---
schema_version: "secwatch.filing_event.v1"
accession: "0001171843-23-006588"
form_type: "8-K"
ticker: "WABC"
cik: "0000311094"
company_name: "WESTAMERICA BANCORPORATION"
filed_at: "2023-11-01T23:59:59+00:00"
generated_at: "2026-06-09T03:28:06.967127+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Director Ronald A. Nelson retires from Westamerica Bancorp board, effective Nov 1, 2023

## Summary
- Ronald A. Nelson retired from the Board effective November 1, 2023.
- He served as Chair of Employee Benefits & Compensation Committee, and on Audit, Compliance, Nominating, and Bank boards.
- Mr. Nelson had been a director since 1988; no disagreement with the company cited.

## SEC filing metadata
- accession: 0001171843-23-006588
- form_type: 8-K
- ticker: WABC
- cik: 0000311094
- company_name: WESTAMERICA BANCORPORATION
- filed_at: 2023-11-01T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/311094/000117184323006588/0001171843-23-006588-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/311094/000117184323006588/f8k_110123.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001171843-23-006588
- JSON: https://secwatch.observer/filing/0001171843-23-006588.json
- Plain text: https://secwatch.observer/filing/0001171843-23-006588.txt

## Key facts
- Executive change
  Ronald A. Nelson retired as Director at WESTAMERICA BANCORPORATION.
  - Action: retired
  - Role: Director
  source text: Effective November 1, 2023, Ronald A. Nelson retired from Westamerica Bancorporation’s (the Company) Board of Directors.
  evidence_url: https://www.sec.gov/Archives/edgar/data/311094/000117184323006588/0001171843-23-006588-index.htm

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