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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File Number: 001-41400

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Items 1 - 40  001-41400 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 (34 Act)  Size: 14 KB
2025-03-13 001-41400
25736320
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009356 (34 Act)  Size: 10 KB
2025-03-13 001-41400
25736292
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009354 (34 Act)  Size: 14 KB
2025-03-13 001-41400
25736249
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009352 (34 Act)  Size: 7 KB
2025-03-13 001-41400
25736231
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009351 (34 Act)  Size: 28 KB
2025-03-13 001-41400
25736210
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009350 (34 Act)  Size: 4 KB
2025-03-13 001-41400
25736199
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009349 (34 Act)  Size: 16 KB
2025-03-13 001-41400
25736176
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009348 (34 Act)  Size: 7 KB
2025-03-13 001-41400
25736157
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009347 (34 Act)  Size: 7 KB
2025-03-13 001-41400
25736144
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009346 (34 Act)  Size: 12 KB
2025-03-13 001-41400
25736126
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009345 (34 Act)  Size: 7 KB
2025-03-13 001-41400
25736097
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-009343 (34 Act)  Size: 7 KB
2025-03-13 001-41400
25736068
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
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
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
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-007510 (34 Act)  Size: 5 KB
2025-03-03 001-41400
25698325
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-004915 (34 Act)  Size: 7 KB
2025-02-14 001-41400
25629035
3  Documents Initial statement of beneficial ownership of securities
Acc-no: 0001127602-25-003952 (34 Act)  Size: 11 KB
2025-02-10 001-41400
25607077
3  Documents Initial statement of beneficial ownership of securities
Acc-no: 0001127602-25-003814 (34 Act)  Size: 8 KB
2025-02-10 001-41400
25605845
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001897982-25-000010 (34 Act)  Size: 6 MB
2025-02-04 001-41400
25588246
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0001897982-25-000009 (34 Act)  Size: 532 KB
2025-02-04 001-41400
25588159
8-K  Documents   Interactive Data Current report, items 1.01, 8.01, and 9.01
Acc-no: 0001140361-25-001939 (34 Act)  Size: 779 KB
2025-01-27 001-41400
25555761
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-000580 (34 Act)  Size: 4 KB
2025-01-06 001-41400
25509255
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-000579 (34 Act)  Size: 5 KB
2025-01-06 001-41400
25509250
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-25-000578 (34 Act)  Size: 4 KB
2025-01-06 001-41400
25509249
8-K  Documents   Interactive Data Current report, item 5.07
Acc-no: 0001897982-24-000086 (34 Act)  Size: 170 KB
2024-12-19 001-41400
241563281
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001897982-24-000075 (34 Act)  Size: 9 MB
2024-11-04 001-41400
241423699
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0001897982-24-000073 (34 Act)  Size: 489 KB
2024-11-04 001-41400
241423608
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-24-025988 (34 Act)  Size: 4 KB
2024-10-25 001-41400
241397279
ARS  Documents Annual Report to Security Holders
Acc-no: 0001897982-24-000066 (34 Act)  Size: 32 MB
2024-10-24 001-41400
241393011
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0001897982-24-000064 (34 Act)  Size: 1 MB
2024-10-24 001-41400
241392974
DEF 14A  Documents   Interactive Data Other definitive proxy statements
Acc-no: 0001897982-24-000062 (34 Act)  Size: 16 MB
2024-10-24 001-41400
241392960
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-24-024890 (34 Act)  Size: 4 KB
2024-10-02 001-41400
241347604
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-24-024886 (34 Act)  Size: 5 KB
2024-10-02 001-41400
241347589
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001127602-24-024882 (34 Act)  Size: 4 KB
2024-10-02 001-41400
241347569
8-K  Documents   Interactive Data Current report, items 5.02, 8.01, and 9.01
Acc-no: 0001897982-24-000057 (34 Act)  Size: 158 KB
2024-09-23 001-41400
241316536
144  Documents Report of proposed sale of securities
Acc-no: 0001959173-24-006609 (33 Act)  Size: 8 KB
2024-09-19 001-41400
241310339
144  Documents Report of proposed sale of securities
Acc-no: 0001959173-24-006586 (33 Act)  Size: 8 KB
2024-09-18 001-41400
241307346