<SEC-DOCUMENT>0001193125-15-229791-index.html : 20150622 <SEC-HEADER>0001193125-15-229791.hdr.sgml : 20150622 <ACCEPTANCE-DATETIME>20150622101300 ACCESSION NUMBER: 0001193125-15-229791 CONFORMED SUBMISSION TYPE: 424B5 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20150622 DATE AS OF CHANGE: 20150622 FILER: COMPANY DATA: COMPANY CONFORMED NAME: NORTHERN STATES POWER CO /WI/ CENTRAL INDEX KEY: 0000072909 STANDARD INDUSTRIAL CLASSIFICATION: ELECTRIC & OTHER SERVICES COMBINED [4931] IRS NUMBER: 390508315 STATE OF INCORPORATION: WI FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 424B5 SEC ACT: 1933 Act SEC FILE NUMBER: 333-203664-02 FILM NUMBER: 15943931 BUSINESS ADDRESS: STREET 1: 1414 W HAMILTON AVE CITY: EAU CLAIRE STATE: WI ZIP: 54702 BUSINESS PHONE: 7158392621 MAIL ADDRESS: STREET 1: P O BOX 8 CITY: EAU CLAIRE STATE: WI ZIP: 54702-008 </SEC-HEADER> <DOCUMENT> <TYPE>424B5 <SEQUENCE>1 <FILENAME>d944499d424b5.htm <DESCRIPTION>PRELIMINARY PROSPECTUS SUPPLEMENT <TEXT> Document 1 - file: d944499d424b5.htm
</DOCUMENT> </SEC-DOCUMENT>