{"schema_version":"secwatch.filing_event.v1","accession":"0001171843-25-000393","form_type":"8-K","ticker":"WABC","cik":"0000311094","company_name":"WESTAMERICA BANCORPORATION","filed_at":"2025-01-23T23:59:59+00:00","discovered_at":"2026-05-14T18:03:05.932823+00:00","generated_at":"2026-05-27T16:53:32.636869+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"high","headline":"Westamerica Bancorporation SVP/Treasurer Thorson retiring; John Sousa appointed","bullets":["John 'Robert' A. Thorson retires as Senior Vice President and Treasurer, effective January 24, 2025, after 35+ years.","John Sousa appointed Senior Vice President and Treasurer, effective January 27, 2025.","Sousa joined Westamerica in July 2024 as VP/Assistant Treasurer; previously 13+ years at Bank of the West."],"urls":{"canonical":"https://secwatch.observer/filing/0001171843-25-000393","json":"https://secwatch.observer/filing/0001171843-25-000393.json","markdown":"https://secwatch.observer/filing/0001171843-25-000393.md","text":"https://secwatch.observer/filing/0001171843-25-000393.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/311094/000117184325000393/0001171843-25-000393-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/311094/000117184325000393/f8k_012325.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-27T16:53:32.636869+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":"81ff923216","claim":"John “Robert” A. Thorson departed as Senior Vice President and Treasurer at WESTAMERICA BANCORPORATION.","evidence_excerpt":"Westamerica Bancorporation announces the retirement of John “Robert” A. Thorson, Senior Vice President and Treasurer, effective January 24, 2025, following over 35 years of service.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/311094/000117184325000393/0001171843-25-000393-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retiring"},{"label":"Role","value":"Senior Vice President and Treasurer"}],"fact_type":"executive_change"},{"claim_id":"fee9755b49","claim":"John Sousa was appointed as Senior Vice President and Treasurer at WESTAMERICA BANCORPORATION.","evidence_excerpt":"Westamerica Bancorporation announces the appointment of John Sousa as Senior Vice President and Treasurer effective January 27, 2025.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/311094/000117184325000393/0001171843-25-000393-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Senior Vice President and Treasurer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}