Clean Harbors, Inc.
MX ˙ BMV ˙ US1844961078
SecurityMX:CLH1 / Clean Harbors, Inc.
InstitutionAdvisors Asset Management, Inc.
Latest Disclosed Ownership11,980 shares
Latest Disclosed Value $ 3,435,025
Advisors Asset Management, Inc. reports 22.88% increase in ownership of CLH1 / Clean Harbors, Inc.

On May 15, 2026 - Advisors Asset Management, Inc. filed a 13F-HR form disclosing ownership of 11,980 shares of Clean Harbors, Inc. (MX:CLH1) valued at $3,435,025 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 9,749 shares of Clean Harbors, Inc.. This represents a change in shares of 22.88% 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 11,980 2,231 22.88 3,435 50.33 0.0570
2026-02-12 2025-12-31 13F CLEAN HARBORS COM 184496107 9,749 -3,056 -23.87 2,286 -23.14 0.0384
2025-11-06 2025-09-30 13F CLEAN HARBORS COM 184496107 12,805 -5,237 -29.03 2,974 -28.71 0.0505
2025-08-12 2025-06-30 13F CLEAN HARBORS COM 184496107 18,042 -984 -5.17 4,171 11.20 0.0747
2025-05-15 2025-03-31 13F CLEAN HARBORS COM 184496107 19,026 449 2.42 3,750 -12.28 0.0705
2025-02-10 2024-12-31 13F CLEAN HARBORS COM 184496107 18,577 -154 -0.82 4,275 -5.57 0.0788
2024-11-08 2024-09-30 13F CLEAN HARBORS COM 184496107 18,731 -2,834 -13.14 4,527 -7.16 0.0832
2024-08-14 2024-06-30 13F CLEAN HARBORS COM 184496107 21,565 19 0.09 4,877 12.43 0.0951
2024-05-14 2024-03-31 13F CLEAN HARBORS COM 184496107 21,546 1,634 8.21 4,337 24.84 0.0834
2024-02-14 2023-12-31 13F CLEAN HARBORS COM 184496107 19,912 -6,848 -25.59 3,475 -22.42 0.0709
2023-11-14 2023-09-30 13F CLEAN HARBORS COM 184496107 26,760 1,145 4.47 4,479 6.34 0.0966
2023-08-14 2023-06-30 13F CLEAN HARBORS COM 184496107 25,615 -199 -0.77 4,212 14.43 0.0860
2023-05-12 2023-03-31 13F CLEAN HARBORS COM 184496107 25,814 5,847 29.28 3,680 61.55 0.0749
2023-02-13 2022-12-31 13F CLEAN HARBORS COM 184496107 19,967 5,023 33.61 2,279 38.56 0.0469
2022-11-08 2022-09-30 13F CLEAN HARBORS COM 184496107 14,944 6,871 85.11 1,644 132.20 0.0346
2022-08-08 2022-06-30 13F CLEAN HARBORS COM 184496107 8,073 2,150 36.30 708 7.11 0.0134
2022-05-17 2022-03-31 13F CLEAN HARBORS COM 184496107 5,923 5,923 661 0.0102
2017-05-02 2017-03-31 13F CLEAN HARBORS COM 184496107 0 -1,300 -100.00 0 -100.00
2016-10-31 2016-09-30 13F CLEAN HARBORS COM 184496107 1,300 -100 -7.14 62 -15.07 0.0010
2016-08-08 2016-06-30 13F CLEAN HARBORS COM 184496107 1,400 -1,619 -53.63 73 -51.01 0.0012
2016-05-16 2016-03-31 13F CLEAN HARBORS COM 184496107 3,019 -294 -8.87 149 7.97 0.0025
2016-02-10 2015-12-31 13F CLEAN HARBORS COM 184496107 3,313 -245 -6.89 138 -11.54 0.0022
2015-11-16 2015-09-30 13F CLEAN HARBORS COM 184496107 3,558 -498 -12.28 156 -28.44 0.0025
2015-08-11 2015-06-30 13F CLEAN HARBORS COM 184496107 4,056 -620 -13.26 218 -18.05 0.0030
2015-05-13 2015-03-31 13F CLEAN HARBORS COM 184496107 4,676 -229 -4.67 266 12.71 0.0035
2015-02-05 2014-12-31 13F CLEAN HARBORS COM 184496107 4,905 270 5.83 236 -5.60 0.0032
2014-11-13 2014-09-30 13F CLEAN HARBORS COM 184496107 4,635 889 23.73 250 4.17 0.0034
2014-08-14 2014-06-30 13F CLEAN HARBORS COM 184496107 3,746 1,946 108.11 240 142.42 0.0033
2014-05-15 2014-03-31 13F CLEAN HARBORS COM 184496107 1,800 0 0.00 99 -8.33 0.0015
2014-02-03 2013-12-31 13F CLEAN HARBORS COM 184496107 1,800 -307 -14.57 108 -12.90 0.0017
2013-11-15 2013-09-30 13F CLEAN HARBORS COM 184496107 2,107 -200 -8.67 124 5.98 0.0022
2013-08-14 2013-06-30 13F CLEAN HARBORS COM 184496107 2,307 2,307 117 0.0022
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.