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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

For the quarterly period ended June 30, 2011

OR

For the transition period from            to             

Commission File Number 001-34279

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 has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

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

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 as of August 1, 2011 was 14,352,380.

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GULF ISLAND FABRICATION, INC.

I N D E X

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PART I. FINANCIAL INFORMATION

Item 1. Financial Statements.

GULF ISLAND FABRICATION, INC.

CONSOLIDATED BALANCE SHEETS

The accompanying notes are an integral part of these financial statements.

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GULF ISLAND FABRICATION, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)

( in thousands, except per share data)

The accompanying notes are an integral part of these financial 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 financial statements.

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GULF ISLAND FABRICATION, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

The accompanying notes are an integral part of these financial statements.

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GULF ISLAND FABRICATION, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

FOR THE THREE-MONTH AND SIX-MONTH

PERIODS ENDED JUNE 30, 2011 AND 2010

NOTE 1 – ORGANIZATION AND SIGNIFICANT ACCOUNTING PRINCIPLES

Gulf Island Fabrication, Inc. (hereinafter the “Company”, “we” or “our”), serves as a holding company and conducts all of its operations through its subsidiaries, which include Gulf Island, L.L.C. and Gulf Marine Fabricators, L.P. (both performing fabrication of offshore drilling and production platforms and other specialized structures used in the development and production of oil and gas reserves), Gulf Island Marine Fabricators, L.L.C. (performing marine fabrication and construction services), Dolphin Services, L.L.C. (performing offshore and onshore fabrication and construction services), Dolphin Steel Sales, L.L.C. (selling steel plate and other steel products) and Gulf Island Resources, L.L.C. (hiring of laborers with similar rates and terms as those provided by contract labor service companies). Our corporate offices and five of our major subsidiaries are located in Houma, Louisiana, with another major subsidiary located in south Texas. Our principal markets are concentrated in the offshore regions and along the coast of the Gulf of Mexico. The consolidated financial statements include the accounts of Gulf Island Fabrication, Inc. and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

Structures and equipment fabricated by us include jackets and deck sections of fixed production platforms; hull, tendon, and/or deck sections of floating production platforms (such as TLPs, SPARs, FPSOs and MinDOCs); piles; wellhead protectors; subsea templates; various production, processing, compressor and utility modules; offshore living quarters; brown water towboats; barges; lift boats; offshore support vessels and mid-body sections for offshore supply vessels. We also provide 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. For definitions of certain technical terms contained in this Form 10-Q, see the Glossary of Certain Technical Terms contained in our Annual Report on Form 10-K for the year ended December 31, 2010.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. 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 U.S. generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three-month and six-month periods ended June 30, 2011 are not necessarily indicative of the results that may be expected for the year ended December 31, 2011.

The balance sheet at December 31, 2010 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.

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, 2010.

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NOTE 2 – CONTRACT RECEIVABLES AND RETAINAGE

On January 14, 2011, we entered into an agreement with one of our customers regarding the collection of an $11.0 million retainage balance on a completed contract. As consideration to extend payment, we agreed to receive $12.5 million, payable in twenty equal monthly installments beginning on June 30, 2011. Since the payment period extends further than twelve months, we discounted the final contract price by $1.4 million, applying a discount rate of 9.5%, based on our credit risk analysis. We began recognizing the discount as interest income over the twenty month term beginning June 30, 2011, which is consistent with the first scheduled payment of the contract retainage under the original contract. As a result of this financing agreement, we reclassified the remaining scheduled payments, net of discount, from contract retainage to current and long-term contracts receivables.

NOTE 3 – OTHER RECEIVABLES

As of December 31, 2010, we had previously recorded $5.9 million, net of advances received from our insurance provider, in “Other receivables” related to an insurance claim for costs incurred in connection with an April 2008 accident at our Texas facility involving four cranes. During 2009, our insurer disputed certain aspects of this claim, and a hearing was ultimately held in January 2011 concerning this matter. On April 8, 2011, we received an unfavorable ruling regarding this claim. As a result, in March 2011 we recognized all recorded amounts as asset impairments of $7.7 million, of which $5.9 million related to disputed crane rental costs and $1.8 million related to the remaining net book value of one of the cranes involved in the accident that is now deemed a total loss. We have filed an appeal and intend to continue to pursue this matter through legal proceedings as we believe we are owed the amounts related to our claim; however, no assurance can be made as to the final outcome of our appeal.

