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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

For the quarterly period ended March 31, 2007

OR

For the transition period from              to             

Commission File Number 0-22303

GULF ISLAND FABRICATION, INC.

(Exact name of registrant as specified in its charter)

(985) 872-2100

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of “accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act.

Large Accelerated Filer  ¨    Accelerated Filer  x    Non-Accelerated Filer  ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes  ¨    No  x

The number of shares of the Registrant’s common stock, no par value per share, outstanding at April 26, 2007 was 14,145,833.

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GULF ISLAND FABRICATION, INC.

I N D E X

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PART I. FINANCIAL INFORMATION

GULF ISLAND FABRICATION, INC.

CONSOLIDATED BALANCE SHEETS

The accompanying notes are an integral part of these statements.

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GULF ISLAND FABRICATION, INC.

CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)

( in thousands, except per share data)

The accompanying notes are an integral part of these statements.

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GULF ISLAND FABRICATION, INC.

CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS’ EQUITY (UNAUDITED)

The accompanying notes are an integral part of these statements.

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GULF ISLAND FABRICATION, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

The accompanying notes are an integral part of these statements.

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GULF ISLAND FABRICATION, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

FOR THE THREE MONTH

PERIODS ENDED MARCH 31, 2007 AND 2006

NOTE 1 – ORGANIZATION AND SIGNIFICANT ACCOUNTING PRINCIPLES

Gulf Island Fabrication, Inc., together with its subsidiaries, (the “Company”) is a leading fabricator of offshore drilling and production platforms and other specialized structures used in the development and production of offshore oil and gas reserves. Structures and equipment fabricated by the Company include jackets and deck sections of fixed production platforms; hull and/or deck sections of floating production platforms (such as TLPs, SPARs and FPSOs); piles; wellhead protectors; subsea templates; various production, compressor and utility modules; and offshore living quarters tanks and barges. The Company, with its corporate offices and three major subsidiaries located in Houma, Louisiana, and another major subsidiary located in San Patricio County, Texas, also provides services such as offshore interconnect pipe hook-up; inshore marine construction; manufacture and repair of pressure vessels; heavy lifts such as ship integration and TLP module integration, loading and offloading jack-up drilling rigs, semi-submersible drilling rigs, TLPs, SPARs or other similar cargo; steel warehousing and sales; onshore and offshore scaffolding and piping insulation services. The Company’s principal markets are concentrated in the offshore regions of the Gulf of Mexico. The consolidated financial statements include the accounts of Gulf Island Fabrication, Inc. and its subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three-month period ended March 31, 2007 are not necessarily indicative of the results that may be expected for the year ended December 31, 2007.

The balance sheet at December 31, 2006 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. Certain items in 2006 have been reclassified to conform to the 2007 financial statement presentation. Refer to Note 1 Organization and Summary of Significant Accounting Policies and Note 14 Quarterly Operating Results (Unaudited) included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2006 for information related to the restatement of the 2006 quarterly results.

For further information, refer to the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2006.

NOTE 2 – CONTINGENCIES

In December 2004, the Company received notice from Louisiana Department of Environmental Quality (“LDEQ”) that the Corrective Action Plan submitted in October 2004 was not acceptable. The Corrective Action Plan was developed to provide remediation to several isolated areas located on property the Company sold in 2001. In mid 2005, the LDEQ approved a sampling plan with the

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proposed sampling to begin in September of 2005. Due to the hurricanes that struck the Louisiana coast in 2005, the scheduled sampling was cancelled. In mid October 2006, the sampling was completed. The Company is in the process of scheduling a meeting with LDEQ to discuss the testing results and determine a plan of action. Cost of remediation based on revising the Corrective Action Plan according to LDEQ’s recommendations is not expected to exceed $230,000 and remains unchanged. The Company has included in Accrued Expenses $150,000 which is the current estimated cost to remediate the site.

NOTE 3 – NEW ACCOUNTING STANDARDS

In June 2006, the FASB issued FIN 48—Accounting for Uncertainty in Income Taxes with respect to FASB 109 – Accounting for Income Taxes regarding the accounting for and disclosure of uncertain tax positions. This guidance seeks to reduce the diversity in practice associated with certain aspects of the recognition and measurement related to accounting for uncertainty in tax positions. This interpretation is effective for fiscal years beginning after December 15, 2006. The Company adopted this pronouncement effective January 1, 2007, and has determined the adoption of this new standard does not have a material effect on its consolidated financial position, results of operations or cash flows.

