{"schema_version":"secwatch.filing_event.v1","accession":"0000352541-23-000030","form_type":"8-K","ticker":"LNT","cik":"0000352541","company_name":"ALLIANT ENERGY CORP","filed_at":"2023-03-13T23:59:59+00:00","discovered_at":"2026-05-14T18:03:47.625385+00:00","generated_at":"2026-06-18T04:58:30.053655+00:00","sec_items":["2.03","3.02"],"event_type":"debt","sentiment":"neutral","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Alliant Energy issues $75M additional 3.875% convertible notes due 2026","bullets":["Issued $75M aggregate principal of 3.875% Convertible Senior Notes due 2026 via full exercise of initial purchasers' option.","Net proceeds from the option closing were approximately $73.7M after fees and expenses.","Notes rank senior, unsecured; same indenture and terms as $500M Initial Notes issued March 2, 2023.","Maximum shares issuable upon conversion of Option Notes is 1,457,437 shares of common stock.","Notes sold in private placement under Rule 144A to QIBs; not registered under Securities Act."],"urls":{"canonical":"https://secwatch.observer/filing/0000352541-23-000030","json":"https://secwatch.observer/filing/0000352541-23-000030.json","markdown":"https://secwatch.observer/filing/0000352541-23-000030.md","text":"https://secwatch.observer/filing/0000352541-23-000030.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/352541/000035254123000030/0000352541-23-000030-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/352541/000035254123000030/lnt-20230310.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-18T04:58:30.053655+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":[{"claim_id":"bd02fca4c5abffaf247bcfc7a99f8ce3c1a54843","claim":"ALLIANT ENERGY CORP incurred convertible notes of $75 million with qualified institutional buyers at 3.875% maturing 2026.","evidence_excerpt":"On March 10, 2023, Alliant Energy Corporation (the “ Company ”) issued $75 million aggregate principal amount of 3.875% Convertible Senior Notes due 2026 (the “ Option Notes ”) in a private offering to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the “ Securities Act ”), pursuant to the initial purchasers’ full exercise of their option to purchase such notes, granted in connection with the Company’s previously disclosed offering of $500 million aggregate principal amount of the Company’s 3.875% Convertible Senior Notes due 2026 (the “ Initial Notes ” and, together with the Option Notes, the “ Notes ”), which closed on March 2, 2023.","evidence_source":"SEC 8-K Item 2.03/2.04","evidence_url":"https://www.sec.gov/Archives/edgar/data/352541/000035254123000030/0000352541-23-000030-index.htm","confidence":0.98,"family_label":"Debt Financings","details":[{"label":"Instrument","value":"convertible notes"},{"label":"Principal","value":"$75 million"},{"label":"Counterparty","value":"qualified institutional buyers"},{"label":"Rate","value":"3.875%"},{"label":"Maturity","value":"2026"},{"label":"Event","value":"incurrence"}],"fact_type":"debt_financing"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}