Clean Harbors, Inc.
MX ˙ BMV ˙ US1844961078
SecurityMX:CLH1 / Clean Harbors, Inc.
InstitutionPrudential Financial Inc
Latest Disclosed Ownership3,061 shares
Latest Disclosed Value $ 877,681
Prudential Financial Inc reports 8.93% decrease in ownership of CLH1 / Clean Harbors, Inc.

On May 13, 2026 - Prudential Financial Inc filed a 13F-HR form disclosing ownership of 3,061 shares of Clean Harbors, Inc. (MX:CLH1) valued at $877,681 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 3,361 shares of Clean Harbors, Inc.. This represents a change in shares of -8.93% 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 3,061 -300 -8.93 878 9.76 0.0006
2026-02-13 2025-12-31 13F CLEAN HARBORS COM 184496107 3,361 -1,977 -37.04 799 -35.51 0.0010
2025-11-13 2025-09-30 13F CLEAN HARBORS COM 184496107 5,338 -289 -5.14 1,240 -4.69 0.0015
2025-08-12 2025-06-30 13F CLEAN HARBORS COM 184496107 5,627 416 7.98 1,301 26.58 0.0017
2025-05-13 2025-03-31 13F CLEAN HARBORS COM 184496107 5,211 527 11.25 1,027 -4.64 0.0015
2025-02-11 2024-12-31 13F CLEAN HARBORS COM 184496107 4,684 -12,958 -73.45 1,078 -74.74 0.0015
2024-11-14 2024-09-30 13F CLEAN HARBORS COM 184496107 17,642 -3,184 -15.29 4,264 -9.45 0.0060
2024-08-13 2024-06-30 13F CLEAN HARBORS COM 184496107 20,826 10,865 109.08 4,710 134.86 0.0071
2024-05-14 2024-03-31 13F CLEAN HARBORS COM 184496107 9,961 896 9.88 2,005 26.82 0.0028
2024-02-13 2023-12-31 13F CLEAN HARBORS COM 184496107 9,065 -863 -8.69 1,582 -4.82 0.0024
2023-11-13 2023-09-30 13F CLEAN HARBORS COM 184496107 9,928 -115 -1.15 1,662 0.61 0.0026
2023-08-11 2023-06-30 13F CLEAN HARBORS COM 184496107 10,043 -23,640 -70.18 1,651 -65.61 0.0024
2023-05-12 2023-03-31 13F CLEAN HARBORS COM 184496107 33,683 10,088 42.75 4,802 78.34 0.0075
2023-02-14 2022-12-31 13F CLEAN HARBORS COM 184496107 23,595 -5,213 -18.10 2,693 -14.54 0.0045
2022-11-04 2022-09-30 13F CLEAN HARBORS COM 184496107 28,808 -2,939 -9.26 3,150 13.27 0.0053
2022-08-15 2022-06-30 13F CLEAN HARBORS COM 184496107 31,747 -119,273 -78.98 2,781 -83.51 0.0044
2022-05-13 2022-03-31 13F CLEAN HARBORS COM 184496107 151,020 -266,483 -63.83 16,860 -59.52 0.0224
2022-02-14 2021-12-31 13F CLEAN HARBORS COM 184496107 417,503 125,710 43.08 41,654 37.44 0.0518
2021-11-15 2021-09-30 13F CLEAN HARBORS COM 184496107 291,793 163,028 126.61 30,308 152.71 0.0423
2021-08-16 2021-06-30 13F CLEAN HARBORS COM 184496107 128,765 106,564 480.00 11,993 542.71 0.0165
2021-05-12 2021-03-31 13F CLEAN HARBORS COM 184496107 22,201 14,880 203.25 1,866 235.01 0.0028
2021-08-16 2020-12-31 13F/A-1 CLEAN HARBORS COM 0076 184496107 7,321 -154 -2.06 557 32.94 0.0009
2021-02-16 2020-12-31 13F CLEAN HARBORS COM 184496107 7,321 -154 557 0.0009
2020-11-16 2020-09-30 13F CLEAN HARBORS COM 184496107 7,475 -240 -3.11 419 -9.50 0.0008
2020-08-12 2020-06-30 13F CLEAN HARBORS COM 184496107 7,715 -38,157 -83.18 463 -80.34 0.0009
2020-05-12 2020-03-31 13F CLEAN HARBORS COM 184496107 45,872 45,766 43,175.47 2,355 26,066.67 0.0052