NOTE 4 – LINE OF CREDIT AND NOTES PAYABLE

Effective February 19, 2007, the Company and its lenders entered into the Sixth Amendment to the Ninth Amended and Restated Credit Agreement (the Revolver”) to extend the term of the $50 million Revolver from December 31, 2008 to December 31, 2009. The Revolver is secured by the Company’s real estate, machinery and equipment, and fixtures, and amounts borrowed under the Revolver bear interest, at the Company’s option, at the prime lending rate established by JPMorgan Chase Bank, N.A. or LIBOR plus 1.5%. The Company pays a fee on a quarterly basis of three-sixteenths of one percent per annum on the weighted-average unused portion of the Revolver. At March 31, 2007, no amounts were borrowed under the Revolver, but the Company had letters of credit outstanding totaling $35.5 million, which reduced the unused portion of the Revolver. The increase in the outstanding letters of credit is directly related to the increase in size of the projects the Company is currently fabricating. The Company is required to maintain certain covenants, including balance sheet and cash flow ratios. At March 31, 2007 the Company was in compliance with these covenants.

NOTE 5 – RELATED PARTY TRANSACTIONS

On January 31, 2006, the Company, through an indirect subsidiary, purchased (the “Acquisition”) the facilities, machinery and equipment of Gulf Marine Fabricators, a Texas general partnership (which company changed its name to Aransas Partners after the Acquisition), and an indirect subsidiary of Technip-Colfexip USA Holdings, Inc. (“Technip”). Following the Acquisition, the Company’s indirect subsidiary changed its name to G. M. Fabricators, L.P. d/b/a Gulf Marine Fabricators. As consideration for the Acquisition, the Company paid $40,000,000 in cash and issued 1,589,067 shares (or approximately 11% of its outstanding common stock) to Aransas Partners.

During 2006, the Company was awarded three contracts, with an aggregate value of $14.5 million, from Technip to fabricate various oil and gas industry items for Technip to use with its customers. During 2006, the Company recognized revenue of $1.5 million on these contracts.

During the three months ended March 31, 2007, the value of the Technip contracts increased by $9.4 million to a total aggregate value of $23.9 million. During the three months ended March 31, 2007, the Company recognized revenue of $10.1 million on these contracts.

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Report of Independent Registered

Public Accounting Firm

The Board of Directors and Shareholders

Gulf Island Fabrication, Inc.

We have reviewed the condensed consolidated balance sheet of Gulf Island Fabrication, Inc. as of March 31, 2007, and the related condensed consolidated statements of income and cash flows for the three-month periods ended March 31, 2007 and 2006, and the condensed consolidated statement of changes in shareholders’ equity for the three-month period ended March 31, 2007. These financial statements are the responsibility of the Company’s management.

We conducted our review in accordance with the standards of the Public Company Accounting Oversight Board (United States). A review of interim financial information consists principally of applying analytical procedures, and making inquiries of persons responsible for financial and accounting matters. It is substantially less in scope than an audit conducted in accordance with the standards of the Public Company Accounting Oversight Board, the objective of which is the expression of an opinion regarding the financial statements taken as a whole. Accordingly, we do not express such an opinion.

Based on our review, we are not aware of any material modifications that should be made to the condensed consolidated interim financial statements referred to above for them to be in conformity with U.S. generally accepted accounting principles.

We have previously audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheet of Gulf Island Fabrication, Inc. as of December 31, 2006, and the related consolidated statements of income, changes in shareholders’ equity and cash flows for the year then ended (not presented herein) and in our report dated March 15, 2007, we expressed an unqualified opinion on those consolidated financial statements. In our opinion the information set forth in the accompanying condensed consolidated balance sheet as of December 31, 2006, is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived.

/s/ Ernst & Young LLP

New Orleans, Louisiana

April 26, 2007

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Forward-Looking Statements

Statements under “Backlog”, “Results of Operations” and “Liquidity and Capital Resources” and other statements in this report and the exhibits hereto that are not statements of historical fact are forward-looking statements. These statements are subject to certain risks and uncertainties that could cause actual results and outcomes to differ materially from the results and outcomes predicted in the statement and investors are cautioned not to place undue reliance upon them. Important factors that may cause our actual results to differ materially from expectations or projections include those described under the heading “Cautionary Statements” in Item 1A. Risk Factors included in our Annual Report on Form 10-K for the year ended December 31, 2006. Such factors include, among others, the timing and extent of changes in the prices of crude oil and natural gas; the timing of new projects and our ability to obtain them; competitive factors in the heavy marine fabrication industry; and our ability to attract and retain qualified production employees at acceptable compensation rates.

