X0303 4 2009-06-22 0000311094 WESTAMERICA BANCORPORATION WABC 0001201516 THORSON JOHN A WESTAMERICA BANCORPORATION 4550 MANGELS BLVD 94534 1 SVP/Chief Financial Officer Common Stock 2009-06-22 5 G 0 E 20 0 A 5507 I By Trust Common Stock 30.2985 D Common Stock 415 I By Daughter R Common Stock 415 I By Daughter S Common Stock 155.239 I Esop These shares were gifted to the reporting person as part of the issuer's award program for all employees that rewards longevity. Shares are gifted to each employee as they reach their tenth anniversary, fifteenth anniversary, etc. /s/John "Robert" A. Thorson 2009-06-23