| New insider ownership | 3 | 2000-07-07 | 2000-06-28 |
| Passive ownership stake | SC 13G | 2000-07-05 | - |
| Passive ownership stake | SC 13G | 2000-07-05 | - |
| POS AM | - | 2000-06-27 | - |
| Employee plan annual report | 11-K | 2000-06-14 | 1999-12-31 |
| 424B3 | - | 2000-05-25 | - |
| S-4/A | - | 2000-05-23 | - |
| Quarterly report | 10-Q | 2000-05-12 | 2000-03-31 |
| S-4 | - | 2000-05-10 | - |
| Passive ownership stake | SC 13G | 2000-04-14 | - |
| Proxy statement | DEF 14A | 2000-04-11 | 2000-05-17 |
| Passive ownership stake (update) | SC 13G/A | 2000-04-10 | - |
| Annual report | 10-K | 2000-03-16 | 1999-12-31 |
| 425 | - | 2000-03-16 | - |
| Activist ownership stake (update) | SC 13D/A | 2000-03-14 | - |
| Passive ownership stake (update) | SC 13G/A | 2000-03-01 | - |
| Passive ownership stake | SC 13G | 2000-02-17 | - |
| 424B3 | - | 2000-01-07 | - |
| S-4/A | - | 2000-01-04 | - |
| S-4/A | - | 1999-12-29 | - |
| S-4 | - | 1999-11-24 | - |
| Quarterly report | 10-Q | 1999-11-15 | 1999-09-30 |
| Securities registration | S-3 | 1999-08-24 | - |
| Major company event | 8-K | 1999-08-24 | 1999-08-24 |
| Quarterly report | 10-Q | 1999-08-13 | 1999-06-30 |
| Employee plan annual report | 11-K | 1999-06-25 | 1998-12-31 |
| Quarterly report | 10-Q | 1999-05-14 | 1999-03-31 |
| Proxy materials | DEFA14A | 1999-05-12 | - |
| Proxy statement | DEF 14A | 1999-04-23 | 1999-05-19 |
| Annual report | 10-K | 1999-03-30 | 1998-12-31 |
| 424B3 | - | 1999-03-17 | - |
| 424B1 | - | 1999-03-03 | - |
| Activist ownership stake (update) | SC 13D/A | 1999-02-18 | - |
| Securities registration | S-3 | 1999-02-17 | - |
| Passive ownership stake (update) | SC 13G/A | 1999-02-16 | - |
| Passive ownership stake | SC 13G | 1999-02-09 | - |
| Passive ownership stake | SC 13G | 1999-01-21 | - |
| Activist ownership stake (update) | SC 13D/A | 1999-01-13 | - |
| 424B1 | - | 1998-12-24 | - |
| POS AM | - | 1998-12-22 | - |
| POS AM | - | 1998-12-08 | - |
| Quarterly report | 10-Q | 1998-11-16 | 1998-09-30 |
| POS AM | - | 1998-11-04 | - |
| Activist ownership stake (update) | SC 13D/A | 1998-10-01 | - |
| Activist ownership stake | SC 13D | 1998-09-29 | - |
| Activist ownership stake | SC 13D | 1998-09-28 | - |
| S-4/A | - | 1998-09-23 | - |
| S-4/A | - | 1998-08-25 | - |
| Major company event (amended) | 8-K/A | 1998-08-17 | 1998-06-02 |
| Quarterly report | 10-Q | 1998-08-14 | 1998-06-30 |
