# EDGAR Filing Document

**Accession Number:** 0000311094
**File Stem:** 0001171843-25-008001
**Filing Date:** 2025-12
**Character Count:** 7680
**Document Hash:** 4dfe85a7a1c6309e1a87ea4aebeeccfb
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001171843-25-008001.hdr.sgml**: 20251218

**ACCESSION NUMBER**: 0001171843-25-008001

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 14

**CONFORMED PERIOD OF REPORT**: 20251218

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251218

**DATE AS OF CHANGE**: 20251218

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** WESTAMERICA BANCORPORATION
- **CENTRAL INDEX KEY:** 0000311094
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATIONAL COMMERCIAL BANKS [6021]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 942156203
- **STATE OF INCORPORATION:** CA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-09383
- **FILM NUMBER:** 251582790

**BUSINESS ADDRESS:**
- **STREET 1:** 1108 FIFTH AVE
- **CITY:** SAN RAFAEL
- **STATE:** CA
- **ZIP:** 94901
- **BUSINESS PHONE:** (707) 863-6000

**MAIL ADDRESS:**
- **STREET 1:** 4550 MANGELS BLVD
- **STREET 2:** A-2Y
- **CITY:** FAIRFIELD
- **STATE:** CA
- **ZIP:** 94534-4082

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** INDEPENDENT BANKSHARES CORP
- **DATE OF NAME CHANGE:** 19830801

?xml version='1.0' encoding='ASCII'? Form 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

### Washington, D.C. 20549
_________________

### FORM 8-K
_________________

#### CURRENT REPORT

#### Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

#### Date of Report (Date of earliest event reported): December 18, 2025
_______________________________

#### WESTAMERICA BANCORPORATION
(Exact name of registrant as specified in its charter)

_______________________________

---

| | | |
|:---|:---|:---|
| **California** | **001-09383** | **94-2156203** |
| (State or Other Jurisdiction of Incorporation) | (Commission File Number) | (I.R.S. Employer Identification No.) |

---

#### 1108 Fifth Avenue

#### San Rafael, California 94901
(Address of Principal Executive Offices) (Zip Code)

(707) 863-6000

(Registrant's telephone number, including area code)

#### Not Applicable
(Former name or former address, if changed since last report)

_______________________________

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered |
| Common Stock, no par value | WABC | The Nasdaq Stock Market, LLC |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

**Item 8.01. Other Events.**

On December 18, 2025, the Registrant issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

**Item 9.01. Financial Statements and Exhibits.**

<br> [99.1](exh_991.htm) [Press Release dated December 18, 2025](exh_991.htm) <br> 104 Cover Page Interactive Data File (embedded within the Inline XBRL document)

#### SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | **WESTAMERICA BANCORPORATION** | **WESTAMERICA BANCORPORATION** |
| Date: December 18, 2025 | By: | <u>/s/ Anela Jonas&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u> |
|  |  | Anela Jonas |
|  |  | Senior Vice President and Chief Financial Officer |

---

## Exhibit 99.1

**EXHIBIT 99.1**

**Westamerica Bancorporation Announces Stock Repurchase Plan**

SAN RAFAEL, Calif., Dec. 18, 2025 (GLOBE NEWSWIRE) -- The Board of Directors of Westamerica Bancorporation (NASDAQ: WABC) today approved a plan to repurchase, as conditions warrant, up to 2,000,000 shares of the Company's common stock on the open market or in privately negotiated transactions prior to December 31, 2026. The repurchase plan represents approximately 8.0 percent of the Company's common stock outstanding as of September 30, 2025.

Chairman, President and CEO David Payne stated, "This stock repurchase plan recognizes Westamerica's financial strength, conservative risk profile and reliable earnings stream."

Westamerica Bancorporation, through its wholly owned subsidiary, Westamerica Bank, operates banking and trust offices throughout Northern and Central California.

*Westamerica Bancorporation Web Address: <u>www.westamerica.com</u>* <br>

For additional information contact:

Westamerica Bancorporation

1108 Fifth Avenue, San Rafael, CA 94901

Robert A. Thorson – Investment Relations Contact, 707-863-6090

investments@westamerica.com

<u>FORWARD-LOOKING INFORMATION:</u>

The following appears in accordance with the Private Securities Litigation Reform Act of 1995:

This press release may contain forward-looking statements about the Company, including descriptions of plans or objectives of its management for future operations, products or services, and forecasts of its revenues, earnings or other measures of economic performance. Forward-looking statements can be identified by the fact that they do not relate strictly to historical or current facts. They often include the words "believe," "expect," "anticipate," "intend," "plan," "estimate," or words of similar meaning, or future or conditional verbs such as "will," "would," "should," "could," or "may."

Forward-looking statements, by their nature, are subject to risks and uncertainties. A number of factors — many of which are beyond the Company's control — could cause actual conditions, events or results to differ significantly from those described in the forward-looking statements. The Company's most recent reports filed with the Securities and Exchange Commission, including the annual report for the year ended December 31, 2024 filed on Form 10-K and quarterly report for the quarter ended September 30, 2025 filed on Form 10-Q, describe some of these factors, including certain credit, interest rate, operational, liquidity and market risks associated with the Company's business and operations. Other factors described in these reports include changes in business and economic conditions, competition, fiscal and monetary policies, disintermediation, cyber security risks, legislation including the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2011, the Sarbanes-Oxley Act of 2002 and the Gramm-Leach-Bliley Act of 1999, and mergers and acquisitions.

Forward-looking statements speak only as of the date they are made. The Company does not undertake to update forward-looking statements to reflect circumstances or events that occur after the date forward-looking statements are made.