secwatch.observer — SEC 8-K summary ====================================== Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK) CIK: 0000860413 Form: 8-K Filed at: 2023-11-30T23:59:59+00:00 Accession: 0000860413-23-000190 Event type: other_material Sentiment: neutral Materiality: 0.50 Item codes: 4.01, 9.01 LLM model: deepseek-v4-flash:cloud@v2 First Interstate BancSystem dismisses RSM as auditor, appoints EY for FY2024 ---------------------------------------------------------------------------- - Audit Committee dismissed RSM US LLC on Nov 28, 2023; RSM completes 2023 audit. - No disagreements or reportable events between Company and RSM during 2021-2023. - RSM's 2021 and 2022 audit reports were unqualified with no adverse opinions. - Ernst & Young LLP engaged as new independent auditor for fiscal year ending Dec 31, 2024. - RSM furnished a letter to the SEC agreeing with the Company's disclosures (Exhibit 16.1). Source: EDGAR index: https://www.sec.gov/Archives/edgar/data/860413/000086041323000190/0000860413-23-000190-index.htm Primary doc: https://www.sec.gov/Archives/edgar/data/860413/000086041323000190/fibk-20231128.htm HTML page: https://secwatch.observer/filing/0000860413-23-000190 License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer