---
schema_version: "secwatch.filing_event.v1"
accession: "0000352541-25-000029"
form_type: "8-K"
ticker: null
cik: "0000107832"
company_name: "WISCONSIN POWER & LIGHT CO"
filed_at: "2025-03-10T23:59:59+00:00"
generated_at: "2026-05-25T00:46:01.132825+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Alliant Energy Chairman John O. Larsen to retire after 2025 annual meeting; Patrick E. Allen named successor

## Summary
- John O. Larsen informed boards he plans to retire as Chairman and board member after 2025 Annual Meeting of Shareowners.
- Patrick E. Allen, board member since 2011, designated as Board Chair effective after the 2025 Annual Meeting.
- Change applies to Alliant Energy, Interstate Power & Light, and Wisconsin Power & Light boards.

## SEC filing metadata
- accession: 0000352541-25-000029
- form_type: 8-K
- cik: 0000107832
- company_name: WISCONSIN POWER & LIGHT CO
- filed_at: 2025-03-10T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/107832/000035254125000029/0000352541-25-000029-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/52485/000035254125000029/lnt-20250307.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000352541-25-000029
- JSON: https://secwatch.observer/filing/0000352541-25-000029.json
- Plain text: https://secwatch.observer/filing/0000352541-25-000029.txt

## Key facts
- Executive change
  John O. Larsen departed as Chairman of the Board at WISCONSIN POWER & LIGHT CO.
  - Action: retire
  - Role: Chairman of the Board
  source text: On March 7, 2025, John O. Larsen informed the Boards of Directors (the Boards) of Alliant Energy Corporation (Alliant Energy), Interstate Power and Light Company (IPL) and Wisconsin Power and Light Company (WPL, and together with Alliant Energy and IPL, the Companies) that he plans to retire as Chairman of the Board and as a member of the Boards when his term expires after the 2025 Annual Meeting of Shareowners.
  evidence_url: https://www.sec.gov/Archives/edgar/data/107832/000035254125000029/0000352541-25-000029-index.htm
- Executive change
  Patrick E. Allen was appointed as Board Chair at WISCONSIN POWER & LIGHT CO.
  - Action: designated
  - Role: Board Chair
  source text: On March 7, 2025, the Boards designated Patrick E. Allen as Board Chair of the Companies effective after the 2025 Annual Meeting of Shareowners.
  evidence_url: https://www.sec.gov/Archives/edgar/data/107832/000035254125000029/0000352541-25-000029-index.htm

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