| Filed On | Filing |
|---|---|
| 07 Nov 2003 | FORM 424(B)(3) |
| 09 Jul 2002 | ASPEN TECHNOLOGY, INC. |
| 09 Jul 2002 | ASPEN TECHNOLOGY, INC. |
| 17 Dec 2001 | FORM 424(B)(3) DATED 12/14/01 |
| 29 Nov 2000 | ASPEN TECHNOLOGY, INC. |
| 31 Oct 2000 | FORM 424B3 |
| 23 Mar 2000 | ASPEN TECHNOLOGY |
| 27 Jan 2000 | ASPEN TECHNOLOGY, INC. |
| 13 Jan 2000 | ASPEN TECHNOLOGY |
| 18 Nov 1999 | ASPEN TECHNOLOGY, INC. |
| 31 Aug 1999 | ASPEN TECHNOLOGY, INC. |
| 22 Jul 1999 | ASPEN TECHNOLOGY |
| 28 Jun 1999 | ASPEN TECHNOLOGY, INC. |
| 07 Jun 1999 | ASPEN TECHNOLOGY |
| 22 Apr 1999 | ASPEN TECHNOLOGY, INC. |
| 29 Mar 1999 | ASPEN TECHNOLOGY, INC. |
| 04 Feb 1999 | ASPEN TECHNOLOGY, INC. |
| 04 Feb 1999 | ASPEN TECHNOLOGY, INC. |
| 25 Jan 1999 | ASPEN TECHNOLOGY, INC. |
| 06 Jan 1999 | ASPEN TECHNOLOGY, INC. |
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