| Filed On | Filing |
|---|---|
| 03 Jul 2002 | ASPEN TECHNOLOGY INC. |
| 03 Jul 2002 | ASPEN TECHNOLOGY INC. |
| 25 Jul 2001 | ASPEN TECHNOLOGY, INC. |
| 23 Dec 1998 | AMENDMENT NO. 1 TO FORM S-3 |
| 08 Dec 1998 | AMENDMENT NO. 1 TO FORM S-3 |
| 09 Oct 1998 | ASPEN TECHNOLOGY, INC. |
| 06 Jun 1996 | AMENDMENT NO. 1 |
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