NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

SEPTEMBER 30, 2013

(UNAUDITED)

NOTE 1—BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

Nature of Operations

McDermott International, Inc. (“MII”), a corporation incorporated under the laws of the Republic of Panama in 1959, is a leading engineering, procurement, construction and installation (“EPCI”) company focused on designing and executing complex offshore oil and gas projects worldwide. Providing fully integrated EPCI services, we deliver fixed and floating production facilities, pipeline installations and subsea systems from concept to commissioning. We support these activities with comprehensive project management and procurement services, while utilizing our fully integrated capabilities in both shallow water and deepwater construction. Our customers include national, major integrated and other oil and gas companies, and we operate in most major offshore oil and gas producing regions throughout the world. In these notes to our unaudited condensed consolidated financial statements, unless the context otherwise indicates, “we,” “us” and “our” mean MII and its consolidated subsidiaries.

Basis of Presentation

We have presented our unaudited condensed consolidated financial statements in U.S. Dollars, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) applicable to interim reporting. Financial information and disclosures normally included in our financial statements prepared annually in accordance with accounting principles generally accepted in the United States (“GAAP”) have been condensed or omitted. Readers of these financial statements should, therefore, refer to the consolidated financial statements and the accompanying notes in our annual report on Form 10-K for the year ended December 31, 2012.

We have included all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation. These condensed consolidated financial statements include the accounts of McDermott International, Inc., its consolidated subsidiaries and controlled entities. We use the equity method to account for investments in entities that we do not control, but over which we have significant influence. We generally refer to these entities as “unconsolidated affiliates” or “joint ventures.” We have eliminated all intercompany transactions and accounts.

During the quarter ended March 31, 2013, we acquired Deepsea Group Limited, a United Kingdom-based company that provides subsea and other engineering services to international energy companies, primarily through offices in the United Kingdom and the United States. During the quarter ended June 30, 2013, we commenced a restructuring of our Atlantic segment. See Note 2 for information relating to our acquisition and disposition-related activities.

On March 19, 2012, we completed the sale of our former charter fleet business, which operated 10 of the 14 vessels acquired in our 2007 acquisition of substantially all of the assets of Secunda International Limited (the “Secunda Acquisition”). The condensed consolidated statements of income, comprehensive income, cash flows and equity reflect the historical operations of the charter fleet business as a discontinued operation through March 19, 2012.

We have presented the notes to our condensed consolidated financial statements on the basis of continuing operations. In addition, certain 2012 amounts in the condensed consolidated balance sheet and statement of cash flows have been reclassified to conform to the 2013 presentation.

Business Segments

We operate in four primary operating segments, which consist of Asia Pacific, Atlantic, Caspian and the Middle East. The Caspian and Middle East operating segments are aggregated into the Middle East reporting

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segment due to the proximity of regions and similarities in the nature of services provided, economic characteristics and oversight responsibilities. Accordingly, we report financial results under reporting segments consisting of Asia Pacific, Atlantic and the Middle East. We also report certain corporate and other non-operating activities under the heading “Corporate and Other.” Corporate and Other primarily reflects corporate personnel and activities, incentive compensation programs and other costs, which are generally fully allocated to our operating segments. See Note 9 for summarized financial information on our segments.

Revenue Recognition

We determine the appropriate accounting method for each of our long-term contracts before work on the project begins. We generally recognize contract revenues and related costs on a percentage-of-completion method for individual contracts or combinations of contracts based on work performed, man hours, or a cost-to-cost method, as applicable to the activity involved. We include the amount of accumulated contract costs and estimated earnings that exceed billings to customers in contracts in progress. We include billings to customers that exceed accumulated contract costs and estimated earnings in advance billings on contracts. Most long-term contracts contain provisions for progress payments. We expect to invoice customers and collect all unbilled revenues. Certain costs are generally excluded from the cost-to-cost method of measuring progress, such as significant procurement costs for materials and third-party subcontractors. Costs incurred prior to a project award are generally expensed during the period in which they are incurred. Total estimated project costs, and resulting income, are affected by changes in the expected cost of materials and labor, productivity, vessel costs, scheduling and other factors. Additionally, external factors such as weather, customer requirements and other factors outside of our control may affect the progress and estimated cost of a project’s completion and, therefore, the timing and amount of revenue and income recognition.

In addition, change orders, which are a normal and recurring part of our business, can increase (and sometimes substantially) the future scope and cost of a job. Therefore, change order awards (although frequently beneficial in the long term) can have the short-term effect of reducing the job percentage of completion and thus the revenues and profits recognized to date. We regularly review contract price and cost estimates as the work progresses and reflect adjustments in profit, proportionate to the job percentage of completion in the period when those estimates are revised. Revenue from unapproved change orders is generally recognized to the extent of the lesser of amounts management expects to recover or costs incurred. The total unapproved change orders included in our estimates at completion aggregated approximately $468 million, of which approximately $138 million was included in backlog at September 30, 2013. Unapproved change orders that are disputed by the customer are treated as claims.

