Clean Harbors, Inc.
MX ˙ BMV ˙ US1844961078
SecurityMX:CLH1 / Clean Harbors, Inc.
InstitutionFirst Trust Advisors Lp
Latest Disclosed Ownership778,441 shares
Latest Disclosed Value $ 223,202,387
First Trust Advisors Lp reports 9.95% increase in ownership of CLH1 / Clean Harbors, Inc.

On May 13, 2026 - First Trust Advisors Lp filed a 13F-HR form disclosing ownership of 778,441 shares of Clean Harbors, Inc. (MX:CLH1) valued at $223,202,387 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 707,994 shares of Clean Harbors, Inc.. This represents a change in shares of 9.95% 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 778,441 70,447 9.95 223,202 34.45 0.1591
2026-02-13 2025-12-31 13F CLEAN HARBORS COM 184496107 707,994 56,309 8.64 166,010 9.70
2025-11-12 2025-09-30 13F CLEAN HARBORS COM 184496107 651,685 101,509 18.45 151,334 18.98 0.1125
2025-08-13 2025-06-30 13F CLEAN HARBORS COM 184496107 550,176 14,865 2.78 127,190 20.55 0.1023
2025-05-14 2025-03-31 13F CLEAN HARBORS COM 184496107 535,311 165,370 44.70 105,510 23.93 0.0934
2025-02-13 2024-12-31 13F CLEAN HARBORS COM 184496107 369,941 117,718 46.67 85,138 39.65 0.0750
2024-11-13 2024-09-30 13F CLEAN HARBORS COM 184496107 252,223 -11,360 -4.31 60,965 2.27 0.0581
2024-08-13 2024-06-30 13F CLEAN HARBORS COM 184496107 263,583 89,552 51.46 59,609 70.15 0.0608
2024-05-13 2024-03-31 13F CLEAN HARBORS COM 184496107 174,031 10,456 6.39 35,034 22.73 0.0356
2024-02-13 2023-12-31 13F CLEAN HARBORS COM 184496107 163,575 -4,169 -2.49 28,545 1.68 0.0311
2023-11-13 2023-09-30 13F CLEAN HARBORS COM 184496107 167,744 618 0.37 28,074 2.16 0.0333
2023-08-14 2023-06-30 13F CLEAN HARBORS COM 184496107 167,126 -60,658 -26.63 27,481 -15.37 0.0312
2023-05-15 2023-03-31 13F CLEAN HARBORS COM 184496107 227,784 69,568 43.97 32,473 79.85 0.0375
2023-02-09 2022-12-31 13F CLEAN HARBORS COM 184496107 158,216 -61,316 -27.93 18,056 -25.22 0.0215
2022-11-14 2022-09-30 13F CLEAN HARBORS COM 184496107 219,532 93,381 74.02 24,144 118.30 0.0313
2022-08-12 2022-06-30 13F CLEAN HARBORS COM 184496107 126,151 -37,027 -22.69 11,060 -39.29 0.0137
2022-05-13 2022-03-31 13F CLEAN HARBORS COM 184496107 163,178 63,141 63.12 18,217 82.52 0.0186
2022-02-08 2021-12-31 13F CLEAN HARBORS COM 184496107 100,037 -16,725 -14.32 9,981 -17.70 0.0097
2021-11-15 2021-09-30 13F CLEAN HARBORS COM 184496107 116,762 -49,136 -29.62 12,128 -21.51 0.0130
2021-10-12 2021-06-30 13F/A-1 CLEAN HARBORS COM 184496107 165,898 25,872 18.48 15,452 31.27 0.0167
2021-08-16 2021-06-30 13F CLEAN HARBORS COM 184496107 165,898 25,872 15,452 0.0159
2021-05-14 2021-03-31 13F CLEAN HARBORS COM 184496107 140,026 3,211 2.35 11,771 13.05 0.0143
2021-02-02 2020-12-31 13F CLEAN HARBORS COM 184496107 136,815 6,076 4.65 10,412 42.14 0.0138
2020-11-05 2020-09-30 13F CLEAN HARBORS COM 184496107 130,739 -19,589 -13.03 7,325 -18.76 0.0117
2020-07-22 2020-06-30 13F CLEAN HARBORS COM 184496107 150,328 68,248 83.15 9,017 113.98 0.0156
2020-05-06 2020-03-31 13F CLEAN HARBORS COM 184496107 82,080 -2,415 -2.86 4,214 -41.84 0.0095
2020-02-03 2019-12-31 13F CLEAN HARBORS COM 184496107 84,495 -16,289 -16.16 7,245 -6.89 0.0124
2019-11-04 2019-09-30 13F CLEAN HARBORS COM 184496107 100,784 -2,707 -2.62 7,781 5.75 0.0146
2019-07-30 2019-06-30 13F CLEAN HARBORS COM 184496107 103,491 -51,285 -33.13 7,358 -33.54 0.0139
2019-06-19 2019-03-31 13F/A-1 CLEAN HARBORS COM 184496107 154,776 -23,197 -13.03 11,071 26.05 0.0220
2019-05-09 2019-03-31 13F CLEAN HARBORS COM 184496107 154,776 -23,197 11,071
2019-02-07 2018-12-31 13F CLEAN HARBORS COM 184496107 177,973 -180,892 -50.41 8,783 -65.81 0.0208
2018-10-25 2018-09-30 13F CLEAN HARBORS COM 184496107 358,865 -23,442 -6.13 25,688 20.96 0.0478
2018-08-02 2018-06-30 13F CLEAN HARBORS COM 184496107 382,307 222,672 139.49 21,237 172.55 0.0440
2018-04-23 2018-03-31 13F CLEAN HARBORS COM 184496107 159,635 47,302 42.11 7,792 27.99 0.0179
2018-02-08 2017-12-31 13F CLEAN HARBORS COM 184496107 112,333 15,686 16.23 6,088 11.09 0.0145
2017-10-24 2017-09-30 13F CLEAN HARBORS COM 184496107 96,647 -16,002 -14.21 5,480 -12.86 0.0141
2017-08-02 2017-06-30 13F CLEAN HARBORS COM 184496107 112,649 -265,150 -70.18 6,289 -70.07 0.0168
2017-05-02 2017-03-31 13F CLEAN HARBORS COM 184496107 377,799 186,428 97.42 21,013 97.31 0.0582
2017-02-06 2016-12-31 13F CLEAN HARBORS COM 184496107 191,371 138,702 263.35 10,650 321.45 0.0317
2016-11-01 2016-09-30 13F CLEAN HARBORS COM 184496107 52,669 -18,941 -26.45 2,527 -32.29 0.0075
2016-08-04 2016-06-30 13F CLEAN HARBORS COM 184496107 71,610 7,631 11.93 3,732 18.21 0.0118
2016-05-10 2016-03-31 13F CLEAN HARBORS COM 184496107 63,979 63,979 0.00 3,157 0.0101
2015-11-05 2015-09-30 13F CLEAN HARBORS COM 184496107 0 -24,269 -100.00 0 -100.00
2015-08-04 2015-06-30 13F CLEAN HARBORS COM 184496107 24,269 24,269 0.00 1,304 0.0034
2015-05-04 2015-03-31 13F CLEAN HARBORS COM 184496107 0 -112,555 -100.00 0 -100.00
2015-02-13 2014-12-31 13F CLEAN HARBORS COM 184496107 112,555 -235,460 -67.66 5,408 -71.18 0.0182
2014-11-12 2014-09-30 13F CLEAN HARBORS COM 184496107 348,015 302,901 671.41 18,765 547.29 0.0738
2014-08-11 2014-06-30 13F CLEAN HARBORS COM 184496107 45,114 -28,479 -38.70 2,899 -28.10 0.0120
2014-05-12 2014-03-31 13F CLEAN HARBORS COM 184496107 73,593 -75,844 -50.75 4,032 -55.00 0.0177
2014-08-08 2013-12-31 13F/A-1 CLEAN HARBORS COM 184496107 149,437 149,437 8,960 0.0434
2014-02-13 2013-12-31 13F CLEAN HARBORS COM 184496107 149,437 8,960 0.0402
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.