mdU

resources group, inc.

Natural Gas and Oil Production

Pipeline and Energy Services

Construction Materials and Contracting

Electric

Natural Gas Distribution

Construction Services Offices

Construction Services Authorized

States of Operations

mdu resources group, inc.

achievements

We are a member of the S&P MidCap 400

2007 Fortune 1,000 List

n No. 519 based on total revenues

index, providing value-added natural resource

n No. 4 in Mining and Crude Oil Production group for total

products and related services that are essential

return to shareholders annually for 1996-2006

to energy and transportation infrastructure.

Forbes Platinum 400 List of

We operate in three core lines of business:

Best Big Companies in America

n Eighth consecutive year

energy, construction materials and utility

n Companies compared against peers on 12-month

resources. MDU Resources includes natural gas

and five-year basis for shareholder returns, sales and

and oil production, natural gas pipelines and

earnings-per-share growth, debt-to-capital ratios

energy services, construction materials and

Mergent Dividend Achiever

n Honor based on more than 10 consecutive years of

contracting, construction services, and electric

dividend increases -- MDU Resources has increased

and natural gas utilities.

dividends 17 consecutive years

Platts Top 250 Global Energy Companies List

n Based on outstanding financial performance using asset

worth, revenues, profits and return on invested capital

EEI Index of Investor-Owned Electric Utilities Award

n No. 1 for total shareholder return on the Edison Electric

Institute index of small-cap U.S. shareholder-owned electric

utilities for five-year period ending September 30, 2007

n 212 percent total shareholder return for five-year period

ending September 30, 2007