============================================================================= 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, 1998 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 2431 East 61st Street, Suite 600 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. Dresdner Bank Building 50th Street, 8th Floor P. O. Box 850048 Panama 5, Republic of Panama Telephone No.: (50-7) 263-9282 ============================================================================= SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Willbros Employees' 401(k) 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 Date: June 29, 1999 By: /s/ Melvin F. Spreitzer --------------------------------------- Melvin F. Spreitzer Retirement Plans Committee 2 WILLBROS EMPLOYEES' 401(k) 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 7-15 Supplemental Schedules: - ---------------------- Line 27a - Schedule of Assets Held for Investment Purposes 16 Line 27d - Schedule of Reportable Transactions 17 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.: We have audited the accompanying statements of net assets available for plan benefits of Willbros Employees' 401(k) Investment Plan as of December 31, 1998 and 1997 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 audits 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. As described in Note 6, the Plan merged with the investment plan of an affiliated entity effective March 1, 1997. Accordingly, the net assets available for Plan benefits were transferred from the affiliated plan. 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, 1998 and 1997 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 Schedules 1 and 2 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 LLP Tulsa, Oklahoma June 11, 1999 4 WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN STATEMENTS OF NET ASSETS AVAILABLE FOR PLAN BENEFITS December 31, 1998 and 1997 1998 1997 ----------- ----------- Investments, at fair value: Specifically Directed Investment Fund $ 6,824,887 $ 7,109,564 The Janus Fund's Equity Option - 2,745,488 FRTC Equity I Fund 4,126,067 - Pacific Investment Management Company Total Return Fund - 582,817 FRTC Fixed Income I Fund 877,497 - American Performance Cash Management Fund - 682,104 Miller, Anderson & Sherrerd Balanced Fund - 3,224,215 FRTC Global Balanced Fund 3,168,373 - Westcore Midco Growth Fund Institutional Equity Fund - 1,587,644 FRTC Small Cap Fund 1,484,723 - Warburg, Pincus International Equity Fund - 824,400 FRTC All International Markets Fund 786,953 - Federated Capital Preservation Fund - 173,557 FRTC Investment Contract Fund 1,093,773 - FRTC Balanced Income Fund 18,281 - FRTC Domestic Conservative Balanced Fund 78,988 - FRTC Aggressive Balanced Fund 288,055 - FRTC Global Equity Fund 154,565 - Company Stock Fund 765,730 528,572 Participant Loan Fund 530,552 588,603 ----------- ----------- 20,198,444 18,046,964 Accrued investment income 7,231 11,378 Cash 87,105 34,661 ----------- ----------- Net assets available for plan benefits $20,292,780 $18,093,003 =========== =========== See accompanying notes to financial statements. 5 WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR PLAN BENEFITS Years ended December 31, 1998 and 1997 1998 1997 ----------- ----------- Additions to net assets attributed to: Investment income: Net appreciation (depreciation) in fair value of investments $ 1,338,793 $ (343,842) Dividends 704,695 1,483,146 Interest 96,850 181,932 ----------- ----------- 2,140,338 1,321,236 Transfer of assets from another plan - 5,823,405 Contributions: Employer 781,321 689,194 Participants 1,621,981 1,736,645 ----------- ----------- 2,403,302 2,425,839 ----------- ----------- Total additions 4,543,640 9,570,480 Deductions from net assets attributed to: Benefits paid to participants 2,201,848 115,988 Forfeitures 63,552 6,088 Trustee and other fees 78,463 4,955 ----------- ----------- Total deductions 2,343,863 127,031 ----------- ----------- Net increase 2,199,777 9,443,449 Net assets available for plan benefits: Beginning of year 18,093,003 8,649,554 ----------- ----------- End of year $20,292,780 $18,093,003 =========== =========== See accompanying notes to financial statements. 6 WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN NOTES TO FINANCIAL STATEMENTS 1. Description of Plan The following description of the Willbros Employees' 401(k) Investment Plan (the "Plan"), formerly the Willbros USA, Inc. Employees' Investment Plan, provides only general information. Participants should refer to the Plan documents for a more complete description of the Plan's provisions. Also, see Note 6 regarding the Plan merger at March 1, 1997. General - The Plan is a defined contribution plan covering all Tulsa office full-time employees of Willbros USA, Inc., all Tulsa office full-time employees of Willbros Engineers, Inc., and all salaried employees of Willbros Energy Services Company (collectively the "Company") who have one year of eligible service. It is subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended ("ERISA"). Contributions - Participants may contribute, by payroll deductions, from 1% to 20% of their compensation to the Plan