Clean Harbors, Inc.
MX ˙ BMV ˙ US1844961078
SecurityMX:CLH1 / Clean Harbors, Inc.
InstitutionCI Private Wealth, LLC
Latest Disclosed Ownership39,954 shares
Latest Disclosed Value $ 11,335,987
CI Private Wealth, LLC reports 215.04% increase in ownership of CLH1 / Clean Harbors, Inc.

On May 15, 2026 - CI Private Wealth, LLC filed a 13F-HR form disclosing ownership of 39,954 shares of Clean Harbors, Inc. (MX:CLH1) valued at $11,335,987 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on March 9, 2026 disclosing 12,682 shares of Clean Harbors, Inc.. This represents a change in shares of 215.04% 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 39,954 27,272 215.04 11,336 281.14 0.0162
2026-03-09 2025-12-31 13F/A-1 CLEAN HARBORS COM 184496107 12,682 7,667 152.88 2,975 155.50 0.0040
2026-02-19 2025-12-31 13F CLEAN HARBORS COM 184496107 194,718 189,703 3,504 0.0013
2025-11-14 2025-09-30 13F CLEAN HARBORS COM 184496107 5,015 2,515 100.60 1,165 105.29 0.0018
2025-09-26 2025-06-30 13F/A-1 CLEAN HARBORS COM 184496107 2,500 134 5.66 567 21.67 0.0008
2025-08-15 2025-06-30 13F CLEAN HARBORS COM 184496107 2,453 87 567 0.0005
2025-05-14 2025-03-31 13F CLEAN HARBORS COM 184496107 2,366 -2,397 -50.33 466 -57.48 0.0008
2025-02-10 2024-12-31 13F CLEAN HARBORS COM 184496107 4,763 -46,629 -90.73 1,096 -91.18 0.0018
2024-11-12 2024-09-30 13F CLEAN HARBORS COM 184496107 51,392 -582 -1.12 12,422 8.20 0.0194
2024-08-13 2024-06-30 13F CLEAN HARBORS COM 184496107 51,974 32 0.06 11,481 9.79 0.0200
2024-05-09 2024-03-31 13F CLEAN HARBORS COM 184496107 51,942 541 1.05 10,456 16.58 0.0186
2024-02-09 2023-12-31 13F CLEAN HARBORS COM 184496107 51,401 45,710 803.20 8,970 842.12 0.0165
2023-11-03 2023-09-30 13F CLEAN HARBORS COM 184496107 5,691 16 0.28 952 2.04 0.0022
2023-08-10 2023-06-30 13F CLEAN HARBORS COM 184496107 5,675 14 0.25 933 15.61 0.0022
2023-05-15 2023-03-31 13F CLEAN HARBORS COM 184496107 5,661 2,111 59.46 807 99.26 0.0022
2023-02-15 2022-12-31 13F CLEAN HARBORS COM 184496107 3,550 3,550 405 0.0015
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.