Joel Greenblatt acquired 38.6k Clean Harbors shares worth $9.47M. That's 0.05% of their equity portfolio (481st largest holding). The first Clean Harbors trade was made in Q1 2014. Since then Joel Greenblatt bought shares 22 more times and sold shares on fifteen occasions. The stake costed the investor $3.65M, netting the investor a gain of 159% so far.