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Filing Detail
Form SC 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend]
SEC Accession No. 0000748054-98-000019
Filing Date
1998-02-04
Accepted
1998-02-04 00:00:00
Documents
1
SROs
NONE

Document Format Files

Seq Description Document Type Size
1 13G AMENDMENT SC 13G/A 7929
  Complete submission text file 0000748054-98-000019.txt   9926
Mailing Address
Business Address TWENTIETH CENTURY TOWER 4500 MAIN STREET KANSAS CITY MO 64111 8165315575
AMERICAN CENTURY COMPANIES INC (Filed by) CIK: 0000748054 (see all company filings)

IRS No.: 431320532 | State of Incorp.: MD | Fiscal Year End: 1231
SIC: 8741 Services-Management Services

Mailing Address TEN CANAL PK CAMBRIDGE MA 02141
Business Address TEN CANAL PARK CAMBRIDGE MA 02141 6175770100
ASPEN TECHNOLOGY INC /MA/ (Subject) CIK: 0000929940 (see all company filings)

IRS No.: 042739697 | State of Incorp.: MA | Fiscal Year End: 0630
Type: SC 13G/A | Act: 34 | File No.: 005-44607 | Film No.: 98521400
SIC: 7371 Services-Computer Programming Services