| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13D/A | 2002-09-20 | OAK HILL SECURITIES FUND LP | CLEAN HARBORS INC | 330,000 | 2.6% | EDGAR |
| SC 13D | 2002-09-17 | FEINBERG STEPHEN | CLEAN HARBORS INC | 1,595,238 | 11.6% | EDGAR |
| SC 13G | 2002-05-01 | HANCOCK JOHN FINANCIAL SERVICES INC | CLEAN HARBORS INC | 954,812 | 7.7% | EDGAR |
| SC 13G/A | 2002-02-12 | DIMENSIONAL FUND ADVISORS INC | CLEAN HARBORS INC | 765,200 | 6.7% | EDGAR |
| SC 13G | 2001-02-02 | DIMENSIONAL FUND ADVISORS INC | CLEAN HARBORS INC | 737,200 | 6.7% | EDGAR |
| SC 13D/A | 2000-08-21 | - | - | - | - | EDGAR |
| SC 13D | 2000-06-26 | - | - | - | - | EDGAR |
| SC 13G | 2000-02-03 | DIMENSIONAL FUND ADVISORS INC | CLEAN HARBORS INC | 628,200 | 5.8% | EDGAR |
| SC 13G | 2000-02-03 | DIMENSIONAL FUND ADVISORS INC | CLEAN HARBORS INC | 628,200 | 5.8% | EDGAR |
| SC 13G | 2000-02-03 | DIMENSIONAL FUND ADVISORS INC | CLEAN HARBORS INC | 628,200 | 5.8% | EDGAR |