and allocate these amounts as deferred or taxable contributions. The Company may contribute an amount equal to 100% of each participant's contribution up to a maximum of 5% of their compensation. For the years ended December 31, 1998 and 1997, the Company was contributing up to 4% of participant's compensation in cash, or beginning March 1, 1997, if the participant so elected, up to 5% of compensation in Willbros Group, Inc. common stock. Participant Accounts - Each participant's account is credited with the participant's contributions and the Company contributions. At each valuation date, participants' accounts for each investment option are credited with their share of the net income and gains and charged with losses. The benefit to which a participant is entitled is the benefit that can be provided from the participant's vested account. Under certain circumstances transfers of balances between plans may be made. Vesting - Participants are immediately vested in their voluntary contribution account and their salary reduction account plus actual earnings thereon. Vesting in the Company contribution account is based on years of service earned as follows: 3 years - 50%; 4 years - 75%; and 5 years - 100%. Forfeitures - The portion of a participant's employer contribution that is forfeited because of termination of employment before full vesting is applied to reduce the Company's future contributions. Payment of Plan Benefits - On termination of service, participants may elect to receive a lump-sum amount equal to the vested value of their accounts, or, if vested plan benefits exceed $3,500, defer distribution until age 70 is reached or death occurs. Participants who are age 55 may also withdraw their salary reduction accounts. Hardship withdrawals from salary reduction accounts before age 59-1/2 are also permitted under certain circumstances. Participant Loans - Participants may borrow from the Plan pursuant to Section 408(b)(1) of ERISA. Loans to a participant may not exceed the lesser of 50% of the present value of the nonforfeitable accrued benefit of the participant, the balance of the participant's voluntary and salary reduction contribution accounts plus the vested portion of his or her Company contribution account, or $50,000. The minimum loan is $1,000. Loans are stated at cost, which approximates fair value. 7 WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN NOTES TO FINANCIAL STATEMENTS 1. Description of Plan (Continued) Investment Options - Participants may direct investment of their funds to one or more of the following investment options: Option A: Specifically Directed Investment Fund, Option B: The Frank Russell Investment Contract Fund (previously the American Performance Cash Management Fund and Federal Capital Preservation Fund until March 1, 1998), Option C: The Frank Russell Fixed Income I Fund (previously the Pacific Investment Management Company Total Return Fund until March 1, 1998), Option D: The Frank Russell Balanced Income Fund, Option E: The Frank Russell Domestic Conservative Balanced Fund, Option F: The Frank Russell Global Balanced Fund (previously the Miller, Anderson & Sherrerd Balanced Fund until March 1, 1998), Option G: The Frank Russell Aggressive Balanced Fund, Option H: The Frank Russell Global Equity Fund, Option I: The Frank Russell Equity I Fund (previously the Janus Fund's Equity Option until March 1, 1998), Option J: The Frank Russell All International Markets Fund (previously the Warburg, Pincus International Equity Fund until March 1, 1998), Option K: The Frank Russell Small Cap Fund (previously the Westcore Midco Growth Fund Institutional until March 1, 1998), Option L: Willbros Group, Inc. Common Stock. 2. Summary of Significant Accounting Policies Basis of Presentation - The accompanying financial statements of the Plan have been prepared on an accrual basis. 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 net assets available for plan benefits and changes in net assets available for plan benefits during the reporting period. Actual results could differ from those estimates. Administrative Expenses - Administrative expenses of the Plan (except transaction fees for Option A participants and wire fees for sales of Option I) are paid by the Company. Net Assets Available for Plan Benefits - Net assets available for plan benefits include benefits payable to current participants and those who have withdrawn from the Plan. The annual information return filed with the Internal Revenue Service (Form 5500) requires amounts due to participants who have withdrawn from the Plan to be stated as a liability and a distribution. There were no such benefits payable at December 31, 1998 and 1997. Investments - Investments are held in pooled trust funds and mutual funds and are stated at the Plan's proportionate share of the fair value of the holdings of the pooled trust funds. If available, quoted market prices are used to value investments in mutual funds and other securities. The difference between the current value and the historical cost is reflected as net appreciation and depreciation. Purchases and sales of investments are recorded on a trade date basis, except as explained in Note 5. 