Clean Harbors, Inc.
MX ˙ BMV ˙ US1844961078
SecurityMX:CLH1 / Clean Harbors, Inc.
InstitutionGotham Asset Management, LLC
ManagerJoel Greenblatt
Latest Disclosed Ownership134,631 shares
Latest Disclosed Value $ 38,602,747
Gotham Asset Management, LLC reports 19.89% increase in ownership of CLH1 / Clean Harbors, Inc.

On May 15, 2026 - Gotham Asset Management, LLC filed a 13F-HR form disclosing ownership of 134,631 shares of Clean Harbors, Inc. (MX:CLH1) valued at $38,602,747 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 112,294 shares of Clean Harbors, Inc.. This represents a change in shares of 19.89% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F CLEAN HARBORS COM 184496107 134,631 22,337 19.89 38,603 46.61 0.1182
2026-02-17 2025-12-31 13F CLEAN HARBORS COM 184496107 112,294 75,353 203.98 26,331 206.95 0.0961
2025-11-14 2025-09-30 13F CLEAN HARBORS COM 184496107 36,941 -1,680 -4.35 8,578 -3.92 0.0373
2025-08-14 2025-06-30 13F CLEAN HARBORS COM 184496107 38,621 2,437 6.74 8,928 25.20 0.0534
2025-05-15 2025-03-31 13F CLEAN HARBORS COM 184496107 36,184 6,255 20.90 7,132 3.54 0.0595
2025-02-14 2024-12-31 13F CLEAN HARBORS COM 184496107 29,929 6,226 26.27 6,888 20.21 0.0653
2024-11-14 2024-09-30 13F CLEAN HARBORS COM 184496107 23,703 121 0.51 5,729 7.43 0.0593
2024-08-14 2024-06-30 13F CLEAN HARBORS COM 184496107 23,582 403 1.74 5,333 14.29 0.0690
2024-05-15 2024-03-31 13F CLEAN HARBORS COM 184496107 23,179 3,100 15.44 4,666 33.20 0.0705
2024-02-14 2023-12-31 13F CLEAN HARBORS COM 184496107 20,079 3,096 18.23 3,504 23.26 0.0650
2023-11-14 2023-09-30 13F CLEAN HARBORS COM 184496107 16,983 -2,149 -11.23 2,842 -9.63 0.0587
2023-08-14 2023-06-30 13F CLEAN HARBORS COM 184496107 19,132 -14,447 -43.02 3,146 -34.30 0.0684
2023-05-15 2023-03-31 13F CLEAN HARBORS COM 184496107 33,579 24,983 290.64 4,787 388.47 0.1160
2023-02-14 2022-12-31 13F CLEAN HARBORS COM 184496107 8,596 902 11.72 981 15.84 0.0276
2022-11-14 2022-09-30 13F CLEAN HARBORS COM 184496107 7,694 2,352 44.03 846 80.77 0.0253
2022-08-15 2022-06-30 13F CLEAN HARBORS COM 184496107 5,342 273 5.39 468 -17.31 0.0150
2022-05-16 2022-03-31 13F CLEAN HARBORS COM 184496107 5,069 -12,322 -70.85 566 -67.38 0.0175
2022-02-14 2021-12-31 13F CLEAN HARBORS COM 184496107 17,391 885 5.36 1,735 1.23 0.0560
2021-11-15 2021-09-30 13F CLEAN HARBORS COM 184496107 16,506 9,313 129.47 1,714 155.82 0.0695
2021-08-16 2021-06-30 13F CLEAN HARBORS COM 184496107 7,193 831 13.06 670 25.23 0.0284
2021-05-17 2021-03-31 13F CLEAN HARBORS COM 184496107 6,362 -4,641 -42.18 535 -36.08 0.0239
2021-02-16 2020-12-31 13F CLEAN HARBORS COM 184496107 11,003 -7,154 -39.40 837 -17.70 0.0277
2020-11-16 2020-09-30 13F CLEAN HARBORS COM 184496107 18,157 -10,642 -36.95 1,017 -41.11 0.0327
2020-08-13 2020-06-30 13F CLEAN HARBORS COM 184496107 28,799 -16,768 -36.80 1,727 -26.17 0.0517
2020-05-15 2020-03-31 13F CLEAN HARBORS COM 184496107 45,567 -2,813 -5.81 2,339 -43.62 0.0650
2020-02-14 2019-12-31 13F CLEAN HARBORS COM 184496107 48,380 9,908 25.75 4,149 39.70 0.0762
2019-11-14 2019-09-30 13F CLEAN HARBORS COM 184496107 38,472 3,177 9.00 2,970 18.37 0.0525
2019-08-14 2019-06-30 13F CLEAN HARBORS COM 184496107 35,295 -68,418 -65.97 2,509 -66.18 0.0400
2019-05-15 2019-03-31 13F CLEAN HARBORS COM 184496107 103,713 68,669 195.95 7,419 329.09 0.1087
2019-02-14 2018-12-31 13F CLEAN HARBORS COM 184496107 35,044 35,044 1,729 0.0269
2018-08-14 2018-06-30 13F CLEAN HARBORS COM 184496107 0 -16,051 -100.00 0 -100.00
2018-05-15 2018-03-31 13F CLEAN HARBORS COM 184496107 16,051 2,655 19.82 783 7.85 0.0110
2018-02-14 2017-12-31 13F CLEAN HARBORS COM 184496107 13,396 4,026 42.97 726 36.72 0.0105
2017-11-14 2017-09-30 13F CLEAN HARBORS COM 184496107 9,370 9,370 531 0.0078
2017-02-14 2016-12-31 13F CLEAN HARBORS COM 184496107 0 -6,312 -100.00 0 -100.00
2016-11-14 2016-09-30 13F CLEAN HARBORS COM 184496107 6,312 -226 -3.46 303 -11.14 0.0039
2016-08-15 2016-06-30 13F CLEAN HARBORS COM 184496107 6,538 -188,587 -96.65 341 -96.46 0.0041
2016-05-16 2016-03-31 13F CLEAN HARBORS COM 184496107 195,125 -100,906 -34.09 9,627 -21.92 0.1079
2016-02-16 2015-12-31 13F CLEAN HARBORS COM 184496107 296,031 296,031 0.00 12,330 0.1339
2014-08-14 2014-06-30 13F CLEAN HARBORS COM 184496107 0 -94,325 -100.00 0 -100.00
2014-05-15 2014-03-31 13F CLEAN HARBORS COM 184496107 94,325 94,325 5,168 0.0778
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.