Executive Change

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 _________________   FORM  8-K _________________   CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934   Date of Report (Date of earliest event reported):   March 31, 2023 _______________________________   WESTAMERICA BANCORPORATION (Exact name of registrant as specified in its charter) _______________________________   California 001-09383 94-2156203 (State or Other Jurisdiction of Incorporation) (Commission File Number) (I.R.S. Employer Identification No.)   1108 Fifth Avenue San Rafael , California 94901 (Address of Principal Executive Offices) (Zip Code)   (707)   863-6000 (Registrant's telephone number, including area code)   Not Applicable (Former name or former address, if changed since last report) _______________________________   Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:   ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))   Securities registered pursuant to Section 12(b) of the Act:   Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, no par value WABC The Nasdaq Stock Market, LLC   Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).   Emerging growth company  ☐   If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐         Item 5.02 Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers   Effective March 31, 2023, Jesse Leavitt resigned as Chief Financial Officer of Westamerica Bancorporation.   Effective March 31, 2023, John “Robert” A. Thorson, age 62, was reappointed Chief Financial Officer of Westamerica Bancorporation. Mr. Thorson joined Westamerica Bancorporation in 1989, served as Vice President and Manager of Human Resources from 1995 until 2001, served as Senior Vice President and Treasurer from 2002 until 2005, served as Senior Vice President and Chief Financial Officer from 2005 until 2019, and has served as Senior Vice President and Treasurer since 2019.             SIGNATURE   Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.     WESTAMERICA BANCORPORATION             Date: March 31, 2023 By:  /s/ John “Robert” Thorson             John “Robert” Thorson     Senior Vice President and Chief Financial Officer