X0303 4 2008-07-25 0 0000311094 WESTAMERICA BANCORPORATION WABC 0001201513 PAYNE DAVID L 1 1 0 0 Chairman, President & CEO Common Stock 2008-07-25 4 M 0 100 34.5625 A 39689 D Common Stock 2008-07-25 4 S 0 100 50.97 D 39589 D Common Stock 2008-07-25 4 M 0 100 34.5625 A 39689 D Common Stock 2008-07-25 4 S 0 100 50.965 D 39589 D Common Stock 2008-07-25 4 M 0 1000 34.5625 A 40589 D Common Stock 2008-07-25 4 S 0 1000 50.96 D 39589 D Common Stock 2008-07-25 4 M 0 100 34.5625 A 39689 D Common Stock 2008-07-25 4 S 0 100 50.94 D 39589 D Common Stock 2008-07-25 4 M 0 200 34.5625 A 39789 D Common Stock 2008-07-25 4 S 0 200 50.92 D 39589 D Common Stock 2008-07-25 4 M 0 200 34.5625 A 39789 D Common Stock 2008-07-25 4 S 0 200 50.915 D 39589 D Common Stock 2008-07-25 4 M 0 100 34.5625 A 39689 D Common Stock 2008-07-25 4 S 0 100 50.91 D 39589 D Common Stock 2008-07-25 4 M 0 100 34.5625 A 39689 D Common Stock 2008-07-25 4 S 0 100 50.9 D 39589 D Common Stock 2008-07-25 4 M 0 300 34.5625 A 39889 D Common Stock 2008-07-25 4 S 0 300 50.89 D 39589 D Common Stock 2008-07-25 4 M 0 156 34.5625 A 39745 D Common Stock 2008-07-25 4 S 0 156 50.86 D 39589 D Non-Qualified Stock Option (right to buy) 34.5625 2008-07-25 4 M 0 100 0 D 2000-01-28 2009-01-28 Common Stock 100 23777 D Non-Qualified Stock Option (right to buy) 34.5625 2008-07-25 4 M 0 100 0 D 2000-01-28 2009-01-28 Common Stock 100 23677 D Non-Qualified Stock Option (right to buy) 34.5625 2008-07-25 4 M 0 1000 0 D 2000-01-28 2009-01-28 Common Stock 1000 22677 D Non-Qualified Stock Option (right to buy) 34.5625 2008-07-25 4 M 0 100 0 D 2000-01-28 2009-01-28 Common Stock 100 22577 D Non-Qualified Stock Option (right to buy) 34.5625 2008-07-25 4 M 0 200 0 D 2000-01-28 2009-01-28 Common Stock 200 22377 D Non-Qualified Stock Option (right to buy) 34.5625 2008-07-25 4 M 0 200 0 D 2000-01-28 2009-01-28 Common Stock 200 22177 D Non-Qualified Stock Option (right to buy) 34.5625 2008-07-25 4 M 0 100 0 D 2000-01-28 2009-01-28 Common Stock 100 22077 D Non-Qualified Stock Option (right to buy) 34.5625 2008-07-25 4 M 0 100 0 D 2000-01-28 2009-01-28 Common Stock 100 21977 D Non-Qualified Stock Option (right to buy) 34.5625 2008-07-25 4 M 0 300 0 D 2000-01-28 2009-01-28 Common Stock 300 21677 D Non-Qualified Stock Option (right to buy) 34.5625 2008-07-25 4 M 0 156 0 D 2000-01-28 2009-01-28 Common Stock 156 21521 D Options vest ratebly over three years beginning one year from date of grant. This is filing #5 of 11 filings for this reporting person for this date. /s/ David L. Payne 2008-07-29