Clean Harbors, Inc.
MX ˙ BMV ˙ US1844961078
SecurityMX:CLH1 / Clean Harbors, Inc.
InstitutionStifel Financial Corp
Latest Disclosed Ownership24,655 shares
Latest Disclosed Value $ 7,069,306
Stifel Financial Corp reports 58.92% decrease in ownership of CLH1 / Clean Harbors, Inc.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 24,655 shares of Clean Harbors, Inc. (MX:CLH1) valued at $7,069,306 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 60,013 shares of Clean Harbors, Inc.. This represents a change in shares of -58.92% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-12 2026-03-31 13F CLEAN HARBORS COM 184496107 24,655 -35,358 -58.92 7,069 -49.76 0.0015
2026-02-13 2025-12-31 13F CLEAN HARBORS COM 184496107 60,013 -6,049 -9.16 14,072 -8.27 0.0127
2025-11-12 2025-09-30 13F CLEAN HARBORS COM 184496107 66,062 -1,377 -2.04 15,341 -1.60 0.0140
2025-08-14 2025-06-30 13F CLEAN HARBORS COM 184496107 67,439 -331 -0.49 15,591 16.72 0.0152
2025-05-14 2025-03-31 13F CLEAN HARBORS COM 184496107 67,770 -16,620 -19.69 13,358 -31.22 0.0142
2025-02-13 2024-12-31 13F CLEAN HARBORS COM 184496107 84,390 415 0.49 19,422 -4.32 0.0202
2024-11-14 2024-09-30 13F CLEAN HARBORS COM 184496107 83,975 -4,301 -4.87 20,298 1.67 0.0213
2024-08-13 2024-06-30 13F CLEAN HARBORS COM 184496107 88,276 3,900 4.62 19,964 17.53 0.0225
2024-05-14 2024-03-31 13F CLEAN HARBORS COM 184496107 84,376 -1,342 -1.57 16,986 13.55 0.0194
2024-02-12 2023-12-31 13F CLEAN HARBORS COM 184496107 85,718 12,900 17.72 14,959 22.75 0.0188
2023-11-13 2023-09-30 13F CLEAN HARBORS COM 184496107 72,818 -10,755 -12.87 12,187 -11.32 0.0171
2023-08-14 2023-06-30 13F CLEAN HARBORS COM 184496107 83,573 11,231 15.52 13,742 33.24 0.0188
2023-05-12 2023-03-31 13F CLEAN HARBORS COM 184496107 72,342 -640 -0.88 10,313 23.84 0.0148
2023-02-13 2022-12-31 13F CLEAN HARBORS COM 184496107 72,982 21,206 40.96 8,329 46.26 0.0125
2022-11-14 2022-09-30 13F CLEAN HARBORS COM 184496107 51,776 -1,405 -2.64 5,694 22.14 0.0093
2022-08-15 2022-06-30 13F CLEAN HARBORS COM 184496107 53,181 27,988 111.09 4,662 65.73 0.0073
2022-05-13 2022-03-31 13F CLEAN HARBORS COM 184496107 25,193 3,276 14.95 2,813 28.62 0.0038
2022-02-14 2021-12-31 13F CLEAN HARBORS COM 184496107 21,917 3,505 19.04 2,187 14.38 0.0029
2021-11-15 2021-09-30 13F CLEAN HARBORS COM 184496107 18,412 913 5.22 1,912 17.30 0.0028
2021-08-13 2021-06-30 13F CLEAN HARBORS COM 184496107 17,499 2,193 14.33 1,630 26.65 0.0024
2021-05-14 2021-03-31 13F CLEAN HARBORS COM 184496107 15,306 5,803 61.06 1,287 78.01 0.0021
2021-02-12 2020-12-31 13F CLEAN HARBORS COM 184496107 9,503 4,051 74.30 723 137.05 0.0013
2020-11-16 2020-09-30 13F CLEAN HARBORS COM 184496107 5,452 1,535 39.19 305 29.79 0.0006
2020-08-14 2020-06-30 13F CLEAN HARBORS COM 184496107 3,917 -2,022 -34.05 235 -22.70 0.0005
2020-05-14 2020-03-31 13F CLEAN HARBORS COM 184496107 5,939 -2,206 -27.08 304 -56.70 0.0008
2020-02-13 2019-12-31 13F CLEAN HARBORS COM 184496107 8,145 2,703 49.67 702 67.94 0.0015
2019-11-19 2019-09-30 13F/A-1 CLEAN HARBORS COM 184496107 5,442 -371 -6.38 418 1.95 0.0011
2019-11-13 2019-09-30 13F CLEAN HARBORS COM 184496107 5,442 -371 418 234.3100
2019-08-14 2019-06-30 13F CLEAN HARBORS COM 184496107 5,813 -249 -4.11 410 -5.53 0.0011
2019-05-14 2019-03-31 13F CLEAN HARBORS COM 184496107 6,062 6,062 434 0.0012
2019-02-13 2018-12-31 13F CLEAN HARBORS COM 184496107 0 -4,109 -100.00 0 -100.00
2018-11-13 2018-09-30 13F CLEAN HARBORS COM 184496107 4,109 4,109 294 0.0008
2018-08-14 2018-06-30 13F CLEAN HARBORS COM 184496107 0 -4,513 -100.00 0 -100.00
2018-05-11 2018-03-31 13F CLEAN HARBORS COM 184496107 4,513 294 6.97 223 -3.04 0.0007
2018-02-14 2017-12-31 13F CLEAN HARBORS COM 184496107 4,219 512 13.81 230 9.00 0.0007
2017-11-13 2017-09-30 13F CLEAN HARBORS COM 184496107 3,707 3,707 211 0.0007
2017-02-16 2016-12-31 13F CLEAN HARBORS COM 184496107 0 -8,919 -100.00 0 -100.00
2016-11-15 2016-09-30 13F CLEAN HARBORS COM 184496107 8,919 4,826 117.91 424 98.13 0.0019
2016-08-17 2016-06-30 13F CLEAN HARBORS COM 184496107 4,093 -379 -8.47 214 -3.17 0.0010
2016-05-16 2016-03-31 13F CLEAN HARBORS COM 184496107 4,472 -6,951 -60.85 221 -53.57 0.0012
2016-03-21 2015-12-31 13F/A-2 CLEAN HARBORS COM 184496107 11,423 -1,996 -14.87 476 -19.32 0.0025
2016-02-26 2015-12-31 13F/A-1 CLEAN HARBORS COM 184496107 11,355 -68 473 0.0025
2016-02-16 2015-12-31 13F CLEAN HARBORS COM 184496107 11,355 4,697
2015-11-16 2015-09-30 13F CLEAN HARBORS COM 184496107 13,419 -7,382 -35.49 590 -47.18 0.0033
2015-08-17 2015-06-30 13F/A-1 CLEAN HARBORS COM 184496107 20,801 15,264 275.67 1,117 255.73 0.0058
2015-08-17 2015-06-30 13F CLEAN HARBORS COM 184496107 20,801 1,117
2015-05-14 2015-03-31 13F CLEAN HARBORS COM 184496107 5,537 1,010 22.31 314 44.70 0.0017
2015-02-13 2014-12-31 13F CLEAN HARBORS COM 184496107 4,527 4,527 217 0.0012
2014-08-14 2014-06-30 13F CLEAN HARBORS COM 184496107 0 -5,332 -100.00 0 -100.00
2014-05-15 2014-03-31 13F CLEAN HARBORS COM 184496107 5,332 5,332 292 0.0028
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.