A. Thorson - Jan 26, 2023 Form 4 Insider Report for WESTAMERICA BANCORPORATION (WABC)

Role: SVP/Treasurer
Signature: /s/Jesse Leavitt, attorney-in-fact for Mr. Thorson
Stock symbol: WABC
Transactions as of: Jan 26, 2023
Transactions value $: $1,242,528
Form type: 4
Date filed: 1/30/2023, 02:45 PM
Previous filing: Mar 3, 2022
Next filing: Mar 3, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WABC	Common Stock	Award	$0	+1.95K		$0.00	1.95K	Jan 26, 2023	Direct	F1
holding	WABC	Common Stock						1.19K	Jan 26, 2023	Esop
holding	WABC	Common Stock						12.8K	Jan 26, 2023	By Trust

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	WABC	Non-qualified Stock Option (Right to Buy)	Award	$1.24M	+22.4K		$55.47	22.4K	Jan 26, 2023	Common Stock	22.4K	$55.47	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The Restricted Performance Shares granted in 2020 have vested upon meeting performance criteria.
F2	Options vest ratably over three years beginning one year from date of grant.