TENARIS S.A.

HALF-YEAR REPORT 2017

 

 

 

TABLE OF CONTENTS

INTERIM MANAGEMENT REPORT

CERTAIN DEFINED TERMS

Unless otherwise specified or if the context so requires:

·	References in this half-year report to "the Company" are exclusively to Tenaris S.A., a Luxembourg public limited liability company (société anonyme).

·	References in this half-year report to "Tenaris", "we", "us" or "our" are to Tenaris S.A. and its consolidated subsidiaries.

·	References in this half-year report to "San Faustin" are to San Faustin S.A., a Luxembourg public limited liability company (société anonyme) and the Company's controlling shareholder.

·	"Shares" refers to ordinary shares, par value $1.00, of the Company.

·	"ADSs" refers to the American Depositary Shares, which are evidenced by American Depositary Receipts, and represent two Shares each.

·	"OCTG" refers to oil country tubular goods.

·	"tons" refers to metric tons; one metric ton is equal to 1,000 kilograms, 2,204.62 pounds, or 1.102 U.S. (short) tons.

·	"billion" refers to one thousand million, or 1,000,000,000.

·	"U.S. dollars", "US$", "USD" or "$" each refers to the United States dollar.

 

PURPOSE

This half-year report for the six-month period ended June 30, 2017 has been prepared in compliance with Article 4 of the Luxembourg Transparency Law of 11 January 2008, and should be read in conjunction with the annual report for the year ended December 31, 2016 (including the financial statements included therein) and the unaudited consolidated condensed interim financial statements included in this half-year report.

PRESENTATION OF CERTAIN FINANCIAL AND OTHER INFORMATION

Accounting Principles

We prepare our consolidated financial statements in conformity with International Financial Reporting Standards as issued by the International Accounting Standards Board and adopted by the European Union, or IFRS.

We publish consolidated financial statements expressed in U.S. dollars. The unaudited consolidated condensed interim financial statements included in this half-year report have been prepared in accordance with IAS 34, "Interim Financial Reporting". These unaudited consolidated condensed interim financial statements should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2016, which have been prepared in accordance with IFRS. See Note 2 "Accounting Policies and Basis of Presentation" to our unaudited consolidated condensed interim financial statements included in this half-year report.

The unaudited consolidated condensed interim financial statements included in this half-year report have been reviewed by PricewaterhouseCoopers Société coopérative, Cabinet de révision agréé, for purposes of complying with the requirements of the different jurisdictions where the Company is publicly listed.

Whenever necessary, certain comparative amounts have been reclassified to conform to changes in presentation in the current period.

Rounding

Certain monetary amounts, percentages and other figures included in this half-year report have been subject to rounding adjustments. Accordingly, figures shown as totals in certain tables may not be the arithmetic aggregation of the figures that precede them, and figures expressed as percentages in the text may not total 100% or, as applicable, when aggregated may not be the arithmetic aggregation of the percentages that precede them.

CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS

This half-year report and any other oral or written statements made by us to the public may contain "forward-looking statements". Forward looking statements are based on management's current views and assumptions and involve known and unknown risks that could cause actual results, performance or events to differ materially from those expressed or implied by those statements.

We use words such as "aim", "will likely result", "will continue", "contemplate", "seek to", "future", "objective",

"goal", "should", "will pursue", "anticipate", "estimate", "expect", "project", "intend", "plan", "believe" and words and terms of similar substance to identify forward-looking statements, but they are not the only way we identify such statements. All forward-looking statements are management's present expectations of future events and are subject to a number of factors and uncertainties that could cause actual results to differ materially from those described in the forward-looking statements. These factors include the risks related to our business discussed under "Principal Risks and Uncertainties", among them, the following:

·	our ability to implement our business strategy or to grow through acquisitions, joint ventures and other investments;

·	the competitive environment in our business and our industry;

·	our ability to price our products and services in accordance with our strategy;

·	our ability to absorb cost increases and to secure supplies of essential raw materials and energy;

·	our ability to adjust fixed and semi-fixed costs to fluctuations in product demand;

·	trends in the levels of investment in oil and gas exploration and drilling worldwide; and

·	general macroeconomic and political conditions and developments in the countries in which we operate or distribute pipes.

