WESTAMERICA BANCORPORATION

Ticker: WABC CUSIP: 957090103 Class: Common Stock

LOOMIS SAYLES & CO L P's Holding History (CIK: 0000312348)

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

Q3 2017

Shares 59 Value ($000) $4 Avg Close $41.22 Range $37.95 - $46.20

Q2 2017

Shares 59 Value ($000) $3 Avg Close $41.48 Range $38.41 - $44.70

Q1 2017

Shares 59 Value ($000) $3 Avg Close $43.50 Range $40.27 - $48.84

Q4 2016

Shares 59 Value ($000) $4 Avg Close $42.49 Range $35.31 - $49.16

Q3 2016

Shares 118 Value ($000) $6 Avg Close $36.26 Range $34.29 - $38.21

Q3 2015

Shares 106 Value ($000) $5 Avg Close $34.11 Range $30.99 - $37.49

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2017	59	$4	$41.22	$37.95 - $46.20
Q2 2017	59	$3	$41.48	$38.41 - $44.70
Q1 2017	59	$3	$43.50	$40.27 - $48.84
Q4 2016	59	$4	$42.49	$35.31 - $49.16
Q3 2016	118	$6	$36.26	$34.29 - $38.21
Q3 2015	106	$5	$34.11	$30.99 - $37.49