# CLEAN HARBORS INC — DEF 14A

CLEAN HARBORS INC of NORWELL, MA filed a DEF 14A with the SEC on 2026-04-10. Industry: Hazardous Waste Management.

## Filing

- Filed: 2026-04-10
- Form: DEF 14A
- Accession: 0000822818-26-000013
- Registrant: CLEAN HARBORS INC
- CIK: 0000822818
- Industry (SIC): Hazardous Waste Management (4955)
- State of incorporation: MA
- Location: NORWELL, MA

## Documents (25)

_Showing 15 of 25 documents._

| Seq | Type | Description |
| --- | --- | --- |
| 1 | DEF 14A | DEF 14A |
| 2 | EX-101.SCH | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT |
| 3 | EX-101.DEF | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT |
| 4 | EX-101.LAB | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT |
| 5 | EX-101.PRE | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT |
| 6 | GRAPHIC | clh-20260410\_g1.jpg |
| 7 | GRAPHIC | clh-20260410\_g10.jpg |
| 8 | GRAPHIC | clh-20260410\_g11.jpg |
| 9 | GRAPHIC | clh-20260410\_g12.jpg |
| 10 | GRAPHIC | clh-20260410\_g13.jpg |
| 11 | GRAPHIC | clh-20260410\_g14.jpg |
| 12 | GRAPHIC | clh-20260410\_g15.jpg |
| 13 | GRAPHIC | clh-20260410\_g16.jpg |
| 14 | GRAPHIC | clh-20260410\_g17.jpg |
| 15 | GRAPHIC | clh-20260410\_g18.jpg |

## Filing timeline for this registrant (55)

_Showing 12 of 55 filings._

| Filed | Form |
| --- | --- |
| [2026-04-10](https://search.stillhousedata.com/proxy/0000822818-26-000015) | DEFA14A |
| 2026-04-10 | DEF 14A |
| [2025-04-11](https://search.stillhousedata.com/proxy/0000822818-25-000013) | DEFA14A |
| [2025-04-11](https://search.stillhousedata.com/proxy/0000822818-25-000011) | DEF 14A |
| [2024-04-10](https://search.stillhousedata.com/proxy/0000822818-24-000016) | DEFA14A |
| [2024-04-10](https://search.stillhousedata.com/proxy/0000822818-24-000015) | DEF 14A |
| [2023-04-13](https://search.stillhousedata.com/proxy/0000822818-23-000026) | DEFA14A |
| [2023-04-13](https://search.stillhousedata.com/proxy/0000822818-23-000025) | DEF 14A |
| [2022-04-14](https://search.stillhousedata.com/proxy/0000822818-22-000019) | DEFA14A |
| [2022-04-14](https://search.stillhousedata.com/proxy/0000822818-22-000018) | DEF 14A |
| [2021-04-28](https://search.stillhousedata.com/proxy/0000822818-21-000011) | DEFA14A |
| [2021-04-23](https://search.stillhousedata.com/proxy/0000822818-21-000009) | DEF 14A |

## More

- [CIK 822818 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=822818&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/proxy/0000822818-26-000013.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.