3. Plan Termination Although it has not expressed any intent 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. In the event of plan termination, participants will become 100 percent vested in their accounts. 8 WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN NOTES TO FINANCIAL STATEMENTS 4. Tax Status The Plan was established January 1, 1976 under the provisions of ERISA. The Internal Revenue Service has determined that the Plan is qualified under Sections 401(a) and 401(k) of the Internal Revenue Code ("IRC") and that the Plan is exempt from federal income taxes under Section 501(a) which provides that earned income is taxable only upon distribution thereof. A favorable determination letter covering the Plan has been received from the Internal Revenue Service. The Plan has been amended since receiving the determination letter. However, management believes that the Plan is designed and is currently operated within the applicable requirements of the IRC. 5. Investments The Plan's investments and cash are held by BancOklahoma Trust Company and administered under a trust agreement with the Company. The Plan's investment options are managed by Frank Russell Trust Company, which has full discretionary authority for purchase and sale of investments not specifically directed by participants within the approved Plan options; however, the Retirement Plans Committee for the Plan retains the right to change the options available to participants. The following table presents the fair values of investments at December 31, 1998 and 1997. Investments that represent 5% or more of the Plan's net assets are separately identified. 1998 ------------------------ No. of Shares/ Loans or Principal Fair Amount ($) Value ----------- ----------- Specifically Directed Investment Fund: Others N/A $ 6,824,887 The Janus Fund's Equity Option - - FRTC Equity I Fund 115,826 4,126,067 Pacific Investment Management Company Total Return Fund - - FRTC Fixed Income I Fund 52,407 877,497 American Performance Cash Management Fund - - Miller, Anderson & Sherrerd Balanced Fund - - FRTC Global Balanced Fund 124,226 3,168,373 Westcore Midco Growth Fund Institutional Equity Fund - - FRTC Small Cap Fund 102,572 1,484,723 Warburg, Pincus International Equity Fund - - FRTC All International Markets Fund 42,469 786,953 Federated Capital Preservation Fund - - FRTC Investment Contract Fund 52,291 1,093,773 FRTC Balanced Income Fund 1,464 18,281 FRTC Domestic Conservative Balanced Fund 4,126 78,988 FRTC Aggressive Balanced Fund 19,213 288,055 FRTC Global Equity Fund 5,391 154,565 Company Stock Fund 137,647 765,730 Participant Loan Fund 115 530,552 ----------- $20,198,444 =========== 1997 ------------------------ No. of Shares/ Loans or Principal Fair Amount ($) Value ----------- ----------- Specifically Directed Investment Fund: Others N/A $ 7,109,564 The Janus Fund's Equity Option 110,261 2,745,488 FRTC Equity I Fund - - Pacific Investment Management Company Total Return Fund 54,983 582,817 FRTC Fixed Income I Fund - - American Performance Cash Management Fund 682,104 682,104 Miller, Anderson & Sherrerd Balanced Fund 242,970 3,224,215 FRTC Global Balanced Fund - - Westcore Midco Growth Fund Institutional Equity Fund 80,755 1,587,644 FRTC Small Cap Fund - - Warburg, Pincus International Equity Fund 48,466 824,400 FRTC All International Markets Fund - - Federated Capital Preservation Fund 17,356 173,557 FRTC Investment Contract Fund - - FRTC Balanced Income Fund - - FRTC Domestic Conservative Balanced Fund - - FRTC Aggressive Balanced Fund - - FRTC Global Equity Fund - - Company Stock Fund 32,796 528,572 Participant Loan Fund 112 588,603 ----------- $18,046,964 =========== 9 WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN NOTES TO FINANCIAL STATEMENTS 5. Investments (Continued) The following schedule presents the net appreciation (depreciation) in fair value for each investment option for the years ended December 31, 1998 and 1997: 1998 1997 ---------- ---------- Specifically Directed Investment Fund $ 495,320 $ 430,997 The Janus Fund's Equity Option - 288,174 FRTC Equity I Fund 870,650 - Pacific Investment Management Company Total Return Fund - 8,529 FRTC Fixed Income I Fund 71,132 - American Performance Cash Management Fund - - Miller, Anderson & Sherrerd Balanced Fund - (44,220) FRTC Global Balanced Fund 479,344 - Westcore Midco Growth Fund Institutional Equity Fund - (710,557) FRTC Small Cap Fund 95,878 - Warburg, Pincus International Equity Fund - (349,858) FRTC All International Markets Fund 69,308 - Federated Capital Preservation Fund - (12) FRTC Investment Contract Fund 50,590 - FRTC Balanced Income Fund 950 - FRTC Domestic Conservative Balanced Fund 7,256 - FRTC Aggressive Balanced Fund 20,405 - FRTC Global Equity Fund 9,721 - Company Stock Fund (831,761) 33,105 ---------- ---------- $1,338,793 $ (343,842) ========== ========== 10 WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN NOTES TO FINANCIAL STATEMENTS 5. Investments (Continued) The following schedule presents investments held by option at December 31, 1998: Option ---------------------------------- A B C ---------- ---------- ---------- 