<SEC-DOCUMENT>0000052388-21-000069-index.html : 20210211 <SEC-HEADER>0000052388-21-000069.hdr.sgml : 20210211 <ACCEPTANCE-DATETIME>20210211112707 ACCESSION NUMBER: 0000052388-21-000069 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20210211 DATE AS OF CHANGE: 20210211 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: NORTHWESTERN CORP CENTRAL INDEX KEY: 0000073088 STANDARD INDUSTRIAL CLASSIFICATION: ELECTRIC & OTHER SERVICES COMBINED [4931] IRS NUMBER: 460172280 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-36015 FILM NUMBER: 21617680 BUSINESS ADDRESS: STREET 1: 3010 W 69TH STREET CITY: SIOUX FALLS STATE: SD ZIP: 57108 BUSINESS PHONE: 6059782908 MAIL ADDRESS: STREET 1: 3010 W 69TH STREET CITY: SIOUX FALLS STATE: SD ZIP: 57108 FORMER COMPANY: FORMER CONFORMED NAME: NORTHWESTERN PUBLIC SERVICE CO DATE OF NAME CHANGE: 19920703 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: AMERICAN CENTURY INVESTMENT MANAGEMENT INC CENTRAL INDEX KEY: 0000052388 STANDARD INDUSTRIAL CLASSIFICATION: UNKNOWN SIC - 0000 [0000] IRS NUMBER: 440640487 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 4500 MAIN STREET CITY: KANSAS CITY STATE: MO ZIP: 64111 BUSINESS PHONE: 816-531-5575 MAIL ADDRESS: STREET 1: 4500 MAIN STREET CITY: KANSAS CITY STATE: MO ZIP: 64111 FORMER COMPANY: FORMER CONFORMED NAME: INVESTORS RESEARCH CORP DATE OF NAME CHANGE: 19920929 </SEC-HEADER> <DOCUMENT> <TYPE>SC 13G <SEQUENCE>1 <FILENAME>northwesterncorp13g.htm <DESCRIPTION>SC 13G <TEXT> Document 1 - file: northwesterncorp13g.htm
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