Deferred Profit Recognition

For contracts as to which we are unable to estimate the final profitability due to their uncommon nature, including first-of-a-kind projects, we recognize equal amounts of revenue and cost until the final results can be estimated more precisely. For these contracts, we only recognize gross margin when reliably estimable and the level of uncertainty has been significantly reduced, which we generally determine to be when the contract is at least 70% complete. We treat long-term construction contracts that contain such a level of risk and uncertainty that estimation of the final outcome is impractical as deferred profit recognition contracts. If while being accounted for under our deferred profit recognition policy, a current estimate of total contract costs indicates a loss, the projected loss is recognized in full and the project is accounted for under our normal revenue recognition guidelines.

We currently account for an Atlantic segment project under our deferred profit recognition policy. This project was awarded to one of our joint ventures, and the Atlantic segment’s backlog includes a subcontract from that joint venture, of which $151.3 million relating to this project remains in backlog at September 30, 2013. This project contributed revenues and costs equally, totaling approximately $36.0 million and $16.0 million for the three-month periods ended September 30, 2013 and 2012, respectively, and approximately $79.0 million and $29.0 million for the nine-month periods ended September 30, 2013 and 2012, respectively.

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Completed Contract Method

Under the completed contract method, revenue and gross profit is recognized only when a contract is completed or substantially complete. We generally do not enter into fixed-price contracts without an estimate of cost to complete that we believe to be accurate. However, it is possible that in the time between contract award and the commencement of work on a project, we could lose the ability to adequately forecast costs to complete based on intervening events, including, but not limited to, experience on similar projects, civil unrest, strikes and volatility in our expected costs. In such a situation, we would use the completed contract method of accounting for that project. We currently do not have any contracts that we account for under the completed contract method.

Claims Revenue

Claims revenue may relate to various factors, including the procurement of materials, equipment performance failures, change order disputes or schedule disruptions and other delays, including those associated with weather conditions. Claims revenue, when recorded, is only recorded to the extent of the lesser of the amounts management expects to recover or the associated costs incurred in our consolidated financial statements. We include certain unapproved claims in the applicable contract values when we have a legal basis to do so, consider collection to be probable and believe we can reliably estimate the ultimate value. Amounts attributable to unapproved change orders are not included in claims. We continue to actively engage in negotiations with our customers on our outstanding claims. However, these claims may be resolved at amounts that differ from our current estimates, which could result in increases or decreases in future estimated contract profits or losses. Claims are generally negotiated over the course of the respective projects and many of our projects are long-term in nature. None of the claims at September 30, 2013 were involved in litigation.

The amount of revenues and costs included in our estimates at completion ( i.e. , contract values) associated with such claims was $186.3 million and $78.6 million as of September 30, 2013 and 2012, respectively. Approximately 41%, 8% and 51% of those claim amounts at September 30, 2013 were related to our Asia Pacific, Atlantic and Middle East segments, respectively. These amounts are determined based on various factors, including our analysis of the underlying contractual language and our experience in making and resolving claims. For the three months ended September 30, 2013 and 2012, $17.6 million and $7.0 million, respectively, of revenues and costs are included in our financial statements pertaining to claims. For the nine months ended September 30, 2013 and 2012, $56.9 million and $45.0 million, respectively, of revenues and costs are reflected in our financial statements pertaining to claims. Approximately 10%, 11% and 79% of those claim amounts are related to our Asia Pacific, Atlantic and Middle East segments, respectively.

Our unconsolidated joint ventures also included an aggregate of $3.7 million of claims revenue and costs in their financial results for the nine months ended September 30, 2013, with no amounts recognized during the three months ended September 30, 2013. For the three months and nine months ended September 30, 2012, our joint ventures included approximately $9.0 million and $14.0 million, respectively of claims revenue and costs in their financial results.

Loss Recognition

A risk associated with fixed-priced contracts is that revenue from customers may not cover increases in our costs. It is possible that current estimates could materially change for various reasons, including, but not limited to, fluctuations in forecasted labor and vessel productivity, vessel repair requirements, weather downtime, supplier performance, pipeline lay rates or steel and other raw material prices. Increases in costs associated with our fixed-priced contracts could have a material adverse impact on our consolidated financial condition, results of operations and cash flows. Alternatively, reductions in overall contract costs at completion could materially improve our consolidated financial condition, results of operations and cash flows.

