{"filing":{"accession_number":"0000842517-26-000224","cik":"0000842517","ticker":"ISBA","company_name":"ISABELLA BANK CORP","form":"8-K","filing_date":"2026-09-28","report_date":"2026-09-28","primary_document":"isba-20260928.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/842517/000084251726000224/isba-20260928.htm"},"events":[{"id":35479,"run_id":32679,"accession_number":"0000842517-26-000224","anchor_item_number":"8.01","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"summary":"The filing discloses Isabella Bank Corporation's proposed merger with Grand River Commerce, Inc., specifically announcing the mailing of election materials to Grand River shareholders and the election deadline (October 23, 2026) for shareholders to elect the form of consideration (cash, stock, or combination). The merger agreement specifies conversion terms with a per-share cash consideration of approximately $5.71 and an exchange ratio of 0.1413 shares of Isabella common stock. This is a material acquisition activity that would significantly affect both companies' shareholders and is expected to close in Q4 2026.","company_name":"ISABELLA BANK CORP","ticker":"ISBA","filing_date":"2026-09-28","form":"8-K","submitted_at":null,"items":[{"id":39541,"accession_number":"0000842517-26-000224","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 Isabella Bank Corporation's proposed merger with Grand River Commerce, Inc., specifically announcing the mailing of election materials to Grand River shareholders and the election deadline (October 23, 2026) for shareholders to elect the form of consideration (cash, stock, or combination). The merger agreement specifies conversion terms with a per-share cash consideration of approximately $5.71 and an exchange ratio of 0.1413 shares of Isabella common stock. This is a material acquisition activity that would significantly affect both companies' shareholders and is expected to close in Q4 2026.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-28T20:32:32.200203+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":39541,"accession_number":"0000842517-26-000224","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 Isabella Bank Corporation's proposed merger with Grand River Commerce, Inc., specifically announcing the mailing of election materials to Grand River shareholders and the election deadline (October 23, 2026) for shareholders to elect the form of consideration (cash, stock, or combination). The merger agreement specifies conversion terms with a per-share cash consideration of approximately $5.71 and an exchange ratio of 0.1413 shares of Isabella common stock. This is a material acquisition activity that would significantly affect both companies' shareholders and is expected to close in Q4 2026.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-28T20:32:32.200203+00:00","company_name":"ISABELLA BANK CORP","ticker":"ISBA","filing_date":"2026-09-28"}]}