{"schema_version":"secwatch.filing_event.v1","accession":"0000860413-25-000015","form_type":"8-K","ticker":"FIBK","cik":"0000860413","company_name":"FIRST INTERSTATE BANCSYSTEM INC","filed_at":"2025-02-25T23:59:59+00:00","discovered_at":"2026-05-14T18:03:06.532728+00:00","generated_at":"2026-05-26T05:18:24.663497+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"First Interstate BancSystem announces CFO succession; Mutch to retire, Della Camera to succeed on June 1, 2025","bullets":["Marcy D. Mutch to retire as CFO effective May 31, 2025; will serve as executive advisor through Dec 2025 and consultant through Dec 2026.","David P. Della Camera, current Deputy CFO, appointed CFO effective June 1, 2025; also will be principal financial/accounting officer.","Della Camera's compensation: $500k base salary, 70% STI target, 70% LTI target, per Compensation Committee.","Mutch's transition agreement includes prorated incentive, base salary continuation through Transition Period, and $860k RSU grant for consulting period.","Mutch served as CFO for over a decade, including during 2010 IPO; Della Camera joined in 2021 and has held senior finance roles."],"urls":{"canonical":"https://secwatch.observer/filing/0000860413-25-000015","json":"https://secwatch.observer/filing/0000860413-25-000015.json","markdown":"https://secwatch.observer/filing/0000860413-25-000015.md","text":"https://secwatch.observer/filing/0000860413-25-000015.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/860413/000086041325000015/0000860413-25-000015-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/860413/000086041325000015/fibk-20250220.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-26T05:18:24.663497+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":"0c3bf684cb","claim":"Marcy D. Mutch retired as Chief Financial Officer at FIRST INTERSTATE BANCSYSTEM INC.","evidence_excerpt":"On February 20, 2025, Marcy D. Mutch notified First Interstate BancSystem, Inc. (the “Company”) of her intention to retire as a full-time employee at the end of 2025 and to step down after a transition period as the Company’s Executive Vice President and Chief Financial Officer (“CFO”) effective May 31, 2025 (the “Retirement”).","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/860413/000086041325000015/0000860413-25-000015-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retired"},{"label":"Role","value":"Chief Financial Officer"}],"fact_type":"executive_change"},{"claim_id":"3edb65f1db","claim":"David P. Della Camera was appointed as Chief Financial Officer at FIRST INTERSTATE BANCSYSTEM INC.","evidence_excerpt":"her announced successor, the Company’s current Deputy Chief Financial Officer, David P. Della Camera.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/860413/000086041325000015/0000860413-25-000015-index.htm","confidence":0.7,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Chief Financial Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}