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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
67716	Mdu Resources Group Inc	MDU	Mining & Quarrying Of Nonmetallic Minerals (No Fuels) (1400)	410423660

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1188880	S Thomas Everist	Mdu Resources Group, Inc. 1200 West Century Avenue Bismarck ND 58503		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2013-05-10	30,000	$26.38	1,700,000	No	4	S	Indirect	By Corporation

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	By Corporation

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	65,590	Direct

Reported Derivative Holdings

Sec. Name	Sec. Type	Price	Date	Expiration Date	Amount	Remaning Holdings	Nature of Ownership
Common Stock	Phantom Stock	$0.00			29,447	29,447	Direct

Expiration Date	Amount	Remaning Holdings	Nature of Ownership
	29,447	29,447	Direct

Footnotes

The price reported in column 4 is the weighted average sale price. The shares were sold in multiple transactions at prices ranging from $26.210 to $26.440, inclusive. The reporting person undertakes to provide to MDU Resources Group, Inc., any shareholder of MDU Resources Group, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
1 for 1
Units are to be settled in cash after reporting person's retirement.