CLH - CIK 0000822818
CLEAN HARBORS INC has filed 2,636 documents with the SEC between 1994 and 2026. The most frequent type is insider trade (1,741 filings), alongside the regular cadence of annual reports, quarterly reports, and event disclosures every public company must make. Use the filters to focus on one filing type, or flip the sort to trace the company's history from its earliest paperwork.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.
| Filing | Type | Filed | Period covered |
|---|---|---|---|
| Passive ownership stake (update) | SC 13G/A | 1998-02-10 | - |
| Passive ownership stake | SC 13G | 1998-02-10 | - |
| Quarterly report | 10-Q | 1997-11-14 | 1997-09-30 |
| Quarterly report | 10-Q | 1997-08-14 | 1997-06-30 |
| Quarterly report | 10-Q | 1997-05-14 | 1997-03-31 |
| Proxy statement | DEF 14A | 1997-04-30 | 1997-06-26 |
| Annual report | 10-K | 1997-03-27 | 1996-12-31 |
| Passive ownership stake (update) | SC 13G/A | 1997-02-13 | - |
| Passive ownership stake | SC 13G | 1997-02-12 | - |
| Quarterly report | 10-Q | 1996-11-13 | 1996-09-30 |
| Activist ownership stake | SC 13D | 1996-10-09 | - |
| Quarterly report | 10-Q | 1996-08-12 | 1996-06-30 |
| Quarterly report | 10-Q | 1996-05-13 | 1996-03-31 |
| Proxy statement | DEF 14A | 1996-04-30 | 1996-06-17 |
| Annual report (amended) | 10-K/A | 1996-04-17 | 1995-12-31 |
| Annual report | 10-K | 1996-03-28 | 1995-12-31 |
| Passive ownership stake (update) | SC 13G/A | 1996-02-15 | - |
| Quarterly report | 10-Q | 1995-11-14 | 1995-09-30 |
| Quarterly report (amended) | 10-Q/A | 1995-08-28 | 1995-06-30 |
| Quarterly report | 10-Q | 1995-08-14 | 1995-06-30 |
| Employee stock plan | S-8 | 1995-06-13 | - |
| Quarterly report | 10-Q | 1995-05-15 | 1995-03-31 |
| Proxy statement | DEF 14A | 1995-04-04 | 1995-05-12 |
| Quarterly report (amended) | 10-Q/A | 1995-03-21 | 1994-09-30 |
| Annual report | 10-K | 1995-02-23 | 1994-12-31 |
| 15-15D | - | 1995-02-14 | - |
| Passive ownership stake (update) | SC 13G/A | 1995-02-14 | - |
| Quarterly report | 10-Q | 1994-11-14 | 1994-09-30 |
| Quarterly report | 10-Q | 1994-08-15 | 1994-06-30 |
| S-2/A | - | 1994-07-29 | - |
| S-2/A | - | 1994-07-26 | - |
| S-2/A | - | 1994-06-28 | - |
| S-2 | - | 1994-06-17 | - |
| Quarterly report | 10-Q | 1994-05-04 | 1994-03-31 |
| Proxy statement | DEF 14A | 1994-04-08 | 1994-05-19 |
| Passive ownership stake | SC 13G | 1994-02-25 | - |