As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

 6/12/20  MDU Resources Group, Inc.         11-K       12/31/19    2:272K                                                            
 5/26/20  MDU Resources Group, Inc.         SD         12/31/19    2:362K                                                            
 2/21/20  MDU Resources Group, Inc.         10-K       12/31/19  169:27M                                                             
12/31/19  Sparby David M                    4          Director²   1:4K   MDU Resources Group, Inc.         CT’s hCue/FA             

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¹	Filing/Form Types:
	4	Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 4 { The Filer is an Insider² of the Issuer }.
	10-K	Annual Report — Form 10-K.
	11-K	Annual Report by an Employee Stock Purchase, Savings or Similar Plan — Form 11-K.
	SD	Specialized Disclosure Report re: the Use of Conflict Minerals — Form SD.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.