{"schema_version":"secwatch.filing_event.v1","accession":"0000842517-25-000142","form_type":"8-K","ticker":"ISBA","cik":"0000842517","company_name":"ISABELLA BANK CORP","filed_at":"2025-09-02T23:59:59+00:00","discovered_at":"2026-05-14T18:02:46.483757+00:00","generated_at":"2026-05-17T09:06:27.655926+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Isabella Bank terminates CFO Schaefer; McDonnell named interim CFO","bullets":["William M. Schaefer terminated as CFO effective Aug 28, 2025; no disagreement on operations or controls.","Neil McDonnell, President of Isabella Bank, appointed interim CFO; he served as CFO for six years before becoming Bank President in Jan 2024.","National search for a permanent CFO is underway; McDonnell will continue as Bank President."],"urls":{"canonical":"https://secwatch.observer/filing/0000842517-25-000142","json":"https://secwatch.observer/filing/0000842517-25-000142.json","markdown":"https://secwatch.observer/filing/0000842517-25-000142.md","text":"https://secwatch.observer/filing/0000842517-25-000142.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/842517/000084251725000142/0000842517-25-000142-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/842517/000084251725000142/isba-20250828.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T09:06:27.655926+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"}