Critical Accounting Policies and Estimates

The consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States, which require us to make estimates and assumptions (see Note 1 to the consolidated financial statements included in the annual report on Form 10-K for the year ended December 31, 2006). We believe that of our significant accounting policies, revenue recognition involves a higher degree of judgement and complexity. Critical accounting policies are discussed more fully in our Annual Report on Form 10-K for the year ended December 31, 2006. There have been no changes in our evaluation of our critical accounting policies since that date.

Backlog

As of March 31, 2007, we had a revenue backlog of $393.7 million and a labor backlog of approximately 3.7 million man-hours remaining to work, which consists of work remaining at March 31, 2007 and commitments received through the first quarter earnings release issued April 26, 2007, compared to the revenue backlog of $429.1 million and a man-hour backlog of 4.0 million hours reported in our Form 10-K at December 31, 2006.

Of the backlog at March 31, 2007, $376.4 million, or 96%, represented projects destined for deepwater locations compared to $412.0 million, or 96%, of projects destined for deepwater locations in the December 31, 2006 backlog. Included in the backlog destined for deepwater locations are $153.6 million and $164.3 million at March 31, 2007 and December 31, 2006, respectively, related to projects destined for foreign locations.

Of the backlog at March 31, 2007, we expect to recognize revenues of approximately $290.7 million in the remainder of 2007, and approximately $103.0 million in 2008.

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Results of Operations

Our revenue for the three-month period ended March 31, 2007 was $109.4 million, an increase of 92%, compared to $57.0 million in revenue for the three-month period ended March 31, 2006. The increase in revenue for the three-month period ended March 31, 2007 is primarily related to our participation in larger fabrication projects. As reported in our Form 10-K for the year ended December 31, 2006, we acquired Gulf Marine Fabricators effective January 31, 2006, which enabled us to participate in larger projects, the majority of which are destined for deepwater locations. During the three-month period ended March 31, 2007, Gulf Marine contributed fully to our operating results compared to the three-month period ended March 31, 2006, in which Gulf Marine only contributed two months of operations and was operating in a transition mode associated with the acquisition. Also contributing to the increase in revenue was an increase in man-hours worked to 878,000 for the period ended March 31, 2007, compared to 686,000 of man-hours worked for the period ended March 31, 2006. Included in the revenue for the three months ended March 31, 2007, is approximately $4.8 million related to unapproved change orders or claims for extra work.

For the three-month period ended March 31, 2007, gross profit was $8.5 million (7.8% of revenue), compared to gross profit of $4.0 million (7.0% of revenue) for the three-month period ended March 31, 2006. Although the gross profit margin increased slightly, we continue to experience inefficiencies in labor primarily because of our reliance on contract labor to maintain sufficient labor levels to complete the major projects in progress. We continue to negotiate with our customers in an attempt to neutralize additional increases in labor, material and subcontract costs, but we can not ensure that any of these additional costs will be reimbursed.

Our general and administrative expenses were $2.3 million for the three-month period ended March 31, 2007, compared to $2.2 million for the period ended March 31, 2006. As a percentage of revenue, general and administrative expenses decreased to 2.1% from 3.8% of revenue for the three-month period ended March 31, 2006. The absolute dollar increase in general and administrative expenses represents the increases in salaries and wage related cost associated with the increase in production activities. Although we substantially increased our revenue, management effectively monitored our general and administrative costs.

We had net interest income of $108,000 for the three-month period ended March 31, 2007 compared to net interest expense of $52,000 for the three-month period ended March 31, 2006. The change is the result of us maintaining a net positive cash balance without having any long-term debt during the first quarter of 2007 compared to having borrowings against our credit facility related to the acquisition of Gulf Marine during in the first quarter of 2006.

Other Income (Expense) net for the period ended March 31, 2007 was a loss of $4,000 compared to a $983,000 gain for the period of March 31, 2006. The loss for the period ended March 31, 2007 was related to the sale of miscellaneous equipment. The sale of our interest in MinDOC, effective January 23, 2006, generated a gain of $983,000 during the first quarter of 2006.