By their nature, certain disclosures relating to these and other risks are only estimates and could be materially different from what actually occurs in the future. As a result, actual future gains or losses that may affect our financial condition and results of operations could differ materially from those that have been estimated. You should not place undue reliance on the forward-looking statements, which speak only as of the date of this half-year report. Except as required by law, we are not under any obligation, and expressly disclaim any obligation to, update or alter any forward-looking statements, whether as a result of new information, future events or otherwise.

COMPANY OVERVIEW

We are a leading global manufacturer and supplier of steel pipe products and related services for the world's energy industry and for other industrial applications. Our customers include most of the world's leading oil and gas companies as well as engineering companies engaged in constructing oil and gas gathering, transportation, processing and power generation facilities. Our principal products include casing, tubing, line pipe, and mechanical and structural pipes.

Over the last two decades, we have expanded our business globally through a series of strategic investments. We now operate an integrated worldwide network of steel pipe manufacturing, research, finishing and service facilities with industrial operations in the Americas, Europe, Asia and Africa and a direct presence in most major oil and gas markets.

Our mission is to deliver value to our customers through product development, manufacturing excellence, and supply chain management. We seek to minimize risk for our customers and help them reduce costs, increase flexibility and improve time-to-market. Our employees around the world are committed to continuous improvement by sharing knowledge across a single global organization.

For more information on the Company, including its competitive strengths, business segments and products see our annual report for the year ended December 31, 2016, and for a discussion and analysis of our financial condition and results of operations see "Business overview - Operating and Financial Review and Prospects" in this half-year report.

PRINCIPAL RISKS AND UNCERTAINTIES

We face certain risks associated to our business and the industry in which we operate. We are a global steel pipe manufacturer with a strong focus on manufacturing products and related services for the oil and gas industry. Demand for our products depends primarily on the level of exploration, development and production activities of oil and gas companies which is affected by current and expected future prices of oil and natural gas. Several factors, such as the supply and demand for oil and gas, and political and global economic conditions, affect, and may continue to affect, these prices. Furthermore, fluctuations in industry inventory levels may adversely affect our sales and revenues. When oil and gas prices fall, oil and gas companies are generally expected to hold or reduce purchases of additional steel pipe products. Performance may be further affected by changes in governmental policies, the impact of credit restrictions on our customers' ability to perform their payment obligations with us, and any adverse economic, political or social developments in our major markets. Furthermore, competition in the global market for steel pipe products may cause us to lose market share and hurt our sales and profitability. In addition, there is an increased risk that unfairly-traded steel pipe imports in markets in which Tenaris produces and sells its products may affect Tenaris's market share, deteriorate the pricing environment and hurt sales and profitability. Profitability may also be hurt if increases in the cost of raw materials, energy and other costs and limitations or disruptions to the supply of raw materials and energy, resulting in higher costs of production cannot be offset by higher selling prices or if the limited availability of such resources forces us to curtail production. Low levels of capacity utilization could also affect our results of operations and financial conditions. A recession in the developed countries, a cooling of emerging market economies or an extended period of below-trend growth in the economies that are major consumers of steel pipe products would likely result in reduced demand of our products, adversely affecting our revenues, profitability and financial condition.

We have significant operations in various countries, including Argentina, Brazil, Canada, Colombia, Italy, Japan, Mexico, Nigeria, Romania and the United States, and we sell our products and services throughout the world. Therefore, like other companies with worldwide operations, our business and operations have been, and could in the future be, affected from time to time to varying degrees by political, economic and social developments and changes in, laws and regulations. These developments and changes may include, among others, nationalization, expropriations or forced divestiture of assets; restrictions on production, imports and exports, interruptions in the supply of essential energy inputs; restrictions on the exchange or transfer of currency, repatriation of capital, or payment of dividends or other contractual obligations; inflation; devaluation; war or other international conflicts; civil unrest and local security concerns, including high incidences of crime and violence involving drug trafficking organizations that threaten the safe operation of our facilities and operations; direct and indirect price controls; tax increases and changes in the interpretation, application or enforcement of tax laws and other retroactive tax claims or challenges; changes in laws, norms and regulations; cancellation of contract rights; and delays or denials of governmental approvals. As a global company, a portion of our business is carried out in currencies other than the U.S. dollar, which is the Company's functional and presentation currency. As a result, we are exposed to foreign exchange rate risk, which could adversely affect our financial position and results of operations. In addition, we may be subject to regulatory risks associated with our import and export activities.