1998 - ---- Investments, at fair value: Specifically Directed Investment Fund $6,824,887 $ - $ - FRTC Investment Contract Fund - 1,093,773 - FRTC Fixed Income I Fund - - 877,497 FRTC Balanced Income Fund - - - FRTC Domestic Conservative Balanced Fund - - - FRTC Global Balanced Fund - - - FRTC Aggressive Balanced Fund - - - FRTC Global Equity Fund - - - FRTC Equity I Fund - - - FRTC All International Markets Fund - - - FRTC Small Cap Fund - - - Company Stock Fund - - - Participant Loan Fund - - - ---------- ---------- ---------- Total Investments $6,824,887 $1,093,773 $ 877,497 ========== ========== ========== Option ---------------------------------- D E F ---------- ---------- ---------- 1998 - ---- Investments, at fair value: Specifically Directed Investment Fund $ - $ - $ - FRTC Investment Contract Fund - - - FRTC Fixed Income I Fund - - - FRTC Balanced Income Fund 18,281 - - FRTC Domestic Conservative Balanced Fund - 78,988 - FRTC Global Balanced Fund - - 3,168,373 FRTC Aggressive Balanced Fund - - - FRTC Global Equity Fund - - - FRTC Equity I Fund - - - FRTC All International Markets Fund - - - FRTC Small Cap Fund - - - Company Stock Fund - - - Participant Loan Fund - - - ---------- ---------- ---------- Total Investments $ 18,281 $ 78,988 $3,168,373 ========== ========== ========== Option ---------------------------------- G H I ---------- ---------- ---------- 1998 - ---- Investments, at fair value: Specifically Directed Investment Fund $ - $ - $ - FRTC Investment Contract Fund - - - FRTC Fixed Income I Fund - - - FRTC Balanced Income Fund - - - FRTC Domestic Conservative Balanced Fund - - - FRTC Global Balanced Fund - - - FRTC Aggressive Balanced Fund 288,055 - - FRTC Global Equity Fund - 154,565 - FRTC Equity I Fund - - 4,126,067 FRTC All International Markets Fund - - - FRTC Small Cap Fund - - - Company Stock Fund - - - Participant Loan Fund - - - ---------- ---------- ---------- Total Investments $ 288,055 $ 154,565 $4,126,067 ========== ========== ========== Option ---------------------------------- J K L ---------- ---------- ---------- 1998 - ---- Investments, at fair value: Specifically Directed Investment Fund $ - $ - $ - FRTC Investment Contract Fund - - - FRTC Fixed Income I Fund - - - FRTC Balanced Income Fund - - - FRTC Domestic Conservative Balanced Fund - - - FRTC Global Balanced Fund - - - FRTC Aggressive Balanced Fund - - - FRTC Global Equity Fund - - - FRTC Equity I Fund - - - FRTC All International Markets Fund 786,953 - - FRTC Small Cap Fund - 1,484,723 - Company Stock Fund - - 765,730 Participant Loan Fund - - - ---------- ---------- ---------- Total Investments $ 786,953 $1,484,723 $ 765,730 ========== ========== ========== Loan Fund Total ---------- ----------- 1998 - ---- Investments, at fair value: Specifically Directed Investment Fund $ - $ 6,824,887 FRTC Investment Contract Fund - 1,093,773 FRTC Fixed Income I Fund - 877,497 FRTC Balanced Income Fund - 18,281 FRTC Domestic Conservative Balanced Fund - 78,988 FRTC Global Balanced Fund - 3,168,373 FRTC Aggressive Balanced Fund - 288,055 FRTC Global Equity Fund - 154,565 FRTC Equity I Fund - 4,126,067 FRTC All International Markets Fund - 786,953 FRTC Small Cap Fund - 1,484,723 Company Stock Fund - 765,730 Participant Loan Fund 530,552 530,552 ---------- ----------- Total Investments $ 530,552 $20,198,444 ========== =========== 11 WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN NOTES TO FINANCIAL STATEMENTS 5. Investments (Continued) The following schedule presents investments held by option at December 31, 1997: Option ---------------------------------- A B C ---------- ---------- ---------- 1997 - ---- Investments, at fair value: Specifically Directed Investment Fund $7,109,564 $ - $ - American Performance Cash Management Fund - 682,104 - Federated Capital Preservation Fund - 173,557 - Pacific Investment Management Company Total Return Fund - - 582,817 Miller, Anderson & Sherrerd Balanced Fund - - - The Janus Fund's Equity Option - - - Warburg, Pincus International Equity Fund - - - Westcore Midco Growth Fund Institutional - - - Company Stock Fund - - - Participant Loan Fund - - - ---------- ---------- ---------- Total Investments $7,109,564 $ 855,661 $ 582,817 ========== ========== ========== Option ---------------------------------- D E F ---------- ---------- ---------- 1997 - ---- Investments, at fair value: Specifically Directed Investment Fund $ - $ - $ - American Performance Cash Management Fund - - - Federated Capital Preservation Fund - - - Pacific Investment Management Company Total Return Fund - - - Miller, Anderson & Sherrerd Balanced Fund - - 3,224,215 The Janus Fund's Equity Option - - - Warburg, Pincus International Equity Fund - - - Westcore Midco Growth Fund Institutional - - - Company Stock Fund - - - Participant Loan Fund - - - ---------- ---------- ---------- Total Investments $ - $ - $3,224,215 ========== ========== ========== Option ---------------------------------- G H I ---------- ---------- ---------- 1997 - ---- Investments, at fair value: Specifically Directed Investment Fund $ - $ - $ - American Performance Cash Management Fund - - - Federated Capital Preservation Fund - - - Pacific