| Major company event | 8-K | 2000-06-08 | 2000-06-07 |
| Passive ownership stake (update) | SC 13G/A | 2000-06-08 | - |
| Passive ownership stake (update) | SC 13G/A | 2000-05-10 | - |
| Quarterly report | 10-Q | 2000-05-05 | 2000-03-25 |
| Major company event | 8-K | 2000-03-31 | 2000-03-29 |
| Major company event | 8-K | 2000-03-20 | 2000-03-20 |
| Passive ownership stake (update) | SC 13G/A | 2000-02-15 | - |
| Quarterly report | 10-Q | 2000-02-07 | 1999-12-25 |
| Passive ownership stake | SC 13G | 2000-02-03 | - |
| Passive ownership stake (update) | SC 13G/A | 2000-01-25 | - |
| Proxy statement | DEF 14A | 2000-01-13 | 2000-02-14 |
| Annual report | 10-K | 1999-12-23 | 1999-09-25 |
| Passive ownership stake (update) | SC 13G/A | 1999-12-09 | - |
| Major company event | 8-K | 1999-10-07 | 1999-10-05 |
| Passive ownership stake (update) | SC 13G/A | 1999-09-09 | - |
| Quarterly report | 10-Q | 1999-08-10 | 1999-06-26 |
| Employee stock plan | S-8 | 1999-08-06 | - |
| Major company event | 8-K | 1999-07-13 | 1999-07-12 |
| Major company event | 8-K | 1999-07-12 | 1999-07-12 |
| Employee plan annual report | 11-K | 1999-06-29 | 1998-12-31 |
| Major company event | 8-K | 1999-06-15 | 1999-06-11 |
| Quarterly report | 10-Q | 1999-05-11 | 1999-03-27 |
| Passive ownership stake | SC 13G | 1999-03-19 | - |
| Passive ownership stake | SC 13G | 1999-02-11 | - |
| Quarterly report | 10-Q | 1999-02-09 | 1998-12-26 |
| Passive ownership stake (update) | SC 13G/A | 1999-02-04 | - |
| Proxy statement | DEF 14A | 1999-01-21 | 1999-02-22 |
| Annual report (amended) | 10-K/A | 1999-01-20 | 1998-09-26 |
| Passive ownership stake (update) | SC 13G/A | 1999-01-08 | - |
| Major company event | 8-K | 1999-01-07 | 1999-01-04 |
| Passive ownership stake (update) | SC 13G/A | 1999-01-07 | - |
| Annual report | 10-K | 1998-12-24 | 1998-09-26 |
| Major company event | 8-K | 1998-12-21 | 1998-12-18 |
| Passive ownership stake (update) | SC 13G/A | 1998-09-18 | - |
| Passive ownership stake (update) | SC 13G/A | 1998-09-09 | - |
| Major company event | 8-K | 1998-09-01 | 1998-08-31 |
| Quarterly report | 10-Q | 1998-08-11 | 1998-06-27 |
| 424B3 | - | 1998-08-04 | - |
| Major company event | 8-K | 1998-06-30 | 1998-06-26 |
| Employee plan annual report | 11-K | 1998-06-26 | 1997-12-31 |
| Quarterly report | 10-Q | 1998-05-12 | 1998-03-28 |
| Major company event (amended) | 8-K/A | 1998-05-06 | 1998-02-27 |
| Securities registration | S-3 | 1998-03-25 | - |
| S-4/A | - | 1998-03-20 | - |
| S-4/A | - | 1998-03-18 | - |
| 424B3 | - | 1998-03-17 | - |
| Major company event | 8-K | 1998-03-11 | 1998-02-27 |
| Activist ownership stake | SC 13D | 1998-03-10 | - |
| Major company event | 8-K | 1998-02-27 | 1998-02-17 |
| S-4 | - | 1998-02-17 | - |
