---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-116990"
form_type: "8-K"
ticker: "LNT"
cik: "0000352541"
company_name: "ALLIANT ENERGY CORP"
filed_at: "2025-05-09T23:59:59+00:00"
generated_at: "2026-05-22T02:33:06.226738+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Alliant Energy enters $1.3B common stock distribution agreement with forward sale option

## Summary
- Agreement with nine agents and forward purchasers to sell up to $1.3B of common stock at market prices.
- Forward confirmations allow borrowing and sale of shares by forward purchasers; proceeds deferred until physical settlement.
- Net proceeds for general corporate purposes including debt repayment, capex, working capital, and acquisitions.
- Prospectus supplement filed May 9, 2025 under existing shelf registration (333-276062).

## SEC filing metadata
- accession: 0001193125-25-116990
- form_type: 8-K
- ticker: LNT
- cik: 0000352541
- company_name: ALLIANT ENERGY CORP
- filed_at: 2025-05-09T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/352541/000119312525116990/0001193125-25-116990-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/352541/000119312525116990/d947570d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-116990
- JSON: https://secwatch.observer/filing/0001193125-25-116990.json
- Plain text: https://secwatch.observer/filing/0001193125-25-116990.txt

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