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| 01/20/2006 | 4 | Statement of changes in beneficial ownership of securities | Keddie Roland P |    |
| 01/20/2006 | 4 | Statement of changes in beneficial ownership of securities | Rockov Kolja | |
| 01/20/2006 | 4 | Statement of changes in beneficial ownership of securities | Quantum Energy Management II, LLC | |
| 01/20/2006 | 4 | Statement of changes in beneficial ownership of securities | Robinson Donald T | |
| 01/20/2006 | 4 | Statement of changes in beneficial ownership of securities | Tipton Curtis L | |
| 01/19/2006 | 8-K | Report of unscheduled material events or corporate changes. | |  |
| 01/19/2006 | S-8 | Securities offered to employees pursuant to employee benefit plans | | |
| 01/13/2006 | 424B4 | Form of prospectus disclosing information facts events covered in both forms 424B1 424B3 | | |
| 01/12/2006 | 3 | Initial statement of beneficial ownership of securities | Tipton Curtis L | |
| 01/12/2006 | 3 | Initial statement of beneficial ownership of securities | Jacobs Terrence S | |
| 01/12/2006 | 3 | Initial statement of beneficial ownership of securities | SWOVELAND JEFFREY C | |
| 01/12/2006 | 3 | Initial statement of beneficial ownership of securities | ALCORN GEORGE A | |
| 01/12/2006 | 8-A12G | Registration of certain classes of securities 12(g) of the Securities Exchange Act | | |
| 01/12/2006 | 3 | Initial statement of beneficial ownership of securities | Quantum Energy Management II, LLC | |
| 01/12/2006 | 3 | Initial statement of beneficial ownership of securities | Merriam Gerald W | |
| 01/12/2006 | 3 | Initial statement of beneficial ownership of securities | Linn Michael C | |
| 01/12/2006 | 3 | Initial statement of beneficial ownership of securities | Keddie Roland P | |
| 01/12/2006 | 3 | Initial statement of beneficial ownership of securities | Robinson Donald T | |
| 01/12/2006 | 3 | Initial statement of beneficial ownership of securities | Rockov Kolja | |
| 01/12/2006 | 3 | Initial statement of beneficial ownership of securities | NEUGEBAUER TOBY R | |
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