| Date Filed | Type | Description |
| 02/14/2023 |
SC 13G/A
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC reports a 4.7% stake in ASPEN TECHNOLOGY INC |
| 06/09/2022 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 05/26/2022 |
15-12B
| Form 15-12B - Securities registration termination [Section 12(b)]: |
| 05/18/2022 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments: |
| 05/18/2022 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments: |
| 05/18/2022 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments: |
| 05/16/2022 |
8-K
| Quarterly results |
| 05/16/2022 |
25-NSE
| Form 25-NSE - Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities: |
| 05/09/2022 |
SC 13G
| Form SC 13G - Statement of acquisition of beneficial ownership by individuals: |
| 05/04/2022 |
425
| Form 425 - Prospectuses and communications, business combinations: |
| 05/04/2022 |
8-K
| Quarterly results |
| 05/03/2022 |
425
| Form 425 - Prospectuses and communications, business combinations: |
| 05/03/2022 |
8-K
| Quarterly results |
| 05/02/2022 |
425
| Form 425 - Prospectuses and communications, business combinations: |
| 05/02/2022 |
8-K
| Quarterly results |
| 04/28/2022 |
425
| Form 425 - Prospectuses and communications, business combinations: |
| 04/27/2022 |
8-K
| Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements... |
| 04/27/2022 |
8-K
| Quarterly results |
| 04/27/2022 |
10-Q
| Quarterly Report for the period ended March 31, 2022 |
| 04/22/2022 |
8-K
| Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements... |
| 04/18/2022 |
DEFM14A
| Form DEFM14A - Definitive proxy statement relating to merger or acquisition: |
| 04/06/2022 |
425
| Form 425 - Prospectuses and communications, business combinations: |
| 03/22/2022 |
425
| Form 425 - Prospectuses and communications, business combinations: |
| 03/14/2022 |
8-K
| Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements... |
| 03/01/2022 |
425
| Form 425 - Prospectuses and communications, business combinations: |
| 02/14/2022 |
SC 13G/A
| BlueSpruce Investments, LP reports a 0% stake in ASPEN TECHNOLOGY INC |
| 02/11/2022 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 02/09/2022 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 02/02/2022 |
425
| Form 425 - Prospectuses and communications, business combinations: |
| 02/01/2022 |
SC 13G/A
| BlackRock Inc. reports a 9.3% stake in ASPEN TECHNOLOGY INC |
| 01/27/2022 |
425
| Form 425 - Prospectuses and communications, business combinations: |
| 01/26/2022 |
8-K
| Quarterly results |
| 01/26/2022 |
10-Q
| Quarterly Report for the period ended December 31, 2021 |
| 01/18/2022 |
425
| Form 425 - Prospectuses and communications, business combinations: |
|