---
schema_version: "secwatch.filing_event.v1"
accession: "0000842517-25-000142"
form_type: "8-K"
ticker: "ISBA"
cik: "0000842517"
company_name: "ISABELLA BANK CORP"
filed_at: "2025-09-02T23:59:59+00:00"
generated_at: "2026-05-17T09:06:27.655926+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Isabella Bank terminates CFO Schaefer; McDonnell named interim CFO

## Summary
- William M. Schaefer terminated as CFO effective Aug 28, 2025; no disagreement on operations or controls.
- Neil McDonnell, President of Isabella Bank, appointed interim CFO; he served as CFO for six years before becoming Bank President in Jan 2024.
- National search for a permanent CFO is underway; McDonnell will continue as Bank President.

## SEC filing metadata
- accession: 0000842517-25-000142
- form_type: 8-K
- ticker: ISBA
- cik: 0000842517
- company_name: ISABELLA BANK CORP
- filed_at: 2025-09-02T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/842517/000084251725000142/0000842517-25-000142-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/842517/000084251725000142/isba-20250828.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000842517-25-000142
- JSON: https://secwatch.observer/filing/0000842517-25-000142.json
- Plain text: https://secwatch.observer/filing/0000842517-25-000142.txt

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