secwatch.observer — SEC 8-K summary ====================================== Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK) CIK: 0000860413 Form: 8-K Filed at: 2025-06-06T23:59:59+00:00 Accession: 0001104659-25-057359 Event type: debt Sentiment: neutral Materiality: 0.55 Item codes: 7.01, 8.01, 9.01 LLM model: deepseek-v4-flash:cloud@v2 FIBK prices $125M of 7.625% Fixed-to-Floating Subordinated Notes due 2035 ------------------------------------------------------------------------- - 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. Source: EDGAR index: https://www.sec.gov/Archives/edgar/data/860413/000110465925057359/0001104659-25-057359-index.htm Primary doc: https://www.sec.gov/Archives/edgar/data/860413/000110465925057359/tm258437d7_8k.htm HTML page: https://secwatch.observer/filing/0001104659-25-057359 License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer