Page 1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 11-K (Mark One) [X] ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2003 OR [ ] TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _______________ to _______________ Commission file number 001-9383 A. Full title of the plan and the address of the plan, if different from that of the issuer named below: WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) B. Name of issuer of the securities held pursuant to the plan and the address of its principal executive office: Westamerica Bancorporation 1108 Fifth Avenue San Rafael, California 94901 Page 2 WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) FINANCIAL STATEMENTS WITH SUPPLEMENTAL SCHEDULES FOR THE YEARS ENDED DECEMBER 31, 2003, 2002 AND 2001 WITH REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM Page 3 WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) FINANCIAL STATEMENTS WITH SUPPLEMENTAL SCHEDULES For the Years Ended December 31, 2003, 2002 and 2001 TABLE OF CONTENTS Page ---- Independent Registered Public Accounting Firm's Report 4 Financial Statements: Statement of Net Assets Available for Plan Benefits 5 Statement of Changes in Net Assets Available for Plan Benefits 6 Notes to Financial Statements 7-12 Supplemental Schedules: Schedule H, Line 4i - Schedule of Assets Held for Investment Purposes 13-14 Schedule H, Line 4j - Schedule of Reportable Transactions 15 Signatures 16 Exhibit Index 17 Page 4 INDEPENDENT AUDITOR'S REPORT To the Employee Benefits and Compensation Committee of the Board of Directors of Westamerica Bancorporation We have audited the accompanying statement of net assets available for plan benefits of the Westamerica Bancorporation Tax Deferred Savings/Retirement Plan (ESOP) (the "Plan") as of December 31, 2003 and 2002, and the related statement of changes in net assets available for benefits for the years ended December 31, 2003, 2002 and 2001. These financial statements are the responsibility of the Plan's management. Our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits in accordance with auditing standards generally accepted in the United States of America. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audit provides a reasonable basis for our opinion. In our opinion, the financial statements referred to above present fairly, in all material respects, the net assets available for benefits of the Plan at December 31, 2003 and 2002, and the changes in net assets available for benefits for the years ended December 31, 2003, 2002 and 2001, in conformity with accounting principles generally accepted in the United States of America. Our audits were made for the purpose of forming an opinion on the basic financial statements taken as a whole. The supplemental schedules of assets held for investment purposes and reportable transactions, as of and for the year ended December 31, 2003, are presented for the purpose of additional analysis and are not a required part of the basic financial statements, but are supplementary information required by the United States Department of Labor Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. The supplemental schedules are the responsibility of the Plan's management. The supplemental schedules have been subjected to the auditing procedures applied in the audits of the basic financial statements and, in our opinion, are fairly stated in all material respects in relation to the basic financial statements taken as a whole. /s/ Perry-Smith LLP ------------------- April 30, 2004 400 CAPITOL MALL, SUITE 1200, SACRAMENTO, CA 95814 916-441-1000 FAX 916-441-1110 URL WWW.perry-smith.com Page 5 WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) STATEMENT OF NET ASSETS AVAILABLE FOR PLAN BENEFITS December 31, 2003 and 2002 2003 2002 ----------- ------------ ASSETS Cash $ 17,833 $ 16,904 Investments: Westamerica common stock (Notes 3 and 4) 35,081,251 28,608,744 Shares of registered investment companies (mutual funds) (Note 3) 17,268,494 12,695,029 Participant loans (Note 3) 1,154,771 980,609 ------------ ------------ Total investments 53,504,516 42,284,382 ------------ ------------ Receivables: Participant contributions 0 79,557 Employer contributions 0 56,707 Interest 20 52 ------------ ------------ Total receivables 20 136,316 ------------ ------------ Total assets 53,522,369 42,437,602 ------------ ------------ LIABILITIES Accounts payable 0 1,869 Accrued trustee fees 12,782 11,122 ------------ ------------ Total liabilities 12,782 12,991 ------------ ------------ Net assets available for plan benefits $53,509,587 $42,424,611 ============ ============ The accompanying notes are an integral part of these financial statements Page 6 WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR PLAN BENEFITS For the Years Ended December 31, 2003, 2002 and 2001 2003 2002 2001 ----------- ----------- ----------- ADDITIONS Additions (deductions) to net assets attributed to: Investment income: Net appreciation (depreciation) in fair value of investments (Note 3) $ 9,651,775 $(1,859,827) $(4,230,063) Interest 249,478 267,035 352,175 Dividends 724,410 632,186 595,987 Interest on participant loans 68,278 71,718 85,022 ----------- ----------- ----------- Total investment income (loss) 10,693,941 (888,888) (3,196,879) ----------- ----------- ----------- Contributions: Participants 2,269,775 2,234,006 2,045,531 Employer 1,508,203 1,534,153 1,484,303 Participant rollovers 16,877 189,564 93,782 ----------- ----------- ----------- Total contributions 3,794,855 3,957,723 3,623,616 ----------- ----------- ----------- Total additions 14,488,796 3,068,835 426,737 ----------- ----------- ----------- DEDUCTIONS Deductions from net assets attributed to: Benefits paid to participants 3,356,904 4,692,247 5,041,025 Administrative expenses (Note 7) 46,916 44,115 42,661 ----------- ----------- ----------- Total deductions 3,403,820 4,736,362 5,083,686 Net increase (decrease) 11,084,976 (1,667,527) (4,656,949) Net assets available for plan benefits: Beginning of year 42,424,611 44,092,138 48,749,087 ----------- ----------- ----------- End of year $53,509,587 $42,424,611 $44,092,138 =========== =========== =========== The accompanying notes are an integral part of these financial statements Page 7 WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) NOTES TO FINANCIAL STATEMENTS 1. DESCRIPTION OF PLAN The following description of the Westamerica Bancorporation (the "Company") Tax Deferred Savings/Retirement Plan (ESOP) (the "Plan") provides only general information. Participants should refer to the Summary Plan Description and Plan Agreement for a more complete description of the Plan's provisions. General The Plan, formerly called the Westamerica Bancorporation Supplemental Retirement Plan, was established by the Company as a non-contributory profit sharing plan. The Plan was amended to included a salary deferral feature pursuant to section 401(k) of the Internal Revenue Code. Concurrent with the amendment, all existing account balances were invested in either common stock or certificates of deposit of the Company, and all employee accounts were fully vested. The Plan was also amended and restated as an Employee Stock Ownership Plan (ESOP). The Employee benefits and Compensation Committee of the Company's Board of Directors (the "Committee") delegates to the Company's Pension Management Committee, the administration of the Plan. The Committee has the responsibility for the general operation of the Plan, including the resolution of any questions arising under the Plan agreement. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974 (ERISA). Eligibility Employees of the bank who are compensated on a salaried basis become eligible to participate in the plan on the first day of the calendar month coinciding with or following the date the employee completes 90 consecutive days of service with the Company or completes 1,000 service hours in a 12-month consecutive period. Contributions Each year, participants may make salary deferral contributions, through payroll deduction, in any whole percentage up to 25 percent of pretax annual compensation (not to exceed $12,000 in 2003 and $11,000 in 2002). The Company's matching contribution is 100 percent of the participant's elective contribution, up to a maximum of 6 percent of the participant's compensation. Participants may roll over amounts representing distributions from other qualified defined benefit or contribution plans. Participant Accounts Each participant's account is credited with the participant's contribution and the Company's matching contribution. Plan earnings are allocated based on participant account balances, as defined. Certain administrative expenses associated with the Westamerica Common Stock Fund are charged pro-rata based on a participant's holding in that fund. Page 8 WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) NOTES TO FINANCIAL STATEMENTS (Continued) 1. DESCRIPTION OF PLAN (Continued) Payment of Benefits Upon termination of service for any reason, a participant may elect to receive a lump-sum distribution equal to the value in his or her account. Distributions for the value of a participant's account invested in the Westamerica Common Stock Fund stock are made in the form of the Company's common stock plus cash for any fractional shares or, if a participant elects, in cash or an in-kind transfer, as provided by the Plan document. Participants' Investment Options Company matching contributions are invested in the Westamerica Common Stock Fund in accordance with the Plan Document. A participant who has completed 10 Plan years of service and has attained age 55 may elect to direct up to 25% of the Company matching contribution held in Company stock to other investment fund options. Upon enrollment in the Plan, participants may direct employer and participant contributions in whole or in part in any of the following investment fund options: The Westamerica Common Stock Fund, which is invested in the Company's common stock and temporary interest-bearing money market funds. Vanguard 500 Index Fund, which invests in the 500 stocks that make up the unmanaged Standard & Poor's 500 Composite Stock Price Index, a widely recognized benchmark of U.S. stock market performance. Vanguard International Growth Fund, which invests in stocks of high-quality, seasoned companies based outside the United States. Stocks are selected from more than 15 countries. Vanguard LifeStrategy Conservative Growth Fund, which invests in five Vanguard funds: a domestic stock fund, an international stock fund, two bonds funds, and an asset allocation fund. The fund's assets allocation ranges are expected to be 25%-50% stocks, 50%-75% bonds, and 0%-25% cash investments. Vanguard LifeStrategy Growth Fund, which invests in five Vanguard funds: a domestic stock fund, an international stock fund, two bond funds, and an asset allocation fund. The fund's assets allocation ranges are expected to be 65%-90% stocks, 10%-35% bonds and 0%-25% cash investments. Vanguard LifeStrategy Income Fund, which invests in four Vanguard funds: a stock fund, two bond funds, and an asset allocation fund. The fund's assets allocation ranges are expected to be 5%-30% stocks, 70%-95% bonds, and 0%-25% cash investments. Page 9 WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) NOTES TO FINANCIAL STATEMENTS (Continued) 1. DESCRIPTION OF PLAN (Continued) Participants' Investment Options (Continued) Vanguard LifeStrategy Moderate Growth Fund, which invests in four Vanguard funds: a domestic stock fund, an international stock fund, a bond fund, and an asset allocation fund. The fund's assets allocation ranges are expected to be 45%-70% stocks, 30%-55% bonds, and 0%-25% cash investments. Vanguard Morgan Growth Fund, which invests primarily in stocks of large and mid-sized companies that have strong records of growth in sales and earnings or that have performed well during certain market cycles. Vanguard Prime Money Market Fund, which invests in short-term, high-quality money market instruments issued by financial institutions, nonfinancial corporations, the U.S. government, and federal agencies. Vanguard Total Bond Market Index Fund, which invests in bonds that attempt to match the performance of the unmanaged Lehman Brothers Aggregate Bond Index, which is a widely recognized measure of the taxable U.S. bond market. Vanguard Total International Stock Index, which invests in three Vanguard international index funds: a European fund, a Pacific fund, and an emerging markets fund. These funds invest in the stock of companies in more than 30 countries. Vanguard Windsor II Fund, which invests in a diversified group of out-of-favor stocks of large capitalization companies. The stocks selected generally sell at prices below the market average compared to their dividend income and future return potential. Vanguard Extended Market Index Fund, which invests in a broadly diversified portfolio of stocks of small and medium sized companies that are regularly traded on the New York and American Stock Exchanges and NASDAQ over-the-counter market. The portfolio is designed to be representative of the Wilshire 4500 Index. Vanguard Short-Term Federal Fund which invests primarily in short-term securities issued by U.S. government agencies, but may also invest in U.S. Treasury securities and in repurchase agreements backed by U.S. Treasury or federal agency securities. To reduce fluctuations in its share price, the fund will maintain an average maturity of 1 to 3 years. Page 10 WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) NOTES TO FINANCIAL STATEMENTS (Continued) 1. DESCRIPTION OF PLAN (Continued) Loans to Participants The Plan permits participants to borrow