Northwestern Energy Group Inc (NWE) | The Buildout — AI Infrastructure
The Verdict
NorthWestern Energy Group is a regulated electric and natural gas utility. It owns and co-owns generation, and it transmits and distributes electricity and gas under rates set by state commissions. Its link to the AI buildout is entirely indirect: data-center developers are prospecting its Montana and South Dakota electric territories for large electric load. The company sells no chips, servers, software or power equipment, and management speaks only of data centers and large-load customers. The whole opportunity sits at the development-agreement stage — no Energy Service Agreement is signed, and no data-center capital sits in the capital plan or the earnings guidance.
| Market Cap | — |
| Revenue (TTM) | $1.7B |
| Revenue Growth | +10.7% |
| EBITDA Margin (TTM) | 34.1% |
| Net Debt | $3.6B |
| Earnings Beats | 4 of 7 |
| P/E (TTM) | — |
| EV/EBITDA (TTM) | — |
What We Like
- Shareholders approved the Black Hills merger and all merger proposals, and constructive settlements are in place with each of the key intervenors in Montana, Nebraska and South Dakota.
- The combined company targets 5%–7% EPS growth versus 4%–6% standalone, on a rate base management says roughly doubles.
- 2026 EPS guidance of $3.68–$3.83 was reaffirmed on both 2026 calls, and the $3.2 billion capital plan was held unchanged.
- Three data-center development agreements are signed, and the Quantica agreement scales from 25 MW to 1.1 GW.
- South Dakota wildfire legislation was signed into law, with a wildfire mitigation plan to be submitted to the South Dakota Public Utilities Commission in 2026.
What We’re Watching
- The Montana PSC decision on the merger is expected mid-October to mid-November 2026; it gates closing and the combined-growth framing.
- Energy Service Agreements with Quantica and Atlas are targeted by year-end 2026; the count already narrowed from three developers to two.
- Colstrip cost recovery: $0.05 per share of unrecovered operating expenses in both Q1 and Q2 2026, gated behind an outstanding 2024 rate review reconsideration order.
- South Dakota sales tax relief on data-center equipment purchases failed; management is hopeful for the upcoming legislative session.
The base utility is performing about as guided — guidance reaffirmed, capital plan unchanged, and Q2 weather normalized after an anomalous Q1. The two items that would change the direction are both unresolved: the merger is one approval from closing, and the data-center pipeline has no signed contracts. The thesis reads as intact but unexercised, an option that has not been paid for yet. The open question is whether the Montana PSC approves both the merger and the large-new-load tariff, and whether the first Energy Service Agreements actually sign.
Earnings Beat
NorthWestern reported Q2 2026 revenue of $392.6 million and a gross margin of 79.9%. GAAP diluted EPS was $0.40 and non-GAAP adjusted diluted EPS was $0.50, up $0.10 from 2025. Net income was $25.0 million against $21.2 million a year earlier — an increase management attributed primarily to new rates and retail volumes, offset in part by operating, administrative, and general costs.
| Metric | Q2 FY2026 | Q1 FY2026 | Q2 FY2025 | YoY |
|---|---|---|---|---|
| Revenue | $393M | $498M | $343M | +14.6% |
| Gross margin | 79.9% | 57.3% | 59.8% | +2010bps |
| EBITDA | $131M | $181M | $123M | +6.6% |
| EPS | $0.41 | $1.03 | $0.35 | +17.7% |
| Unrecovered Colstrip operating expenses | $0.05 | $0.05 | n/a | — |
I would not concern yourself too much with megawatts until you see development agreements.— Brian Bird, President and CEO, 2026-07-30
Management tone: Across the two 2026 calls management reaffirmed the same guidance and the same capital plan. On the merger the register escalated — the CEO closed the Q2 call saying "We need to be bigger." On data centers it moved the other way: the ESA target narrowed from three developers to two, and management declined to size the request queue in megawatts. On Colstrip it named the recovery gap directly and pointed to an outstanding rate-review order as the blocker.
Management Guidance
Management reaffirmed 2026 non-GAAP earnings guidance of $3.68–$3.83 per diluted share and long-term rate base and EPS growth of 4%–6%, with the $3.2 billion capital plan for 2026–2030 unchanged. The guidance assumes an effective income tax rate of approximately 14% to 18%. Management states the plan does not include any incremental investment that may be driven by additional opportunities related to regional transmission growth or serving large loads.
Trajectory
Revenue is stable rather than accelerating. The trailing four quarters run $387 million, $414 million, $498 million and $393 million — the winter quarter is the largest by season — and Q2 2026 revenue was up about 15% year over year. EBITDA margin is compressing: 36.4% in Q1 2026 against 40.1% a year earlier, and 33.4% in Q2 against 35.9%. The disclosed drivers are incremental Colstrip ownership costs, higher depreciation and interest expense, and cost-recovery revenue that carries matching cost. The computed signals flag gross, operating and EBITDA margins all compressing, and TTM free cash flow to net income conversion is negative after heavy capital spending.
The Model
The model projects FY+1 revenue of $1,756 million and EBITDA of $637 million, a 36.3% margin, and FY+2 revenue of $1,850 million and EBITDA of $673 million, a 36.4% margin. The near-term anchor is the regulated base — reaffirmed 2026 earnings guidance and the unchanged $3.2 billion capital plan — plus the Black Hills combination. FY+2 depends on whether new rates, transmission and any large-load capital enter the plan; management has excluded data-center and regional-transmission investment from both the plan and the guidance.
| Metric | FY2025 | Next FY (E) | Following FY (E) |
|---|---|---|---|
| Revenue | $1.6B | $1.8B | $1.9B |
| YoY Growth | — | +9.0% | +5.4% |
| EBITDA | $575M | $637M | $673M |
| EBITDA Margin | 35.7% | 36.3% | 36.4% |
Projections are the median of 5 independent model runs. The model’s revenue sits 1.6% above analyst consensus.
