---
schema_version: "secwatch.filing_event.v1"
accession: "0000352541-24-000092"
form_type: "8-K"
ticker: "LNT"
cik: "0000352541"
company_name: "ALLIANT ENERGY CORP"
filed_at: "2024-09-06T23:59:59+00:00"
generated_at: "2026-05-31T06:08:18.525694+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# IPL prices $650M in senior debentures (4.950%/5.450%) to refinance $500M maturing Dec 2024

## Summary
- $350M of 4.950% senior debentures due 2034 and $300M of 5.450% senior debentures due 2054 priced.
- Net proceeds to retire $500M of 3.25% senior debentures maturing Dec 1, 2024, plus general corporate purposes.
- Offering expected to close Sept 6, 2024; joint book-runners include Barclays, Goldman Sachs, J.P. Morgan, MUFG.
- Debentures issued under shelf registration (333-276062-01) with prospectus supplement filed Sept 5, 2024.

## SEC filing metadata
- accession: 0000352541-24-000092
- form_type: 8-K
- ticker: LNT
- cik: 0000352541
- company_name: ALLIANT ENERGY CORP
- filed_at: 2024-09-06T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/352541/000035254124000092/0000352541-24-000092-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/52485/000035254124000092/lnt-20240904.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000352541-24-000092
- JSON: https://secwatch.observer/filing/0000352541-24-000092.json
- Plain text: https://secwatch.observer/filing/0000352541-24-000092.txt

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