Mailing Address 20 CROSBY DRIVE BEDFORD MA 01730
Business Address 20 CROSBY DRIVE BEDFORD MA 01730 781-221-1939
Aspen Technology, Inc. CIK#: 0001897982 (see all company filings)

SIC: 7371 - SERVICES-COMPUTER PROGRAMMING SERVICES
State location: MA | State of Inc.: DE | Fiscal Year End: 0630
formerly: Emersub CX, Inc. (filings through 2022-05-16)
(CF Office: 06 Technology)
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Items 1 - 40  0001897982 Filings RSS Feed
Filings Format Description Filing Date File/Film Number
15-12G  Documents Securities registration termination [Section 12(g)]
Acc-no: 0001140361-25-009966 (34 Act)  Size: 14 KB
2025-03-24 001-41400
25762331
8-K  Documents   Interactive Data Current report, item 1.02
Acc-no: 0001140361-25-009036 (34 Act)  Size: 161 KB
2025-03-17 001-41400
25744514
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009358 Size: 14 KB
2025-03-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009356 Size: 10 KB
2025-03-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009354 Size: 14 KB
2025-03-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009352 Size: 7 KB
2025-03-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009351 Size: 28 KB
2025-03-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009350 Size: 4 KB
2025-03-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009349 Size: 16 KB
2025-03-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009348 Size: 7 KB
2025-03-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009347 Size: 7 KB
2025-03-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009346 Size: 12 KB
2025-03-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009345 Size: 7 KB
2025-03-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009343 Size: 7 KB
2025-03-13
S-8 POS  Documents Securities to be offered to employees in employee benefit plans, post-effective amendments
Acc-no: 0001140361-25-008433 (33 Act)  Size: 18 KB
2025-03-12 333-265145
25731816
25-NSE  Documents Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities
Acc-no: 0001354457-25-000196 (34 Act)  Size: 3 KB
2025-03-12 001-41400
25730545
SC 13E3/A  Documents [Amend] Going private transaction by certain issuers
Acc-no: 0001140361-25-008274 (34 Act)  Size: 176 KB
2025-03-12 005-93677
25730480
SC 14D9/A  Documents [Amend] Solicitation, recommendation statements
Acc-no: 0001140361-25-008264 (34 Act)  Size: 20 KB
2025-03-12 005-93677
25730317
8-K  Documents   Interactive Data Current report, items 1.02, 2.01, 3.01, 3.03, 5.01, 5.02, 5.03, and 9.01
Acc-no: 0001140361-25-008260 (34 Act)  Size: 278 KB
2025-03-12 001-41400
25730247
SCHEDULE 13D/A  Documents [Amend] General Statement of Acquisition of Beneficial Ownership
Acc-no: 0001140361-25-008253 (34 Act)  Size: 12 KB
2025-03-12 005-93677
25730147
SC TO-T/A  Documents [Amend] Tender offer statement by Third Party
Acc-no: 0001140361-25-008250 (34 Act)  Size: 41 KB
2025-03-12 005-93677
25730136
SC 13E3/A  Documents [Amend] Going private transaction by certain issuers
Acc-no: 0001140361-25-008250 (34 Act)  Size: 41 KB
2025-03-12 005-93677
25730137
SC 13E3/A  Documents [Amend] Going private transaction by certain issuers
Acc-no: 0001140361-25-007773 (34 Act)  Size: 167 KB
2025-03-10 005-93677
25722310
SC 14D9/A  Documents [Amend] Solicitation, recommendation statements
Acc-no: 0001140361-25-007768 (34 Act)  Size: 34 KB
2025-03-10 005-93677
25722182
SC TO-T/A  Documents [Amend] Tender offer statement by Third Party
Acc-no: 0001140361-25-007767 (34 Act)  Size: 82 KB
2025-03-10 005-93677
25722158
SC 13E3/A  Documents [Amend] Going private transaction by certain issuers
Acc-no: 0001140361-25-007767 (34 Act)  Size: 82 KB
2025-03-10 005-93677
25722159
8-K  Documents   Interactive Data Current report, items 1.01 and 9.01
Acc-no: 0001140361-25-007765 (34 Act)  Size: 191 KB
2025-03-10 001-41400
25722141
SCHEDULE 13D/A  Documents [Amend] General Statement of Acquisition of Beneficial Ownership
Acc-no: 0001140361-25-007218 (34 Act)  Size: 10 KB
2025-03-05 005-93677
25711885
CT ORDER  Documents Confidential treatment order
Acc-no: 9999999997-25-000671 (34 Act)  Size: 79 KB
2025-03-05 005-93677
25709349
SC 13E3/A  Documents [Amend] Going private transaction by certain issuers
Acc-no: 0001140361-25-006792 (34 Act)  Size: 58 KB
2025-03-03 005-93677
25699514
SC TO-T/A  Documents [Amend] Tender offer statement by Third Party
Acc-no: 0001140361-25-006792 (34 Act)  Size: 58 KB
2025-03-03 005-93677
25699513
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-007510 Size: 5 KB
2025-03-03
SC 13E3/A  Documents [Amend] Going private transaction by certain issuers
Acc-no: 0001140361-25-006433 (34 Act)  Size: 159 KB
2025-02-28 005-93677
25683112
SC 14D9/A  Documents [Amend] Solicitation, recommendation statements
Acc-no: 0001140361-25-006430 (34 Act)  Size: 271 KB
2025-02-28 005-93677
25682906
SC TO-T/A  Documents [Amend] Tender offer statement by Third Party
Acc-no: 0001140361-25-006426 (34 Act)  Size: 36 KB
2025-02-28 005-93677
25682822
SC 13E3/A  Documents [Amend] Going private transaction by certain issuers
Acc-no: 0001140361-25-006426 (34 Act)  Size: 36 KB
2025-02-28 005-93677
25682823
SC TO-T/A  Documents [Amend] Tender offer statement by Third Party
Acc-no: 0001140361-25-006355 (34 Act)  Size: 38 KB
2025-02-28 005-93677
25682381
SC 13E3/A  Documents [Amend] Going private transaction by certain issuers
Acc-no: 0001140361-25-006355 (34 Act)  Size: 38 KB
2025-02-28 005-93677
25682382
UPLOAD  Documents [Cover]SEC-generated letter
Acc-no: 0000000000-25-002193 Size: 44 KB
2025-02-26 005-93677
SC 13E3/A  Documents [Amend] Going private transaction by certain issuers
Acc-no: 0001140361-25-005856 (34 Act)  Size: 2 MB
2025-02-25 005-93677
25663073