{"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","discovered_at":"2026-05-14T18:04:15.089062+00:00","generated_at":"2026-06-28T13:23:04.446484+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"IPL redeems all 8M Series D Preferred shares for ~$200M, delisting Dec 15","bullets":["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."],"urls":{"canonical":"https://secwatch.observer/filing/0000352541-21-000091","json":"https://secwatch.observer/filing/0000352541-21-000091.json","markdown":"https://secwatch.observer/filing/0000352541-21-000091.md","text":"https://secwatch.observer/filing/0000352541-21-000091.txt","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"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-28T13:23:04.446484+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}