WESTAMERICA BANCORPORATION

Ticker: WABC CUSIP: 957090103 Class: Common Stock

BLAIR WILLIAM & CO/IL's Holding History (CIK: 0000902367)

Note: Option positions (PUT/CALL) are excluded.

Q2 2015
Shares 5,705 Value ($000) $289 Avg Close $32.83 Range $29.86 - $37.32
Q1 2015
Shares 5,650 Value ($000) $244 Avg Close $30.86 Range $28.78 - $34.76
Q4 2014
Shares 7,308 Value ($000) $358 Avg Close $33.70 Range $29.79 - $36.02
Q3 2014
Shares 6,626 Value ($000) $308 Avg Close $33.99 Range $32.17 - $37.33
Q2 2014
Shares 7,027 Value ($000) $367 Avg Close $35.20 Range $33.12 - $38.02
Q1 2014
Shares 7,101 Value ($000) $384 Avg Close $35.67 Range $33.22 - $38.53
Q4 2013
Shares 7,101 Value ($000) $401 Avg Close $36.29 Range $32.69 - $39.26
Q3 2013
Shares 7,400 Value ($000) $368 Avg Close $32.64 Range $30.72 - $34.37
Q2 2013
Shares 7,400 Value ($000) $338 Avg Close $29.77 Range $27.86 - $31.27