{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-120808","form_type":"8-K","ticker":"LNT","cik":"0000352541","company_name":"ALLIANT ENERGY CORP","filed_at":"2025-05-15T23:59:59+00:00","discovered_at":"2026-05-14T18:02:50.945885+00:00","generated_at":"2026-05-21T06:21:02.435467+00:00","sec_items":["1.01","2.03","3.02","8.01","9.01"],"event_type":"debt","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Alliant Energy closes $575M 3.250% convertible notes offering due 2028","bullets":["$575M aggregate principal of 3.250% convertible senior notes due 2028 issued, including full $75M option exercise.","Initial conversion rate 13.1773 shares per $1,000 principal, conversion price ~$75.89/share (27.5% premium).","Net proceeds ~$567M (after discounts) to repay debt, reduce commercial paper, or general corporate purposes.","Notes mature May 30, 2028; interest payable semi-annually starting Nov 30, 2025."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-120808","json":"https://secwatch.observer/filing/0001193125-25-120808.json","markdown":"https://secwatch.observer/filing/0001193125-25-120808.md","text":"https://secwatch.observer/filing/0001193125-25-120808.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/352541/000119312525120808/0001193125-25-120808-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/352541/000119312525120808/d928152d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-21T06:21:02.435467+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"}