---
schema_version: "secwatch.filing_event.v1"
accession: "0000352541-25-000074"
form_type: "8-K"
ticker: "LNT"
cik: "0000352541"
company_name: "ALLIANT ENERGY CORP"
filed_at: "2025-09-11T23:59:59+00:00"
generated_at: "2026-05-17T06:55:28.024104+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# IPL prices $300M 5.600% senior debentures due 2055; proceeds for debt reduction

## Summary
- IPL (Alliant Energy subsidiary) priced $300M aggregate principal of 5.600% senior debentures due Oct 1, 2055.
- Net proceeds to reduce outstanding receivables purchase program, commercial paper, and general corporate purposes.
- Offering expected to close Sept 11, 2025, subject to customary conditions.
- Joint book-running managers include KeyBanc, PNC Capital Markets, TD Securities, U.S. Bancorp.

## SEC filing metadata
- accession: 0000352541-25-000074
- form_type: 8-K
- ticker: LNT
- cik: 0000352541
- company_name: ALLIANT ENERGY CORP
- filed_at: 2025-09-11T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/352541/000035254125000074/0000352541-25-000074-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/52485/000035254125000074/lnt-20250908.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000352541-25-000074
- JSON: https://secwatch.observer/filing/0000352541-25-000074.json
- Plain text: https://secwatch.observer/filing/0000352541-25-000074.txt

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