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 |
|---|---|---|---|
| 4 | Insider transaction | Nov 3, 2026 | Nov 2, 2026 |
| 4 | Insider transaction | Nov 2, 2026 | Oct 29, 2026 |
| 10-Q | Quarterly report | Oct 28, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 28, 2026 | Oct 28, 2026 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Oct 5, 2026 | Oct 1, 2026 |
| 8-K |
Current report
Other events
|
Sep 18, 2026 | Sep 17, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 14, 2026 |
| 144 | Notice of proposed sale | Aug 14, 2026 | — |
| 4/A | Filing | Aug 14, 2026 | Jul 1, 2026 |
| 4/A | Filing | Aug 14, 2026 | Mar 18, 2026 |
| 4/A | Filing | Aug 14, 2026 | Mar 13, 2026 |
| 4/A | Filing | Aug 14, 2026 | Feb 23, 2026 |
| 4/A | Filing | Aug 14, 2026 | Jul 1, 2026 |
| 4/A | Filing | Aug 14, 2026 | Mar 13, 2026 |
| 4/A | Filing | Aug 14, 2026 | Feb 20, 2026 |
| 8-K |
Current report
Other events
|
Aug 12, 2026 | Aug 12, 2026 |
| 4 | Insider transaction | Aug 12, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Aug 11, 2026 | Jul 1, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 6, 2026 | — |
| 144 | Notice of proposed sale | Aug 3, 2026 | — |
| 4 | Insider transaction | Aug 3, 2026 | Aug 3, 2026 |
| 10-Q | Quarterly report | Jul 29, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Jul 29, 2026 | Jul 29, 2026 |
| 4 | Insider transaction | Jul 20, 2026 | Jul 17, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 26, 2026 |
| 144 | Notice of proposed sale | May 26, 2026 | — |
| 4 | Insider transaction | May 22, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 20, 2026 |
| 8-K |
Current report
Shareholder vote results
|
May 20, 2026 | May 20, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
May 20, 2026 | May 19, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| 8-K |
Current report
Other events
|
May 14, 2026 | May 14, 2026 |
| 4/A | Filing | May 14, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 12, 2026 | May 11, 2026 |
| 10-Q | Quarterly report | May 6, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 6, 2026 | May 6, 2026 |
| ARS | Annual report to shareholders | Apr 10, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 10, 2026 | — |
| DEF 14A | Proxy statement | Apr 10, 2026 | May 20, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 4 | Insider transaction | Mar 19, 2026 | Mar 18, 2026 |
| 4 | Insider transaction | Mar 19, 2026 | Mar 18, 2026 |
| 144 | Notice of proposed sale | Mar 18, 2026 | — |
| 144 | Notice of proposed sale | Mar 18, 2026 | — |
| 144 | Notice of proposed sale | Mar 17, 2026 | — |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 4, 2026 |
| 144 | Notice of proposed sale | Mar 4, 2026 | — |
| 4 | Insider transaction | Feb 24, 2026 | Feb 23, 2026 |
| 144 | Notice of proposed sale | Feb 23, 2026 | — |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 144 | Notice of proposed sale | Feb 20, 2026 | — |
| 144 | Notice of proposed sale | Feb 20, 2026 | — |
| 4 | Insider transaction | Feb 20, 2026 | Feb 20, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 20, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 19, 2026 |
| 144 | Notice of proposed sale | Feb 19, 2026 | — |
| 144 | Notice of proposed sale | Feb 19, 2026 | — |
| 10-K | Annual report | Feb 18, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 18, 2026 | Feb 18, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 10, 2026 | — |
| 4 | Insider transaction | Feb 3, 2026 | Feb 1, 2026 |
| 4 | Insider transaction | Feb 3, 2026 | Feb 1, 2026 |
| 4 | Insider transaction | Feb 3, 2026 | Feb 1, 2026 |
| 4 | Insider transaction | Feb 3, 2026 | Feb 1, 2026 |
| 4 | Insider transaction | Feb 3, 2026 | Feb 1, 2026 |
| 4 | Insider transaction | Feb 3, 2026 | Feb 1, 2026 |
| 4 | Insider transaction | Feb 3, 2026 | Feb 1, 2026 |
| 4 | Insider transaction | Feb 3, 2026 | Feb 1, 2026 |
| 4 | Insider transaction | Feb 3, 2026 | Feb 1, 2026 |
| 4 | Insider transaction | Feb 3, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 17, 2025 |
| 4 | Insider transaction | Dec 17, 2025 | Dec 15, 2025 |
| 4 | Insider transaction | Dec 17, 2025 | Dec 15, 2025 |
| 4 | Insider transaction | Dec 17, 2025 | Dec 15, 2025 |
| 4 | Insider transaction | Dec 17, 2025 | Dec 16, 2025 |
| 144 | Notice of proposed sale | Dec 16, 2025 | — |
