X0202 4 2004-04-23 0 0000311094 WESTAMERICA BANCORPORATION WABC 0001201513 PAYNE DAVID L 1 1 0 0 Chairman, President & CEO Common Stock 2004-04-23 4 M 0 7600 15.4583 A 7600 D Common Stock 2004-04-23 4 S 0 7600 49.7 D 0 D Common Stock 2004-04-23 4 M 0 6500 15.4583 A 6500 D Common Stock 2004-04-23 4 S 0 6500 49.66 D 0 D Common Stock 2004-04-23 4 M 0 3000 15.4583 A 3000 D Common Stock 2004-04-23 4 S 0 3000 49.55 D 0 D Common Stock 2004-04-23 4 M 0 2000 15.4583 A 2000 D Common Stock 2004-04-23 4 S 0 2000 49.5 D 0 D Common Stock 2004-04-23 4 M 0 10900 15.4583 A 151666 I by Trust Common Stock 10989.213 I ESOP Common Stock 528837 I Gibson Radio & Publishing Common Stock 459 I by Daughter Common Stock 462 I by Son Non-Qualified Stock Option (right to buy) 15.4583 2004-04-23 4 M 0 10900 0 D 2006-01-24 Common Stock 10900 83750 D Non-Qualified Stock Option (right to buy) 15.4583 2004-04-23 4 M 0 7600 0 D 2006-01-24 Common Stock 7600 76150 D Non-Qualified Stock Option (right to buy) 15.4583 2004-04-23 4 M 0 6500 0 D 2006-01-24 Common Stock 6500 69650 D Non-Qualified Stock Option (right to buy) 15.4583 2004-04-23 4 M 0 3000 0 D 2006-01-24 Common Stock 3000 66650 D Non-Qualified Stock Option (right to buy) 15.4583 2004-04-23 4 M 0 2000 0 D 2006-01-24 Common Stock 2000 64650 D The reporting person is President and CEO of Gibson Radio and Publishing Company and disclaims beneficial ownership of 528,837 shares. Options vest ratably over three years beginning one year from date of grant. The grant date was 01/24/1996. By: David L. Payne 2004-04-26