MDU vs NWE: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. MDU and NWE share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined MDU and NWE exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

MDU Resources Group runs three regulated businesses out of Bismarck, North Dakota. Montana-Dakota Utilities provides electric service across the Northern Plains; Montana-Dakota, Cascade Natural Gas and Intermountain Gas distribute natural gas across the Pacific Northwest and Midwest; and WBI Energy operates a natural gas transmission and storage network of more than 3,800 miles. Together those serve roughly 1.2 million customers. The company that carried this ticker a few years ago looked nothing like this: MDU separated Knife River Corporation (construction materials and aggregates) in May 2023 and Everus Construction Group (specialty contracting) in October 2024, which is why trailing revenue of roughly $1.8 billion sits well below the multi-billion figures in older reference data. MDU is now a member of the S&P SmallCap 600 rather than an industrial conglomerate.

Full MDU guide

NorthWestern Energy Group provides regulated electricity and natural gas service to roughly 775,000 customers across Montana, South Dakota, Nebraska and Yellowstone National Park. As a rate-regulated utility, its earnings are driven by the size of its approved rate base and the returns state commissions allow on capital it invests in generation, transmission and distribution. The company targets 4% to 6% annual growth in both rate base and earnings per share, funded by a capital plan of around $683 million for 2026, and it pays a dividend with a long-term payout target of 60% to 70% of earnings.

Full NWE guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• MDU drivers: Rate base growth and a dense rate-case calendar; The proposed Bakken East Pipeline.
• NWE drivers: Pending Black Hills merger; Regulated rate-base growth.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: Financing costs are already visible in the numbers: second-quarter interest expense rose to $31.5 million from $25.4 million a year earlier, and long-term debt grew to roughly $2.6 billion from about $2.0 billion, while share count moved from about 204 million to 210 million, so both debt and equity issuance are diluting the benefit of new investment. For NWE, the largest single uncertainty is deal risk: the merger still needs Montana, Nebraska and South Dakota regulatory approval, and a delay, modification or failure would materially change the thesis.

Pick MDU if you believe its drivers more; NWE if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the MDU and NWE guides.

MDU. Second-quarter 2026 net income came in at $21.3 million, up 55.5% from $13.7 million a year earlier, on operating revenue of $375.2 million. Trailing revenue of roughly $1.81 billion reflects the post-spin perimeter only, so comparisons against pre-2023 figures that included Knife River and Everus are not meaningful. At about 22 times trailing earnings with a 6% to 8% long-term growth objective and a payout near 60% of earnings, MDU trades in the range of regulated utility peers rather than at a discount, and book value per share of roughly $13.90 puts the stock near 1.5 times book.

NWE. In the first quarter of 2026, NWE reported revenue of about $497.6 million, up roughly 7% year over year, and adjusted diluted EPS of $1.31, ahead of consensus. The company affirmed full-year 2026 EPS guidance of about $3.68 to $3.83 and its long-term 4% to 6% growth targets. Valuation sits in typical regulated-utility territory, with the forward multiple reflecting expected earnings and, increasingly, the pending exchange into Black Hills shares.

Headline figures (approximate, August 2026): MDU shows revenue (ttm) ~$1.81B, net income (ttm) ~$197M, diluted eps (ttm) ~$0.95, with 2026 guidance reaffirmed at $0.93 to $1.00, market cap ~$4.3B (~$20.55 per share on ~210M shares); NWE shows revenue (ttm) ~$1.64B, net income (ttm) ~$168M, 2026 eps guidance ~$3.68 to $3.83, dividend / yield ~$2.68 (~3.8%).

MDU and NWE are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined MDU and NWE exposure against your real portfolio. It is not an investment adviser.