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 |
|---|---|---|---|
| 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 |
| 8-K |
Current report
Other events
|
Aug 12, 2026 | Aug 12, 2026 |
| 10-Q | Quarterly report | Jul 29, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Jul 29, 2026 | Jul 29, 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 |
| 8-K |
Current report
Other events
|
May 14, 2026 | May 14, 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 |
| 10-K | Annual report | Feb 18, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 18, 2026 | Feb 18, 2026 |
| 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 |
| 10-Q | Quarterly report | Jul 30, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Jul 30, 2025 | Jul 30, 2025 |
| 8-K |
Current report
Shareholder vote results
|
May 21, 2025 | May 21, 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 |
| 10-K | Annual report | Feb 19, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 19, 2025 | Feb 19, 2025 |
| 10-Q | Quarterly report | Oct 30, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Oct 30, 2024 | Oct 30, 2024 |
| 8-K |
Current report
Material agreement, New debt
|
Oct 11, 2024 | Oct 8, 2024 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Sep 3, 2024 | Aug 29, 2024 |
| 10-Q | Quarterly report | Jul 31, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Jul 31, 2024 | Jul 31, 2024 |
| 8-K |
Current report
Material agreement, New debt
|
Jul 2, 2024 | Jun 28, 2024 |
| S-8 | Employee stock plan registration | May 23, 2024 | — |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
May 23, 2024 | May 22, 2024 |
| 10-Q | Quarterly report | May 1, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 1, 2024 | May 1, 2024 |
| ARS | Annual report to shareholders | Apr 15, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Apr 10, 2024 | — |
| DEF 14A | Proxy statement | Apr 10, 2024 | May 22, 2024 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Mar 25, 2024 | Mar 22, 2024 |
| 10-K | Annual report | Feb 21, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Feb 21, 2024 | Feb 21, 2024 |
| 8-K |
Current report
Other events
|
Feb 6, 2024 | Feb 2, 2024 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 28, 2023 | Dec 27, 2023 |
| 8-K |
Current report
Other events
|
Dec 7, 2023 | Dec 7, 2023 |
| 10-Q | Quarterly report | Nov 1, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 1, 2023 | Nov 1, 2023 |
| 10-Q | Quarterly report | Aug 2, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 2, 2023 | Aug 2, 2023 |
| 8-K |
Current report
Shareholder vote results
|
May 24, 2023 | May 24, 2023 |
| 10-Q | Quarterly report | May 3, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations
|
May 3, 2023 | May 3, 2023 |
| ARS | Annual report to shareholders | Apr 13, 2023 | Dec 31, 2022 |
| DEFA14A | Additional proxy material | Apr 13, 2023 | — |
| DEF 14A | Proxy statement | Apr 13, 2023 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 29, 2023 | Mar 29, 2023 |
| 8-K |
Current report
Officer or director change
|
Mar 16, 2023 | Mar 16, 2023 |
| 10-K | Annual report | Mar 1, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Officer or director change
|
Mar 1, 2023 | Mar 1, 2023 |
| 8-K |
Current report
Results of operations
|
Mar 1, 2023 | Mar 1, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Jan 25, 2023 | Jan 24, 2023 |
| 8-K |
Current report
Material agreement, Other events
|
Jan 18, 2023 | Jan 17, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 17, 2023 | Jan 17, 2023 |
| 10-Q | Quarterly report | Nov 2, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Officer or director change
|
Nov 2, 2022 | Nov 1, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 2, 2022 | Nov 2, 2022 |
| 8-K |
Current report
Officer or director change
|
Sep 6, 2022 | Aug 31, 2022 |
| 10-Q | Quarterly report | Aug 3, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 3, 2022 | Aug 3, 2022 |
| 8-K |
Current report
Shareholder vote results
|
May 25, 2022 | May 25, 2022 |
| 10-Q | Quarterly report | May 4, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Results of operations
|
May 4, 2022 | May 4, 2022 |
| DEFA14A | Additional proxy material | Apr 14, 2022 | — |
| DEF 14A | Proxy statement | Apr 14, 2022 | May 25, 2022 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Mar 16, 2022 | Mar 16, 2022 |
