Ken Griffin acquired 71.8 Thousand Clean Harbors shares worth $13.9 Million. That's 0.01% of their equity portfolio (961st largest holding). The first Clean Harbors trade was made in Q2 2013. Since then Ken Griffin bought shares 42 more times and sold shares on 49 occasions. The stake costed the investor $11.8 Million, netting the investor a gain of 18% so far.