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Form SC 13G - Statement of Beneficial Ownership by Certain Investors:
SEC Accession No. 0001104659-06-005298
Filing Date
2006-02-01
Accepted
2006-02-01 15:01:04
Documents
4
Group Members
IVY INVESTMENT MANAGEMENT COMPANYWADDELL & REED FINANCIAL SERVICES, INC.WADDELL & REED INVESTMENT MANAGEMENT COMPANYWADDELL & REED, INC.

Document Format Files

Seq Description Document Type Size
1 BENEFICIAL OWNERSHIP OF 5% OR MORE a06-3730_17sc13g.htm SC 13G 141368
2 JOINT FILING AGREEMENT a06-3730_17ex1.htm EX-1 12501
3 IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY a06-3730_17ex2.htm EX-2 2281
4 POWER OF ATTORNEY a06-3730_17ex3.htm EX-3 43949
  Complete submission text file 0001104659-06-005298.txt   202244
Mailing Address TEN CANAL PARK CAMBRIDGE MA 02141
Business Address TEN CANAL PARK CAMBRIDGE MA 02141 6179491000
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 | Act: 34 | File No.: 005-44607 | Film No.: 06569341
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
SIC: 6211 Security Brokers, Dealers & Flotation Companies