X0201 4 2003-07-29 0 0000311094 WESTAMERICA BANCORPORATION wabc 0001201513 PAYNE DAVID L 1 1 0 0 Chairman, President and CEO Common Stock 2003-07-29 4 M 0 4500 9.3533 A 77347 D Common Stock 2003-07-29 4 S 0 4500 44.37 D 72847 D Common Stock 2003-07-29 4 M 0 2347 9.3533 A 75194 D Common Stock 2003-07-29 4 S 0 2347 44.42 D 72847 D Common Stock 2003-07-30 4 M 0 4300 10.25 A 77147 D Common Stock 2003-07-30 4 S 0 4300 44.27 D 72847 D Common Stock 2003-07-30 4 M 0 8100 10.25 A 80947 D Common Stock 2003-07-30 4 S 0 8100 44.25 D 72847 D Common Stock 2003-07-30 4 M 0 9400 10.25 A 82247 D Common Stock 2003-07-30 4 S 0 9400 44.26 D 72847 D Common Stock 2003-07-30 4 M 0 147 10.25 A 72994 D Common Stock 2003-07-30 4 S 0 147 44.28 D 72847 D Common Stock 2003-07-30 4 M 0 1400 9.3533 A 74247 D Common Stock 2003-07-30 4 S 0 1400 44.27 D 72847 D common Stock 2003-07-30 4 M 0 1053 9.3533 A 73900 D Common Stock 2003-07-30 4 S 0 1053 44.28 D 72847 D Common Stock 2003-07-30 4 M 0 4800 9.3533 A 77647 D Common Stock 2003-07-30 4 S 0 4800 44.3 D 72847 D Common Stock 2003-07-30 4 M 0 6300 9.3533 A 79147 D Common Stock 2003-07-30 4 S 0 6300 44.26 D 72847 D Common Stock 2003-07-30 4 M 0 30653 10.25 A 63437 I by Trust Common Stock 11001.483 I by ESOP Common Stock 528837 I by Gibson Radio & Publishing Company Common Stock 459 I by Daughter Common Stock 462 I by Son Non-Qualified Stock Option (right to buy) 9.3533 2003-07-29 4 M 0 4500 0 D 1995-01-26 2004-01-26 Common Stock 4500 15900 D Non-Qualified Stock Option (right to buy) 9.3533 2003-07-29 4 M 0 2347 0 D 1995-01-26 2004-01-26 Common Stock 2347 13553 D Non-Qualified Stock Option (right to buy) 9.3533 2003-07-30 4 M 0 1400 0 D 1995-01-26 2004-01-26 Common Stock 1400 12153 D Non-Qualified Stock Option (right to buy) 9.3533 2003-07-30 4 M 0 1053 0 D 1995-01-26 2004-01-26 Common Stock 1053 11100 D Non-Qualified Stock Option (right to buy) 9.3533 2003-07-30 4 M 0 4800 0 D 1995-01-26 2004-01-26 Common Stock 4800 6300 D Non-Qualified Stock Option (right to buy) 9.3533 2003-07-30 4 M 0 6300 0 D 1995-01-26 2004-01-26 Common Stock 6300 0 D Non-Qualified Stock Option (right to buy) 10.25 2003-07-30 4 M 0 30653 0 D 1996-01-25 2005-01-25 Common Stock 30653 43147 D Non-Qualified Stock Option (right to buy) 10.25 2003-07-30 4 M 0 4300 0 D 1996-01-25 2005-01-25 Common Stock 4300 38847 D Non-Qualified Stock Option (right to buy) 10.25 2003-07-30 4 M 0 8100 0 D 1996-01-25 2005-01-25 Common Stock 8100 30747 D Non-Qualified Stock Option (right to buy) 10.25 2003-07-30 4 M 0 9400 0 D 1996-01-25 2005-01-25 Common Stock 9400 21347 D Non-Qualified Stock Option (right to buy) 10.25 2003-07-30 4 M 0 147 0 D 1996-01-25 2005-01-25 Common Stock 147 21200 D Includes adjustments to holdings due to market value changes at 6/30/03 in Westamerica Bancorporation's Tax Deferred Savings/Retirement (ESOP) Plan. The reporting person is President and CEO of Gibson Radio and Publishing Company and disclaims beneficial ownership of 528,837 shares. This option vested ratably over three years beginning one year from date of grant. David L. Payne 2003-07-31