Clean Harbors, Inc.
MX ˙ BMV ˙ US1844961078
SecurityMX:CLH1 / Clean Harbors, Inc.
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership140,485 shares
Latest Disclosed Value $ 40,281
Natixis Advisors, L.p. reports 3.01% decrease in ownership of CLH1 / Clean Harbors, Inc.

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 140,485 shares of Clean Harbors, Inc. (MX:CLH1) valued at $40,281 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 144,840 shares of Clean Harbors, Inc.. This represents a change in shares of -3.01% 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)
2026-05-13 2026-03-31 13F CLEAN HARBORS COM 184496107 140,485 -4,355 -3.01 40 21.21 0.0560
2026-02-10 2025-12-31 13F CLEAN HARBORS COM 184496107 144,840 -1,609 -1.10 34 -2.94 0.0481
2025-11-13 2025-09-30 13F CLEAN HARBORS COM 184496107 146,449 16,224 12.46 34 13.33 0.0496
2025-08-13 2025-06-30 13F CLEAN HARBORS COM 184496107 130,225 62,229 91.52 30 130.77 0.0478
2025-05-08 2025-03-31 13F CLEAN HARBORS COM 184496107 67,996 -10,263 -13.11 13 -27.78 0.0248
2025-02-10 2024-12-31 13F CLEAN HARBORS COM 184496107 78,259 -8,734 -10.04 18 -14.29 0.0337
2024-11-06 2024-09-30 13F CLEAN HARBORS COM 184496107 86,993 2,116 2.49 21 10.53 0.0410
2024-08-01 2024-06-30 13F CLEAN HARBORS COM 184496107 84,877 -89,506 -51.33 19 -45.71 0.0417
2024-04-25 2024-03-31 13F CLEAN HARBORS COM 184496107 174,383 8,207 4.94 35 25.00 0.0807
2024-02-06 2023-12-31 13F CLEAN HARBORS COM 184496107 166,176 8,531 5.41 29 7.69 0.0763
2023-11-13 2023-09-30 13F CLEAN HARBORS COM 184496107 157,645 9,219 6.21 26 8.33 0.0807
2023-08-15 2023-06-30 13F CLEAN HARBORS COM 184496107 148,426 80,649 118.99 24 166.67 0.0754
2023-05-11 2023-03-31 13F CLEAN HARBORS COM 184496107 67,777 8,352 14.05 10 50.00 0.0333
2023-01-27 2022-12-31 13F CLEAN HARBORS COM 184496107 59,425 -566 -0.94 7 -99.91 0.0256
2022-11-14 2022-09-30 13F CLEAN HARBORS COM 184496107 59,991 -5,230 -8.02 6,598 15.39 0.0279
2022-08-12 2022-06-30 13F CLEAN HARBORS COM 184496107 65,221 -4,641 -6.64 5,718 -26.68 0.0251
2022-05-12 2022-03-31 13F CLEAN HARBORS COM 184496107 69,862 9,284 15.33 7,799 29.04 0.0297
2022-02-08 2021-12-31 13F CLEAN HARBORS COM 184496107 60,578 5,490 9.97 6,044 5.63 0.0231
2021-11-15 2021-09-30 13F CLEAN HARBORS COM 184496107 55,088 175 0.32 5,722 11.87 0.0235
2021-08-12 2021-06-30 13F CLEAN HARBORS COM 184496107 54,913 485 0.89 5,115 11.80 0.0239
2021-05-05 2021-03-31 13F CLEAN HARBORS COM 184496107 54,428 -2,344 -4.13 4,575 5.90 0.0239
2021-02-12 2020-12-31 13F CLEAN HARBORS COM 184496107 56,772 8,312 17.15 4,320 59.12 0.0249
2020-11-12 2020-09-30 13F CLEAN HARBORS COM 184496107 48,460 1,614 3.45 2,715 -3.38 0.0171
2020-08-11 2020-06-30 13F CLEAN HARBORS COM 184496107 46,846 7,014 17.61 2,810 37.41 0.0186
2020-04-27 2020-03-31 13F CLEAN HARBORS COM 184496107 39,832 -8,834 -18.15 2,045 -50.99 0.0167
