---
schema_version: "secwatch.filing_event.v1"
accession: "0000352541-26-000030"
form_type: "8-K"
ticker: null
cik: "0000107832"
company_name: "WISCONSIN POWER & LIGHT CO"
filed_at: "2026-05-01T23:59:59+00:00"
generated_at: "2026-05-15T00:13:17.284832+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Alliant Energy Q1 GAAP EPS $0.87 vs $0.83; reaffirms FY guidance; signs 370 MW data center deal

## Summary
- Q1 GAAP EPS $0.87 ($0.82 ongoing) vs $0.83/$0.83 in Q1 2025.
- Reaffirmed FY 2026 ongoing EPS guidance $3.36-$3.46; targeting over 6% CAGR.
- Signed ~370 MW data center service agreement in Iowa; total contracted data center demand ~3.4 GW.
- Non-GAAP ongoing EPS excludes $0.05/share deferred tax remeasurement benefit.
- Higher revenue requirements from rate base investments at IPL/WPL drove earnings; offset by higher financing and O&M costs.

## SEC filing metadata
- accession: 0000352541-26-000030
- form_type: 8-K
- cik: 0000107832
- company_name: WISCONSIN POWER & LIGHT CO
- filed_at: 2026-05-01T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/107832/000035254126000030/0000352541-26-000030-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/52485/000035254126000030/lnt-20260430.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000352541-26-000030
- JSON: https://secwatch.observer/filing/0000352541-26-000030.json
- Plain text: https://secwatch.observer/filing/0000352541-26-000030.txt

## Key facts
- Earnings Releases
  WISCONSIN POWER & LIGHT CO updated its three months ended March 31, 2026 guidance (reaffirmed).
  - Period: three months ended March 31, 2026
  - Guidance: reaffirmed
  - Result: reported results
  source text: On April 30, 2026, Alliant Energy Corporation issued a press release announcing its financial results for the three months ended March 31, 2026.
  evidence_url: https://www.sec.gov/Archives/edgar/data/107832/000035254126000030/0000352541-26-000030-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.