{"filing":{"accession_number":"0000842517-26-000158","cik":"0000842517","ticker":"ISBA","company_name":"ISABELLA BANK CORP","form":"8-K","filing_date":"2026-06-15","report_date":null,"primary_document":"isba-20260611.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/842517/000084251726000158/isba-20260611.htm"},"events":[{"id":11146,"run_id":9769,"accession_number":"0000842517-26-000158","anchor_item_number":"1.01","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.99,"summary":"Isabella Bank Corporation entered into a definitive Agreement and Plan of Merger with Grand River Commerce, Inc. on June 11, 2026, providing for a multi-step transaction involving the merger of Grand River into Isabella with specified merger consideration (approximately $5.72 per share in cash and 0.1415 Isabella shares per Grand River share in stock). This is a material acquisition requiring regulatory approvals from the Federal Reserve and Michigan Department of Insurance and Financial Services, making it a clear M\u0026A activity disclosure under Item 1.01.","company_name":"ISABELLA BANK CORP","ticker":"ISBA","filing_date":"2026-06-15","form":"8-K","submitted_at":null,"items":[{"id":7660,"accession_number":"0000842517-26-000158","item_number":"1.01","item_title":"Entry into a Material Definitive Agreement.","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.99,"reasoning":"Isabella Bank Corporation entered into a definitive Agreement and Plan of Merger with Grand River Commerce, Inc. on June 11, 2026, providing for a multi-step transaction involving the merger of Grand River into Isabella with specified merger consideration (approximately $5.72 per share in cash and 0.1415 Isabella shares per Grand River share in stock). This is a material acquisition requiring regulatory approvals from the Federal Reserve and Michigan Department of Insurance and Financial Services, making it a clear M\u0026A activity disclosure under Item 1.01.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-15T21:18:06.238717+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":7660,"accession_number":"0000842517-26-000158","item_number":"1.01","item_title":"Entry into a Material Definitive Agreement.","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.99,"reasoning":"Isabella Bank Corporation entered into a definitive Agreement and Plan of Merger with Grand River Commerce, Inc. on June 11, 2026, providing for a multi-step transaction involving the merger of Grand River into Isabella with specified merger consideration (approximately $5.72 per share in cash and 0.1415 Isabella shares per Grand River share in stock). This is a material acquisition requiring regulatory approvals from the Federal Reserve and Michigan Department of Insurance and Financial Services, making it a clear M\u0026A activity disclosure under Item 1.01.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-15T21:18:06.238717+00:00","company_name":"ISABELLA BANK CORP","ticker":"ISBA","filing_date":"2026-06-15"}]}