{"schema_version":"secwatch.filing_event.v1","accession":"0000352541-21-000099","form_type":"8-K","ticker":"LNT","cik":"0000352541","company_name":"ALLIANT ENERGY CORP","filed_at":"2021-11-19T23:59:59+00:00","discovered_at":"2026-05-14T18:04:15.089464+00:00","generated_at":"2026-06-28T06:43:27.535503+00:00","sec_items":["8.01","9.01"],"event_type":"debt","sentiment":"positive","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"IPL prices $300M 3.100% senior debentures due 2051; to fund preferred stock redemption","bullets":["Offering of $300M aggregate principal of 3.100% senior debentures due Nov 30, 2051.","Proceeds to redeem 5.100% Series D Cumulative Perpetual Preferred Stock and for general corporate purposes.","Closing expected Nov 19, 2021; underwriters led by Goldman Sachs, J.P. Morgan, MUFG, U.S. Bancorp.","Issuer is Interstate Power and Light, wholly owned subsidiary of Alliant Energy (LNT)."],"urls":{"canonical":"https://secwatch.observer/filing/0000352541-21-000099","json":"https://secwatch.observer/filing/0000352541-21-000099.json","markdown":"https://secwatch.observer/filing/0000352541-21-000099.md","text":"https://secwatch.observer/filing/0000352541-21-000099.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/352541/000035254121000099/0000352541-21-000099-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/52485/000035254121000099/lnt-20211116.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-28T06:43:27.535503+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"}