Management reaffirmed 2026 non-GAAP earnings guidance of $3.68–$3.83 per diluted share and long-term rate base and EPS growth of 4%–6%, with the $3.2 billion capital plan for 2026–2030 unchanged. The guidance assumes an effective income tax rate of approximately 14% to 18%. Management states the plan does not include any incremental investment that may be driven by additional opportunities related to regional transmission growth or serving large loads.
What Could Go Right — and Wrong
- The Montana PSC approves the Black Hills merger, activating the combined 5%–7% earnings growth target on a rate base management says roughly doubles.
- Quantica and Atlas sign Energy Service Agreements, converting development agreements into contracted large-load service.
- The Montana large new load tariff is approved, making large-load capital investable under a cost-recovery framework.
- Colstrip moves into base rates, turning a $0.05 quarterly drag into recovered operating expense.
- Power prices stay high enough to recover incremental Colstrip operating expense without waiting on a rate case.
- The Montana PSC denies or attaches conditions to the merger, unwinding the combined-growth rationale.
- Zero Energy Service Agreements sign by year-end 2026, leaving the data-center pipeline theoretical.
- Sabey's land procurement stays unresolved, narrowing the funnel further from three developers to two.
- Colstrip recovery remains blocked behind the outstanding 2024 rate review reconsideration order and the drag repeats.
- Transmission import capacity keeps declining through 2028 and the large load cannot physically be served.
Looking Ahead
The next twelve months resolve two pending Montana decisions. The PSC rules on the Black Hills merger between mid-October and mid-November 2026, and it holds the large new load tariff filed in March 2026, which was filed without an ESA, contrary to the original plan. Management targets Energy Service Agreements with Quantica and Atlas by year-end 2026. Beyond that, the PCCAM docket is guided to Q4 2026 or early 2027, South Dakota's sales tax on equipment purchases returns in the upcoming legislative session, and the Colstrip rate review waits on a reconsideration order that had not arrived as of the Q2 call.
- Mid-October to mid-November 2026MPSC merger decision — Montana order that gates closing and the combined-growth target.
- Year-end 2026Quantica and Atlas ESAs — Signed Energy Service Agreements would be the first contracted load.
- Pending; no date givenMontana large-new-load tariff — MPSC order setting the cost-recovery framework for large load.
- Q4 2026 or early 2027PCCAM docket — Interim tariff waiver covering Avista-share Colstrip operating costs.
- Upcoming legislative sessionSouth Dakota sales tax — Equipment sales tax is the stated blocker for SD data centers.
- Early 2029Quantica project start — Targeted first service date for the 1.1 GW Quantica development.
Financials
Annual Summary
| Metric | FY2024 | FY2025 | TTM | YoY |
|---|---|---|---|---|
| Revenue | $1.5B | $1.6B | $1.7B | +6.4% |
| Gross Margin | 56.6% | 62.6% | 66.5% | +598bps |
| EBITDA | $551M | $575M | $577M | +4.4% |
| EBITDA Margin | 36.4% | 35.7% | 34.1% | 68bps |
| Net Income | $224M | $181M | $171M | -19.3% |
| Free Cash Flow | −$142M | −$130M | −$192M | — |
| Net Cash | — | — | — | — |
Key Ratios (Trailing)
- P/E TTM—
- EV/EBITDA TTM—
- EV/Revenue TTM—
- Price/FCF TTM—
- Gross Margin (TTM)66.5%
- EBITDA Margin (TTM)34.1%
- Net Margin (TTM)10.1%
- ROIC3.9%
- FCF Conversion-33.3%
- SBC / Revenue0.4%
The Company
NorthWestern Energy Group is a regulated electric and natural gas utility serving approximately 850,300 customers in Montana, South Dakota, Nebraska and Yellowstone National Park. It reports in two segments — Electric Utility Operations, covering the generation, purchase, transmission and distribution of electricity, and Natural Gas Utility Operations, covering production, purchase, transmission, storage and distribution of natural gas. It sells electricity and natural gas under rates set by state commissions and has committed to Net-Zero by 2050 for Scope 1 and Scope 2 emissions.
The company operates an asset-heavy, regulated fleet of hydroelectric, coal, natural gas and wind plants, often through partial ownership. Colstrip Units 3 & 4, at 814 MW, is 55% owned; Big Stone is 23.4%, Neal Unit No. 4 is 8.7% and Coyote is 10.0%. Colstrip is operated by Talen Montana, LLC, and a coal supply agreement from adjacent reserves runs through 2033. A pending merger with Black Hills Corporation and a $3.2 billion capital plan for 2026–2030 support long-term rate base growth of 4%–6%.
Business Segments
Competitive Landscape
In its filings, NorthWestern's competitive references are mostly about transmission interconnections, where it names a list of neighboring systems and utilities. As a regulated monopoly in its own territories, it does not compete for retail customers. In the data-center channel it competes with other utilities for developer sites. Management frames the Black Hills merger as a response to a more competitive environment, telling analysts the company needs to be bigger.
- Named in the 10-K as a transmission interconnection counterparty.
- Named in the 10-K as a South Dakota transmission interconnection counterparty.
- PacifiCorpNamed in filings; not discussed.
- Idaho Power CompanyNamed in filings; not discussed.
- Otter Tail Power CompanyNamed in filings; not discussed.
Supply Chain
NorthWestern sits at the delivery end of the energy chain. It buys fuel, purchased power, transmission and gas transportation, then sells regulated electricity and gas to retail customers. Its supply comes from owned and co-owned plants plus market purchases.
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