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Filing Detail
Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
SEC Accession No. 0001567619-19-003703
Filing Date
2019-02-13
Accepted
2019-02-13 15:38:45
Documents
1
Group Members
NEUBERGER BERMAN INVESTMENT ADVISERS LLC

Document Format Files

Seq Description Document Type Size
1 NONE doc1.htm SC 13G/A 81149
  Complete submission text file 0001567619-19-003703.txt   82654
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.: 19596809
SIC: 7371 Services-Computer Programming Services
Office of Technology

Mailing Address 1290 AVENUE OF THE AMERICAS NEW YORK NY 10104
Business Address 1290 AVENUE OF THE AMERICAS NEW YORK NY 10104 212-476-9000
Neuberger Berman Group LLC (Filed by) CIK: 0001465109 (see all company filings)

IRS No.: 611591182 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G/A