NOTE 4 – LINE OF CREDIT

Effective May 31, 2011, we extended the term of our $60 million revolving credit facility (the “Revolver”) from December 31, 2012 to December 31, 2013. All other terms of our Revolver remain unchanged. Our Revolver is secured by our real estate, machinery and equipment, and fixtures. 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 percent. We pay a fee on a quarterly basis of one-fourth of one percent per annum on the weighted-average unused portion of the Revolver.

At June 30, 2011, no amounts were borrowed under the Revolver, and we had outstanding letters of credit totaling $9.7 million, which reduced the unused portion of the Revolver to $50.3 million. We are required to maintain certain financial covenants, including balance sheet and cash flow ratios. As of June 30, 2011, we were in compliance with these covenants.

NOTE 5 – CONTRACT COSTS

Pass-through costs consist of material and sub-contract costs associated with projects that are included in revenue, but have little or no impact to the amount of gross margin. Pass-through costs, as a percentage of revenue, for the three-month period ended June 30, 2011 were 50.4% compared to 43.7% for the three month period ended June 30, 2010. Pass-through costs, as a percentage of revenue, for the six-month period ended June 30, 2011 were 46.4% compared to 40.6% for the six-month period ended June 30, 2010.

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At June 30, 2011, we recorded revenue totaling $784,000 related to certain change orders on two projects which have been approved as to scope but not price. We expect to resolve these change orders in the third quarter of 2011. At June 30, 2010, we had no unapproved change orders recorded in revenue.

Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined. We recognized contract losses of $688,000 and $1.2 million in the three months ended June 30, 2011 and 2010, respectively. We recognized contract losses of $1.1 million and $1.5 million in the six months ended June 30, 2011 and 2010, respectively.

NOTE 6 – EARNINGS (LOSS) PER SHARE

The following table sets forth the computation of basic and diluted earnings (loss) per share (in thousands, except per share data):

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NOTE 7 – SUBSEQUENT EVENTS

On July 28, 2011, our Board of Directors declared a dividend of $0.06 per share on the shares of our common stock outstanding, payable August 29, 2011 to shareholders of record on August 12, 2011.

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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 June 30, 2011, and the related condensed consolidated statements of operations for the three-month and six-month periods ended June 30, 2011 and 2010, condensed consolidated statements of cash flows for the six-month periods ended June 30, 2011 and 2010, and the condensed consolidated statement of changes in shareholders’ equity for the six-month period ended June 30, 2011. 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, 2010, 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 February 28, 2011, 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, 2010, is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived.

New Orleans, Louisiana

August 1, 2011

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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 in Item 1A. Risk Factors included in our Annual Report on Form 10-K for the year ended December 31, 2010. Such factors include, among others, the cyclical nature of the oil and gas industry; our ability to attract and retain skilled employees at acceptable compensation rates; the timing of new projects, including deepwater projects, and our ability to obtain them; and competitive factors in the heavy marine fabrication industry.

Critical Accounting Policies and Estimates

Our 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 our Annual Report on Form 10-K for the year ended December 31, 2010). We believe that our accounting policy on revenue recognition involves a high degree of judgment and complexity. Critical accounting policies are discussed more fully in our Annual Report on Form 10-K for the year ended December 31, 2010. There have been no changes in our evaluation of our critical accounting policies since that date.

Backlog

Our backlog is based on management’s estimate of the direct labor hours required to complete, and the remaining revenue to be recognized with respect to, those projects as to which a customer has authorized us to begin work or purchase materials pursuant to written contracts, letters of intent or other forms of authorization. Often, however, management’s estimates are based on incomplete engineering and design specifications. As engineering and design plans are finalized or changes to existing plans are made, management’s estimate of the direct labor hours required to complete and price at completion is likely to change. In addition, all projects currently included in our backlog are subject to termination at the option of the customer, although the customer is generally required to pay us for work performed and materials purchased through the date of termination and, in some instances, cancellation fees. In addition, customers have the ability to delay the execution of projects.

As of June 30, 2011, we had revenue backlog of $712.3 million and a labor backlog of approximately 6.2 million man-hours, consisting of work remaining on commitments received through July 28, 2011, compared to revenue backlog of $486.1 million and a labor backlog of 3.8 million man-hours as of December 31, 2010. Of our backlog at June 30, 2011, 76.5% is for three customers.

