# CLEAN HARBORS INC — DEF 14A

CLEAN HARBORS INC of NORWELL, MA filed a DEF 14A with the SEC on 1995-04-04. Industry: Hazardous Waste Management.

## Filing

- Filed: 1995-04-04
- Form: DEF 14A
- Accession: 0000950109-95-001139
- Registrant: CLEAN HARBORS INC
- CIK: 0000822818
- Industry (SIC): Hazardous Waste Management (4955)
- State of incorporation: MA
- Location: NORWELL, MA

## 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](https://search.stillhousedata.com/proxy/0000822818-26-000013) | 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/0000950109-95-001139.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.