---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-25-038454"
form_type: "8-K"
ticker: "MBWM"
cik: "0001042729"
company_name: "MERCANTILE BANK CORP"
filed_at: "2025-12-19T23:59:59+00:00"
generated_at: "2026-05-16T12:30:50.213869+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# EFIN shareholders approve merger with Mercantile Bank; close expected Dec 31, 2025

## Summary
- At special meeting Dec 19, 2025, EFIN shareholders voted to approve merger with Mercantile Bank Corporation.
- Parties anticipate closing the merger on December 31, 2025, subject to satisfaction of closing conditions.
- Merger Agreement originally dated July 22, 2025, amended October 5, 2025.

## SEC filing metadata
- accession: 0001437749-25-038454
- form_type: 8-K
- ticker: MBWM
- cik: 0001042729
- company_name: MERCANTILE BANK CORP
- filed_at: 2025-12-19T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1042729/000143774925038454/0001437749-25-038454-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1042729/000143774925038454/mbwm20251219_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-25-038454
- JSON: https://secwatch.observer/filing/0001437749-25-038454.json
- Plain text: https://secwatch.observer/filing/0001437749-25-038454.txt

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