Joel Greenblatt acquired 36.2 Thousand Clean Harbors shares worth $8.37 Million. That's 0.07% of their equity portfolio (382nd largest holding). The first Clean Harbors trade was made in Q1 2014. Since then Joel Greenblatt bought shares 21 more times and sold shares on fifteen occasions. The stake costed the investor $3.36 Million, netting the investor a gain of 149% so far.