In May 2009, Venezuela nationalized the Company's majority-owned subsidiaries TAVSA - Tubos de Acero de Venezuela S.A. ("Tavsa") and, Matesi Materiales Siderúrgicos S.A ("Matesi"), and Complejo Siderúrgico de Guayana, C.A ("Comsigua"), in which the Company has a non-controlling interest (collectively, the "Venezuelan Companies"). On January 29, 2016, an arbitral award upheld Tenaris's claim that Venezuela had expropriated their investments in Matesi in violation of Venezuelan law as well as the bilateral investment treaties entered into by Venezuela with the Belgium-Luxembourg Economic Union and Portugal, granted compensation in the amount of $87.3 million for the breaches and ordered Venezuela to pay an additional amount of $85.5 million in pre-award interest, aggregating to a total award of $172.8 million, payable in full and net of any applicable Venezuelan tax, duty or charge. The tribunal granted Venezuela a grace period of six months from the date of the award to make payment in full of the amount due without incurring post-award interest, and resolved that if no, or no full, payment was made by then, post-award interest would apply at the rate of 9% per annum.

On December 12, 2016, an arbitral award upheld Tenaris's claim that Venezuela had expropriated their investments in Tavsa and Comsigua in violation of bilateral investment treaties entered into by Venezuela with the Belgium-Luxembourg Economic Union and Portugal, granted compensation in the amount of $137 million and ordered Venezuela to reimburse Tenaris $3.3 million in legal fees and ICSID administrative costs and to pay interest from April 30, 2008 until the day of effective payment at a rate equivalent to LIBOR + 4% per annum.

However, we can give no assurance that the Venezuelan government will pay a fair and adequate compensation for our interest in Tavsa, Matesi and Comsigua, or that any such compensation will be freely convertible into or exchangeable for foreign currency.For further information on the nationalization of the Venezuelan subsidiaries, see note 31 "Nationalization of Venezuelan Subsidiaries" to our audited consolidated financial statements for the year ended December 31, 2016 and note 16 "Nationalization of Venezuelan Subsidiaries" to our unaudited consolidated condensed interim financial statements as of June 30, 2017 included in this half-year report.

A key element of our business strategy is to develop and offer higher value-added products and services and to continuously identify and pursue growth-enhancing strategic opportunities. Even if we successfully implement our business strategy, it may not yield the expected results. We must necessarily base any assessment of potential acquisitions, joint ventures and investments, on assumptions with respect to operations, profitability and other matters that may subsequently prove to be incorrect. Failure to successfully implement our strategy, or to integrate future acquisitions and strategic investments, or to sell acquired assets or business unrelated to our business under favorable terms and conditions, could affect our ability to grow, our competitive position and our sales and profitability.

We may be required to record a significant charge to earnings if we must reassess our goodwill or other assets as a result of changes in assumptions underlying the carrying value of certain assets, particularly as a consequence of deteriorating market conditions. At June 30, 2017 we had $1,292 million in goodwill corresponding mainly to the acquisition of Hydril, in 2007 and Maverick, in 2006. If our management was to determine in the future that the goodwill or other assets were impaired, particularly as a consequence of deteriorating market conditions, we would be required to recognize a non-cash charge to reduce the value of these assets, which would adversely affect our results of operations.

Potential environmental, product liability and other claims arising from the inherent risks associated with the products we sell and the services we render, including well failures, line pipe leaks, blowouts, bursts and fires, that could result in death, personal injury, property damage, environmental pollution or loss of production could create significant liabilities for us. Environmental laws and regulations may, in some cases, impose strict liability (even joint and several strict liability) rendering a person liable for damages to natural resources or threats to public health and safety without regard to negligence or fault. In addition, we are subject to a wide range of local, provincial and national laws, regulations, permit requirements and decrees relating to the protection of human health and the environment, including laws and regulations relating to hazardous materials and radioactive materials and environmental protection governing air emissions, water discharges and waste management. Laws and regulations protecting the environment have become increasingly complex and more stringent and expensive to implement in recent years. The cost of complying with such regulations is not always clearly known or determinable since some of these laws have not yet been promulgated or are under revision. These costs, along with unforeseen environmental liabilities, may increase our operating costs or negatively impact our financial condition and profitability.