As of September 30, 2013, we have provided for our estimated costs to complete on all of our ongoing contracts. However, it is possible that current estimates could change due to unforeseen events, which could

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result in adjustments to overall contract costs. Variations from estimated contract performance could result in material adjustments to operating results for any fiscal quarter or year. For all contracts, if a current estimate of total contract cost indicates a loss, the projected loss is recognized in full when determined.

We currently have four active projects in our backlog that are in loss positions at September 30, 2013, whereby future revenues are expected to equal costs when recognized. Included in these projects are a marine project in our Asia Pacific segment, which we began in 2012 and expect to complete by mid-2014, and a five-year charter in Brazil, which we began in early 2012 and we are conducting through our Atlantic segment.

Use of Estimates

We use estimates and assumptions to prepare our financial statements in conformity with GAAP. These estimates and assumptions affect the amounts we report in our financial statements and accompanying notes. Our actual results could differ from these estimates, and variances could materially affect our financial condition and results of operations in future periods. Changes in project estimates generally exclude change orders and changes in scope, but may include, without limitation, unexpected changes in weather conditions, productivity, unanticipated vessel repair requirements, customer and vendor delays and other costs. We generally expect to experience a variety of unanticipated events, and some of these events can result in significant cost increases above cost amounts we previously estimated. Variations from estimated contract performance could result in material adjustments to operating results.

The following is a discussion of our most significant changes in estimates, which impacted operating income in each of our segments for the three and nine months ended September 30, 2013 and 2012.

Three months ended September 30, 2013

The Asia Pacific segment was primarily impacted by changes in estimates on one subsea project in Malaysia. On that project, we increased our estimated cost at completion by approximately $66.0 million in the three months ended September 30, 2013. The changes in estimates experienced on this project were primarily due to further delays in vessel availability related to downtime for the North Ocean 105 (“ NO 105 ”) resulting from mechanical issues. The changes in estimates on this project were partially offset by approximately $33.0 million of improvements related to arrangements with our customer, resulting in a net decline recognized in the three months ended September 30, 2013 of approximately $33.0 million. This project is currently in a loss position and is expected to be completed by mid-2014.

The Atlantic segment was impacted by changes in estimates on one project in Mexico. On that project, we recognized approximately $9.0 million of project losses in the three months ended September 30, 2013, primarily due to increased fabrication costs associated with increases to the scope of the project and incremental costs associated with productivity. The project is currently in a loss position and is expected to be completed during the second half of 2015.

The Middle East segment was not significantly impacted by changes in estimates during the quarter ended September 30, 2013.

Nine months ended September 30, 2013

The Asia Pacific segment was primarily impacted by changes in estimates on the project in Malaysia described above. On that project, we increased our estimated cost at completion by approximately $132.0 million in the nine months ended September 30, 2013. The changes in estimates experienced on this project were primarily due to delays in vessel availability related to downtime for the NO 105 resulting from mechanical issues. The changes in estimates on this project were partially offset by approximately $33.0 million of improvements related to arrangements with our customer, resulting in a net decline recognized in the nine months ended September 30, 2013 of approximately $99.0 million. This project is currently in a loss position and is expected to be completed by mid-2014.

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The Middle East segment was impacted by changes in estimates on an EPCI project in Saudi Arabia. On that project, we increased our estimated cost at completion by approximately $38.0 million in the nine months ended September 30, 2013, primarily as a result of revisions to the project’s execution plan, increases in our estimated cost to complete due to an extended offshore hookup campaign requiring multiple vessel mobilizations and, to a lesser extent, delays in the completion of onshore activities. While the project recognized losses in the nine months ended September 30, 2013, it remains in an overall profitable position and is expected to be completed during the first half of 2014, subject to customer deliverables and concurrence on execution plans.

The Atlantic segment was impacted by changes in estimates on two projects. On those projects, we recognized approximately $21.0 million of incremental project losses in the nine months ended September 30, 2013, primarily due to lower than expected labor productivity and incremental fabrication costs. Both projects are currently in loss positions. One project that experienced lower labor productivity is expected to be completed by the end of 2013, while the other project that recognized additional costs associated with fabrication activities is expected to be completed by the third quarter of 2015.

2012 Periods

Operating income for each of the three-month and nine-month periods ended September 30, 2012 was not significantly affected by changes in estimates.

Loss Contingencies

We record liabilities for loss contingencies when it is probable that a liability has been incurred and the amount of loss is reasonably estimable. We provide disclosure when there is a reasonable possibility that the ultimate loss will exceed the recorded provision or if such loss is not reasonably estimable. We are currently involved in litigation and other proceedings, as discussed in Note 10. We have accrued our estimates of the probable losses associated with these matters, and associated legal costs are generally recognized in selling, general and administrative expenses as incurred. However, our losses are typically resolved over long periods of time and are often difficult to estimate due to various factors, including the possibility of multiple actions by third parties. Therefore, it is possible future earnings could be affected by changes in our estimates related to these matters.

