Management Change/Compensation (Form 8-K)

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

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.

Westamerica Bancorporation announces the appointment of John Sousa as Senior Vice President and Treasurer effective January 27, 2025. Mr. Sousa joined the Company in July 2024 as Vice President and Assistant Treasurer. Prior to joining the Company, Mr. Sousa was responsible for investment portfolio management, wholesale funding and derivatives execution at Bank of the West for over thirteen years.