2020-02-10 2019-12-31 13F CLEAN HARBORS COM 184496107 48,666 10,701 28.19 4,173 42.37 0.0294
2019-11-12 2019-09-30 13F CLEAN HARBORS COM 184496107 37,965 -2,086 -5.21 2,931 2.91 0.0233
2019-08-12 2019-06-30 13F CLEAN HARBORS COM 184496107 40,051 39 0.10 2,848 -0.49 0.0233
2019-05-15 2019-03-31 13F/A-1 CLEAN HARBORS COM 184496107 40,012 -976 -2.38 2,862 41.54 0.0251
2019-05-15 2019-03-31 13F CLEAN HARBORS COM 184496107 40,012 -976 2,862
2019-02-13 2018-12-31 13F/A-1 CLEAN HARBORS COM 184496107 40,988 -1,803 -4.21 2,022 -33.99 0.0200
2019-02-13 2018-12-31 13F CLEAN HARBORS COM 184496107 40,988 -1,803 2,022
2018-11-13 2018-09-30 13F CLEAN HARBORS COM 184496107 42,791 -9,003 -17.38 3,063 6.47 0.0270
2018-08-14 2018-06-30 13F/A-1 CLEAN HARBORS COM 184496107 51,794 4,590 9.72 2,877 24.87 0.0275
2018-08-14 2018-06-30 13F CLEAN HARBORS COM 184496107 51,794 2,877
2018-05-10 2018-03-31 13F CLEAN HARBORS COM 184496107 47,204 -161 -0.34 2,304 -10.25 0.0227
2018-02-14 2017-12-31 13F CLEAN HARBORS COM 184496107 47,365 -17,750 -27.26 2,567 -30.47 0.0261
2017-11-14 2017-09-30 13F CLEAN HARBORS COM 184496107 65,115 -149,427 -69.65 3,692 -69.18 0.0390
2017-07-27 2017-06-30 13F CLEAN HARBORS COM 184496107 214,542 -6,689 -3.02 11,978 -2.66 0.1296
2017-05-12 2017-03-31 13F CLEAN HARBORS COM 184496107 221,231 -48,779 -18.07 12,305 -18.11 0.1363
2017-02-07 2016-12-31 13F CLEAN HARBORS COM 184496107 270,010 26,736 10.99 15,026 28.74 0.1807
2016-11-04 2016-09-30 13F CLEAN HARBORS COM 184496107 243,274 -1,605 -0.66 11,672 -8.53 0.1512
2016-08-01 2016-06-30 13F CLEAN HARBORS COM 184496107 244,879 68,978 39.21 12,761 47.03 0.1764
2016-05-06 2016-03-31 13F CLEAN HARBORS COM 184496107 175,901 103,788 143.92 8,679 188.91 0.1299
2016-02-12 2015-12-31 13F CLEAN HARBORS COM 184496107 72,113 -10,879 -13.11 3,004 -17.68 0.0492
2015-11-12 2015-09-30 13F CLEAN HARBORS COM 184496107 82,992 -4 -0.00 3,649 -18.18 0.0633
2015-08-14 2015-06-30 13F CLEAN HARBORS COM 184496107 82,996 467 0.57 4,460 -4.82 0.0757
2015-05-15 2015-03-31 13F CLEAN HARBORS COM 184496107 82,529 7,353 9.78 4,686 29.73 0.0823
2015-02-05 2014-12-31 13F CLEAN HARBORS COM 184496107 75,176 22,304 42.18 3,612 26.69 0.0676
2014-11-03 2014-09-30 13F CLEAN HARBORS COM 184496107 52,872 6,182 13.24 2,851 -4.97 0.0572
2014-08-13 2014-06-30 13F CLEAN HARBORS COM 184496107 46,690 -8,266 -15.04 3,000 -0.37 0.0430
2014-05-13 2014-03-31 13F CLEAN HARBORS COM 184496107 54,956 33,430 155.30 3,011 133.23 0.0463
2014-02-12 2013-12-31 13F CLEAN HARBORS COM 184496107 21,526 6,024 38.86 1,291 42.02 0.0211
2013-10-30 2013-09-30 13F CLEAN HARBORS COM 184496107 15,502 10,700 222.82 909 274.07 0.0167
2013-07-19 2013-06-30 13F CLEAN HARBORS COM 184496107 4,802 4,802 243 0.0048
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.