MDU RESOURCES GROUP INC — Director's Dealing 2010

May 18, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MDU RESOURCES GROUP INC (MDU)
CIK: 0000067716
Period of Report: 2010-05-17

Reporting Person: LEWIS RICHARD H (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-17	Common Stock	A	4050	$19.522	Acquired	20250	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Phantom Stock	$0		Common Stock (10853.612)	10853.612	Direct

Footnotes

F1: 1 for 1

F2: Units are to be settled in cash after reporting person's retirement.