---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-22-005270"
form_type: "8-K"
ticker: "MBWM"
cik: "0001042729"
company_name: "MERCANTILE BANK CORP"
filed_at: "2022-03-04T23:59:59+00:00"
generated_at: "2026-06-27T01:24:57.719837+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Mercantile Bank SVP & HR Director Lonna Wiersma retires; Brett Hoover named successor

## Summary
- Lonna L. Wiersma, Senior Vice President and Human Resource Director, retired on March 4, 2022, after 23 years of service.
- Brett Hoover, 51, appointed as Human Resource Director; Hoover has been with Mercantile Bank for over 15 years.
- No further details on compensation or transition terms provided in the filing.

## SEC filing metadata
- accession: 0001437749-22-005270
- form_type: 8-K
- ticker: MBWM
- cik: 0001042729
- company_name: MERCANTILE BANK CORP
- filed_at: 2022-03-04T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1042729/000143774922005270/0001437749-22-005270-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1042729/000143774922005270/mbwm20220304_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-22-005270
- JSON: https://secwatch.observer/filing/0001437749-22-005270.json
- Plain text: https://secwatch.observer/filing/0001437749-22-005270.txt

## Key facts
- Executive change
  Brett Hoover was appointed as Human Resource Director at MERCANTILE BANK CORP.
  - Action: appointed
  - Role: Human Resource Director
  source text: Brett Hoover, 51, will fill the role of Human Resource Director of Mercantile Bank.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1042729/000143774922005270/0001437749-22-005270-index.htm
- Executive change
  Lonna L. Wiersma retired as Senior Vice President and Human Resource Director at MERCANTILE BANK CORP.
  - Action: retired
  - Role: Senior Vice President and Human Resource Director
  source text: On March 4, 2022, Lonna L. Wiersma, Senior Vice President and Human Resource Director of Mercantile Bank Corporation and its wholly-owned banking subsidiary, Mercantile Bank, retired.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1042729/000143774922005270/0001437749-22-005270-index.htm

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