| Filed On | Filing |
|---|---|
| 19 Feb 2009 | 10-Q |
| 15 Mar 2007 | 10-Q/A |
| 14 Jun 2006 | AMENDMENT TO QUARTERLY REPORT PURSUANT TO SECTIONS 13 OR 15(D) |
| 06 Sep 2002 | ASPEN TECHNOLOGY, INC. |
| 21 Feb 2001 | ASPEN TECHNOLOGY, INC. |
| 20 Nov 1998 | ASPEN TECHNOLOGY, INC. |
| 17 Jun 1998 | ASPEN TECHNOLOGY, INC. |
| 12 Jun 1998 | ASPEN TECHNOLOGY, INC. |
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