{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-25-026398","form_type":"8-K","ticker":"LNT","cik":"0000352541","company_name":"ALLIANT ENERGY CORP","filed_at":"2025-05-19T23:59:59+00:00","discovered_at":"2026-05-14T18:02:50.946074+00:00","generated_at":"2026-05-21T02:19:44.857160+00:00","sec_items":["8.01","9.01"],"event_type":"debt","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Interstate Power & Light prices $600M 5.600% senior debentures due 2035","bullets":["IPL issued $600M aggregate principal of 5.600% senior debentures due June 29, 2035.","Net proceeds to retire $50M 5.50% debentures due July 2025 and $250M 3.40% debentures due Aug 2025.","Proceeds also used to reduce commercial paper and receivables program; closing expected May 19, 2025.","Joint book-running managers: BofA Securities, Mizuho, MUFG Securities Americas, and Wells Fargo Securities."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-25-026398","json":"https://secwatch.observer/filing/0001628280-25-026398.json","markdown":"https://secwatch.observer/filing/0001628280-25-026398.md","text":"https://secwatch.observer/filing/0001628280-25-026398.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/352541/000162828025026398/0001628280-25-026398-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/52485/000162828025026398/lnt-20250513.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-21T02:19:44.857160+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"}