Cash and Cash Equivalents

Our cash and cash equivalents are highly liquid investments with maturities of three months or less when we purchase them. We record cash and cash equivalents as restricted when we are unable to freely use such cash and cash equivalents for our general operating purposes. At September 30, 2013, all of our restricted cash was held in restricted foreign-entity accounts.

Investments

We classify investments available for current operations as current assets in the accompanying balance sheets, and we classify investments held for long-term purposes as noncurrent assets. We adjust the amortized cost of debt securities for amortization of premiums and accretion of discounts to maturity. That amortization is included in interest income. We include realized gains and losses on our investments in other income (expense)—net. The cost of securities sold is based on the specific identification method. We include interest earned on securities in interest income.

Investments in Unconsolidated Affiliates

We generally use the equity method of accounting for affiliates in which our investment ownership ranges from 20% to 50%. Currently, most of our significant investments in affiliates that are not consolidated are recorded using the equity method.

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We expect to invoice our unbilled receivables once certain milestones or other metrics are reached, and we expect to collect all unbilled amounts. We believe that our provision for losses on uncollectible accounts receivable is adequate for our credit loss exposure.

Contract retainages generally represent amounts withheld by our customers until project completion, in accordance with the terms of the applicable contracts. The following is a summary of retainages on our contracts:

We have included in accounts receivable—trade, net, retainages expected to be collected within one year. Retainages expected to be collected after one year are included in other assets.

Accounts Receivable—Other

Accounts receivable—other was $110.3 million and $75.5 million at September 30, 2013 and December 31, 2012, respectively. The balance primarily relates to transactions with unconsolidated affiliates, accrued but unbilled revenues, receivables associated with value-added taxes and hedging activities. These amounts are expected to be collected within 12 months, and any allowance for doubtful accounts on our accounts receivable—other is based on our estimate of the amount of probable losses due to the inability to collect these amounts (based on historical collection experience and other available information). As of September 30, 2013 and December 31, 2012, no such allowance for doubtful accounts was recorded.

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Fair Value of Financial Instruments

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. An established hierarchy for inputs is used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs that market participants would use in valuing the asset or liability and are developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect our assumptions about the factors that market participants would use in valuing the asset or liability.

Fair value is estimated by applying the following hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement:

The carrying amounts that we have reported for financial instruments, including cash and cash equivalents, accounts receivables and accounts payable approximate their fair values. See Note 6 for additional information regarding fair value measurements.

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Derivative Financial Instruments

Our worldwide operations give rise to exposure to changes in certain market conditions, which may adversely impact our financial performance. When we deem it appropriate, we use derivatives as a risk management tool to mitigate the potential impacts of certain market risks. The primary market risk we manage through the use of derivative instruments is movement in foreign currency exchange rates. We use foreign currency derivative contracts to reduce the impact of changes in foreign currency exchange rates on our operating results. We use these instruments to hedge our exposure associated with revenues and/or costs on our long-term contracts and other cash flow exposures that are denominated in currencies other than our operating entities’ functional currencies. We do not hold or issue financial instruments for trading or other speculative purposes.

In certain cases, contracts with our customers contain provisions under which some payments from our customers are denominated in U.S. Dollars and other payments are denominated in a foreign currency. In general, the payments denominated in a foreign currency are designed to compensate us for costs that we expect to incur in such foreign currency. In these cases, we may use derivative instruments to reduce the risks associated with foreign currency exchange rate fluctuations arising from differences in timing of our foreign currency cash inflows and outflows. See Note 5 for additional information regarding derivative financial instruments.

Foreign Currency Translation

We translate assets and liabilities of our foreign operations, other than operations in highly inflationary economies, into U.S. Dollars at period-end exchange rates, and we translate income statement items at average exchange rates for the periods presented. We record adjustments resulting from the translation of foreign currency financial statements as a component of accumulated other comprehensive income (loss) (“AOCI”), net of tax.

Earnings per Share

We have computed earnings per common share on the basis of the weighted average number of common shares, and, where dilutive, common share equivalents, outstanding during the indicated periods. See Note 8 for our earnings per share computations.

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The following tables present the components of AOCI and the amounts that were reclassified during the period:

Impairment Review

We review goodwill for impairment on an annual basis or more frequently if circumstances indicate that impairment may exist. The annual impairment review involves comparing the fair value to the net book value of each applicable reporting unit and, therefore, is significantly impacted by estimates and judgments.

