Alliant Energy Corp. 2025 Annual Report (10-K) Summary
Business Context and Reporting Period
This filing is the Annual Report on Form 10-K for Alliant Energy Corporation and its primary subsidiaries, Interstate Power and Light Company (IPL) and Wisconsin Power and Light Company (WPL), for the fiscal year ended December 31, 2025. Alliant Energy operates as a regulated investor-owned public utility holding company serving approximately 1.01 million electric and 435,000 natural gas customers in Iowa and Wisconsin. The company also maintains non-utility holdings through Alliant Energy Finance (AEF), including transmission interests (ATC), wind farms, and supply chain solutions (Travero).
Key Financial Metrics (2025 vs. 2024)
| Metric | 2025 | 2024 | Change |
|---|---|---|---|
| Total Revenues | $4,362 million | $3,981 million | +9.6% |
| Net Income | $810 million | $690 million | +17.4% |
| Diluted EPS | $3.14 | $2.69 | +16.7% |
| Operating Cash Flow | $1,169 million | $1,167 million | +0.2% |
| Capital Expenditures | $2,483 million | $2,249 million | +10.4% |
| Total Debt | $12,116 million | $10,096 million | +20.0% |
| Debt-to-Capitalization | 62% | 59% | +3 pts |
Note: 2024 Net Income included a $60 million non-cash asset valuation charge for IPL's Lansing Generating Station. 2025 Net Income included a $16 million non-cash asset valuation charge for non-utility holdings.
Material Changes and Drivers
- Revenue Growth: Driven by higher revenue requirements from capital investments, favorable temperature impacts on retail sales (warmer winter, hotter summer), and increased bulk power sales. Electric utility revenues increased by $325 million, and gas utility revenues increased by $60 million.
- Profitability: Utilities and Corporate Services net income increased by $153 million. This was primarily due to higher revenue requirements and the absence of the 2024 Lansing Generating Station charge, partially offset by higher operating expenses and interest costs.
- Non-Utility Performance: Non-utility and Parent net income decreased by $34 million, primarily due to an asset valuation charge related to the suspension of Travero's wind turbine blade recycling services and higher financing expenses.
- Customer Base: Retail electric customers increased to 1,009,387. The company has executed electric service agreements with new data center customers representing aggregate peak demands of approximately 3 gigawatts.
Guidance, Outlook, and Risks
Outlook and Strategy:
- Capital Plan: Alliant Energy plans approximately $13 billion in capital expenditures over the next four years (2026-2029), focusing on renewable generation, energy storage, natural gas resources, and grid modernization.
- Dividends: The company announced a 5% increase in the targeted 2026 annual common stock dividend to $2.14 per share ($0.535 quarterly).
- Rate Matters: IPL is under a retail electric base rate moratorium through September 2029. WPL received approval for base rate increases effective January 1, 2026, and January 1, 2027.
- Regulatory Uncertainty: Risks related to the recovery of costs for large load growth (data centers), environmental regulations (GHG emissions, CCR rules), and potential changes to renewable tax credits under the "One Big Beautiful Bill Act."
- Construction and Supply Chain: Delays or cost overruns in major generation and transmission projects due to supply chain disruptions, labor issues, or regulatory approvals.
- Weather and Demand: Seasonal volatility in sales volumes and the risk that large load growth customers may delay or cancel facilities.
- Cybersecurity: Ongoing threats to critical infrastructure and information systems.
Investor Verification Checklist
- Rate Recovery: Verify the status of regulatory approvals for cost recovery related to the 3 GW of new data center load and the impact of the IPL rate moratorium on cash flows.
- Tax Credit Exposure: Assess the impact of the "One Big Beautiful Bill Act" on the transferability and value of renewable tax credits, which are a significant component of project economics.
- Capital Execution: Monitor the progress and cost containment of the $13 billion capital plan, specifically the new natural gas and energy storage projects.
- Debt Maturities: Review the $1.075 billion in long-term debt maturing in 2026 and the company's refinancing strategy in the current interest rate environment.
- Non-Utility Adjustments: Confirm the final financial impact of the suspension of Travero's wind turbine blade recycling services and any future asset impairments in the non-utility segment.