| 4 | Insider transaction | Dec 11, 2025 | Dec 9, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Nov 14, 2025 | Nov 13, 2025 |
| 4 | Insider transaction | Nov 4, 2025 | Nov 1, 2025 |
| 10-Q | Quarterly report | Oct 29, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Oct 29, 2025 | Oct 29, 2025 |
| 8-K |
Current report
Material agreement, New debt
|
Oct 10, 2025 | Oct 9, 2025 |
| 8-K |
Current report
Other events
|
Sep 26, 2025 | Sep 25, 2025 |
| 4 | Insider transaction | Sep 17, 2025 | Sep 16, 2025 |
| 4 | Insider transaction | Aug 6, 2025 | Aug 5, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Aug 1, 2025 |
| 144 | Notice of proposed sale | Jul 31, 2025 | — |
| 3 | Initial insider ownership | Jul 30, 2025 | Jul 22, 2025 |
| 10-Q | Quarterly report | Jul 30, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Jul 30, 2025 | Jul 30, 2025 |
| 4 | Insider transaction | Jul 3, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 3, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 3, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 3, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 3, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 3, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 3, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 3, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jun 16, 2025 | Jun 13, 2025 |
| 144 | Notice of proposed sale | Jun 13, 2025 | — |
| 4 | Insider transaction | Jun 9, 2025 | Jun 6, 2025 |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 144 | Notice of proposed sale | Jun 6, 2025 | — |
| 4 | Insider transaction | Jun 6, 2025 | Jun 5, 2025 |
| 144 | Notice of proposed sale | Jun 5, 2025 | — |
| 144 | Notice of proposed sale | Jun 4, 2025 | — |
| 4 | Insider transaction | Jun 3, 2025 | Jun 2, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 2, 2025 |
| 4 | Insider transaction | May 29, 2025 | May 28, 2025 |
| 144 | Notice of proposed sale | May 28, 2025 | — |
| 4 | Insider transaction | May 28, 2025 | May 27, 2025 |
| 4 | Insider transaction | May 28, 2025 | May 27, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 21, 2025 |
| 144 | Notice of proposed sale | May 22, 2025 | — |
| 8-K |
Current report
Shareholder vote results
|
May 21, 2025 | May 21, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 7, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 7, 2025 | — |
| 4 | Insider transaction | May 2, 2025 | May 2, 2025 |
| 10-Q | Quarterly report | Apr 30, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
Apr 30, 2025 | Apr 30, 2025 |
| ARS | Annual report to shareholders | Apr 16, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Apr 11, 2025 | — |
| DEF 14A | Proxy statement | Apr 11, 2025 | May 21, 2025 |
| 4 | Insider transaction | Apr 3, 2025 | Apr 1, 2025 |
| 4/A | Filing | Apr 2, 2025 | Mar 17, 2025 |
| 4/A | Filing | Apr 2, 2025 | Mar 17, 2025 |
| 4/A | Filing | Apr 2, 2025 | Mar 17, 2025 |
| 4/A | Filing | Apr 2, 2025 | Mar 17, 2025 |
| 4/A | Filing | Apr 2, 2025 | Mar 17, 2025 |
| 4/A | Filing | Apr 2, 2025 | Mar 17, 2025 |
| 4/A | Filing | Apr 2, 2025 | Mar 17, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4/A | Filing | Mar 18, 2025 | Feb 1, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4/A | Filing | Mar 18, 2025 | Feb 1, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4/A | Filing | Mar 18, 2025 | Feb 1, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4/A | Filing | Mar 18, 2025 | Feb 1, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4/A | Filing | Mar 18, 2025 | Feb 1, 2025 |
| 4 | Insider transaction | Mar 11, 2025 | Mar 10, 2025 |
| 4/A | Filing | Mar 11, 2025 | Feb 1, 2025 |
| 4 | Insider transaction | Mar 11, 2025 | Mar 10, 2025 |
| 4/A | Filing | Mar 11, 2025 | Feb 1, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Mar 3, 2025 |
| 144 | Notice of proposed sale | Mar 3, 2025 | — |
| 144 | Notice of proposed sale | Mar 3, 2025 | — |
| 10-K | Annual report | Feb 19, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Feb 19, 2025 | Feb 18, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 19, 2025 | Feb 19, 2025 |
| 4/A | Filing | Feb 11, 2025 | Feb 1, 2025 |
| 4 | Insider transaction | Feb 11, 2025 | Nov 1, 2024 |
| 4 | Insider transaction | Feb 5, 2025 | Feb 1, 2025 |
Showing 200 filings, the most recent 200. 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.