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Of the backlog at June 30, 2011, $565.8 million, or 79.4%, represented projects destined for deepwater locations compared to $343.4 million, or 70.6%, in the December 31, 2010 backlog. Depending on the size of the project, the termination or postponement of any one of our deepwater projects could significantly reduce our backlog, and could have a material adverse effect on revenue, net income and cash flow.

Of the backlog at June 30, 2011, we expect to recognize revenues of approximately $226.2 million (31.8%) during calendar year 2011, $428.9 million during calendar year 2012 and the remaining $57.2 million thereafter.

Workforce

As of June 30, 2011, we had approximately 1,500 employees and approximately 135 contract employees, compared to approximately 1,250 employees and approximately 10 contract employees as of December 31, 2010.

Results of Operations

Our revenue for the three-month periods ended June 30, 2011 and June 30, 2010, was $87.3 million and $75.3 million, respectively, an increase of 15.9%. Our revenue for the six-month periods ended June 30, 2011 and June 30, 2010, was $133.6 million and $144.5 million, respectively, representing a decrease of 7.5%.

The following factors contributed to the increase in revenues for the three-month period ended June 30, 2011:

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The following factors contributed to the decrease in revenues for the six-month period ended June 30, 2011:

At June 30, 2011, we recorded revenue totaling $784,000 related to certain change orders on two projects which have been approved as to scope but not price. We expect to resolve these change orders in the third quarter of 2011. At June 30, 2010, we had no unapproved change orders recorded in revenue.

For the three-month periods ended June 30, 2011 and June 30, 2010, gross profit was $4.8 million (5.6% of revenue) and $6.7 million (8.9% of revenue), respectively. Factors that contributed to the decrease in gross margin for the three-month period ended June 30, 2011 compared to the three-month period ended June 30, 2010 include:

For the six-month period ended June 30, 2011, gross loss was $4.7 million compared to gross profit of $14.2 million (9.8% of revenue) for the six-month period ended June 30, 2010. Factors contributing to the decrease in gross profit for the six-month period ended June 30, 2011 compared to the six-month period ended June 30, 2010 include:

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The Company’s general and administrative expenses were $2.0 million and $3.9 million for the three-month and six-month periods ended June 30, 2011. This compares to $2.0 million and $4.1 million for the three-month and six-month periods ended June 30, 2010. As a percentage of revenue, general and administrative expenses for the three-month and six-month periods ended June 30, 2011 were 2.2% and 2.9%, compared to 2.6% and 2.8%, for the three-month and six-month periods ended June 30, 2010.

The Company had net interest income of $124,000 and $117,000 for the three-month and six-month periods ended June 30, 2011, compared to net interest income of $328,000 and $1.3 million for the three-month and six-month periods ended June 30, 2010, respectively. The interest income for the periods ended June 30, 2010 was primarily related to the accretion of the discount associated with the financing arrangement with Bluewater and ATP on the fabrication of the MinDOC I hull. On November 29, 2010, our financing arrangement with Bluewater/ATP was completely settled following the sale of our limited overriding royalty interest.

The Company had other income of $228,000 for the three-month and six-month periods ended June 30, 2011, compared to $285,000 and $1.0 million for the three-month and six-month periods ended June 30, 2010. Other income for the periods ended June 30, 2011, represents gains on sales of miscellaneous equipment. Other income for the three-month and six-month periods ended June 30, 2010 represents gains with respect to the settlement of claims related to damages incurred in connection with the hurricanes that hit the Gulf Coast in 2008.

Our effective income tax rates for the three-month and six-month periods ended June 30, 2011 were 43.4% and 38.0%, respectively, compared to an effective tax rate of 35.9% and 36.0% for the comparable periods of 2010. The increase in the effective rate for the three-month and six-month periods related primarily to the decrease in our Federal qualified production activities income deduction due to both a decrease in activity at our Texas facility and the $7.7 million of expense related to the insurance claim as described in Note 3 in the Notes to Consolidated Financial Statements. The increase in the effective rate for the three-month period also relates to the impact of a change in the estimated effective tax rate for 2011 related to a change in estimated state income tax apportionment recorded in the second quarter of 2011.

