Clean Harbors Inc SEC filings CLH
Clean Harbors Inc has 1,004 filings in SEC EDGAR's recent list, going back to Apr 3, 2018. Its latest annual report, Form ARS, was filed on Apr 10, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 28, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 28, 2026 (results of operations, regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| ARS | Annual report to shareholders | Apr 10, 2026 | Dec 31, 2025 |
| 10-K | Annual report | Feb 18, 2026 | Dec 31, 2025 |
| ARS | Annual report to shareholders | Apr 16, 2025 | Dec 31, 2024 |
| 10-K | Annual report | Feb 19, 2025 | Dec 31, 2024 |
| ARS | Annual report to shareholders | Apr 15, 2024 | Dec 31, 2023 |
| 10-K | Annual report | Feb 21, 2024 | Dec 31, 2023 |
| ARS | Annual report to shareholders | Apr 13, 2023 | Dec 31, 2022 |
| 10-K | Annual report | Mar 1, 2023 | Dec 31, 2022 |
| 10-K | Annual report | Feb 23, 2022 | Dec 31, 2021 |
| 10-K | Annual report | Feb 24, 2021 | Dec 31, 2020 |
| 10-K | Annual report | Feb 26, 2020 | Dec 31, 2019 |
| 10-K | Annual report | Feb 27, 2019 | Dec 31, 2018 |
Showing 12 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Hazardous Waste Management (SIC 4955)
- Listed as
- CLH (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- MA
- Headquarters
- Norwell, MA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 822818
Other Hazardous Waste Management companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.