Clean Harbors, Inc.
MX ˙ BMV ˙ US1844961078
SecurityMX:CLH1 / Clean Harbors, Inc.
InstitutionXML Financial, LLC
Latest Disclosed Ownership1,267 shares
Latest Disclosed Value $ 363,287
XML Financial, LLC ownership in CLH1 / Clean Harbors, Inc.

On April 16, 2026 - XML Financial, LLC filed a 13F-HR form disclosing ownership of 1,267 shares of Clean Harbors, Inc. (MX:CLH1) valued at $363,287 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 1,267 shares of Clean Harbors, Inc.. This represents a change in shares of 0.00% 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)
2026-04-16 2026-03-31 13F CLEAN HARBORS COM 184496107 1,267 0 0.00 363 22.22 0.0293
2026-02-11 2025-12-31 13F CLEAN HARBORS COM 184496107 1,267 0 0.00 297 1.02 0.0242
2025-10-20 2025-09-30 13F CLEAN HARBORS COM 184496107 1,267 0 0.00 294 0.68 0.0240
2025-07-17 2025-06-30 13F CLEAN HARBORS COM 184496107 1,267 -250 -16.48 293 -2.34 0.0253
2025-04-22 2025-03-31 13F CLEAN HARBORS COM 184496107 1,517 37 2.50 299 -12.06 0.0279
2025-01-17 2024-12-31 13F CLEAN HARBORS COM 184496107 1,480 250 20.33 341 14.48 0.0312
2024-11-01 2024-09-30 13F CLEAN HARBORS COM 184496107 1,230 0 0.00 297 6.83 0.0276
2024-07-22 2024-06-30 13F CLEAN HARBORS COM 184496107 1,230 0 0.00 278 12.55 0.0280
2024-05-15 2024-03-31 13F CLEAN HARBORS COM 184496107 1,230 0 0.00 248 15.42 0.0254
2024-02-14 2023-12-31 13F CLEAN HARBORS COM 184496107 1,230 0 0.00 215 4.39 0.0226
2023-11-06 2023-09-30 13F CLEAN HARBORS COM 184496107 1,230 0 0.00 206 1.49 0.0247
2023-08-07 2023-06-30 13F CLEAN HARBORS COM 184496107 1,230 1,230 202 0.0234
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.