Renaissance Technologies (RenTech)'s CLH Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC) currently holds 82,202 shares of Clean Harbors, Inc. (CLH) worth $24.56 M, representing 0.03% of the portfolio. First purchased in 2013-Q2, this long-term strategic position has been held for 51 quarters.
Based on 13F filings since 2013, Renaissance Technologies (RenTech) has maintained a long-term strategic position in CLH, representing a significant commitment to this investment thesis. Largest addition occurred in Q4 2015, adding 453,817 shares. Largest reduction occurred in Q1 2020, reducing 375,000 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s Clean Harbors (CLH) Holding Value Over Time
Track share changes against reported price movement
Quarterly Clean Harbors (CLH) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q2 2026 | +82,202 | New Buy | 82,202 | $298.75 |
| Q4 2025 | -11,302 | Sold Out | 0 | $0.00 |
| Q3 2025 | +11,302 | New Buy | 11,302 | $232.22 |
| Q2 2025 | -3,433 | Sold Out | 0 | $0.00 |
| Q1 2025 | -21,200 | Reduce 86.06% | 3,433 | $197.10 |
| Q4 2024 | -5,100 | Reduce 17.15% | 24,633 | $230.14 |
| Q3 2024 | -25,600 | Reduce 46.27% | 29,733 | $241.71 |
| Q2 2024 | -70,302 | Reduce 55.96% | 55,333 | $226.15 |
| Q1 2024 | -47,898 | Reduce 27.60% | 125,635 | $201.31 |
| Q4 2023 | -56,200 | Reduce 24.46% | 173,533 | $174.51 |
| Q3 2023 | -67,800 | Reduce 22.79% | 229,733 | $167.36 |
| Q2 2023 | -190,102 | Reduce 38.98% | 297,533 | $0.16 |
| Q1 2023 | -43,200 | Reduce 8.14% | 487,635 | $0.14 |
| Q4 2022 | +91,200 | Add 20.74% | 530,835 | $0.11 |
| Q3 2022 | +63,202 | Add 16.79% | 439,635 | $109.98 |
| Q2 2022 | +13,700 | Add 3.78% | 376,433 | $87.67 |
| Q1 2022 | -5,700 | Reduce 1.55% | 362,733 | $111.64 |
| Q4 2021 | -54,302 | Reduce 12.85% | 368,433 | $99.77 |
| Q3 2021 | -89,698 | Reduce 17.50% | 422,735 | $103.87 |
| Q2 2021 | -262,802 | Reduce 33.90% | 512,433 | $93.14 |
| Q1 2021 | -329,200 | Reduce 29.81% | 775,235 | $84.06 |
| Q4 2020 | -123,100 | Reduce 10.03% | 1.1 M | $76.10 |
| Q3 2020 | -40,100 | Reduce 3.16% | 1.23 M | $56.03 |
| Q2 2020 | -235,000 | Reduce 15.64% | 1.27 M | $59.98 |
| Q1 2020 | -375,000 | Reduce 19.97% | 1.5 M | $51.34 |
| Q4 2019 | +106,633 | Add 6.02% | 1.88 M | $85.75 |
| Q3 2019 | +121,100 | Add 7.34% | 1.77 M | $77.20 |
| Q2 2019 | +18,300 | Add 1.12% | 1.65 M | $71.10 |
| Q1 2019 | -18,100 | Reduce 1.10% | 1.63 M | $71.53 |
| Q4 2018 | +260,800 | Add 18.78% | 1.65 M | $49.35 |
| Q3 2018 | +67,800 | Add 5.13% | 1.39 M | $71.58 |
| Q2 2018 | +88,400 | Add 7.17% | 1.32 M | $55.55 |
| Q1 2018 | +35,600 | Add 2.97% | 1.23 M | $48.81 |
| Q4 2017 | +217,102 | Add 22.15% | 1.2 M | $54.20 |
| Q3 2017 | +3,698 | Add 0.38% | 980,000 | $56.70 |
| Q2 2017 | -114,700 | Reduce 10.51% | 976,302 | $55.83 |
| Q1 2017 | +175,602 | Add 19.18% | 1.09 M | $55.62 |
| Q4 2016 | +132,200 | Add 16.88% | 915,400 | $55.65 |
| Q3 2016 | +105,400 | Add 15.55% | 783,200 | $47.98 |
| Q2 2016 | +90,298 | Add 15.37% | 677,800 | $52.11 |
| Q1 2016 | +14,612 | Add 2.55% | 587,502 | $49.34 |
| Q4 2015 | +453,817 | Add 381.13% | 572,890 | $41.65 |
| Q3 2015 | +43,371 | Add 57.29% | 119,073 | $43.97 |
| Q2 2015 | -36,800 | Reduce 32.71% | 75,702 | $53.74 |
| Q1 2015 | -101,000 | Reduce 47.31% | 112,502 | $56.78 |
| Q4 2014 | +169,500 | Add 385.21% | 213,502 | $48.05 |
| Q3 2014 | +36,700 | Add 502.60% | 44,002 | $53.93 |
| Q2 2014 | +7,302 | New Buy | 7,302 | $64.23 |
| Q4 2013 | -154,402 | Sold Out | 0 | $0.00 |
| Q3 2013 | -7,400 | Reduce 4.57% | 154,402 | $58.66 |
| Q2 2013 | +161,802 | Add 0.00% | 161,802 | $50.53 |
Renaissance Technologies (RenTech)'s Clean Harbors Investment FAQs
Renaissance Technologies (RenTech) first purchased Clean Harbors, Inc. (CLH) in Q2 2013, acquiring 161,802 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Renaissance Technologies (RenTech) has held Clean Harbors, Inc. (CLH) for 51 quarters since Q2 2013.
Renaissance Technologies (RenTech)'s largest addition to Clean Harbors, Inc. (CLH) was in Q4 2015, adding 572,890 shares worth $23.86 M.
According to the latest 13F filing for Q2 2026, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC, owns 82,202 shares of Clean Harbors, Inc. (CLH), valued at approximately $24.56 M.
As of the Q2 2026 filing, Clean Harbors, Inc. (CLH) represents approximately 0.03% of Renaissance Technologies (RenTech)'s publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies (RenTech)'s peak holding in Clean Harbors, Inc. (CLH) was 1,877,635 shares, as reported at the end of Q4 2019.