Our effective income tax rate was 30.0% for the three-month period ended March 31, 2007 compared to 32.5% for the period ended March 31, 2006. The decrease relates primarily to the employment hiring credits available to us in 2007 for both state and federal taxes.

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Liquidity and Capital Resources

Historically we have funded our business activities primarily through cash generated from operations. We also maintain a revolving line of credit with our commercial banks.

Effective February 19, 2007, we entered into the Sixth Amendment to the Ninth Amended and Restated Credit Agreement (the Revolver”) to extend the term of the $50 million Revolver from December 31, 2008 to December 31, 2009. The Revolver is secured by our real estate, machinery and equipment, and fixtures, and amounts borrowed under the Revolver bear interest, at our option, at the prime lending rate established by JPMorgan Chase Bank, N.A. or LIBOR plus 1.5%. We pay a fee on a quarterly basis of three-sixteenths of one percent per annum on the weighted-average unused portion of the Revolver. At March 31, 2007, no amounts were borrowed under the Revolver, but we had letters of credit outstanding totaling $35.5 million, which reduced the unused portion of the Revolver. The increase in the outstanding letters of credit is directly related to the increase in size of the projects we are currently fabricating. We are required to maintain certain covenants, including balance sheet and cash flow ratios. At March 31, 2007, we were in compliance with these covenants.

At March 31, 2007, our cash balance was $15.2 million and working capital was $57.4 million, resulting in a current ratio of 2.1 to 1. Net cash provided by operating activities was $9.4 million for the three-months ended March 31, 2007. Net cash used in investing activities for the three-months ended March 31, 2007, was $3.6 million, which related to capital expenditures for equipment and improvements to our production facilities. Net cash used in financing activities for the three-month period ended March 31, 2007, was $880,000, consisting of $432,000 provided by the exercise of stock options, $109,000 provided by the tax benefit of stock options exercised and $1.4 million used to pay dividends on common stock.

Capital expenditures for the remaining nine months of 2007 are estimated to be approximately $42.7 million, which includes approximately $24 million for the construction of a graving dock, $4 million for the purchase of 6 KAMAG Transporters and the remainder for the purchase of machinery and equipment and additional yard and facility expansion improvements. Management believes that our available funds, cash generated by operating activities and funds available under Revolver will be sufficient to fund our capital expenditures and working capital needs through the end of 2007.

On March 1, 2007, our Board of Directors declared a dividend of $0.10 per share (a 33% increase from the quarterly dividend of $0.075 per share in 2006) on the shares of our common stock outstanding, payable March 26, 2007 to shareholders of record on March 14, 2007. The future declaration and payment of dividends, if any, is at the discretion of the Board of Directors and will depend on our retained earnings, working capital requirements and the future operation and growth of our business and other factors deemed relevant by the Board of Directors.

Contractual Obligations

There have been no material changes from the information included in our Annual Report on Form 10-K for the year ended December 31, 2006.

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Off-Balance Sheet Arrangements

There have been no material changes from the information included in our Annual Report on Form 10-K for the year ended December 31, 2006.

There have been no material changes from the information included in our Annual Report on Form 10-K for the year ended December 31, 2006.

The Company’s management, with the participation of our Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934) as of the end of the period covered by this report. Based on this evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that the design and operation of our disclosure controls and procedures were effective as of such date to provide assurance that information required to be disclosed by the Company in the reports that it files or submits under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the Securities and Exchange Commission, and that such information is accumulated and communicated to management as appropriate to allow timely decisions regarding disclosure.

There have been no changes during the first quarter ended March 31, 2007 in the Company’s internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

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PART II. OTHER INFORMATION

The Company is subject to various routine legal proceedings in the normal conduct of its business primarily involving commercial claims, workers’ compensation claims, and claims for personal injury under general maritime laws of the United States and the Jones Act. While the outcome of these lawsuits, legal proceedings and claims cannot be predicted with certainty, management believes that the outcome of any such proceedings, even if determined adversely, would not have a material adverse effect on the financial position, results of operations or cash flows of the Company.

There have been no material changes from the information included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2006.

Item 6. Exhibits

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SIGNATURES

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 thereunto duly authorized.

Date: April 27, 2007

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GULF ISLAND FABRICATION, INC.

EXHIBIT INDEX

E-1