{"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","discovered_at":"2026-05-14T18:03:31.612791+00:00","generated_at":"2026-06-09T03:28:06.967127+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"high","headline":"Director Ronald A. Nelson retires from Westamerica Bancorp board, effective Nov 1, 2023","bullets":["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."],"urls":{"canonical":"https://secwatch.observer/filing/0001171843-23-006588","json":"https://secwatch.observer/filing/0001171843-23-006588.json","markdown":"https://secwatch.observer/filing/0001171843-23-006588.md","text":"https://secwatch.observer/filing/0001171843-23-006588.txt","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"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-09T03:28:06.967127+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"4496125689","claim":"Ronald A. Nelson retired as Director at WESTAMERICA BANCORPORATION.","evidence_excerpt":"Effective November 1, 2023, Ronald A. Nelson retired from Westamerica Bancorporation’s (the Company) Board of Directors.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/311094/000117184323006588/0001171843-23-006588-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"retired"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}