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, 1996 OR ( ) TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from---------------------to------------------ Commission file number 333-21399 A. Full title of the plan and the address of the plan, if different from that of the issuer named below: Willbros Employees' 401(k) Investment Plan (formerly Willbros USA, Inc. Employees' Investment Plan) 2431 East 61st Street, Suite 700 Tulsa, Oklahoma 74136 B. Name of the issuer of the securities held pursuant to the plan and the address of its principal executive office: Willbros Group, Inc. Edificio Torre Banco Germanico Calle 50 y 55 Este, Apartado 850048 Panama 5, Republic of Panama (50-7) 263-9282 SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Willbros Employees' 401(k) Investment Plan (formerly Willbros USA, Inc. Employees' Investment Plan) has duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized. WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN (formerly Willbros USA, Inc. Employees' Investment Plan) Date: June 27, 1997 By: /s/ Melvin F. Spreitzer --------------------------------- Melvin F. Spreitzer Retirement Plans Committee 2 WILLBROS USA, INC. EMPLOYEES' INVESTMENT PLAN INDEX TO -------------- FINANCIAL STATEMENTS AND SUPPLEMENTAL SCHEDULES - ----------------------------------------------------------------------- Page ------ Independent Auditors' Report 4 - ---------------------------- Financial Statements: - -------------------- Statements of Net Assets Available for Plan Benefits 5 Statements of Changes in Net Assets Available for Plan Benefits 6 Notes to Financial Statements 7-12 Supplemental Schedules - ---------------------- Appendix I - Item 27a - Schedule of Assets Held for Investment Purposes 13 Appendix II - Item 27d - Schedule of Reportable Transactions 14 All other schedules required by the Department of Labor's Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974 are omitted as they are inapplicable or not required. 3 Independent Auditors' Report The Retirement Plans Committee Willbros USA, Inc. Employees' Investment Plan: We have audited the accompanying statements of net assets available for plan benefits of Willbros USA, Inc. Employees' Investment Plan as of December 31, 1996 and 1995 and the related statements of changes in net assets available for plan benefits for the years then ended. 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 generally accepted auditing standards. 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 audits provide 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 plan benefits of the Plan as of December 31, 1996 and 1995 and the changes in net assets available for plan benefits for the years then ended in conformity with generally accepted accounting principles. Our audits were made for the purpose of forming an opinion on the basic financial statements taken as a whole. The supplemental information included in Appendix I and Appendix II is presented for purposes of additional analysis and is not a required part of the basic financial statements but is supplementary information required by the Department of Labor's Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. Such information has been subjected to the auditing procedures applied in the audits of the basic financial statements and, in our opinion, is fairly stated in all material respects in relation to the basic financial statements taken as a whole. KPMG PEAT MARWICK LLP Tulsa, Oklahoma May 9, 1997 4 WILLBROS USA, INC. EMPLOYEES' INVESTMENT PLAN STATEMENTS OF NET ASSETS AVAILABLE FOR PLAN BENEFITS December 31, 1996 and 1995 1996 1995 ---------- ---------- Investments, at fair value: Specially Directed Investment Fund $6,028,589 $5,300,710 Janus Fund's Equity Option 568,682 354,698 Voyageur Asset Management Intermediate Bond Fund 326,415 - American Performance Intermedi