Clean Harbors, Inc.
MX ˙ BMV ˙ US1844961078
SecurityMX:CLH1 / Clean Harbors, Inc.
InstitutionBessemer Group Inc
Latest Disclosed Ownership932,027 shares
Latest Disclosed Value $ 267,239
Bessemer Group Inc reports 1.83% increase in ownership of CLH1 / Clean Harbors, Inc.

On May 6, 2026 - Bessemer Group Inc filed a 13F-HR form disclosing ownership of 932,027 shares of Clean Harbors, Inc. (MX:CLH1) valued at $267,239 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 915,280 shares of Clean Harbors, Inc.. This represents a change in shares of 1.83% 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)
2026-05-06 2026-03-31 13F CLEAN HARBORS SC 184496107 932,027 16,747 1.83 267 24.77 0.4201
2026-02-05 2025-12-31 13F CLEAN HARBORS SC 184496107 915,280 -182,422 -16.62 215 -15.75 0.3295
2025-11-05 2025-09-30 13F CLEAN HARBORS SC 184496107 1,097,702 87,322 8.64 255 9.01 0.3898
2025-08-01 2025-06-30 13F CLEAN HARBORS SC 184496107 1,010,380 -2,442 -0.24 234 17.09 0.3792
2025-04-23 2025-03-31 13F CLEAN HARBORS SC 184496107 1,012,822 -82,341 -7.52 200 -21.03 0.3579
2025-02-13 2024-12-31 13F CLEAN HARBORS SC 184496107 1,095,163 9,595 0.88 252 -3.82 0.4114
2024-11-12 2024-09-30 13F CLEAN HARBORS SC 184496107 1,085,568 -101,396 -8.54 262 -2.24 0.4322
2024-08-13 2024-06-30 13F CLEAN HARBORS SC 184496107 1,186,964 173,515 17.12 268 31.37 0.4734
2024-08-13 2024-03-31 13F/A-1 CLEAN HARBORS SC 184496107 1,013,449 12,411 1.24 204 17.24 0.3687
2024-05-13 2024-03-31 13F CLEAN HARBORS SC 184496107 1,013,449 12,411 204 0.3687
2024-02-09 2023-12-31 13F CLEAN HARBORS SC 184496107 1,001,038 -476 -0.05 175 4.19 0.3404
2023-11-13 2023-09-30 13F CLEAN HARBORS SC 184496107 1,001,514 4,072 0.41 168 1.83 0.3680
2023-08-10 2023-06-30 13F CLEAN HARBORS SC 184496107 997,442 88,779 9.77 164 27.13 0.3480
2023-05-10 2023-03-31 13F CLEAN HARBORS SC 184496107 908,663 908,663 130 0.3075
2023-02-13 2022-12-31 13F CLEAN HARBORS SC 184496107 0 -218 -100.00 0 -100.00
2022-11-09 2022-09-30 13F CLEAN HARBORS SC 184496107 218 218 24 0.0001
2020-04-30 2020-03-31 13F CLEAN HARBORS SC 184496107 0 -411 -100.00 0 -100.00
2020-02-04 2019-12-31 13F CLEAN HARBORS SC 184496107 411 0 0.00 35 9.38 0.0001
2019-11-07 2019-09-30 13F CLEAN HARBORS SC 184496107 411 -2,115 -83.73 32 -82.22 0.0001
2019-07-19 2019-06-30 13F CLEAN HARBORS SC 184496107 2,526 0 0.00 180 -0.55 0.0006
2019-05-13 2019-03-31 13F CLEAN HARBORS SC 184496107 2,526 2,526 181 0.0007
2016-05-11 2016-03-31 13F CLEAN HARBORS SC 184496107 0 0 0 0.0000
2016-02-12 2015-12-31 13F CLEAN HARBORS SC 184496107 0 -2,000 -100.00 0 -100.00
2015-11-16 2015-09-30 13F CLEAN HARBORS SC 184496107 2,000 0 0.00 88 -17.76 0.0005
2015-08-14 2015-06-30 13F CLEAN HARBORS SC 184496107 2,000 0 0.00 107 -6.14 0.0006
2015-06-18 2015-03-31 13F/A-1 CLEAN HARBORS SC 184496107 2,000 2,000 114 0.0006
2015-05-14 2015-03-31 13F CLEAN HARBORS SC 184496107 2,000 114
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.