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Filing Detail
Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
SEC Accession No. 0001193125-21-041439
Filing Date
2021-02-12
Accepted
2021-02-12 16:03:56
Documents
4
Group Members
IVY INVESTMENT MANAGEMENT CO

Document Format Files

Seq Description Document Type Size
1 ASPEN TECHNOLOGY, INC. d122146dsc13ga.htm SC 13G/A 51369
2 JOINT FILING AGREEMENT d122146dex991.htm EX-99.1 4949
3 IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY d122146dex992.htm EX-99.2 908
4 POWER OF ATTORNEY d122146dex993.htm EX-99.3 13650
  Complete submission text file 0001193125-21-041439.txt   72456
Mailing Address 20 CROSBY DRIVE BEDFORD MA 01730
Business Address 20 CROSBY DRIVE BEDFORD MA 01730 781-221-4302
ASPEN TECHNOLOGY INC /DE/ (Subject) CIK: 0000929940 (see all company filings)

IRS No.: 042739697 | State of Incorp.: DE | Fiscal Year End: 0630
Type: SC 13G/A | Act: 34 | File No.: 005-44607 | Film No.: 21627109
SIC: 7371 Services-Computer Programming Services

Mailing Address PO BOX 29217 SHAWNEE MISSION KS 66201-9217
Business Address 6300 LAMAR AVE OVERLAND PARK KS 66202-4200 9132362000
WADDELL & REED FINANCIAL INC (Filed by) CIK: 0001052100 (see all company filings)

IRS No.: 510261715 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G/A
SIC: 6211 Security Brokers, Dealers & Flotation Companies