We review our long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. If an evaluation is required, the fair value of each applicable asset is compared to its carrying value. Factors that impact our determination of potential impairment include forecasted utilization of equipment and estimates of forecasted cash flows from projects expected to be performed in future periods. Our estimates of cash flow may differ from actual cash flow due to, among other things, technological changes, economic conditions or changes in operating performance. Any changes in such factors may negatively affect our business segments and result in future asset impairments.

Income Taxes

We provide for income taxes based on the tax laws and rates in the countries in which we conduct our operations. MII is a Panamanian corporation that earns all of its income outside of Panama. As a result, we are not subject to income tax in Panama. We operate in various taxing jurisdictions around the world. Each of these jurisdictions has a regime of taxation that varies, not only with respect to nominal rates, but also with respect to the basis on which these rates are applied. These variations, along with changes in our mix of income or loss from these jurisdictions, may contribute to shifts, sometimes significant, in our effective tax rate.

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Three months ended September 30, 2013

For the three months ended September 30, 2013, we recognized a loss before provision for income taxes of $46.8 million, compared to income of $84.2 million in the three months ended September 30, 2012. In the aggregate, the provision for income taxes was $12.3 million and $29.9 million for the three months ended September 30, 2013 and 2012, respectively. The decline in the provision for income taxes was principally driven by lower taxable income, which was partially offset by losses in certain tax jurisdictions where we do not expect to receive a tax benefit (primarily the United States, Mexico and Malaysia).

Nine months ended September 30, 2013

For the nine months ended September 30, 2013, we recognized a loss before provision for income taxes of $135.4 million, compared to income of $257.2 million in the nine months ended September 30, 2012. In the aggregate, the provision for income taxes was $45.5 million and $87.0 million for the nine months ended September 30, 2013 and 2012, respectively. The decline in the provision for income taxes was principally driven by lower taxable income, which was partially offset by losses in certain tax jurisdictions where we do not expect to receive a tax benefit (primarily the United States, the United Arab Emirates and Malaysia).

At September 30, 2013, we had foreign net operating loss carryforwards available to offset future taxable income in foreign jurisdictions with a valuation allowance of $76.0 million against $85.0 million of the related deferred taxes. The remaining $9.0 million of foreign deferred taxes is expected to be realized through future foreign taxable income. At September 30, 2013, we had U.S. federal net operating loss carryforwards but had fully reserved the $135.0 million deferred tax asset.

Recently Issued Accounting Standards

On July 18, 2013, the Financial Accounting Standards Board (“FASB”) issued an update to the topic Income Taxes . The update clarifies that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward if such settlement is required or expected in the event the uncertain tax position is disallowed. In situations where these items are not available at the reporting date under the tax law of the applicable jurisdiction or the tax law of the jurisdiction does not require, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The update is effective for reporting periods after December 15, 2013 and the adoption of this update is not expected to have a material impact on our condensed consolidated financial statements.

In February 2013, the FASB issued an update to the topic Comprehensive Income . The update requires companies to provide additional information about the nature and amount of certain reclassifications out of AOCI, which impact the income statement. While the amendment does not change current reporting requirements, companies are required to provide information about the amounts reclassified out of AOCI by the respective line item. The update is effective for reporting periods after December 15, 2012 and the adoption of this update did not have a material impact on our condensed consolidated financial statements.

In January 2013, the FASB issued an update to the topic Balance Sheet . This update requires new disclosures presenting detailed information regarding both the gross and net basis of derivatives and other financial instruments that are eligible for offset in the balance sheet or that are subject to a master netting arrangement. The update is effective for the first quarter of 2013 and is to be applied retrospectively. As this new guidance relates to presentation only, the adoption of this update did not have a material impact on our condensed consolidated financial statements.

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NOTE 2—ACQUISITION, DISPOSITIONS AND ATLANTIC RESTRUCTURING CHARGES

Acquisition

During the quarter ended March 31, 2013, we entered into a share purchase agreement to acquire all of the issued and outstanding shares of capital stock of Deepsea Group Limited, a United Kingdom-based company that provides subsea and other engineering services to international energy companies, primarily through offices in the United Kingdom and the United States. Total consideration was approximately $9.0 million, which includes cash ($6.0 million) and the delivery of 313,580 restricted shares of MII common stock (out of treasury). The transaction is being accounted for using the acquisition method and, accordingly, assets acquired and liabilities assumed are recorded at their respective fair values. The preliminary purchase price allocation has not been completed and is subject to change for a period of one-year following the acquisition. Results of operations and pro forma results have not been presented, as the effects of this transaction were not material to our condensed consolidated financial statements.

Dispositions

Assets Held for Sale

We previously committed to a plan to sell four of our multi-function marine vessels, specifically the Bold Endurance, DB 16 , DB 26 and the DLB KP1 . Assets classified as held for sale are no longer depreciated. During the quarter ended March 31, 2013, we completed the sale of the Bold Endurance and the DB 26 for aggregate cash proceeds of approximately $32.0 million, resulting in an aggregate gain of approximately $12.5 million. We remain in active discussions with interested parties to sell the DLB KP1 and DB 16 .