Investment Management Company Total Return Fund - - - Miller, Anderson & Sherrerd Balanced Fund - - - The Janus Fund's Equity Option - - 2,745,488 Warburg, Pincus International Equity Fund - - - Westcore Midco Growth Fund Institutional - - - Company Stock Fund - - - Participant Loan Fund - - - ---------- ---------- ---------- Total Investments $ - $ - $2,745,488 ========== ========== ========== Option ---------------------------------- J K L ---------- ---------- ---------- 1997 - ---- Investments, at fair value: Specifically Directed Investment Fund $ - $ - $ - American Performance Cash Management Fund - - - Federated Capital Preservation Fund - - - Pacific Investment Management Company Total Return Fund - - - Miller, Anderson & Sherrerd Balanced Fund - - - The Janus Fund's Equity Option - - - Warburg, Pincus International Equity Fund 824,400 - - Westcore Midco Growth Fund Institutional - 1,587,644 - Company Stock Fund - - 528,572 Participant Loan Fund - - - ---------- ---------- ---------- Total Investments $ 824,400 $1,587,644 $ 528,572 ========== ========== ========== Loan Fund Total ---------- ----------- 1997 - ---- Investments, at fair value: Specifically Directed Investment Fund $ - $ 7,109,564 American Performance Cash Management Fund - 682,104 Federated Capital Preservation Fund - 173,557 Pacific Investment Management Company Total Return Fund - 582,817 Miller, Anderson & Sherrerd Balanced Fund - 3,224,215 The Janus Fund's Equity Option - 2,745,488 Warburg, Pincus International Equity Fund - 824,400 Westcore Midco Growth Fund Institutional - 1,587,644 Company Stock Fund - 528,572 Participant Loan Fund 588,603 588,603 ---------- ----------- Total Investments $ 588,603 $18,046,964 ========== =========== 12 WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN NOTES TO FINANCIAL STATEMENTS 5. Investments (Continued) The following schedule presents the changes in net assets available for plan benefits by investment option for the year ended December 31, 1998. These amounts are reported on a trade date basis, except where such information was not available. In those instances, the information is reported on a settlement date basis. Option ---------------------------------- A B C ---------- ---------- ---------- <c Net assets available for plan benefits at December 31, 1997 $7,132,150 $ 879,114 $ 582,817 Investment income: Net appreciation (depreciation) in fair value of investments 495,320 50,590 71,132 Dividends 151,513 5,021 - Interest 34,810 6,752 5,582 Employer contributions 13,775 33,564 16,648 Participant contributions 118,985 88,283 50,669 Benefits paid to participants (945,988) (203,412) (5,818) Loans to participants (2,339) (49,346) (3,406) Reinvestment of loan payments 21,826 14,443 8,469 Forfeitures - (1,930) (1,297) Trustee and other fees (8,584) (5,770) (4,828) Transfers (179,346) 363,565 157,529 Transfers of assets from another plan - - - ---------- ---------- ---------- Net assets available for plan benefits at December 31, 1998 $6,832,122 $1,180,874 $ 877,497 ========== ========== ========== Option ---------------------------------- D E F ---------- ---------- ---------- <c) Net assets available for plan benefits at December 31, 1997 $ - $ - $3,224,215 Investment income: Net appreciation (depreciation) in fair value of investments 950 7,256 479,344 Dividends - - - Interest - - - Employer contributions 1,794 1,964 93,424 Participant contributions 2,937 6,369 265,818 Benefits paid to participants (2,603) (1,351) (445,704) Loans to participants - - (80,044) Reinvestment of loan payments 3,658 730 83,866 Forfeitures (67) - (8,231) Trustee and other fees (116) (447) (18,672) Transfers 11,728 64,467 (425,643) Transfers of assets from another plan - - - ---------- ---------- ---------- Net assets available for plan benefits at December 31, 1998 $ 18,281 $ 78,988 $3,168,373 ========== ========== ========== Option ---------------------------------- G H I ---------- ---------- ---------- <c) Net assets available for plan benefits at December 31, 1997 $ - $ - $2,745,488 Investment income: Net appreciation (depreciation) in fair value of investments 20,405 9,721 870,650 Dividends - - 548,149 Interest - - - Employer contributions 12,839 7,158 145,516 Participant contributions 81,399 27,354 482,812 Benefits paid to participants (25,510) (30) (325,862) Loans to participants (171) (2,145) (68,433) Reinvestment of loan payments 4,571 6,334 88,290 Forfeitures (5,759) (30) (14,088) Trustee and other fees (1,491) (737) (24,030) Transfers 201,772 106,940 (322,425) Transfers of assets from another plan - - - ---------- ---------- ---------- Net assets available for plan benefits at December 31, 1998 $ 288,055 $ 154,565 $4,126,067 ========== ========== ========== Option ---------------------------------- J K L ---------- ---------- ---------- <c) Net assets available for plan benefits at December 31, 1997 $ 824,400 $1,587,644 $ 528,572 Investment income: Net appreciation (depreciation) in fair value of investments 69,308 95,878 (831,761) Dividends - 12 - Interest - - - Employer contributions 34,635 63,866 356,138 Participant contributions 157,887 228,362 111,106 Benefits paid to participants (40,479) (133,728) (18,206) Loans to participants (11,588) (46,464) (21,003) Reinvestment of loan payments 35,497 53,988 17,867 Forfeitures (3,476) (13,128) (15,546) Trustee and other fees (4,564) (9,224) - Transfers (274,667) (342,483) 638,563 Transfers of assets from another plan - - - ---------- ---------- ---------- Net assets available for plan benefits at December 31, 1998 $ 786,953 $1,484,723 $ 765,730 ========== ========== ========== Loan Fund Total ---------- ----------- Net assets available for plan benefits at December 31, 1997 $ 588,603 $18,093,003 Investment income: Net appreciation (depreciation) in fair value of investments - 1,338,793 Dividends - 704,695 Interest 49,706 96,850 Employer contributions - 781,321 Participant contributions - 1,621,981 Benefits paid to participants (53,157) (2,201,848) Loans to participants 284,939 - Reinvestment of loan payments (339,539) - Forfeitures - (63,552) Trustee and other fees - (78,463) Transfers - - Transfers of assets from another plan - - ---------- ----------- Net assets available for plan benefits at December 31, 1998 $ 530,552 $20,292,780 ========== =========== 13 WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN NOTES TO FINANCIAL STATEMENTS 5. Investments (Continued) The following schedule presents the changes in net assets available for plan benefits by investment option for the year ended December 31, 1997. These amounts are reported on a trade date basis, except where such information was not available. In those instances, the information is reported on a settlement date basis. Option ---------------------------------- A B C ---------- ---------- ---------- Net assets available for plan benefits at December 31, 1996 $6,051,642 $ 115,837 $ 327,384 Investment income: Net appreciation (depreciation) in fair value of investments 430,997 (12) 8,529 Dividends 310,023 5,761 - Interest 58,515 37,256 43,241 Employer contributions 45,948 33,219 14,180 Participant contributions 352,827 135,472 34,728 Benefits paid to participants (8,475) - (2,571) Loans to participants (67,000) (138,039) (3,748) Reinvestment of loan payments 17,744 23,245 6,207 Forfeitures - (2,654) - Trustee and other fees (1,290) - - Transfers (58,781) 184,258 (32,581) Transfers of assets from another plan - 484,771 187,448 ---------- ---------- ---------- Net assets available for plan benefits at December 31, 1997 $7,132,150 $ 879,114 $ 582,817 ========== ========== ========== Option ---------------------------------- D E F ---------- ---------- ---------- Net assets available for plan benefits at December 31, 1996 $ - $ - $ 841,088 Investment income: Net appreciation (depreciation) in fair value of investments - - (44,220) Dividends - - 503,062 Interest - - - Employer contributions - - 116,162 Participant contributions - - 335,776 Benefits paid to participants - - (76,338) Loans to participants - - (90,685) Reinvestment of loan payments - - 80,726 Forfeitures - - (960) Trustee and other fees - - 230 Transfers - - (111,934) Transfers of assets from another plan - - 1,671,308 ---------- ---------- ---------- Net assets available for plan benefits at December 31, 1997 $ - $ - $3,224,215 ========== ========== ========== Option ---------------------------------- G H I ---------- ---------- ---------- Net assets available for plan benefits at December 31, 1996 $ - $ - $ 587,193 Investment income: Net appreciation (depreciation) in fair value of investments - - 288,174 Dividends - - 157,984 Interest - - - Employer contributions - - 146,331 Participant contributions - - 399,346 Benefits paid to participants - - (8,982) Loans to participants - - (64,481) Reinvestment of loan payments - - 156,799 Forfeitures - - (2,075) Trustee and other fees - - (4,129) Transfers - - (366,570) Transfers of assets from another plan - - 1,455,898 ---------- ---------- ---------- Net assets available for plan benefits at December 31, 1997 $ - $ - $2,745,488 ========== ========== ========== Option ---------------------------------- J K L ---------- ---------- ---------- Net assets available for plan benefits at December 31, 1996 $ 149,302 $ 407,743 $ - Investment income: Net appreciation (depreciation) in fair value of investments (349,858) (710,557) 33,105 Dividends 366,385 139,931 - Interest - - - Employer contributions 45,748 88,742 198,864 Participant contributions 139,165 261,984 77,347 Benefits paid to participants (8,700) (10,922) - Loans to participants (25,476) (44,901) (6,670) Reinvestment of loan payments 36,849 55,381 18,797 Forfeitures (79) - (320) Trustee and other fees 234 - - Transfers (163,280) 341,439 207,449 Transfers of assets from another plan 634,110 1,058,804 - ---------- ---------- ---------- Net assets available for plan benefits at December 31, 1997 $ 824,400 $1,587,644 $ 528,572 ========== ========== ========== Loan Fund Total ---------- ----------- Net assets available for plan benefits at December 31, 1996 $ 169,365 $ 8,649,554 Investment income: Net appreciation (depreciation) in fair value of investments - (343,842) Dividends - 1,483,146 Interest 42,920 181,932 Employer contributions - 689,194 Participant contributions - 1,736,645 Benefits paid to participants - (115,988) Loans