| SC 13G | 2004-02-17 | FMR CORP | ASPEN TECHNOLOGY INC /DE/ | 2,451,566 | 6.1% | EDGAR |
| SC 13G/A | 2004-02-12 | CITADEL L P | ASPEN TECHNOLOGY INC /DE/ | 0 | 0.0% | EDGAR |
| SC 13G/A | 2004-02-10 | TCW GROUP INC | ASPEN TECHNOLOGY INC /DE/ | 4,726,056 | 11.8% | EDGAR |
| SC 13G/A | 2004-02-09 | FRANKLIN RESOURCES INC | ASPEN TECHNOLOGY INC /DE/ | 3,477,017 | 8.7% | EDGAR |
| SC 13G/A | 2004-02-09 | TCW GROUP INC | ASPEN TECHNOLOGY INC /DE/ | 4,726,056 | 11.8% | EDGAR |
| SC 13G/A | 2004-01-06 | RUTABAGA CAPITAL MANAGEMENT LLC/MA | ASPEN TECHNOLOGY INC /DE/ | 0 | 0.0% | EDGAR |
| SC 13D | 2003-08-22 | ADVENT INTERNATIONAL CORP/MA | ASPEN TECHNOLOGY INC /DE/ | 36,036,006 | 47.5% | EDGAR |
| SC 13D/A | 2003-08-15 | FRANKLIN RESOURCES INC | ASPEN TECHNOLOGY INC /DE/ | 3,907,612 | 10.0% | EDGAR |
| SC 13G/A | 2003-08-15 | FRANKLIN RESOURCES INC | ASPEN TECHNOLOGY INC /DE/ | 4,629,033 | 11.8% | EDGAR |
| SC 13D/A | 2003-08-07 | FRANKLIN RESOURCES INC | ASPEN TECHNOLOGY INC /DE/ | 3,907,612 | 10.0% | EDGAR |
| SC 13D | 2003-07-31 | FRANKLIN RESOURCES INC | ASPEN TECHNOLOGY INC /DE/ | 3,907,612 | 10.0% | EDGAR |
| SC 13G | 2003-02-20 | RUTABAGA CAPITAL MANAGEMENT LLC/MA | ASPEN TECHNOLOGY INC /DE/ | 2,567,650 | 6.7% | EDGAR |
| SC 13G/A | 2003-02-14 | CITADEL L P | ASPEN TECHNOLOGY INC /DE/ | 2,299,451 | - | EDGAR |
| SC 13G/A | 2003-02-13 | CAPITAL RESEARCH & MANAGEMENT CO | ASPEN TECHNOLOGY INC /DE/ | - | 0.0% | EDGAR |
| SC 13G/A | 2003-02-13 | MASSACHUSETTS CAPITAL RESOURCE CO | ASPEN TECHNOLOGY INC /DE/ | 188,390 | 0.5% | EDGAR |
| SC 13G/A | 2003-02-11 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | ASPEN TECHNOLOGY INC /DE/ | 0 | 0.0% | EDGAR |
| SC 13G/A | 2003-02-05 | TCW GROUP INC | ASPEN TECHNOLOGY INC /DE/ | 4,894,398 | 12.8% | EDGAR |
| SC 13G/A | 2003-02-04 | CAVALLO CAPITAL CORP | ASPEN TECHNOLOGY INC /DE/ | 1,916,877 | 5.0% | EDGAR |
| SC 13G/A | 2003-01-30 | FRANKLIN RESOURCES INC | ASPEN TECHNOLOGY INC /DE/ | 4,456,820 | 11.6% | EDGAR |
| SC 13G | 2002-12-06 | CITADEL L P | ASPEN TECHNOLOGY INC /DE/ | 2,012,138 | - | EDGAR |