{"filing":{"accession_number":"0000842517-26-000222","cik":"0000842517","ticker":"ISBA","company_name":"ISABELLA BANK CORP","form":"8-K","filing_date":"2026-09-21","report_date":"2026-09-21","primary_document":"isba-20260921.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/842517/000084251726000222/isba-20260921.htm"},"events":[{"id":34026,"run_id":31323,"accession_number":"0000842517-26-000222","anchor_item_number":"8.01","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"summary":"The filing discloses shareholder approval of a merger agreement between Isabella Bank Corporation and Grand River Commerce, Inc., involving a multi-step transaction including a merger of Grand River into Isabella and a subsequent bank merger. This constitutes a material acquisition/change of control event. The disclosure explicitly states that \"Grand River shareholders approved the Merger Agreement and the transactions contemplated thereby\" at a special meeting on September 18, 2026, with expected completion in Q4 2026 subject to regulatory approvals.","company_name":"ISABELLA BANK CORP","ticker":"ISBA","filing_date":"2026-09-21","form":"8-K","submitted_at":null,"items":[{"id":37643,"accession_number":"0000842517-26-000222","item_number":"8.01","item_title":"Other Events","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"reasoning":"The filing discloses shareholder approval of a merger agreement between Isabella Bank Corporation and Grand River Commerce, Inc., involving a multi-step transaction including a merger of Grand River into Isabella and a subsequent bank merger. This constitutes a material acquisition/change of control event. The disclosure explicitly states that \"Grand River shareholders approved the Merger Agreement and the transactions contemplated thereby\" at a special meeting on September 18, 2026, with expected completion in Q4 2026 subject to regulatory approvals.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-21T20:32:01.373387+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":37643,"accession_number":"0000842517-26-000222","item_number":"8.01","item_title":"Other Events","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"reasoning":"The filing discloses shareholder approval of a merger agreement between Isabella Bank Corporation and Grand River Commerce, Inc., involving a multi-step transaction including a merger of Grand River into Isabella and a subsequent bank merger. This constitutes a material acquisition/change of control event. The disclosure explicitly states that \"Grand River shareholders approved the Merger Agreement and the transactions contemplated thereby\" at a special meeting on September 18, 2026, with expected completion in Q4 2026 subject to regulatory approvals.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-21T20:32:01.373387+00:00","company_name":"ISABELLA BANK CORP","ticker":"ISBA","filing_date":"2026-09-21"}]}