NorthWestern Energy Earnings Call: Growth Amid Headwinds

Northwestern ((NWE)) has held its Q4 earnings call. Read on for the main highlights of the call.

NorthWestern’s latest earnings call struck a cautiously upbeat tone as management highlighted merger progress, higher earnings, and a larger capital plan, while also confronting rate disallowances, weak cash metrics, and weather-driven margin pressure. Executives framed 2026 as an inflection year, arguing that strategic moves and disciplined funding will outweigh near-term regulatory and operating headwinds.

Merger with Black Hills Corporation

NorthWestern detailed its all-stock merger of equals with Black Hills, emphasizing regulatory filings already made in Montana, Nebraska, South Dakota and at FERC alongside a filed S-4 and joint proxy. Management targets a 2026 close and expects the combined utility to double its rate base to about $11 billion, lift long-term EPS growth to 5%-7% and improve scale, diversification, and credit strength.

Acquisitions and Colstrip Ownership Increase

The company spotlighted its step-up in Colstrip ownership, first acquiring Avista’s 222 MW stake and then Puget’s interest to move from roughly 15% to about 55% and secure operational control. Executives stressed that both Avista and Puget interests were purchased for zero consideration, positioning the enlarged Colstrip stake as a low-cost tool to bolster Montana’s resource adequacy and customer affordability.

Strong Adjusted Earnings and Guidance

Management reported 2025 GAAP diluted EPS of $2.94 and adjusted EPS of $3.58, a 5.3% increase over 2024, despite weather and regulatory headwinds. Q4 adjusted EPS rose to $1.17 versus $1.13 a year earlier, and the company introduced 2026 earnings guidance of $3.68 to $3.83 per share, implying about 5% growth at the midpoint versus 2025’s adjusted results.

Updated Capital Plan and South Dakota Project

NorthWestern raised its five-year capital plan to $3.21 billion, a 17% bump from prior levels, signaling a larger pipeline of regulated investment opportunities. A key new piece is a roughly $300 million, 131 MW natural gas project in South Dakota that has been submitted for an expedited SPP resource adequacy review and included in the growth capex program.

Dividend Increase and Total-Return Proposition

The board approved a 1.5% increase in the quarterly dividend to $0.67 per share, which management said equates to a yield of about 4%. Executives reiterated an 8%-10% total-return framework from core utility operations, combining a targeted 4%-6% EPS growth rate with the dividend, and framed the payout as sustainable within their current capital and funding plan.

Data Center Development Progress

On the large-load front, NorthWestern highlighted growing traction in its data center pipeline, including a third LOI with Fonica for more than 500 MW and development agreements with Atlas Power and Seifi. The company aims to have at least one energy services agreement in place by mid-2026 and plans to file a large-load tariff in sync with a signed ESA, targeting timing by the end of the second quarter of 2026.

Near-term Revenue and Cost Mitigation at Colstrip

To blunt the earnings impact of higher Colstrip operating costs tied to the transferred Avista and Puget interests, NorthWestern is leaning on targeted regulatory and commercial tools. A temporary PCAM tariff waiver in Montana, granted in January 2026, is designed to recover roughly $18 million of incremental annual Avista-related costs, while a power sales contract through late 2027 largely offsets about $30 million tied to the Puget portion.

Montana Rate Review Disallowance

One of the more acute near-term drags is a one-time Montana rate review disallowance that produced an estimated $0.38 per-share charge in 2025 and weighed on EPS and cash generation. The company has asked regulators to reconsider the decision, but management acknowledged that the timing and outcome are unclear, leaving a pocket of earnings and cash flow uncertainty hanging over the next few periods.

Weather and Customer Margin Headwinds

Very mild weather during the second half of 2025 hurt usage and compressed margins, with management citing an estimated full-year weather impact of about negative $0.18 per share versus normal. Fourth-quarter results also reflected weaker conditions, with Q4 weather alone delivering roughly a $0.03 per-share detriment compared with prior-year levels and contributing to softer cash flow.

Under-collection and Lower Cash Metrics

Under-collection of Montana supply costs, together with the softer customer margins, drove a notable decline in cash metrics and pushed FFO-to-debt below management’s preferred range. Executives referenced FFO-to-debt in the mid-teens and indicated actual levels were closer to about 13% at year-end 2025, amplifying the need for disciplined capital allocation and measured financing choices.

Higher Operating, Depreciation and Interest Costs

Operating expenses climbed as the company stepped up maintenance work at assets like the Yellowstone County generating station and invested in wildfire mitigation, while also absorbing higher insurance, labor and benefits. Depreciation added about $0.27 per share of incremental pressure and interest expense around $0.23 per share in 2025, underscoring how the growing rate base and funding requirements are flowing through the income statement.

Data Center Timing and Execution Risks

Despite a robust pipeline, management cautioned that several data center developers are grappling with site and land challenges, particularly in the Seifi project, which could delay final ESAs. Queue volumes have been volatile and the outlook in South Dakota is especially sensitive to pending sales-tax reforms, injecting timing and execution risk into what the company sees as a meaningful long-term growth avenue.

Regulatory and Environmental Uncertainties

The merger with Black Hills still requires a series of state and federal approvals and is attracting typical intervenor scrutiny, including a reset schedule in South Dakota, which could alter timing or conditions. Management also flagged potential Environmental Protection Agency actions or other rule changes that might accelerate environmental investments at Colstrip, posing incremental capex risk not yet baked into the current plan.

Guidance and Capital Funding Outlook

For 2026, NorthWestern guided to diluted EPS of $3.68 to $3.83, implying roughly 5% growth at the midpoint over 2025’s $3.58 adjusted EPS, alongside the modest dividend increase and expanded $3.21 billion five-year capital plan. The base capital program is expected to be largely self-funded, but the new South Dakota gas project will likely require roughly 50/50 debt and equity financing, with additional debt planned in 2026 to refinance maturities as management works to rebuild FFO-to-debt from mid-teens levels.

NorthWestern’s call painted a picture of a utility in transition, balancing a sizable merger, expanding capital opportunities and an emergent data center franchise against near-term regulatory setbacks and pressured cash metrics. For investors, the story hinges on whether the company can secure approvals, execute its projects and stabilize credit ratios, thereby converting today’s strategic moves into durable earnings and total-return growth.