---
schema_version: "secwatch.filing_event.v1"
accession: "0000352541-23-000032"
form_type: "8-K"
ticker: null
cik: "0000107832"
company_name: "WISCONSIN POWER & LIGHT CO"
filed_at: "2023-03-16T23:59:59+00:00"
generated_at: "2026-06-18T00:08:39.961936+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Alliant Energy extends $1B credit facility to Dec 2027; sets new sublimits

## Summary
- Amendment extends termination date from Dec 17, 2026 to Dec 17, 2027.
- Parent sublimit set at $500M; IPL at $100M; WPL at $400M; total $1B commitment.
- LIBOR replaced with SOFR as benchmark rate; cross-default excludes convertible notes.
- Effective March 15, 2023; all three entities are borrowers under the facility.

## SEC filing metadata
- accession: 0000352541-23-000032
- form_type: 8-K
- cik: 0000107832
- company_name: WISCONSIN POWER & LIGHT CO
- filed_at: 2023-03-16T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 2.03
- EDGAR index: https://www.sec.gov/Archives/edgar/data/107832/000035254123000032/0000352541-23-000032-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/52485/000035254123000032/lnt-20230315.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000352541-23-000032
- JSON: https://secwatch.observer/filing/0000352541-23-000032.json
- Plain text: https://secwatch.observer/filing/0000352541-23-000032.txt

## Key facts
- Debt Financings
  WISCONSIN POWER & LIGHT CO amended credit facility of $1 billion total commitment with Wells Fargo Bank, National Association, as Administrative Agent maturing December 17, 2027.
  - Instrument: credit facility
  - Principal: $1 billion total commitment
  - Counterparty: Wells Fargo Bank, National Association, as Administrative Agent
  - Maturity: December 17, 2027
  - Event: amendment
  source text: The amended sublimits for borrowings by Alliant Energy at the parent company level, IPL and WPL are $500 million, $100 million and $400 million, respectively, within the $1 billion total commitment. The cross-default provision was revised to exclude conversions of convertible notes from events that would constitute a cross default. SIGNATURES Pursuant to
  evidence_url: https://www.sec.gov/Archives/edgar/data/107832/000035254123000032/0000352541-23-000032-index.htm

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