from their accounts and allows for hardship withdrawals. Participants may borrow a minimum of $1,000 up to a maximum equal to the lesser of 50 percent of their account balance, 100 percent of participant contributions, or $50,000. The loans bear interest at rates that range from 5.00% to 9.75%, which are commensurate with local prevailing rates. Loan terms range from 1 to 5 years. Vesting Participants are immediately vested in their salary-deferral contributions, the Company's matching contribution and actual earnings thereon. Voting Rights Each participant is entitled to exercise voting rights attributable to the shares allocated to his or her account and is notified by the Trustee prior to the time that such rights are to be exercised. The Trustee is not permitted to vote any allocated share for which instructions have not been given by a participant. 2. SUMMARY OF ACCOUNTING POLICIES Basis of Accounting The financial statements of the Plan are prepared under the accrual method of accounting. Investment Valuation and Income Recognition The Plan's investments are stated at fair value. Shares of registered investment companies (mutual funds) are reported at fair value based on the quoted market price of the fund, which represents the net asset value of shares held by the Plan at year end. The Company's common stock is valued at its quoted market price. Loans to participants are reported at cost which approximates fair value. Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded on the accrual basis and dividends are recorded on the ex-dividend date. Investment gains and losses are determined based on revalued cost. Revalued cost represents the market value of the assets at the beginning of the plan year or historical cost if an investment was acquired during the plan year. Page 11 WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) NOTES TO FINANCIAL STATEMENTS (Continued) 2. SUMMARY OF ACCOUNTING POLICIES (Continued) Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities and changes therein, and disclosure of contingent assets and liabilities. Actual results could differ from those estimates. Payment Benefits Benefits are recorded when paid. There were no participants who elected to withdraw from the Plan who had not received a distribution at December 31, 2003 and 2002. Administrative Expenses Certain administrative functions are performed by officers or employees of the Company. No such officers or employees receive compensation from the Plan. The Company pays the Plan's annual account maintenance fees for active employees and other administrative expenses. 3. INVESTMENTS The Plan's investments, including investments bought, sold, and held during the year, appreciated in value by $9,651,775 during 2003 and depreciated in value by $1,859,827 and $4,230,063 during 2002 and 2001, respectively, as follows: 2003 2002 2001 ------------ ------------ ------------ Westamerica common stock $6,988,077 $ 483,400 $(2,629,813) Mutual funds 2,663,698 (2,343,227) (1,600,250) ------------ ------------ ------------ $9,651,775 $(1,859,827) $(4,230,063) ============ ============ ============ The following table presents investments at fair value that represent 5% or more of the Plan's net assets as of December 31, 2003 and 2002: 2003 2002 ------------ ------------ Westamerica Common Stock Fund $35,081,251 $28,608,744 Vanguard 500 Index Fund 4,851,183 3,899,771 Vanguard Prime Money Market Fund 2,712,196 2,550,168 Other investments 10,859,886 7,225,699 ------------ ------------ $53,504,516 $42,284,382 ============ ============ Page 12 WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) NOTES TO FINANCIAL STATEMENTS (Continued) 4. INVESTMENT IN WESTAMERICA BANK COMMON STOCK The Plan's investments at December 31, 2003 and 2002 in Westamerica Bank common stock are as follows: 2003 2002 ------------ ------------ Participant directed: Number of shares 705,860 712,015 ============ ============ Cost $15,200,542 $14,053,530 ============ ============ Fair value $35,081,251 $28,608,744 ============ ============ 5. TAX STATUS The Internal Revenue Service has determined and informed the Company by a letter dated December 12, 2001, that the Plan is qualified and the trust established under the Plan is tax-exempt, under the appropriate sections of the Internal Revenue Code. The Plan has been amended since receiving the determination letter; however, the Plan Administrator believes the Plan is designed and is being operated in compliance with the applicable requirements of the Internal Revenue Code. 6. PLAN TERMINATION Although it has not expressed any interest to do so, the Company has the right under the Plan to discontinue its contributions at any time and to terminate the Plan, subject to the provisions of ERISA. 