{"schema_version":"secwatch.filing_event.v1","accession":"0000352541-24-000092","form_type":"8-K","ticker":"LNT","cik":"0000352541","company_name":"ALLIANT ENERGY CORP","filed_at":"2024-09-06T23:59:59+00:00","discovered_at":"2026-05-14T18:03:15.506087+00:00","generated_at":"2026-05-31T06:08:18.525694+00:00","sec_items":["8.01","9.01"],"event_type":"debt","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"IPL prices $650M in senior debentures (4.950%/5.450%) to refinance $500M maturing Dec 2024","bullets":["$350M of 4.950% senior debentures due 2034 and $300M of 5.450% senior debentures due 2054 priced.","Net proceeds to retire $500M of 3.25% senior debentures maturing Dec 1, 2024, plus general corporate purposes.","Offering expected to close Sept 6, 2024; joint book-runners include Barclays, Goldman Sachs, J.P. Morgan, MUFG.","Debentures issued under shelf registration (333-276062-01) with prospectus supplement filed Sept 5, 2024."],"urls":{"canonical":"https://secwatch.observer/filing/0000352541-24-000092","json":"https://secwatch.observer/filing/0000352541-24-000092.json","markdown":"https://secwatch.observer/filing/0000352541-24-000092.md","text":"https://secwatch.observer/filing/0000352541-24-000092.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/352541/000035254124000092/0000352541-24-000092-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/52485/000035254124000092/lnt-20240904.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-31T06:08:18.525694+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"}