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 |
|---|---|---|---|
| DEFA14A | Additional proxy material | Apr 10, 2026 | — |
| DEF 14A | Proxy statement | Apr 10, 2026 | May 20, 2026 |
| DEFA14A | Additional proxy material | Apr 11, 2025 | — |
| DEF 14A | Proxy statement | Apr 11, 2025 | May 21, 2025 |
| DEFA14A | Additional proxy material | Apr 10, 2024 | — |
| DEF 14A | Proxy statement | Apr 10, 2024 | May 22, 2024 |
| DEFA14A | Additional proxy material | Apr 13, 2023 | — |
| DEF 14A | Proxy statement | Apr 13, 2023 | — |
| DEFA14A | Additional proxy material | Apr 14, 2022 | — |
| DEF 14A | Proxy statement | Apr 14, 2022 | May 25, 2022 |
| DEFA14A | Additional proxy material | Apr 28, 2021 | — |
| DEF 14A | Proxy statement | Apr 23, 2021 | Dec 31, 2020 |
| PRE 14A | Preliminary proxy statement | Apr 13, 2021 | Jun 2, 2021 |
| DEFA14A | Additional proxy material | Apr 24, 2020 | — |
| DEF 14A | Proxy statement | Apr 24, 2020 | Dec 31, 2019 |
| DEFA14A | Additional proxy material | Apr 24, 2019 | — |
| DEF 14A | Proxy statement | Apr 24, 2019 | Dec 31, 2018 |
| DEFA14A | Additional proxy material | Apr 25, 2018 | — |
| DEF 14A | Proxy statement | Apr 25, 2018 | Dec 31, 2017 |
Showing 19 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.