7. RELATED PARTY TRANSACTIONS Plan investments are shares of mutual funds managed by an affiliate of Vanguard Fiduciary Trust Company (VFTC). VFTC is the trustee as defined by the Plan and, therefore, these transactions qualify as party-in-interest transactions which are exempt from the prohibited transactions rules. Fees paid by the Plan for trustee services in connection with the Westamerica Common Stock Fund for the years ended December 31, 2003, 2002 and 2001 amounted to $46,916, $44,115 and $42,661, respectively. Page 13 SUPPLEMENTAL SCHEDULE WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) EMPLOYER IDENTIFICATION NUMBER: 94-2156203 PLAN NUMBER: 002 SCHEDULE H, LINE 4i - SCHEDULE OF ASSETS HELD FOR INVESTMENT PURPOSES December 31, 2003 (c) (b) Description of Investment Identity of Issuer, Including Maturity Date, (e) Borrower, Lessor, Rate of Interest, Collateral, (d) Current (a) or Similar Party Par or Maturity Value Cost Value ----- -------------------- ------------------------------ ----------- ---------- * Westamerica Common Mutual Fund Stock Fund 705,860 shares $15,200,542 $35,081,251 * Vanguard 500 Index Fund Mutual Fund 47,250 shares 5,258,748 4,851,183 * Vanguard International Mutual Fund Growth Fund 19 shares 223 300 * Vanguard LifeStrategy Mutual Fund Conservative Growth Fund 60,532 shares 862,569 880,130 * Vanguard LifeStrategy Mutual Fund Growth Fund 93,380 shares 1,711,475 1,695,782 * Vanguard LifeStrategy Mutual Fund Income Fund 37,476 shares 481,985 494,684 * Vanguard LifeStrategy Mutual Fund Moderate Growth Fund 93,642 shares 1,516,416 1,555,396 * Vanguard Morgan Growth Mutual Fund Fund 163,352 shares 2,798,131 2,429,046 * Vanguard Prime Money Mutual Fund Market Fund 2,712,196 shares 2,712,196 2,712,196 * Vanguard Total Bond Market Mutual Fund Index Fund 77,507 shares 787,779 799,098 * Vanguard Total International Mutual Fund Stock Index Fund 97,040 shares 897,585 1,032,504 * Vanguard Windsor II Fund Mutual Fund 18,980 shares 443,032 502,783 * Vanguard Extended Market Mutual Fund Index Fund 7,524 shares 177,225 200,602 Page 14 WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) EMPLOYER IDENTIFICATION NUMBER: 94-2156203 PLAN NUMBER: 002 (Continued) SCHEDULE H, LINE 4i - SCHEDULE OF ASSETS HELD FOR INVESTMENT PURPOSES December 31, 2003 (c) (b) Description of Investment Identity of Issuer, Including Maturity Date, (e) Borrower, Lessor, Rate of Interest, Collateral, (d) Current (a) or Similar Party Par or Maturity Value Cost Value ----- -------------------- ------------------------------ ----------- ---------- * Vanguard Short Term Mutual Fund Federal Fund 10,850 shares $ 115,378 $ 114,790 * Participant Loans Interest rates ranging from 5.00% to 9.75% 1,154,771 1,154,771 ----------- ----------- $34,118,055 $53,504,516 =========== =========== * Party-in-interest to the Plan Page 15 WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) EMPLOYER IDENTIFICATION NUMBER: 94-2156203 PLAN NUMBER: 002 SCHEDULE H, LINE 4j - SCHEDULE OF REPORTABLE TRANSACTIONS For the Year Ended December 31, 2003 (h) (f) Current (a) Expense Value Identity of (b) (c) (d) (e) Incurred (g) of Asset on (I) Party Description Purchase Selling Lease With Cost of Transaction Net Gain Involved of Asset Price Price Rental Transaction Asset Date or (Loss) ------------- ----------- ---------- ---------- ------ ----------- ---------- ---------- ---------- Category (I) ------------- Purchases - Series of Transactions ------------- Westamerica Bancorporation: Westamerica Common Stock Common Stock $3,015,672 $3,015,672 Sales - Series of Transactions ------------- Westamerica Bancorporation: Westamerica Common Stock Common Stock $3,483,220 $1,881,458 $3,483,220 $1,601,762 Page 16 Duly Authorized Signature Pursuant to the requirements of the Securities Exchange Act of 1934, the trustees (or the persons who administer the employee benefit plan) have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized. WESTAMERICA BANCORPORATION TAX DEFERRED SAVINGS/RETIREMENT PLAN (ESOP) Date: June 21, 2004 ------------------------- By: /s/ Dennis R. Hansen ------------------------- Dennis R. Hansen Senior Vice President and Controller and Member, Pension Management Committee Page 17 Exhibit Index Exhibit Number Description -------- ------------------------------------------------ 23 Independent Auditor's Consent 99 Certification pursuant to 18 U.S.C. Section 1350