Clean Harbors, Inc.
MX ˙ BMV ˙ US1844961078
SecurityMX:CLH1 / Clean Harbors, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership448,670 shares
Latest Disclosed Value $ 128,647,149
Northern Trust Corp reports 1.78% decrease in ownership of CLH1 / Clean Harbors, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 448,670 shares of Clean Harbors, Inc. (MX:CLH1) valued at $128,647,149 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 456,800 shares of Clean Harbors, Inc.. This represents a change in shares of -1.78% 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)
2026-05-14 2026-03-31 13F CLEAN HARBORS COM 184496107 448,670 -8,130 -1.78 128,647 20.11 0.0035
2026-02-17 2025-12-31 13F CLEAN HARBORS COM 184496107 456,800 -18,211 -3.83 107,110 -2.90 0.0137
2025-11-14 2025-09-30 13F CLEAN HARBORS COM 184496107 475,011 4,584 0.97 110,307 1.43 0.0141
2025-08-13 2025-06-30 13F CLEAN HARBORS COM 184496107 470,427 -19,311 -3.94 108,753 12.67 0.0150
2025-05-13 2025-03-31 13F CLEAN HARBORS COM 184496107 489,738 -8,479 -1.70 96,527 -15.81 0.0143
2025-02-14 2024-12-31 13F CLEAN HARBORS COM 184496107 498,217 109,209 28.07 114,660 21.94 0.0162
2024-11-13 2024-09-30 13F CLEAN HARBORS COM 184496107 389,008 -3,183 -0.81 94,027 6.01 0.0154
2024-08-14 2024-06-30 13F CLEAN HARBORS COM 184496107 392,191 38,558 10.90 88,694 24.59 0.0149
2024-05-14 2024-03-31 13F CLEAN HARBORS COM 184496107 353,633 -41,605 -10.53 71,190 3.21 0.0123
2024-02-13 2023-12-31 13F CLEAN HARBORS COM 184496107 395,238 4,100 1.05 68,973 5.37 0.0125
2023-11-13 2023-09-30 13F CLEAN HARBORS COM 184496107 391,138 -8,460 -2.12 65,461 -0.37 0.0127
2023-08-11 2023-06-30 13F CLEAN HARBORS COM 184496107 399,598 -12,494 -3.03 65,706 11.84 0.0126
2023-05-15 2023-03-31 13F CLEAN HARBORS COM 184496107 412,092 -53 -0.01 58,748 24.91 0.0116
2023-02-13 2022-12-31 13F CLEAN HARBORS COM 184496107 412,145 -3,203 -0.77 47,034 2.96 0.0099
2022-11-14 2022-09-30 13F CLEAN HARBORS COM 184496107 415,348 2,621 0.64 45,679 26.24 0.0104
2022-08-12 2022-06-30 13F CLEAN HARBORS COM 184496107 412,727 -8,305 -1.97 36,184 -23.02 0.0078
2022-05-13 2022-03-31 13F CLEAN HARBORS COM 184496107 421,032 -4,597 -1.08 47,005 10.69 0.0083
2022-02-08 2021-12-31 13F CLEAN HARBORS COM 184496107 425,629 2,282 0.54 42,465 -3.43 0.0070
2021-11-15 2021-09-30 13F CLEAN HARBORS COM 184496107 423,347 -31,447 -6.91 43,973 3.81 0.0078
2021-08-13 2021-06-30 13F CLEAN HARBORS COM 184496107 454,794 -16,464 -3.49 42,361 6.94 0.0075
2021-05-12 2021-03-31 13F CLEAN HARBORS COM 184496107 471,258 31,010 7.04 39,613 18.24 0.0074
2021-02-11 2020-12-31 13F CLEAN HARBORS COM 184496107 440,248 -923 -0.21 33,502 35.54 0.0065
2020-11-16 2020-09-30 13F CLEAN HARBORS COM 184496107 441,171 -12,793 -2.82 24,718 -9.22 0.0054
2020-08-14 2020-06-30 13F CLEAN HARBORS COM 184496107 453,964 -45,561 -9.12 27,228 6.17 0.0065
2020-05-14 2020-03-31 13F CLEAN HARBORS COM 184496107 499,525 7,827 1.59 25,646 -39.17 0.0074
