Jim Simons's position in Clean Harbors is currently worth $33.8 Million. That's 0.05% of their equity portfolio (409th largest holding). The first Clean Harbors trade was made in Q2 2013. Since then Jim Simons bought shares 22 more times and sold shares on nineteen occasions. The stake costed the investor $10.2 Million, netting the investor a gain of 231% so far.