---
schema_version: "secwatch.filing_event.v1"
accession: "0000352541-23-000030"
form_type: "8-K"
ticker: "LNT"
cik: "0000352541"
company_name: "ALLIANT ENERGY CORP"
filed_at: "2023-03-13T23:59:59+00:00"
generated_at: "2026-06-18T04:58:30.053655+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Alliant Energy issues $75M additional 3.875% convertible notes due 2026

## Summary
- Issued $75M aggregate principal of 3.875% Convertible Senior Notes due 2026 via full exercise of initial purchasers' option.
- Net proceeds from the option closing were approximately $73.7M after fees and expenses.
- Notes rank senior, unsecured; same indenture and terms as $500M Initial Notes issued March 2, 2023.
- Maximum shares issuable upon conversion of Option Notes is 1,457,437 shares of common stock.
- Notes sold in private placement under Rule 144A to QIBs; not registered under Securities Act.

## SEC filing metadata
- accession: 0000352541-23-000030
- form_type: 8-K
- ticker: LNT
- cik: 0000352541
- company_name: ALLIANT ENERGY CORP
- filed_at: 2023-03-13T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 2.03, 3.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/352541/000035254123000030/0000352541-23-000030-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/352541/000035254123000030/lnt-20230310.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000352541-23-000030
- JSON: https://secwatch.observer/filing/0000352541-23-000030.json
- Plain text: https://secwatch.observer/filing/0000352541-23-000030.txt

## Key facts
- Debt Financings
  ALLIANT ENERGY CORP incurred convertible notes of $75 million with qualified institutional buyers at 3.875% maturing 2026.
  - Instrument: convertible notes
  - Principal: $75 million
  - Counterparty: qualified institutional buyers
  - Rate: 3.875%
  - Maturity: 2026
  - Event: incurrence
  source text: On March 10, 2023, Alliant Energy Corporation (the “ Company ”) issued $75 million aggregate principal amount of 3.875% Convertible Senior Notes due 2026 (the “ Option Notes ”) in a private offering to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the “ Securities Act ”), pursuant to the initial purchasers’ full exercise of their option to purchase such notes, granted in connection with the Company’s previously disclosed offering of $500 million aggregate principal amount of the Company’s 3.875% Convertible Senior Notes due 2026 (the “ Initial Notes ” and, together with the Option Notes, the “ Notes ”), which closed on March 2, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/352541/000035254123000030/0000352541-23-000030-index.htm

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