Alliant Energy (LNT) Q4 2025 earnings review
Top-Line Data Center Growth Obscured by Rising Capital Costs
Alliant's revenue grew a healthy 9.0% YoY in Q4, but the bottom line buckled under the weight of the company's massive expansion. Non-GAAP EPS fell to $0.60 (down from $0.70 last year), missing the operational leverage expected from base rate increases. The culprit? Surging O&M, depreciation, and financing expenses required to support the generation infrastructure for incoming data centers. Despite the Q4 earnings compression, full-year non-GAAP EPS landed at $3.22, and management reaffirmed 2026 guidance, projecting a return to steady ~6% earnings growth.
🐂 Bull Case
Management successfully renegotiated the electric service agreement with QTS for a new project location, proving the viability of their 'Individual Customer Rate' framework.
Despite a noisy Q4, Alliant affirmed 2026 EPS guidance of $3.36-$3.46, pointing to a continuation of their 6%+ compound annual growth track record.
🐻 Bear Case
Q4 operating expenses surged $114M YoY (up 15%), significantly outpacing the $88M increase in revenue, driven by planned maintenance and new generation costs.
Interest expense climbed 16.6% YoY in Q4 to $140M as the company funds its massive capital expenditure plan, directly dragging down net income before the new load fully ramps.
⚖️ Verdict: ⚪
Neutral. The long-term data center growth story remains highly compelling, but Q4 explicitly shows the growing pains. Investors must be prepared to stomach higher near-term financing and O&M costs as the company builds out the infrastructure to capture future load.
Key Themes
O&M and Depreciation Drag
Reversing. The operational leverage story cracked this quarter. 'Other operation and maintenance' costs spiked 46% YoY in Q4 (from $107M to $156M), while depreciation rose 7% to $215M. Management attributed this to planned generation maintenance and the addition of new energy resources. This specific data point contradicts the narrative that authorized rate base increases will smoothly drop to the bottom line during the aggressive buildout phase.
Financing Costs Eroding Earnings
Accelerating. Interest expense rose for the fourth consecutive quarter, hitting $140M in 25Q4 (up from $120M in 24Q4). Full-year interest expense jumped 14% to $512M. With an updated CapEx plan calling for $3.1B+ annually through 2029 in a 'higher for longer' macro interest rate environment, debt servicing will remain a heavy anchor on EPS growth.
Massive CapEx Pipeline Unlocked
Accelerating. Alliant updated its capital expenditure forecast to a staggering $13.4 billion for 2026-2029 (averaging nearly $3.35B per year). This compares to $2.48B spent in 2025. This rate base expansion is heavily front-loaded into Generation—specifically renewables, storage, and gas projects—securing long-term authorized returns.
Data Center Demand Conversion
Stable. The hyperscaler thesis continues to materialize. Management explicitly highlighted a renegotiated electric service agreement with QTS based on a new project location. This proves the company’s 'plug-in-ready' strategy and Individual Customer Rate frameworks are successfully securing multi-gigawatt loads in Iowa and Wisconsin.
Renewables and Energy Storage Execution
Accelerating. The company continues to shift its generation mix, driving technological innovation onto the grid. CapEx for renewables and energy storage projects is pegged at over $1.0B annually through 2029 ($1.05B in '26, scaling to $1.49B in '29). These investments not only meet data center ESG requirements but also provide a steady stream of rate base growth.
Non-Utility Valuation Charges
Stable. The company recorded an unexpected $0.05 per share ($12M net of tax) asset valuation charge in Q4 related to its non-utility business. While excluded from ongoing EPS, it highlights underlying volatility and capital allocation inefficiencies outside of the regulated core operations.
Other KPIs
Stable. Cash generated from operations was virtually flat compared to $1.167B in 2024. Given the massive ramp in CapEx ($2.48B in 2025), the company is running a significant free cash flow deficit, relying heavily on debt and potential equity issuances to bridge the gap.
Accelerating. Combined short-term ($88M), current maturities ($1.07B), and long-term debt ($10.95B) increased significantly from $10.4B at the end of 2024. This ballooning debt load directly explains the 14% full-year jump in interest expense.
Guidance
Stable. The midpoint of $3.41 implies a 5.9% YoY growth rate over the 2025 actual of $3.22. This perfectly aligns with management's historical target of ~6% compound annual earnings growth, indicating confidence that base rate increases will offset the higher O&M and interest headwinds seen in Q4.
Accelerating. A massive 26% implied increase over FY25's $2.48B total spend. The capital is primarily allocated to Renewables/Storage ($1.05B) and Gas projects ($970M) to support looming data center demands.
Key Questions
O&M Cost Normalization
Q4 saw a significant 46% YoY spike in 'Other O&M' tied to generation maintenance and new resources. How much of this is a structural step-up associated with the new generation fleet, and how much is truly transient?
QTS Renegotiation Details
The earnings release mentions a renegotiated electric service agreement with QTS based on a 'new project location'. Does this alter the previously communicated timeline, load ramp, or capital requirements for the QTS partnership?
Equity Issuance Timing
With CapEx dramatically accelerating to $3.13B in 2026 and operating cash flow remaining flat at $1.17B, what is the exact timeline and magnitude of expected equity issuances to protect the balance sheet next year?