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Filing Detail
Form SC 13G - Statement of acquisition of beneficial ownership by individuals:
SEC Accession No. 0001037389-19-000010
Filing Date
2019-02-12
Accepted
2019-02-12 14:26:06
Documents
1

Document Format Files

Seq Description Document Type Size
1 azpn-13g_20181231.txt SC 13G 11757
  Complete submission text file 0001037389-19-000010.txt   13277
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 | Act: 34 | File No.: 005-44607 | Film No.: 19589934
SIC: 7371 Services-Computer Programming Services
Office of Technology

Mailing Address 800 THIRD AVE NEW YORK NY 10022
Business Address 800 THIRD AVE NEW YORK NY 10022 2124866780
RENAISSANCE TECHNOLOGIES LLC (Filed by) CIK: 0001037389 (see all company filings)

IRS No.: 260385758 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G