We conduct business in certain countries known to experience governmental corruption. Although we are committed to conducting business in a legal and ethical manner in compliance with local and international statutory requirements and standards applicable to our business, there is a risk that our employees or representatives may take actions that violate applicable laws and regulations that generally prohibit the making of improper payments to foreign government officials for the purpose of obtaining or keeping business, including laws relating to the 1997 OECD Convention on Combating Bribery of Foreign Public Officials in International Business Transactions such as the U.S. Foreign Corrupt Practices Act, or FCPA.

As a holding company, our ability to pay cash dividends and make other payments to us depends on the results of operations and financial condition of our subsidiaries, which could be restricted by legal, contractual or other limitations, including exchange controls or transfer restrictions, and other agreements and commitments of our subsidiaries.

The Company's controlling shareholder may be able to take actions that do not reflect the will or best interests of other shareholders.

BUSINESS OVERVIEW

Operating and Financial Review and Prospects

The following discussion and analysis should be read in conjunction with the audited consolidated financial statements and the related notes included in our annual report for the year ended December 31, 2016, and is based on, and should be read in conjunction with, the unaudited consolidated condensed interim financial statements for the six-month period ended June 30, 2017, included in this half-year report.

Certain information contained in this discussion and analysis and presented elsewhere in this half-year report, including information with respect to our plans and strategy for our business, includes forward-looking statements that involve risks and uncertainties. See "Cautionary Statement Concerning Forward-Looking Statements" in this half-year report. In evaluating this discussion and analysis, you should specifically consider the various risk factors identified in "Principal Risks and Uncertainties", other risk factors identified elsewhere in this half-year report and other factors that could cause results to differ materially from those expressed in such forward-looking statements.

Market Background and Outlook

The recovery in shale drilling in the USA and Canada continued at a rapid pace in the first half of the year but is now slowing down as some operators revise their drilling plans for the second half following a dip in oil prices below $50 per barrel in June. In the rest of the world, recovery remains more elusive, as oil and gas companies continue to focus on strengthening cash flow and their financial position. In Latin America, however, drilling activity in Argentina is starting to pick up with various operators moving forward with investments in the Vaca Muerta shale play, and recent offshore discoveries in Mexico will provide further impetus to the energy reform program.

In the second half, we expect growth in demand from Rig Direct™ customers in North America, supported by the start up of our Bay City mill, and in Argentina, while, in the third quarter, we will have slower sales in the Middle East and Europe. Pricing conditions continue to improve gradually but the recent rise in raw material costs will impact our cost of sales, dampening margin improvements. Our EBITDA should grow, particularly in the fourth quarter, when our volumes will be enhanced by shipments for East Mediterranean offshore gas pipelines.

Results of Operations

Unaudited consolidated condensed interim income statement

Selected consolidated financial position data

Six-month period ended June 30, 2017, compared to six-month period ended June 30, 2016

Summary

Our sales in the first half of 2017 increased 6% compared to the first half of 2016, mainly due to a strong increase in demand in the United States and Canada, partially offset by lower sales in South America and in the Middle East and Africa. EBITDA increased 36% to $399 million in the first half of 2017 compared to $292 million in the first half of the previous year, following an increase in sales and an improvement in the EBITDA margin, from 12.9% to 16.6%. EBITDA includes severance charges, due to the adjustment of the workforce, which amounted to $22 million in the first half of 2017 and $56 million in the first half of 2016. Net income attributable to owners of the parent during the first half of 2017 was $280 million or $0.47 per ADS, which compares with $5 million or $0.01 per ADS in the first half of 2016. The improvement in net income mainly reflects a better operating environment, where a 22% increase in shipments improved the utilization of production capacity and therefore the absorption of fixed costs, a reduction in severance costs, a positive income tax of $55 million reflecting primarily the effect of the Mexican peso revaluation on the tax base used to calculate deferred taxes at our Mexican subsidiaries which have the U.S. dollar as their functional currency, and a gain of $90 million from the sale of Republic Conduit.