2021-08-05 2019-12-31 13F/A-1 CLEAN HARBORS COM 0085 184496107 106 0 0.00 9 12.50 0.0023
2020-02-11 2019-12-31 13F CLEAN HARBORS COM 184496107 68,532 68,426 5,877 0.0087
2021-08-05 2019-09-30 13F/A-1 CLEAN HARBORS COM 0077 184496107 106 -4 -3.64 8 0.00 0.0026
2019-11-13 2019-09-30 13F CLEAN HARBORS COM 184496107 32,142 32,032 2,481 0.0039
2021-08-05 2019-06-30 13F/A-1 CLEAN HARBORS COM 184496107 110 22 25.00 8 33.33 0.0028
2019-08-08 2019-06-30 13F CLEAN HARBORS COM 184496107 32,212 32,124 2,290 0.0036
2021-08-05 2019-03-31 13F/A-1 CLEAN HARBORS COM 184496107 88 73 486.67 6 500.00 0.0025
2019-05-15 2019-03-31 13F CLEAN HARBORS COM 184496107 30,992 30,977 2,217 0.0037
2021-08-05 2018-12-31 13F/A-1 CLEAN HARBORS COM 184496107 15 -40,637 -99.96 1 -99.97 0.0008
2019-02-07 2018-12-31 13F CLEAN HARBORS COM 184496107 37,272 -3,380 1,839 0.0032
2018-11-07 2018-09-30 13F CLEAN HARBORS COM 184496107 40,652 -5,390 -11.71 2,910 13.76 0.0043
2018-08-13 2018-06-30 13F CLEAN HARBORS COM 184496107 46,042 13,160 40.02 2,558 59.38 0.0038
2018-05-04 2018-03-31 13F CLEAN HARBORS COM 184496107 32,882 -420 -1.26 1,605 -11.08 0.0024
2018-02-13 2017-12-31 13F CLEAN HARBORS COM 184496107 33,302 -50 -0.15 1,805 -4.55 0.0025
2017-11-02 2017-09-30 13F CLEAN HARBORS COM 184496107 33,352 406 1.23 1,891 2.83 0.0031
2017-08-07 2017-06-30 13F CLEAN HARBORS COM 184496107 32,946 515 1.59 1,839 1.94 0.0027
2017-05-10 2017-03-31 13F CLEAN HARBORS COM 184496107 32,431 1,878 6.15 1,804 6.12 0.0028
2017-02-07 2016-12-31 13F CLEAN HARBORS COM 184496107 30,553 -4,466 -12.75 1,700 1.19 0.0027
2016-11-04 2016-09-30 13F CLEAN HARBORS COM 184496107 35,019 -864 -2.41 1,680 -10.16 0.0028
2016-08-09 2016-06-30 13F CLEAN HARBORS COM 184496107 35,883 400 1.13 1,870 6.80 0.0031
2016-05-09 2016-03-31 13F CLEAN HARBORS COM 184496107 35,483 3,640 11.43 1,751 32.05 0.0031
2016-02-12 2015-12-31 13F CLEAN HARBORS COM 184496107 31,843 -100 -0.31 1,326 -5.62 0.0024
2015-11-10 2015-09-30 13F CLEAN HARBORS COM 184496107 31,943 -2,200 -6.44 1,405 -23.43 0.0028
2015-08-06 2015-06-30 13F CLEAN HARBORS COM 184496107 34,143 -3,750 -9.90 1,835 -14.73 0.0033
2015-05-01 2015-03-31 13F CLEAN HARBORS COM 184496107 37,893 -1,250 -3.19 2,152 14.41 0.0037
2015-02-06 2014-12-31 13F CLEAN HARBORS COM 184496107 39,143 3,400 9.51 1,881 -2.39 0.0034
2014-11-12 2014-09-30 13F CLEAN HARBORS COM 184496107 35,743 -3,700 -9.38 1,927 -23.95 0.0036
2014-08-13 2014-06-30 13F CLEAN HARBORS COM 184496107 39,443 3,330 9.22 2,534 28.04 0.0045
2014-05-14 2014-03-31 13F CLEAN HARBORS COM 184496107 36,113 930 2.64 1,979 -6.21 0.0037
2014-02-11 2013-12-31 13F CLEAN HARBORS COM 184496107 35,183 -1,750 -4.74 2,110 -2.59 0.0042
2013-11-07 2013-09-30 13F CLEAN HARBORS COM 184496107 36,933 1,390 3.91 2,166 20.60 0.0046
2013-08-07 2013-06-30 13F CLEAN HARBORS COM 184496107 35,543 35,543 1,796 0.0040
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.