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Liquidity and Capital Resources

Historically we have funded our business activities through funds generated from operations. Effective May 31, 2011, we extended the term of our $60 million revolving credit facility (the “Revolver”) from December 31, 2012 to December 31, 2013. All other terms of our Revolver remained unchanged. Our Revolver is secured by our real estate, machinery and equipment, and fixtures. 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 percent. We pay a fee on a quarterly basis of one-fourth of one percent per annum on the weighted-average unused portion of the Revolver.

At June 30, 2011, no amounts were borrowed under the Revolver, and we had outstanding letters of credit totaling $9.7 million, which reduced the unused portion of the Revolver to $50.3 million. We are required to maintain certain financial covenants, including balance sheet and cash flow ratios, and as of June 30, 2011, were in compliance with these covenants.

At June 30, 2011, our cash and cash equivalents totaled $32.1 million. For the six-months ended June 30 2011, net cash used in operating activities was $32.0 million and capital expenditures for the period were $22.3 million. The $7.7 million charge for asset impairments related to the insurance claim as described in Note 3 in the Notes to Consolidated Financial Statements had no effect on our cash or working capital for the period. Working capital was $98.2 million and ratio of current assets to current liabilities was 2.72 to 1 at June 30, 2011

The overall decrease in cash provided by operations for the period ended June 30, 2011, compared to the period ended June 30, 2010 is mainly due to the increase in accounts receivable partially offset by the increase in accounts payable. As we begin to work on larger deepwater projects we have in our backlog, accounts payable increased $14.7 million as we purchase materials for those projects and accounts receivable increased $77.4 million as we began invoicing customers for the purchase of such materials.

Net cash used in investing activities for the six-months ended June 30, 2011, was $22.3 million, all of which related to capital expenditures for equipment and improvements to our production facilities. Included in capital expenditures for the six months ended June 30, 2011 was $11.0 million for two Manitowoc crawler cranes and $1.1 million representing the remaining cost of constructing a gate for the graving dock at our Texas facilities. Also included in capital expenditures for the first six months of 2011 was $3.3 million for six Kamag transporters to be delivered in the third quarter of 2011.

Net cash used in financing activities for the three-months ended June 30, 2011, was $1.7 million, primarily relating to cash used to pay dividends on shares of our common stock.

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While current job awards will and future job awards may require us to issue additional letters of credit further reducing the capacity available on our Revolver, we believe our cash generated by operating activities and funds available under the bank credit facility will be sufficient to fund our capital expenditures and meet our working capital needs. Based on our current projections, our outstanding letters of credit could increase to $22.0 million by the end of 2011.

We may expand our operations through acquisitions in the future, which may require additional equity or debt financing which we believe would be available to us.

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, 2010.

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, 2010.

There have been no material changes in the Company’s market risks during the quarter ended June 30, 2011. For more information on market risk, refer to Part II, Item 7A of our Annual Report on Form 10-K for the year ended December 31, 2010.

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 fiscal quarter ended June 30, 2011 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, 2010.

Consolidated Statements of Income for the three and six months ended June 30, 2011 and June 30, 2010;

Consolidated Balance Sheets as of June 30, 2011 and December 31, 2010;

Consolidated Statement of Changes in Shareholders’ Equity for the six months ended June 30, 2011;

Consolidated Statements of Cash Flows for the six months ended June 30, 2011 and June 30, 2010; and

Notes to Consolidated Financial Statements.

In accordance with Rule 406T of Regulation S-T, the XBRL related information in Exhibit 101 to this Quarterly Report on Form 10-Q is furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of the section, and shall not be part of any registration statement or other document filed under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

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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: August 1, 2011

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GULF ISLAND FABRICATION, INC.

EXHIBIT INDEX

Consolidated Statements of Income for the three and six months ended June 30, 2011 and June 30, 2010;

Consolidated Balance Sheets as of June 30, 2011 and December 31, 2010;

Consolidated Statement of Changes in Shareholders’ Equity for the six months ended June 30, 2011;

Consolidated Statements of Cash Flows for the six months ended June 30, 2011 and June 30, 2010; and

Notes to Consolidated Financial Statements.

In accordance with Rule 406T of Regulation S-T, the XBRL related information in Exhibit 101 to this Quarterly Report on Form 10-Q is furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of the section, and shall not be part of any registration statement or other document filed under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

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