Cash flow used in operations amounted to $7 million during the first half of 2017, including an increase in working capital of $365 million. Following a dividend payment of $331 million in May 2017, and capital expenditures of $294 million during the first half of 2017, we maintained a positive net cash position (i.e., cash, other current investments and fixed income investments held to maturity less total borrowings) of $1.1 billion at the end of June 2017, including the $328 million we collected from the sale of Republic Conduit.

The following table shows our net sales by business segment for the periods indicated below:

Tubes

The following table indicates for our Tubes business segment, sales volumes of seamless and welded pipes for the

periods indicated below:

The following table indicates, for our Tubes business segment, net sales by geographic region, operating income and operating income as a percentage of net sales for the periods indicated below:

Net sales of tubular products and services increased 7% to $2,260 million in the first half of 2017, compared to $2,115 million in the first half of 2016, as a result of a 22% increase in shipment volumes partially offset by a 13% decline in average selling prices. Sales grew due to a strong increase in demand in the USA and Canada, partially offset by lower sales in South America and in the Middle East and Africa. In the first half of 2017, the average number of active drilling rigs, or rig count, in the United States and Canada averaged 1,022, a 72% increase when compared to the 594 average in the first half of 2016. In the rest of the world the rig count declined 3% year on year, from 979 in the first half of 2016 to 948 in the first half of 2017.

Operating results from tubular products and services increased from a loss of $44 million in the first half of 2016, to a gain of $76 million in the first half of 2017. Results improved following a 22% increase in shipment volumes, increasing sales and the utilization of production capacity and therefore the absorption of fixed costs. Additionally, severance charges were lower as market conditions improved.

Others

The following table indicates, for our Others business segment, net sales, operating income and operating income as a percentage of net sales for the periods indicated below:

Net sales of other products and services decreased 6% to $137 million in the first half of 2017, compared to $146 million in the first half of 2016, mainly due to lower sales of industrial equipment in Brazil.

Operating income from other products and services decreased 6%, in line with the decline in sales as margins remained flat.

Selling, general and administrative expenses, or SG&A, amounted to $622 million in the first half of 2017 and $612 million in the first half of 2016, representing 26% of sales in 2017 and 27% in 2016. Direct selling expenses, like freights, increased due to higher shipment volumes and were partially offset by lower labor costs (lower severance costs). Amortization of intangibles also declined following the complete amortization of Hydril intangibles acquired ten years ago.

Financial results amounted to a loss of $20 million in the first half of 2017, compared to a loss of $5 million in the first half of 2016. The main reason for the loss in the first half of 2017 is an net foreign exchange transactions loss of $33 million, mainly due to the Euro appreciation on Euro denominated intercompany liabilities, fully offset in the currency translation reserve in equity.

Equity in earnings of non-consolidated companies generated a gain of $65 million in the first half of 2017, compared to a gain of $30 million in the first half of 2016. These results are mainly derived from our equity investment in Ternium (NYSE:TX).

Income tax amounted to a gain of $55 million in the first half of 2017, compared to a gain of $4 million in the first half of 2016. In the first half of 2017 this result reflects primarily the effect of the Mexican peso revaluation on the tax base used to calculate deferred taxes at our Mexican subsidiaries which have the U.S. dollar as their functional currency.

Results attributable to non-controlling interests amounted to a loss of $1 million in the first half of 2017, compared to a gain of $14 million in the first half of 2016. Results during the first half of 2016 were mainly attributable to our pipe coating subsidiary in Nigeria.

Liquidity and Capital Resources

The following table provides certain information related to our cash generation and changes in our cash and cash

equivalents position for the periods indicated below:

Net cash used in operations during the first half of 2017 amounted to $7 million (net of an increase in working capital of $365 million related to the increase in shipments and production), compared to net cash provided of $689 million in the first half of 2016 (including working capital reductions of $410 million).

Capital expenditures amounted to $294 million in the first half of 2017, compared to $441 million in the first half of 2016, as we continue progressing in the construction of the greenfield seamless facility in Bay City, Texas.

Following a dividend payment of $331 million in May 2017, our financial position at June 30, 2017, amounted to a net cash position (i.e., cash, other current investments and fixed income investments held to maturity less total borrowings) of $1.1 billion, including the $328 million we collected from the sale of Republic Conduit.