2020-02-14 2019-12-31 13F CLEAN HARBORS COM 184496107 491,698 8,411 1.74 42,163 13.00 0.0094
2019-11-13 2019-09-30 13F CLEAN HARBORS COM 184496107 483,287 -7,013 -1.43 37,311 7.03 0.0089
2019-08-13 2019-06-30 13F CLEAN HARBORS COM 184496107 490,300 520 0.11 34,861 -0.49 0.0083
2019-05-13 2019-03-31 13F CLEAN HARBORS COM 184496107 489,780 24,780 5.33 35,034 52.67 0.0087
2019-02-12 2018-12-31 13F CLEAN HARBORS COM 184496107 465,000 9,923 2.18 22,948 -29.55 0.0064
2018-11-14 2018-09-30 13F CLEAN HARBORS COM 184496107 455,077 271 0.06 32,574 28.93 0.0080
2018-09-18 2018-06-30 13F/A-1 CLEAN HARBORS COM 184496107 454,806 44,173 10.76 25,265 26.05 0.0064
2018-08-14 2018-06-30 13F CLEAN HARBORS COM 184496107 458,625 47,992 25,477
2018-05-09 2018-03-31 13F CLEAN HARBORS COM 184496107 410,633 976 0.24 20,044 -9.72 0.0052
2018-02-14 2017-12-31 13F CLEAN HARBORS COM 184496107 409,657 -25,750 -5.91 22,203 -10.07 0.0056
2017-11-13 2017-09-30 13F CLEAN HARBORS COM 184496107 435,407 -21,670 -4.74 24,688 -3.26 0.0064
2017-08-11 2017-06-30 13F CLEAN HARBORS COM 184496107 457,077 514 0.11 25,519 0.49 0.0071
2017-05-12 2017-03-31 13F CLEAN HARBORS COM 184496107 456,563 9,311 2.08 25,394 2.02 0.0073
2017-02-13 2016-12-31 13F CLEAN HARBORS COM 184496107 447,252 -30,709 -6.43 24,890 8.53 0.0076
2016-11-09 2016-09-30 13F CLEAN HARBORS COM 184496107 477,961 2,549 0.54 22,933 -7.43 0.0071
2016-08-12 2016-06-30 13F CLEAN HARBORS COM 184496107 475,412 11,563 2.49 24,774 9.77 0.0080
2016-08-19 2016-03-31 13F/A-1 CLEAN HARBORS COM 184496107 463,849 4,779 1.04 22,570 18.04 0.0075
2016-05-13 2016-03-31 13F Clean Harbors COMM 184496107 463,846 22,886
2016-02-12 2015-12-31 13F Clean Harbors COMM 184496107 459,070 -38,818 -7.80 19,121 -12.65 0.0063
2015-11-12 2015-09-30 13F Clean Harbors COMM 184496107 497,888 71,578 16.79 21,891 -4.45 0.0073
2015-08-13 2015-06-30 13F CLEAN HARBORS COM 184496107 426,310 -46,247 -9.79 22,910 -14.62 0.0155
2015-08-13 2015-06-30 13F Clean Harbors COMM 018449610 65,484 -407,073 3,519 0.0024
2015-05-14 2015-03-31 13F Clean Harbors COMM 184496107 472,557 -114,626 -19.52 26,832 -4.90 0.0081
2015-02-12 2014-12-31 13F Clean Harbors COM 184496107 587,183 97,510 19.91 28,214 6.86 0.0085
2014-11-13 2014-09-30 13F Clean Harbors COMM 184496107 489,673 25,029 5.39 26,403 -11.56 0.0083
2014-08-14 2014-06-30 13F CLEAN HARBORS com 184496107 464,644 -33,684 -6.76 29,853 9.34 0.0093
2014-05-14 2014-03-31 13F CLEAN HARBORS COMM 184496107 498,328 54,523 12.29 27,304 2.60 0.0086
2014-02-21 2013-12-31 13F/A-1 CLEAN HARBORS COM 184496107 443,805 -25,620 -5.46 26,611 -3.36 0.0085
2014-02-12 2013-12-31 13F CLEAN HARBORS COM 184496107 443,805 26,611
2013-11-13 2013-09-30 13F CLEAN HARBORS COM 184496107 469,425 7,452 1.61 27,536 17.96 0.0097
2013-08-09 2013-06-30 13F CLEAN HARBORS COM 184496107 461,973 461,973 23,343 0.0085
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.