WESTAMERICA BANCORPORATION

Ticker: WABC CUSIP: 957090103 Class: Common Stock

BROWN BROTHERS HARRIMAN & CO's Holding History (CIK: 0000014661)

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

Q2 2021

Shares 12 Value ($000) $1 Avg Close $52.96 Range $48.87 - $55.24

Q1 2021

Shares 12 Value ($000) $1 Avg Close $51.31 Range $45.76 - $56.46

Q1 2017

Shares 163 Value ($000) $9 Avg Close $43.50 Range $40.27 - $48.84

Q4 2016

Shares 163 Value ($000) $10 Avg Close $42.49 Range $35.31 - $49.16

Q3 2016

Shares 163 Value ($000) $8 Avg Close $36.26 Range $34.29 - $38.21

Q2 2016

Shares 163 Value ($000) $8 Avg Close $35.72 Range $33.77 - $38.30

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2021	12	$1	$52.96	$48.87 - $55.24
Q1 2021	12	$1	$51.31	$45.76 - $56.46
Q1 2017	163	$9	$43.50	$40.27 - $48.84
Q4 2016	163	$10	$42.49	$35.31 - $49.16
Q3 2016	163	$8	$36.26	$34.29 - $38.21
Q2 2016	163	$8	$35.72	$33.77 - $38.30