{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-25-057359","form_type":"8-K","ticker":"FIBK","cik":"0000860413","company_name":"FIRST INTERSTATE BANCSYSTEM INC","filed_at":"2025-06-06T23:59:59+00:00","discovered_at":"2026-05-14T18:02:51.493594+00:00","generated_at":"2026-05-19T19:14:08.058617+00:00","sec_items":["7.01","8.01","9.01"],"event_type":"debt","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"FIBK prices $125M of 7.625% Fixed-to-Floating Subordinated Notes due 2035","bullets":["Aggregate principal $125M, price 100%; interest fixed at 7.625% until June 2030, then floating at SOFR+398 bps.","Net proceeds ~$123.1M; intended to redeem existing 5.25% Subordinated Notes due 2030 on Aug 15, 2025.","Notes qualify as Tier 2 capital for regulatory purposes; sole book-runner is Keefe, Bruyette & Woods.","Expected closing date June 10, 2025, subject to customary conditions."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-25-057359","json":"https://secwatch.observer/filing/0001104659-25-057359.json","markdown":"https://secwatch.observer/filing/0001104659-25-057359.md","text":"https://secwatch.observer/filing/0001104659-25-057359.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/860413/000110465925057359/0001104659-25-057359-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/860413/000110465925057359/tm258437d7_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-19T19:14:08.058617+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"}