to participants 441,000 - Reinvestment of loan payments (395,748) - Forfeitures - (6,088) Trustee and other fees - (4,955) Transfers - - Transfers of assets from another plan 331,066 5,823,405 ---------- ----------- Net assets available for plan benefits at December 31, 1997 $ 588,603 $18,093,003 ========== =========== 14 WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN NOTES TO FINANCIAL STATEMENTS 6. Plan Merger Effective March 1, 1997, the Willbros USA, Inc. Employees' Investment Plan ("WUSA Plan") was merged with the investment plan of an affiliated company, Willbros Engineers, Inc. Employees' Investment Plan ("WEI Plan"), and the combined plan was renamed Willbros Employees' 401(k) Investment Plan. Also effective March 1, 1997, the Plan added Willbros Group, Inc. common stock as an investment option. In addition, at the participant's option, the Company's matching contribution may be made either in cash or Willbros Group, Inc. common stock. Willbros Group, Inc. is the parent company of Willbros USA, Inc. and Willbros Engineers, Inc. The net assets available for plan benefits that were transferred from the WEI Plan were $5,823,405. 7. Year 2000 (unaudited) The Plan could be adversely affected if the computer systems and those of service providers used by the Plan or the Trustee do not properly process and calculate date related information from and after January 1, 2000. This is commonly known as the "Year 2000 Problem." The Company is taking steps that it believes are reasonably designed to address the Year 2000 Problem with respect to the computer systems that are used and to obtain satisfactory assurances that comparable steps are being taken by each of the Plan's other major service providers. At this time, however, there can be no assurance that these steps will be sufficient to avoid any material adverse effect on the Plan's activities and, accordingly, its net assets available for benefits and changes therein. 15 SCHEDULE 1 WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN LINE 27a - SCHEDULE OF ASSETS HELD FOR INVESTMENT PURPOSES December 31, 1998 Identity of Issuer, Borrower, Party-in- Lessor, or Description of Current interest (*) Similar Party Investment Cost Value - ------------ ----------------- ------------------ ----------- ----------- Specifically Funds invested in Directed various equity and Investment interest-bearing Fund securities at the direction of individual participants $ 6,238,144 $ 6,824,887 Frank Russell Equity mutual fund Trust Company invested in Equity I Fund common stocks 3,643,769 4,126,067 Frank Russell Fixed income Trust Company mutual fund Fixed Income I invested in U.S. Fund government bond, U.S. government agency, corporate, and mortgage- related bonds 832,000 877,497 Frank Russell Pooled fund Trust Company invested in other Global various equity and Balanced Fund interest-bearing pooled funds 2,899,589 3,168,373 Frank Russell Aggressive equity Trust Company fund invested Small Cap Fund in common stocks 1,465,126 1,484,723 Frank Russell Mutual fund Trust Company invested in All International international Markets Funds equity investments 822,983 786,953 Frank Russell Mutual fund Trust Company invested in Investment guaranteed Contract Fund investment contracts 1,057,932 1,093,773 Frank Russell Mutual fund Trust Company invested in U.S. Balanced common stocks Income Fund and bonds 17,319 18,281 Frank Russell Mutual fund Trust Company invested in U.S. Domestic common stocks Conservative and bonds Balanced Fund 72,044 78,988 Frank Russell Aggressive equity Trust Company fund invested in Aggressive U.S. and non-U.S. Balanced Fund common stocks 268,648 288,055 Frank Russell Mutual fund Trust Company invested in U.S. Global Equity and non-U.S. Fund common stocks 144,497 154,565 * Company Stock Unitized fund in Fund Willbros Group, Inc. common stock 1,599,004 765,730 * Participant Loans extended to Loan Fund participants maturing in less than 5 years with interest rates ranging from 6% to 9% 530,552 530,552 ----------- ----------- $19,591,607 $20,198,144 =========== =========== 16 SCHEDULE 2 WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN LINE 27d - SCHEDULE OF REPORTABLE TRANSACTIONS Year ended December 31, 1998 Identity of Party Purchase Selling Involved (1) Description of Asset Price Price - ------------ -------------------- ---------- ---------- The Janus Fund's Equity Option $1,027,911 $ - The Janus Fund's Equity Option - 3,624,359 The Janus Fund's Equity Option - 4,530,125 Frank Russell Trust Company Equity I Fund 3,624,359 - Frank Russell Trust Company Equity I Fund 5,024,695 - Frank Russell Trust Company Equity I Fund - 1,169,513 Frank Russell Trust Company Fixed Income I Fund 1,143,353 - Frank Russell Trust Company Fixed Income I Fund - 219,259 American Performance Cash Management Fund 4,490,111 - American Performance Cash Management Fund - 4,830,830 Miller, Anderson & Sherrerd Balanced Fund 326,270 - Miller, Anderson & Sherrerd Balanced Fund - 3,285,037 Miller, Anderson & Sherrerd Balanced Fund - 4,140,142 Frank Russell Trust Company Global Balanced Fund 3,285,037 - Frank Russell Trust Company Global Balanced Fund 4,067,569 - Frank Russell