OTHER SIGNIFICANT EVENTS OF THE PERIOD

Annual General Meeting of Shareholders

On May 3, 2017, the Company's annual general shareholders' meeting approved all resolutions on its agenda.

Among other resolutions adopted at the meeting, the shareholders approved the consolidated financial statements as of and for the year ended December 31, 2016, and the annual accounts as at December 31, 2016, and acknowledged the related management and independent auditors' reports and certifications.

The meeting also approved the payment of a dividend for the year ended December 31, 2016, of $0.41 per share (or $0.82 per ADS), or approximately $484 million, which includes the interim dividend of $0.13 per share (or $0.26 per ADS) paid in November 2016. Tenaris paid the balance of the annual dividend in the amount of $0.28 per share ($0.56 per ADS), or approximately $331 million in May 2017.

The annual general meeting decided to increase the number of members of the board of directors to ten (10), by electing Mr. Yves Speeckaert and re-electing Messrs. Roberto Bonatti, Carlos Condorelli, Roberto Monti, Gianfelice Mario Rocca, Paolo Rocca, Jaime Serra Puche, Alberto Valsecchi, Amadeo Vázquez y Vázquez and Guillermo Vogel, each to hold office until the meeting that will be convened to decide on the 2017 accounts.

The board of directors subsequently confirmed and re-appointed Amadeo Vázquez y Vázquez, Jaime Serra Puche and Roberto Monti as members of Tenaris's audit committee, with Mr. Vázquez y Vázquez to continue as chairman. All three members of the audit committee qualify as independent directors under the articles and applicable law.

The meeting appointed PricewaterhouseCoopers Société coopérative, Cabinet de révision agréé (member firm of PwC International Limited) as Tenaris's independent auditors for the fiscal year ending December 31, 2017.

Sale of North American Electric Conduit Business to Nucor

On December 15, 2016, Tenaris entered into an agreement with Nucor Corporation (NC) pursuant to which it has sold to NC the steel electric conduit business in North America, known as Republic Conduit for an amount of $328 million (net of transaction costs). The sale was completed  on January 19, 2017,  with effect from January 20, 2017. The result of this transaction was an after-tax gain of $90 million, calculated as the net proceeds of the sale less the book value of net assets held for sale, the corresponding tax effect and related expenses.

RELATED PARTY TRANSACTIONS

Tenaris is a party to several related party transactions, which include, among others, purchases and sales of goods (including steel pipes, flat steel products, steel bars, raw materials, gas and electricity) and services (including engineering services and related services) from or to entities controlled by San Faustin or in which San Faustin holds significant interests. Material related party transactions are subject to the review of the audit committee of the Company's board of directors and the requirements of the Company's articles of association and Luxembourg law. For further detail on Tenaris's related party transactions, see Note 14 "Related party transactions" to our unaudited consolidated condensed interim financial statements included in this half-year report.

MANAGEMENT CERTIFICATION

We confirm, to the best of our knowledge, that:

1.

the unaudited consolidated condensed interim financial statements prepared in conformity with International Financial Reporting Standards included in this half year report, give a true and fair view of the assets, liabilities, financial position and profit or loss of Tenaris S.A. and its consolidated subsidiaries, taken as a whole; and

2.

the interim management report included in this half year report, includes a fair review of the important events that have occurred during the six-month period ended June 30, 2017, and their impact on the unaudited consolidated condensed interim financial statements for such period, material related party transactions and a description of the principal risks and uncertainties they face.

/s/ Paolo Rocca

Chief Executive Officer

Paolo Rocca

August 2, 2017

/s/ Edgardo Carlos

Chief Financial Officer

Edgardo Carlos

August 2, 2017

CONSOLIDATED CONDENSED INTERIM FINANCIAL STATEMENTS

JUNE 30, 2017

Report of Independent Registered Public Accounting Firm

To the Board of Directors of

Tenaris S.A.

