Exhibit 11
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WESTAMERICA BANCORPORATION
Computation of Earnings Per Share on Common and
Common Equivalent Shares and on Common Shares
Assuming Full Dilution
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For the For the
three months nine months
ended September 30, ended September 30,
(In thousands, except per share data) 2000 1999 2000 1999
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<S> <C> <C> <C> <C>
Weighted average number of common
shares outstanding - basic 36,365 38,266 36,404 38,976
Add exercise of options reduced by the
number of shares that could have been
purchased with the proceeds of such
exercise 541 606 489 625
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Weighted average number of common
shares outstanding - diluted 36,906 38,872 36,893 39,601
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Net income $20,145 $19,289 $59,038 $56,562
Basic earnings per share $0.55 $0.50 $1.62 $1.45
Diluted earnings per share $0.55 $0.50 $1.60 $1.43
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