Trust Company Global Balanced Fund - 1,039,455 Westcore Midco Growth Fund Institutional Equity Fund 58,781 - Westcore Midco Growth Fund Institutional Equity Fund - 1,596,594 Westcore Midco Growth Fund Institutional Equity Fund - 1,843,092 Frank Russell Trust Company Small Cap Fund 1,596,594 - Frank Russell Trust Company Small Cap Fund 2,088,615 - Frank Russell Trust Company Small Cap Fund - 601,968 Warburg, Pincus International Equity Fund 44,737 - Warburg, Pincus International Equity Fund - 1,231,150 Frank Russell Trust Company All International Markets Fund 1,028,069 - Frank Russell Trust Company All International Markets Fund - 251,300 Frank Russell Trust Company Investment Contract Fund 1,158,600 - Frank Russell Trust Company Investment Contract Fund 1,960,741 - Frank Russell Trust Company Investment Contract Fund - 817,373 Willbros Common Stock Fund 2,163,586 - Willbros Common Stock Fund - 159,669 (1) All transactions involved BancOklahoma Trust Company, the trustee. Identity Expense of Incurred Party Lease With Involved (1) Description of Asset Rental Transaction - ------------ -------------------- ---------- ----------- The Janus Fund's Equity Option $ - $ - The Janus Fund's Equity Option - - The Janus Fund's Equity Option - - Frank Russell Trust Company Equity I Fund - - Frank Russell Trust Company Equity I Fund - - Frank Russell Trust Company Equity I Fund - - Frank Russell Trust Company Fixed Income I Fund - - Frank Russell Trust Company Fixed Income I Fund - - American Performance Cash Management Fund - - American Performance Cash Management Fund - - Miller, Anderson & Sherrerd Balanced Fund - - Miller, Anderson & Sherrerd Balanced Fund - - Miller, Anderson & Sherrerd Balanced Fund - - Frank Russell Trust Company Global Balanced Fund - - Frank Russell Trust Company Global Balanced Fund - - Frank Russell Trust Company Global Balanced Fund - - Westcore Midco Growth Fund Institutional Equity Fund - - Westcore Midco Growth Fund Institutional Equity Fund - - Westcore Midco Growth Fund Institutional Equity Fund - - Frank Russell Trust Company Small Cap Fund - - Frank Russell Trust Company Small Cap Fund - - Frank Russell Trust Company Small Cap Fund - - Warburg, Pincus International Equity Fund - - Warburg, Pincus International Equity Fund - - Frank Russell Trust Company All International Markets Fund - - Frank Russell Trust Company All International Markets Fund - - Frank Russell Trust Company Investment Contract Fund - - Frank Russell Trust Company Investment Contract Fund - - Frank Russell Trust Company Investment Contract Fund - - Willbros Common Stock Fund - - Willbros Common Stock Fund - - (1) All transactions involved BancOklahoma Trust Company, the trustee. Identify Current of Value of Party Asset on Net Involved Cost of Transaction Gain or (1) Description of Asset Asset Date (Loss) - -------- -------------------- ----------- ----------- ---------- The Janus Fund's Equity Option $ 1,027,911 $ 1,027,911 $ - The Janus Fund's Equity Option 3,196,017 3,624,359 428,342 The Janus Fund's Equity Option 4,031,578 4,530,125 498,547 Frank Russell Trust Company Equity I Fund 3,624,359 3,624,359 - Frank Russell Trust Company Equity I Fund 5,024,695 5,024,695 - Frank Russell Trust Company Equity I Fund 1,151,561 1,169,513 17,952 Frank Russell Trust Company Fixed Income I Fund 1,143,353 1,143,353 - Frank Russell Trust Company Fixed Income I Fund 213,173 219,259 6,086 American Performance Cash Management Fund 4,490,111 4,490,111 - American Performance Cash Management Fund 4,830,830 4,830,830 - Miller, Anderson & Sherrerd Balanced Fund 326,270 326,270 - Miller, Anderson & Sherrerd Balanced Fund 3,027,469 3,285,037 257,568 Miller, Anderson & Sherrerd Balanced Fund 3,829,562 4,140,142 310,580 Frank Russell Trust Company Global Balanced Fund 3,285,037 3,285,037 - Frank Russell Trust Company Global Balanced Fund 4,067,569 4,067,569 - Frank Russell Trust Company Global Balanced Fund 1,018,168 1,039,455 21,287 Westcore Midco Growth Fund Institutional Equity Fund 58,781 58,781 - Westcore Midco Growth Fund Institutional Equity Fund 1,456,349 1,596,594 140,245 Westcore Midco Growth Fund Institutional Equity Fund 1,686,672 1,843,092 156,420 Frank Russell Trust Company Small Cap Fund 1,596,594 1,596,594 - Frank Russell Trust Company Small Cap Fund 2,088,615 2,088,615 - Frank Russell Trust Company Small Cap Fund 623,489 601,968 (21,521) Warburg, Pincus International Equity Fund 44,737 44,737 - Warburg, Pincus International Equity Fund 1,306,234 1,231,150 (75,084) Frank Russell Trust Company All International Markets Fund 1,028,069 1,028,069 - Frank Russell Trust Company All International Markets Fund 273,239 251,300 (21,939) Frank Russell Trust Company Investment Contract Fund 1,158,600 1,158,600 - Frank Russell Trust Company Investment Contract Fund 1,960,741 1,960,741 - Frank Russell Trust Company Investment Contract Fund 802,809 817,373 14,564 Willbros Common Stock Fund 2,163,586 2,163,586 - Willbros Common Stock Fund 190,167 159,669 (30,498) (1) All transactions involved BancOklahoma Trust Company, the trustee. 17 EXHIBIT INDEX ------------- EXHIBIT NUMBER EXHIBIT ------- ------- 23 Independent Auditors' Consent