We have reviewed the accompanying consolidated condensed interim statement of financial position of Tenaris S.A. and its subsidiaries as of 30 June 2017, and the related consolidated condensed interim statements of income and of comprehensive income for each of the three-month and six-month periods
ended 30 June 2017 and 2016, and the consolidated condensed interim statements of changes in equity and of cash flows for the six-month periods ended 30 June 2017 and 2016. These consolidated condensed interim 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 (United States), 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 accompanying consolidated condensed interim financial statements for them to be in conformity with International Accounting Standard 34 "Interim Financial Reporting" as issued by the International Accounting Standards Board and adopted by the European Union.

We previously audited in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated statement of financial position as of 31 December 2016, and the related consolidated statements of income, of comprehensive income, of changes in equity and of cash flows for the year then ended (not presented herein), and in our report dated 22 February 2017, we expressed an unqualified opinion on those consolidated financial statements. In our opinion, the information set forth in the accompanying consolidated condensed interim statement of financial position as of 31 December 2016, is fairly stated in all material respects in relation to the consolidated statement of financial position from which it has been derived.

PricewaterhouseCoopers, Société coopérative                                  Luxembourg, 2 August 2017

Represented by

Fabrice Goffin

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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CONSOLIDATED CONDENSED INTERIM INCOME STATEMENT

 (1) Each ADS equals two shares.

CONSOLIDATED CONDENSED INTERIM STATEMENT OF COMPREHENSIVE INCOME

The accompanying notes are an integral part of these Consolidated Condensed Interim Financial Statements. These Consolidated Condensed Interim Financial Statements should be read in conjunction with our audited Consolidated Financial Statements and notes for the fiscal year ended December 31, 2016.

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CONSOLIDATED CONDENSED INTERIM STATEMENT OF FINANCIAL POSITION

The accompanying notes are an integral part of these Consolidated Condensed Interim Financial Statements. These Consolidated Condensed Interim Financial Statements should be read in conjunction with our audited Consolidated Financial Statements and notes for the fiscal year ended December 31, 2016.

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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CONSOLIDATED CONDENSED INTERIM STATEMENT OF CHANGES IN EQUITY

(all amounts in thousands of U.S. dollars)

(1) The Company has an authorized share capital of a single class of 2.5 billion shares having a nominal value of USD1.00 per share. As of June 30, 2017 and 2016 there were 1,180,536,830 shares issued. All issued shares are fully paid.

(2) Other reserves include mainly the result of transactions with non-controlling interest that do not result in a loss of control, the remeasurement of post-employment benefit obligations and the changes in value of cash flow hedges and in available for sale financial instruments.

(3) The Distributable Reserve and Retained Earnings as of June 30, 2017 calculated in accordance with Luxembourg Law are disclosed in Note 11.

The accompanying notes are an integral part of these Consolidated Condensed Interim Financial Statements. These Consolidated Condensed Interim Financial Statements should be read in conjunction with our audited Consolidated Financial Statements and notes for the fiscal year ended December 31, 2016.

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CONSOLIDATED CONDENSED INTERIM STATEMENT OF CASH FLOWS

The accompanying notes are an integral part of these Consolidated Condensed Interim Financial Statements. These Consolidated Condensed Interim Financial Statements should be read in conjunction with our audited Consolidated Financial Statements and notes for the fiscal year ended December 31, 2016.

NOTES TO THE CONSOLIDATED CONDENSED INTERIM FINANCIAL STATEMENTS

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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NOTES TO THE CONSOLIDATED CONDENSED INTERIM FINANCIAL STATEMENTS

(In the notes all amounts are shown in U.S. dollars, unless otherwise stated)

1	General information

Tenaris S.A. (the "Company") was established as a public limited liability company (société anonyme) under the laws of the Grand-Duchy of Luxembourg on December 17, 2001. The Company holds, either directly or indirectly, controlling interests in various subsidiaries in the steel pipe manufacturing and distribution businesses. References in these Consolidated Condensed Interim Financial Statements to "Tenaris" refer to Tenaris S.A. and its consolidated subsidiaries. A list of the principal Company's subsidiaries is included in Note 30 to the Company's audited Consolidated Financial Statements for the year ended December 31, 2016.

The Company's shares trade on the Buenos Aires Stock Exchange, the Italian Stock Exchange and the Mexican Stock Exchange; the Company's American Depositary Securities ("ADS") trade on the New York Stock Exchange.

These Consolidated Condensed Interim Financial Statements were approved for issuance by the Company's Board of Directors on August 2, 2017.

