---
schema_version: "secwatch.filing_event.v1"
accession: "0000842517-26-000227"
form_type: "8-K"
ticker: "ISBA"
cik: "0000842517"
company_name: "ISABELLA BANK CORP"
filed_at: "2026-10-06T20:53:48+00:00"
generated_at: "2026-10-12T16:11:11.716168+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Isabella Bank receives all regulatory approvals for Grand River merger; closing expected Nov 2, 2026

## Summary
- Isabella Bank Corp (Nasdaq: ISBA) says all required regulatory approvals are in hand to complete its merger with Grand River Commerce, Inc. (OTCQX: GNRV).
- Grand River shareholders voted to approve the merger on September 18, 2026.
- Deal is under an Agreement and Plan of Merger dated June 11, 2026 among Isabella, Grand River and 401 Merger Sub, Inc.
- Closing is expected November 2, 2026, subject to satisfaction of customary closing conditions; no deal value or exchange ratio disclosed.
- Isabella cites risks including dilution from issuing additional ISBA shares in the transaction and integration cost/timing uncertainties.

## SEC filing metadata
- accession: 0000842517-26-000227
- form_type: 8-K
- ticker: ISBA
- cik: 0000842517
- company_name: ISABELLA BANK CORP
- filed_at: 2026-10-06T20:53:48+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/842517/000084251726000227/0000842517-26-000227-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/842517/000084251726000227/isba-20261005.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000842517-26-000227
- JSON: https://secwatch.observer/filing/0000842517-26-000227.json
- Plain text: https://secwatch.observer/filing/0000842517-26-000227.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.