---
schema_version: "secwatch.filing_event.v1"
accession: "0000352541-21-000091"
form_type: "8-K"
ticker: "LNT"
cik: "0000352541"
company_name: "ALLIANT ENERGY CORP"
filed_at: "2021-11-04T23:59:59+00:00"
generated_at: "2026-06-28T13:23:04.446484+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# IPL redeems all 8M Series D Preferred shares for ~$200M, delisting Dec 15

## Summary
- Interstate Power & Light (Alliant Energy subsidiary) calls all 8M shares of 5.100% Series D Preferred Stock (IPLDP).
- Redemption price set at $25/share plus accrued dividends; total ~$200M.
- Redemption effective December 15, 2021; shares will be delisted from Nasdaq.
- Series D Preferred Stock held through DTC; payment via EQ Shareowner Services.
- Quarterly dividend scheduled Dec 15 still paid separately to record holders.

## SEC filing metadata
- accession: 0000352541-21-000091
- form_type: 8-K
- ticker: LNT
- cik: 0000352541
- company_name: ALLIANT ENERGY CORP
- filed_at: 2021-11-04T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/352541/000035254121000091/0000352541-21-000091-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/52485/000035254121000091/lnt-20211103.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000352541-21-000091
- JSON: https://secwatch.observer/filing/0000352541-21-000091.json
- Plain text: https://secwatch.observer/filing/0000352541-21-000091.txt

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