LNT

Alliant Energy Corp. 2024 Annual Report (10-K) Summary

Business Context and Reporting Period

This Form 10-K covers the fiscal year ended December 31, 2024, for Alliant Energy Corporation and its primary subsidiaries, Interstate Power and Light Company (IPL) and Wisconsin Power and Light Company (WPL). Alliant Energy is a regulated investor-owned public utility holding company serving approximately 1,000,000 electric and 430,000 natural gas customers in Iowa and Wisconsin. The company operates through two reportable segments: IPL (Iowa) and WPL (Wisconsin), alongside non-utility holdings managed by Alliant Energy Finance (AEF).

Key Financial Metrics

Material Changes vs. Prior Period

• Revenue Decline: Total revenues decreased by $46 million (1.1%) primarily due to lower gas utility revenues ($75 million decrease) driven by lower natural gas prices and warmer winter temperatures reducing sales volumes. Electric utility revenues increased slightly by $27 million.
• Net Income Decrease: Net income declined by $13 million. This was driven by a $60 million non-cash asset valuation charge for IPL's Lansing Generating Station (due to regulatory disallowance of return on remaining net book value), higher depreciation, and restructuring charges. These were partially offset by lower fuel costs and higher revenue requirements from capital investments.
• Asset Retirement Obligations (ARO): ARO liabilities increased significantly by $409 million (to $663 million total) due to the revised EPA Coal Combustion Residuals (CCR) Rule, which expanded regulation to include inactive ash ponds and landfills.
• Capital Expenditures: Investing cash outflows increased by $146 million, reflecting heavy investment in renewable generation (solar and wind), energy storage, and grid modernization.

Guidance, Outlook, and Risks

• Dividend Increase: Alliant Energy announced a 6% increase in its targeted 2025 annual common stock dividend to $2.03 per share (quarterly rate of $0.5075).
• Capital Plan: The company forecasts approximately $11 billion in capital expenditures over the next four years, focused on renewable generation, energy storage, and grid resilience. Specific 2025-2028 plans include ~1,200 MW of new wind/solar and ~1,000 MW of energy storage.
• Regulatory Environment:
  • IPL: Subject to a retail electric base rate moratorium from October 2025 through September 2029, though it may request updates if returns fall significantly below authorized levels.
  • WPL: Approved rate increases effective Jan 1, 2024, and Jan 1, 2025, with an earnings sharing mechanism in place.
• Key Risks:
  • Regulatory: Uncertainty regarding EPA rules on GHG emissions (Section 111(d)), CCR, and water quality; potential inability to recover costs for new generation or environmental compliance.
  • Construction: Risks of cost overruns and delays on large-scale renewable and storage projects.
  • Market: Exposure to commodity price volatility (mitigated by cost recovery mechanisms) and interest rate fluctuations.
  • Cybersecurity: Ongoing threats to critical infrastructure and data systems.

Investor Verification Checklist

• Regulatory Recovery: Verify the status of cost recovery for the $205 million in incremental solar construction costs at WPL and the $60 million Lansing Generating Station charge at IPL.
• ARO Liabilities: Monitor future adjustments to the $409 million ARO increase recorded in 2024 as site closure plans are finalized under the revised CCR Rule.
• Capital Execution: Track progress on the $11 billion capital plan, specifically the in-service dates for planned energy storage and renewable projects to ensure tax credit eligibility.
• Rate Moratorium: Watch for any filings by IPL to request rate relief during the 2025-2029 moratorium period if returns on equity fall below thresholds.
• Load Growth: Assess the impact of new data center agreements (e.g., Big Cedar Industrial Center) on future load growth and capital requirements.