---
schema_version: "secwatch.filing_event.v1"
accession: "0000842517-26-000138"
form_type: "8-K"
ticker: "ISBA"
cik: "0000842517"
company_name: "ISABELLA BANK CORP"
filed_at: "2026-06-12T13:17:09+00:00"
generated_at: "2026-06-12T13:18:06.041578+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Isabella Bank to acquire Grand River Commerce in ~$54.6M cash/stock deal; enters Grand Rapids market

## Summary
- Transaction valued at ~$54.6M; 65% stock / 35% cash mix.
- Grand River had $511.7M assets, $437.9M loans, $438.9M deposits as of Mar 31, 2026; combined pro forma ~$2.8B.
- Per share consideration: ~$5.72 cash or 0.1415 ISBA shares per GNRV share.
- Expected closing Q4 2026, subject to regulatory approvals and Grand River shareholder vote.
- Adds presence in Grand Rapids, MI metro; Isabella will offer wealth management in new market.

## SEC filing metadata
- accession: 0000842517-26-000138
- form_type: 8-K
- ticker: ISBA
- cik: 0000842517
- company_name: ISABELLA BANK CORP
- filed_at: 2026-06-12T13:17:09+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/842517/000084251726000138/0000842517-26-000138-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/842517/000084251726000138/isba-20260612.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000842517-26-000138
- JSON: https://secwatch.observer/filing/0000842517-26-000138.json
- Plain text: https://secwatch.observer/filing/0000842517-26-000138.txt

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