<SEC-DOCUMENT>0000067716-15-000066-index.html : 20150528 <SEC-HEADER>0000067716-15-000066.hdr.sgml : 20150528 <ACCEPTANCE-DATETIME>20150528111336 ACCESSION NUMBER: 0000067716-15-000066 CONFORMED SUBMISSION TYPE: SD PUBLIC DOCUMENT COUNT: 2 <RULE> <RULE-NAME>13p-1 <ITEM> <ITEM-NUMBER>1.01 <ITEM-PERIOD>20141231 </ITEM> <ITEM> <ITEM-NUMBER>1.02 <ITEM-PERIOD>20141231 </ITEM> </RULE> FILED AS OF DATE: 20150528 DATE AS OF CHANGE: 20150528 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MDU RESOURCES GROUP INC CENTRAL INDEX KEY: 0000067716 STANDARD INDUSTRIAL CLASSIFICATION: MINING, QUARRYING OF NONMETALLIC MINERALS (NO FUELS) [1400] IRS NUMBER: 410423660 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SD SEC ACT: 1934 Act SEC FILE NUMBER: 001-03480 FILM NUMBER: 15894389 BUSINESS ADDRESS: STREET 1: 1200 WEST CENTURY AVENUE CITY: BISMARCK STATE: ND ZIP: 58503 BUSINESS PHONE: 701-530-1059 MAIL ADDRESS: STREET 1: 1200 WEST CENTURY AVENUE CITY: BISMARCK STATE: ND ZIP: 58503 FORMER COMPANY: FORMER CONFORMED NAME: MONTANA DAKOTA UTILITIES CO DATE OF NAME CHANGE: 19850429 </SEC-HEADER> <DOCUMENT> <TYPE>SD <SEQUENCE>1 <FILENAME>formsd2015.htm <DESCRIPTION>SPECIALIZED DISCLOSURE REPORT <TEXT> Document 1 - file: formsd2015.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-1.01 <SEQUENCE>2 <FILENAME>ex101conflictmineralsrepor.htm <DESCRIPTION>EXHIBIT 1.01 <TEXT> Document 2 - file: ex101conflictmineralsrepor.htm
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