{"schema_version":"secwatch.filing_event.v1","accession":"0000860413-26-000092","form_type":"8-K","ticker":"FIBK","cik":"0000860413","company_name":"FIRST INTERSTATE BANCSYSTEM INC","filed_at":"2026-09-16T18:06:28+00:00","discovered_at":"2026-09-16T18:07:11.491272+00:00","generated_at":"2026-09-16T18:07:16.816815+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"First Interstate BancSystem appoints Jeff Lee as EVP & COO; base salary $480K","bullets":["Employment agreement effective Sept 14, 2026; Lee named Executive VP and Chief Operations Officer of company and bank.","Base salary $480,000/year, payable biweekly, reviewed annually; eligible for incentive comp and benefits.","Severance without cause: 1x base salary plus 1x average bonus (prior 3 years), paid over 12 months; benefits 12 months.","On change in control termination: 2x base salary plus 2x target bonus plus pro-rata bonus, paid over 12 months; benefits 24 months.","12-month non-compete/non-solicitation; extends to 18 months after change in control."],"urls":{"canonical":"https://secwatch.observer/filing/0000860413-26-000092","json":"https://secwatch.observer/filing/0000860413-26-000092.json","markdown":"https://secwatch.observer/filing/0000860413-26-000092.md","text":"https://secwatch.observer/filing/0000860413-26-000092.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000092/0000860413-26-000092-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000092/fibk-20260914.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-09-16T18:07:16.816815+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":"e2bd13331f","claim":"Jeff Lee was appointed as Executive Vice President and Chief Operations Officer at FIRST INTERSTATE BANCSYSTEM INC.","evidence_excerpt":"With the execution of the Employment Agreement, the previously announced appointment of Mr. Lee as Executive Vice President and Chief Operations Officer of the Company and the Bank became effective.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000092/0000860413-26-000092-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Executive Vice President and Chief Operations Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}