| 10-K | Annual report | Feb 23, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 23, 2022 | Feb 23, 2022 |
| 10-Q | Quarterly report | Nov 3, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Results of operations
|
Nov 3, 2021 | Nov 3, 2021 |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, New debt, Regulation FD disclosure
|
Oct 12, 2021 | Oct 8, 2021 |
| 8-K |
Current report
Officer or director change
|
Sep 10, 2021 | Sep 8, 2021 |
| 10-Q | Quarterly report | Aug 4, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Aug 4, 2021 | Aug 3, 2021 |
| 8-K |
Current report
Results of operations
|
Aug 4, 2021 | Aug 4, 2021 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 3, 2021 | Jun 2, 2021 |
| 10-Q | Quarterly report | May 5, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
May 5, 2021 | May 5, 2021 |
| 8-K | Current report | May 5, 2021 | May 5, 2021 |
| 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 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Apr 6, 2021 | Apr 1, 2021 |
| 10-K | Annual report | Feb 24, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Results of operations
|
Feb 24, 2021 | Feb 24, 2021 |
| 10-Q | Quarterly report | Nov 4, 2020 | Sep 30, 2020 |
| 8-K |
Current report
Results of operations
|
Nov 4, 2020 | Nov 4, 2020 |
| 8-K |
Current report
Material agreement
|
Oct 30, 2020 | Oct 28, 2020 |
| 10-Q | Quarterly report | Aug 5, 2020 | Jun 30, 2020 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2020 | Aug 5, 2020 |
| S-8 | Employee stock plan registration | Jun 3, 2020 | — |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 3, 2020 | Jun 3, 2020 |
| 10-Q | Quarterly report | Apr 29, 2020 | Mar 31, 2020 |
| 8-K |
Current report
Results of operations
|
Apr 29, 2020 | Apr 29, 2020 |
| DEFA14A | Additional proxy material | Apr 24, 2020 | — |
| DEF 14A | Proxy statement | Apr 24, 2020 | Dec 31, 2019 |
| 10-K | Annual report | Feb 26, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Results of operations
|
Feb 26, 2020 | Feb 26, 2020 |
| 8-K |
Current report
Officer or director change
|
Dec 17, 2019 | Dec 12, 2019 |
| 10-Q | Quarterly report | Oct 30, 2019 | Sep 30, 2019 |
| 8-K |
Current report
Results of operations
|
Oct 30, 2019 | Oct 30, 2019 |
| 10-Q | Quarterly report | Jul 31, 2019 | Jun 30, 2019 |
| 8-K |
Current report
Results of operations
|
Jul 31, 2019 | Jul 31, 2019 |
| 8-K |
Current report
Material agreement, New debt
|
Jul 3, 2019 | Jul 2, 2019 |
| 8-K |
Current report
Other events
|
Jul 2, 2019 | Jul 2, 2019 |
| 8-K |
Current report
Material agreement, Other events
|
Jun 19, 2019 | Jun 18, 2019 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 18, 2019 | Jun 18, 2019 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 6, 2019 | Jun 5, 2019 |
| 8-K |
Current report
Officer or director change
|
May 9, 2019 | May 3, 2019 |
| 10-Q | Quarterly report | May 1, 2019 | Mar 31, 2019 |
| 8-K |
Current report
Results of operations
|
May 1, 2019 | May 1, 2019 |
| DEFA14A | Additional proxy material | Apr 24, 2019 | — |
| DEF 14A | Proxy statement | Apr 24, 2019 | Dec 31, 2018 |
| 10-K | Annual report | Feb 27, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Results of operations
|
Feb 27, 2019 | Feb 27, 2019 |
| 10-Q | Quarterly report | Oct 31, 2018 | Sep 30, 2018 |
| 8-K |
Current report
Results of operations
|
Oct 31, 2018 | Oct 31, 2018 |
| 10-Q | Quarterly report | Aug 1, 2018 | Jun 30, 2018 |
| 8-K |
Current report
Results of operations
|
Aug 1, 2018 | Aug 1, 2018 |
| 8-K |
Current report
Material agreement, Agreement ended, New debt
|
Jul 20, 2018 | Jul 19, 2018 |
| 8-K |
Current report
Other events
|
Jul 3, 2018 | Jul 3, 2018 |
| 8-K |
Current report
Other events
|
Jun 19, 2018 | Jun 19, 2018 |
| 8-K |
Current report
Shareholder vote results
|
Jun 6, 2018 | Jun 6, 2018 |
| 8-K/A | Amended current report | May 4, 2018 | May 4, 2018 |
| 10-Q | Quarterly report | May 2, 2018 | Mar 31, 2018 |
| 8-K |
Current report
Regulation FD disclosure
|
May 2, 2018 | May 2, 2018 |
| 8-K |
Current report
Results of operations
|
May 2, 2018 | May 2, 2018 |
| DEFA14A | Additional proxy material | Apr 25, 2018 | — |
| DEF 14A | Proxy statement | Apr 25, 2018 | Dec 31, 2017 |
| 8-K |
Current report
Material agreement, New debt
|
Apr 17, 2018 | Apr 17, 2018 |
Showing 145 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.