of 7.0% so far.