Charter Fleet Business

On March 19, 2012, we completed the sale of our former charter fleet business, which operated 10 of the 14 vessels acquired in 2007 in the Secunda Acquisition. The cash proceeds from the charter fleet sale were approximately $61.0 million, resulting in a gain on the sale of approximately $0.3 million. For the year ended December 31, 2011, we recognized an approximate $22.0 million write-down of our former charter fleet business.

The following table presents selected financial information regarding the results of operations attributable to our former charter fleet business:

Restructuring and Management Charges

We commenced a restructuring of our Atlantic operations during the quarter ended June 30, 2013, which involves our Morgan City, Louisiana, Houston, Texas, New Orleans, Louisiana and Brazil locations. The restructuring involves, among other things, reductions of management, administrative, fabrication and engineering personnel, and a plan to discontinue utilization of the Morgan City facility (after the completion of existing backlog projects, which are currently forecasted to be completed in the second quarter of 2014). Future fabrication operations in the Atlantic segment are expected to be executed using the Altamira, Mexico facility for

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the foreseeable future. In addition, we have reached an agreement in principle to exit our joint venture operation in Brazil, which was specifically formed to construct and integrate floating, production, storage, off-loading (“FPSO”) modules.

In addition, in October 2013, we announced certain executive management changes that will become effective during the quarter ending December 31, 2013.

Costs associated with our restructuring activities and the management changes will primarily include severance and other personnel-related costs, costs associated with exiting the joint venture in Brazil, asset impairment and relocation costs and future unutilized lease costs. The total costs are expected to range between $55 million to $65 million in the aggregate. Of the total anticipated costs, we incurred approximately $4.0 million during the quarter ended September 30, 2013 and had incurred an aggregate of $19.5 million as of September 30, 2013. We expect to recognize the majority of these costs during the quarters ending December 31, 2013 and March 31, 2014.

NOTE 3—LONG-TERM DEBT AND NOTES PAYABLE

Credit Facility

In May 2010, we entered into a credit agreement with a syndicate of lenders and letter of credit issuers (as last amended in August 2013, the “Credit Agreement”). The Credit Agreement provides for revolving credit borrowings and issuances of letters of credit in an aggregate outstanding amount of up to $950.0 million and is scheduled to mature on August 19, 2016. Proceeds from borrowings under the Credit Agreement are available for working capital needs and other general corporate purposes. The Credit Agreement includes procedures for additional financial institutions to become lenders, or for any existing lender to increase its commitment thereunder.

In August 2013, we amended the Credit Agreement to, among other things: (1) add certain amounts to EBITDA (as defined in the Credit Agreement) for the fiscal quarters ended December 31, 2012, March 31, 2013 and June 30, 2013; (2) permit us to add to EBITDA certain cash expenses related to the Atlantic segment restructuring for the quarters ended or ending September 30, 2013, December 31, 2013 and March 31, 2014; and (3) increase the maximum permitted leverage ratio of total indebtedness to EBITDA from 3.00:1.00 to 3.75:1.00 for the quarters ended or ending September 30, 2013, December 31, 2013 and March 31, 2014. The August amendment to the Credit Agreement also provides that if we issue senior unsecured notes with a principal amount of at least $300 million, from the date of such issuance until March 31, 2014, the maximum permitted leverage ratio will increase from 3.75:1.00 to 5.00:1.00 and we will have to comply with a maximum permitted secured leverage ratio of total secured indebtedness to EBITDA of 2.00:1.00. The maximum leverage ratio and the minimum interest coverage ratio as defined in the Credit Agreement may differ in the method of calculation from similarly titled measures used by other companies or in other agreements. The Credit Agreement also contains covenants that restrict, among other things, debt incurrence, liens, investments, acquisitions, asset dispositions, dividends, prepayments of subordinated debt, mergers and capital expenditures.

Other than customary mandatory prepayments in connection with casualty events, the Credit Agreement requires only interest payments on a quarterly basis until maturity. We may prepay all loans under the Credit Agreement at any time without premium or penalty (other than customary LIBOR breakage costs), subject to certain notice requirements.

