Company:  WESTAMERICA BANCORPORATIO ... (WABC)
Form Type:  4
Filing Date:  4/3/2012 
CIK:  0000311094 
Address:  1108 FIFTH AVE 
City, State, Zip:  SAN RAFAEL, California 94901 
Telephone:  (707) 863-6000 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$45.07   		Change: 
-0.40 (-0.88%)  
Trade Time: 
04:00 PM EST   		Market Cap: 
$1.22B
Description of Business
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  FORM 4
    NAME AND TITLE
    NON DERIVATIVE SECURITIES
    DERIVATIVE SECURITIES
    EXPLANATIONS AND REMARKS
    REPORTING OWNERS
    SIGNATURES
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