<SEC-DOCUMENT>0000067716-21-000019-index.html : 20210326
<SEC-HEADER>0000067716-21-000019.hdr.sgml : 20210326
<ACCEPTANCE-DATETIME>20210326113039
ACCESSION NUMBER:		0000067716-21-000019
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20210326
DATE AS OF CHANGE:		20210326

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:				301133956
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-03480
		FILM NUMBER:		21775721

	BUSINESS ADDRESS:	
		STREET 1:		1200 WEST CENTURY AVENUE
		CITY:			BISMARCK
		STATE:			ND
		ZIP:			58503
		BUSINESS PHONE:		701-530-1000

	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>DEFA14A
<SEQUENCE>1
<FILENAME>a2021proxynotice-nextgen.htm
<DESCRIPTION>MDU RESOURCES GROUP, INC. 2021 PROXY NOTICE
<TEXT>
Document 1 - file: a2021proxynotice-nextgen.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>notice-2x011a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: notice-2x011a.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>notice-2x021a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: notice-2x021a.jpg

</DOCUMENT>
</SEC-DOCUMENT>