| Quarterly report | 10-Q | 1999-09-03 | 1999-07-31 |
| Employee plan annual report | 11-K | 1999-07-12 | 1998-12-31 |
| 424B3 | - | 1999-07-09 | - |
| Quarterly report | 10-Q | 1999-06-10 | 1999-05-01 |
| 8-A12G | - | 1999-05-28 | - |
| Proxy statement | DEF 14A | 1999-05-07 | 1999-06-08 |
| 10-K405 | - | 1999-04-21 | 1999-01-30 |
| Activist ownership stake | SC 13D | 1999-04-19 | - |
| Activist ownership stake | SC 13D | 1999-04-19 | - |
| Activist ownership stake | SC 13D | 1999-04-19 | - |
| Activist ownership stake | SC 13D | 1999-04-19 | - |
| Activist ownership stake | SC 13D | 1999-04-19 | - |
| S-8 POS | - | 1999-04-08 | - |
| S-8 POS | - | 1999-04-08 | - |
| S-8 POS | - | 1999-04-08 | - |
| POS AM | - | 1999-04-08 | - |
| S-8 POS | - | 1999-04-08 | - |
| Major company event | 8-K | 1999-04-08 | 1999-04-07 |
| S-8 POS | - | 1999-04-08 | - |
| 424B3 | - | 1999-03-16 | - |
| 424B3 | - | 1999-02-26 | - |
| Passive ownership stake (update) | SC 13G/A | 1999-02-12 | - |
| Passive ownership stake (update) | SC 13G/A | 1999-02-12 | - |
| Passive ownership stake (update) | SC 13G/A | 1999-02-12 | - |
| 424B3 | - | 1999-02-08 | - |
| Quarterly report (amended) | 10-Q/A | 1999-02-01 | 1998-10-31 |
| 424B3 | - | 1999-02-01 | - |
| 424B3 | - | 1999-01-26 | - |
| Major company event (amended) | 8-K/A | 1999-01-12 | 1998-11-02 |
| 424B1 | - | 1998-12-23 | - |
| Securities registration | S-3 | 1998-12-14 | - |
| Activist ownership stake (update) | SC 13D/A | 1998-12-14 | - |
| Quarterly report | 10-Q | 1998-11-24 | 1998-10-31 |
| Major company event | 8-K | 1998-11-09 | 1998-11-02 |
| S-8 POS | - | 1998-11-06 | - |
| S-8 POS | - | 1998-11-06 | - |
| S-8 POS | - | 1998-11-06 | - |
| S-8 POS | - | 1998-11-06 | - |
| S-8 POS | - | 1998-11-06 | - |
| DEFS14A | - | 1998-09-28 | 1998-10-22 |
| PRES14A | - | 1998-09-18 | 1998-10-23 |
| Quarterly report | 10-Q | 1998-09-15 | 1998-08-01 |
| Employee plan annual report | 11-K | 1998-06-29 | 1997-12-31 |
| Quarterly report (amended) | 10-Q/A | 1998-06-15 | 1998-05-02 |
| Quarterly report | 10-Q | 1998-06-12 | 1998-05-02 |
| Proxy statement | DEF 14A | 1998-05-05 | 1998-06-03 |
| Annual report | 10-K | 1998-04-24 | 1998-01-31 |
| Activist ownership stake (update) | SC 13D/A | 1998-04-24 | - |
| Passive ownership stake (update) | SC 13G/A | 1998-04-15 | - |
| Passive ownership stake (update) | SC 13G/A | 1998-04-15 | - |
