| Date | Event |
| 22-Oct-09 | HERITAGE-CRYSTAL CLEAN, INC. Files SEC form 8-K, Regulation FD Disclosure |
| 21-Oct-09 | HERITAGE-CRYSTAL CLEAN, INC. Files SEC form 8-K, Results of Operations and Financial Condition |
| 31-Jul-09 | HERITAGE-CRYSTAL CLEAN, INC. Files SEC form 10-Q, Quarterly Report |
| 29-Jul-09 | HERITAGE-CRYSTAL CLEAN, INC. Files SEC form 8-K, Results of Operations and Financial Condition |
| 15-Jul-09 | Price hit new 52-week high ($13.10) |
| 14-Jul-09 | Price hit new 52-week high ($13.00) |
| 8-May-09 | HERITAGE-CRYSTAL CLEAN, INC. Files SEC form 10-Q, Quarterly Report |
| 5-May-09 | HERITAGE-CRYSTAL CLEAN, INC. Files SEC form 8-K, Results of Operations and Financial Condition |
| 30-Mar-09 | HERITAGE-CRYSTAL CLEAN, INC. Files SEC form 10-K, Annual Report |
| 26-Mar-09 | HERITAGE-CRYSTAL CLEAN, INC. Files SEC form 8-K, Results of Operations and Financial Condition |
| 20-Mar-09 | Price hit new 52-week low ($6.51) |
| 19-Mar-09 | Price hit new 52-week low ($7.04) |
| 18-Mar-09 | Price hit new 52-week low ($7.15) |
| 29-Oct-08 | HERITAGE-CRYSTAL CLEAN, INC. Files SEC form 8-K, Changes in Registrant's Certifying Accountant, Financial Statements |