Our overall borrowing capacity is in large part dependent on maintaining compliance with covenants under the Credit Agreement by generating sufficient income from operations. At September 30, 2013, we were in compliance with our covenant requirements. A comparison of the key financial covenants and compliance is as follows:

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Loans outstanding under the Credit Agreement bear interest at the borrower’s option at either the Eurodollar rate plus a margin ranging from 1.50% to 2.50% per year or the base rate (the highest of the Federal Funds rate plus 0.50%, the 30-day Eurodollar rate plus 1.0%, or the administrative agent’s prime rate) plus a margin ranging from 0.50% to 1.50% per year. The applicable margin for revolving loans varies depending on the credit ratings of the Credit Agreement. We are charged a commitment fee on the unused portions of the Credit Agreement, and that fee varies between 0.200% and 0.450% per year depending on the credit ratings of the Credit Agreement. Additionally, we are charged a letter of credit fee of between 1.50% and 2.50% per year with respect to the amount of each financial letter of credit issued under the Credit Agreement and a letter of credit fee of between 0.75% and 1.25% per year with respect to the amount of each performance letter of credit issued under the Credit Agreement, in each case depending on the credit ratings of the Credit Agreement. Under the Credit Agreement, we also pay customary issuance fees and other fees and expenses in connection with the issuance of letters of credit under the Credit Agreement. In connection with entering into the Credit Agreement and certain amendments to the Credit Agreement, we paid certain fees to the lenders thereunder, and certain arrangement and other fees to the arrangers and agents for the Credit Agreement, which are being amortized to interest expense over the term of the Credit Agreement.

At September 30, 2013, there were no borrowings outstanding, and letters of credit issued under the Credit Agreement totaled $237.0 million. At September 30, 2013, there was $713.0 million available for borrowings or to meet letter of credit requirements under the Credit Agreement. During the quarter ended September 30, 2013, our outstanding borrowings under the Credit Agreement did not exceed $80.0 million, and our average outstanding borrowings under the Credit Agreement during the period from July 1, 2013 through September 30, 2013 was approximately $40.0 million with an average interest rate of 2.16%. In addition, we had $82.6 million in outstanding unsecured bilateral letters of credit as of September 30, 2013.

At September 30, 2013, based on the credit ratings applicable to the Credit Agreement, the applicable margin for Eurodollar-rate loans was 1.75%, the applicable margin for base-rate loans was 0.75%, the letter of credit fee for financial letters of credit was 1.75%, the letter of credit fee for performance letters of credit was 0.875%, and the commitment fee for unused portions of the Credit Agreement was 0.25%. The Credit Agreement does not have a floor for the base rate or the Eurodollar rate.

North Ocean Financing

North Ocean 102

In December 2009, J. Ray McDermott, S.A. (“JRMSA”), a wholly owned subsidiary of MII, entered into a vessel-owning joint venture transaction with Oceanteam ASA. As a result of this transaction, we had consolidated notes payable of $32.9 million and $37.3 million on our condensed consolidated balance sheets at September 30, 2013 and December 31, 2012, respectively, of which $32.9 million and $6.0 million was classified as current notes payable at September 30, 2013 and December 31, 2012, respectively. JRMSA has guaranteed approximately 50% of this debt based on its ownership percentages in the vessel-owning companies. The outstanding debt bears interest at a rate equal to the three-month LIBOR (which resets every three months) plus a margin of 3.315% and matures in January 2014.

North Ocean 105

On September 30, 2010, MII, as guarantor, and North Ocean 105 AS, in which we have a 75% ownership interest, as borrower, entered into a financing agreement to finance a portion of the construction costs of the North Ocean 105 . The agreement provides for borrowings of up to $69.4 million, bearing interest at 2.76% per year, and requires principal repayment in 17 consecutive semi-annual installments, which commenced on October 1, 2012. Borrowings under the agreement are secured by, among other things, a pledge of all of the equity of North Ocean 105 AS, a mortgage on the North Ocean 105 , and a lien on substantially all of the other assets of North Ocean 105 AS. MII unconditionally guaranteed all amounts to be borrowed under the agreement. There was $61.3 million and $65.4 million in borrowings outstanding under this agreement on our

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balance sheets at September 30, 2013 and December 31, 2012, respectively, of which $8.2 million was classified as current notes payable at September 30, 2013 and December 31, 2012.

ANZ Reimbursement Agreement

On April 20, 2012, McDermott and one of its wholly owned subsidiaries, McDermott Australia Pty. Ltd. (“McDermott Australia”), entered into a secured Letter of Credit Reimbursement Agreement (the “Reimbursement Agreement”) with Australia and New Zealand Banking Group Limited (“ANZ”). In accordance with the terms of the Reimbursement Agreement, ANZ issued letters of credit in the aggregate amount of approximately $109.0 million to support McDermott Australia’s performance obligations under contractual arrangements relating to a field development project. The obligations of McDermott and McDermott Australia under the Reimbursement Agreement are secured by McDermott Australia’s interest in the contractual arrangements and certain related assets.

