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Filing Detail
Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
SEC Accession No. 0001037389-20-000104
Filing Date
2020-02-13
Accepted
2020-02-12 17:53:21
Documents
1

Document Format Files

Seq Description Document Type Size
1 azpn-13g_20191231.txt SC 13G/A 11789
  Complete submission text file 0001037389-20-000104.txt   13315
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.: 20605813
SIC: 7371 Services-Computer Programming Services

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/A