| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2008-04-28 | GENDELL JEFFREY L ET AL | Koppers Holdings Inc. | 425,148 | 2.0% | EDGAR |
| SC 13G/A | 2008-02-14 | Saratoga Partners III, L.P. | Koppers Holdings Inc. | 1,043,830 | 5.0% | EDGAR |
| SC 13G/A | 2008-02-14 | LORD ABBETT & CO LLC | Koppers Holdings Inc. | 469,833 | 2.3% | EDGAR |
| SC 13G | 2008-02-14 | KEELEY ASSET MANAGEMENT CORP | Koppers Holdings Inc. | 1,433,730 | 6.9% | EDGAR |
| SC 13G/A | 2008-02-13 | CAXTON ASSOCIATES LLC | Koppers Holdings Inc. | 80 | 0.0% | EDGAR |
| SC 13G | 2008-02-13 | PRICE T ROWE ASSOCIATES INC /MD/ | Koppers Holdings Inc. | 1,322,800 | 6.3% | EDGAR |
| SC 13G/A | 2008-01-25 | GENDELL JEFFREY L ET AL | Koppers Holdings Inc. | 1,195,948 | 5.7% | EDGAR |
| SC 13G | 2007-04-10 | LORD ABBETT & CO LLC | Koppers Holdings Inc. | 1,165,992 | 5.6% | EDGAR |
| SC 13G/A | 2007-03-13 | Saratoga Partners III, L.P. | Koppers Holdings Inc. | 2,087,661 | 10.1% | EDGAR |
| SC 13G/A | 2007-02-14 | CAXTON ASSOCIATES LLC | Koppers Holdings Inc. | 422,413 | 2.0% | EDGAR |
| SC 13G/A | 2007-01-17 | GENDELL JEFFREY L ET AL | Koppers Holdings Inc. | 131,600 | 0.6% | EDGAR |
| SC 13G/A | 2006-07-31 | CAXTON ASSOCIATES LLC | Koppers Holdings Inc. | 434,199 | 2.1% | EDGAR |
| SC 13G | 2006-02-23 | CAXTON ASSOCIATES LLC | Koppers Holdings Inc. | 174,015 | 0.8% | EDGAR |
| SC 13G | 2006-02-15 | Saratoga Partners III, L.P. | Koppers Holdings Inc. | 5,141,061 | 24.8% | EDGAR |
| SC 13G | 2006-02-13 | GENDELL JEFFREY L ET AL | Koppers Holdings Inc. | 1,292,000 | 6.2% | EDGAR |