Surety Bonds

In 2012 and 2007, JRMSA executed general agreements of indemnity in favor of surety underwriters based in Mexico relating to surety bonds issued in support of contracting activities of J. Ray McDermott de Mèxico, S.A. de C.V., a subsidiary of JRMSA. As of September 30, 2013, the aggregate principal amount of bonds issued under these arrangements totaled $46.5 million.

Long-term debt and notes payable obligations

A summary of our long-term debt obligations are as follows:

NOTE 4—PENSION PLANS

Although we currently provide retirement benefits for most of our U.S. employees through sponsorship of the McDermott Thrift Plan, some of our longer-term U.S. employees and former employees are entitled to retirement benefits under the McDermott (U.S.) Retirement Plan, a non-contributory qualified defined benefit pension plan (the “McDermott Plan”), and several non-qualified supplemental defined benefit pension plans. The McDermott Plan and the non-qualified supplemental defined benefit pension plans are collectively referred to herein as the “Domestic Plans.” The McDermott Plan has been closed to new participants since 2006, and benefit accruals under the McDermott Plan were frozen completely in 2010.

We also sponsor a defined benefit pension plan established under the laws of the Commonwealth of the Bahamas, the J. Ray McDermott, S.A. Third Country National Employees Pension Plan (the “TCN Plan”), which provides retirement benefits for certain of our current and former foreign employees. Effective August 1, 2011, new entry into the TCN Plan was closed, and effective December 31, 2011, benefit accruals under the TCN Plan were frozen. Effective January 1, 2012, we established a new global defined contribution plan to provide retirement benefits to non-U.S. expatriate employees who may have otherwise obtained benefits under the TCN Plan.

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Net periodic benefit cost for the Domestic Plans and the TCN Plan includes the following components:

NOTE 5—DERIVATIVE FINANCIAL INSTRUMENTS

We enter into derivative financial instruments primarily to hedge certain firm purchase commitments and forecasted transactions denominated in foreign currencies. We record these contracts at fair value on our consolidated balance sheets. Depending on the hedge designation at the inception of the contract, the related gains and losses on these contracts are either: (1) deferred as a component of AOCI until the hedged item is recognized in earnings; (2) offset against the change in fair value of the hedged firm commitment through earnings; or (3) recognized immediately in earnings. At the inception and on an ongoing basis, we assess the hedging relationship to determine its effectiveness in offsetting changes in cash flows or fair value attributable to the hedged risk. We exclude from our assessment of effectiveness the portion of the fair value of the forward contracts attributable to the difference between spot exchange rates and forward exchange rates. The ineffective portion of a derivative’s change in fair value and any portion excluded from the assessment of effectiveness are immediately recognized in earnings. Gains and losses on derivative financial instruments that are immediately recognized in earnings are included as a component of gain (loss) on foreign currency—net in our condensed consolidated statements of income.

At September 30, 2013, the majority of our foreign currency forward contracts were designated as cash flow hedging instruments. In addition, we deferred approximately $33.2 million of net losses on these derivative financial instruments in AOCI, and we expect to reclassify approximately $10.2 million of deferred losses out of AOCI by September 30, 2014, as hedged items are recognized in earnings.

The notional value of our outstanding derivative contracts totaled $1.3 billion at September 30, 2013, with maturities extending through 2017. Of this amount, approximately $721.6 million is associated with various foreign currency expenditures we expect to incur on one of our Asia Pacific segment EPCI projects. These instruments consist of contracts to purchase or sell foreign-denominated currencies. At September 30, 2013, the fair value of these contracts was in a net liability position totaling $17.6 million.

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The following tables summarize our derivative financial instruments:

Asset and Liability Derivatives

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Our Level 2 investments consist primarily of commercial paper, corporate notes and bonds, asset-backed commercial paper notes backed by a pool of mortgage-backed securities and mutual funds. The fair value of our Level 2 investments was determined using a market approach which is based on quoted prices and other information for similar or identical instruments.

Our Level 3 investment consists of asset-backed commercial paper notes backed by a pool of mortgage-backed securities. The fair value of this Level 3 investment was based on the calculation of an overall weighted-average valuation, using the prices of the underlying individual securities. Individual securities in the pool were valued based on market observed prices, where available. If market prices were not available, prices of similar securities backed by similar assets were used.

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Unrealized Losses on Investments

Our net unrealized loss on investments was $1.7 million and $2.4 million at September 30, 2013 and December 31, 2012, respectively. The investments in an unrealized loss position for twelve months or longer are asset-backed and mortgage-backed obligations. These investments have generally shown a positive trend and continue to perform, and we currently do not have the intent to sell these securities before their anticipated recovery. Based on our analysis of these investments, we believe that none of our available-for-sale securities were other than temporarily impaired as of September 30, 2013. The amount of investments in an unrealized loss position for less than twelve months was not significant for either of the periods presented. The following is a summary of our available-for-sale securities: