Clean Harbors, Inc.
MX ˙ BMV ˙ US1844961078
SecurityMX:CLH1 / Clean Harbors, Inc.
InstitutionMan Group plc
Latest Disclosed Ownership21,395 shares
Latest Disclosed Value $ 6,134,588
Man Group plc reports 2,085.39% increase in ownership of CLH1 / Clean Harbors, Inc.

On May 15, 2026 - Man Group plc filed a 13F-HR form disclosing ownership of 21,395 shares of Clean Harbors, Inc. (MX:CLH1) valued at $6,134,588 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 979 shares of Clean Harbors, Inc.. This represents a change in shares of 2,085.39% 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 21,395 20,416 2,085.39 6,135 2,578.60 0.0111
2026-02-17 2025-12-31 13F CLEAN HARBORS COM 184496107 979 -6,760 -87.35 230 -87.26 0.0004
2025-11-14 2025-09-30 13F CLEAN HARBORS COM 184496107 7,739 -10,697 -58.02 1,797 -57.84 0.0031
2025-08-14 2025-06-30 13F CLEAN HARBORS COM 184496107 18,436 -23,256 -55.78 4,262 -48.13 0.0081
2025-05-15 2025-03-31 13F CLEAN HARBORS COM 184496107 41,692 10,424 33.34 8,217 14.19 0.0208
2025-02-14 2024-12-31 13F CLEAN HARBORS COM 184496107 31,268 -5,918 -15.91 7,196 -19.94 0.0189
2024-11-14 2024-09-30 13F CLEAN HARBORS COM 184496107 37,186 -3,161 -7.83 8,988 -1.49 0.0234
2024-08-14 2024-06-30 13F CLEAN HARBORS COM 184496107 40,347 -7,426 -15.54 9,124 -5.13 0.0230
2024-05-15 2024-03-31 13F CLEAN HARBORS COM 184496107 47,773 4,669 10.83 9,617 27.85 0.0242
2024-02-14 2023-12-31 13F CLEAN HARBORS COM 184496107 43,104 7,522 -15.84 0.0209
2023-11-14 2023-09-30 13F CLEAN HARBORS COM 184496107 8,938 24.38 0.0277
2023-08-14 2023-06-30 13F CLEAN HARBORS COM 184496107 43,705 7,186 -0.58 0.0222
2023-05-15 2023-03-31 13F CLEAN HARBORS COM 184496107 7,229 34.22 0.0257
2023-02-14 2022-12-31 13F CLEAN HARBORS COM 184496107 47,191 21,048 80.51 5,385 87.30 0.0193
2022-11-14 2022-09-30 13F CLEAN HARBORS COM 184496107 26,143 2,875 15.28 0.0133
2022-08-15 2022-06-30 13F CLEAN HARBORS COM 184496107 2,494 -38.75 0.0106
2022-05-16 2022-03-31 13F CLEAN HARBORS COM 184496107 36,473 8,761 31.61 4,072 47.27 0.0142
2022-02-14 2021-12-31 13F CLEAN HARBORS COM 184496107 27,712 26 0.09 2,765 -3.86 0.0089
2021-11-15 2021-09-30 13F CLEAN HARBORS COM 184496107 27,686 32 0.12 2,876 11.69 0.0101
2021-08-16 2021-06-30 13F CLEAN HARBORS COM 184496107 27,654 21,819 373.93 2,575 424.44 0.0091
2021-05-17 2021-03-31 13F CLEAN HARBORS COM 184496107 5,835 -755 -11.46 491 -2.00 0.0022
2021-02-16 2020-12-31 13F CLEAN HARBORS COM 184496107 6,590 -4,239 -39.14 501 -17.33 0.0022
2020-11-16 2020-09-30 13F CLEAN HARBORS COM 184496107 10,829 6,179 132.88 606 117.20 0.0024
2020-08-14 2020-06-30 13F CLEAN HARBORS COM 184496107 4,650 -76,074 -94.24 279 -93.27 0.0014
2020-05-15 2020-03-31 13F CLEAN HARBORS COM 184496107 80,724 -26,505 -24.72 4,144 -54.93 0.0268
2020-02-18 2019-12-31 13F CLEAN HARBORS COM 184496107 107,229 95,031 779.07 9,195 877.15 0.0302
2019-11-14 2019-09-30 13F CLEAN HARBORS COM 184496107 12,198 -1,477 -10.80 941 -3.09 0.0035
2019-08-14 2019-06-30 13F CLEAN HARBORS COM 184496107 13,675 -46,549 -77.29 971 -77.46 0.0035
2019-05-15 2019-03-31 13F CLEAN HARBORS COM 184496107 60,224 18,076 42.89 4,308 107.02 0.0163
2019-02-14 2018-12-31 13F CLEAN HARBORS COM 184496107 42,148 -63,867 -60.24 2,081 -72.58 0.0093
2018-11-14 2018-09-30 13F CLEAN HARBORS COM 184496107 106,015 93,281 732.53 7,589 973.41 0.0277
2018-08-14 2018-06-30 13F CLEAN HARBORS COM 184496107 12,734 12,734 707 0.0029
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.