{"schema_version":"secwatch.filing_event.v1","accession":"0000352541-25-000074","form_type":"8-K","ticker":"LNT","cik":"0000352541","company_name":"ALLIANT ENERGY CORP","filed_at":"2025-09-11T23:59:59+00:00","discovered_at":"2026-05-14T18:02:46.062278+00:00","generated_at":"2026-05-17T06:55:28.024104+00:00","sec_items":["8.01","9.01"],"event_type":"debt","sentiment":"neutral","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"IPL prices $300M 5.600% senior debentures due 2055; proceeds for debt reduction","bullets":["IPL (Alliant Energy subsidiary) priced $300M aggregate principal of 5.600% senior debentures due Oct 1, 2055.","Net proceeds to reduce outstanding receivables purchase program, commercial paper, and general corporate purposes.","Offering expected to close Sept 11, 2025, subject to customary conditions.","Joint book-running managers include KeyBanc, PNC Capital Markets, TD Securities, U.S. Bancorp."],"urls":{"canonical":"https://secwatch.observer/filing/0000352541-25-000074","json":"https://secwatch.observer/filing/0000352541-25-000074.json","markdown":"https://secwatch.observer/filing/0000352541-25-000074.md","text":"https://secwatch.observer/filing/0000352541-25-000074.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/352541/000035254125000074/0000352541-25-000074-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/52485/000035254125000074/lnt-20250908.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T06:55:28.024104+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"}