2	Accounting policies and basis of presentation

These Consolidated Condensed Interim Financial Statements have been prepared in accordance with IAS 34, "Interim Financial Reporting". The accounting policies used in the preparation of these Consolidated Condensed Interim Financial Statements are consistent with those used in the audited Consolidated Financial Statements for the year ended December 31, 2016. These Consolidated Condensed Interim Financial Statements should be read in conjunction with the audited Consolidated Financial Statements for the year ended December 31, 2016, which have been prepared in accordance with International Financial Reporting Standards ("IFRS") as issued by the International Accounting Standard Board ("IASB") and in conformity with IFRS as adopted by the European Union ("EU").

The preparation of Consolidated Condensed Interim Financial Statements in conformity with IFRS requires management to make certain accounting estimates and assumptions that might affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the balance sheet dates, and the reported amounts of revenues and expenses for the reported periods. Actual results may differ from these estimates.

Material inter-company transactions, balances and unrealized gains (losses) on transactions between Tenaris's subsidiaries have been eliminated in consolidation. However, since the functional currency of some subsidiaries is its respective local currency, some financial gains (losses) arising from inter-company transactions are generated. These are included in the Consolidated Condensed Interim Income Statement under Other financial results.

There were no changes in valuation techniques during the period and there have been no changes in any risk management policies since the year ended December 31, 2016.

Whenever necessary, certain comparative amounts have been reclassified to conform to changes in presentation in the current period.

Following the sale of the steel electric conduit business in North America, known as Republic Conduit, the results of the mentioned business are presented as discontinued operations in accordance with IFRS 5 "Non-current Assets Held for Sale and Discontinued Operations". Consequently, all amounts related to discontinued operations within each line item of the Consolidated Income Statement are reclassified into discontinued operations. The Consolidated Statement of Cash Flows includes the cash flows for continuing and discontinued operations, cash flows from discontinued operations and earnings per share are disclosed separately in Note 13, as well as additional information detailing net assets of disposal group classified as held for sale and discontinued operations.

None of the accounting pronouncements issued after December 31, 2016 and as of the date of these Consolidated Condensed Interim Financial Statements have a material effect on the Company's financial condition or result of operations.

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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Reportable operating segment

In the six-month period ended June 30, 2017, net income under management view amounted to $209.8 million, while under IFRS it amounted to $279.0 million. In addition to the amounts reconciled above, the main differences arise from the impact of functional currencies on financial result, deferred income taxes as well as the result of investment in non-consolidated companies and changes on the valuation of inventories according to cost estimation internally defined.

Geographical information

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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Allocation of net sales to geographical information is based on customer location. Allocation of depreciation and amortization is based on the geographical location of the underlying assets.

There are no revenues from external customers attributable to the Company's country of incorporation (Luxembourg). For geographical information purposes, "North America" comprises Canada, Mexico and the United States; "South America" comprises principally Argentina, Brazil and Colombia; "Europe" comprises principally Italy, Norway and Romania; "Middle East and Africa" comprises principally Kazakhstan, United Arab Emirates, Nigeria and Saudi Arabia and "Asia Pacific" comprises principally Thailand, China and Japan.

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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(*)The six-month period ended June 2017 includes the negative impact from Euro appreciation against the U.S. dollar on Euro denominated intercompany liabilities in subsidiaries with functional currency U.S. Dollar, largely offset by an increase in currency translation adjustment reserve from an Italian subsidiary.

(**) The six-month period ended June 2016 includes the negative impact from Brazilian Real appreciation against the U.S. dollar on hedging instruments and of Cash and cash equivalent and Other investments denominated in U.S. dollar in subsidiaries which functional currency is the Brazilian real, partially offset by an increase in currency translation adjustment reserve from the Brazilian subsidiaries.

On May 3, 2017, the Company's Shareholders approved an annual dividend in the amount of $0.41 per share ($0.82 per ADS). The amount approved included the interim dividend previously paid in November 23, 2016 in the amount of $0.13 per share ($0.26 per ADS). The balance, amounting to $0.28 per share ($0.56 per ADS), was paid on May 24, 2017. In the aggregate, the interim dividend paid in November 2016 and the balance paid in May 2017 amounted to approximately $484.0 million.

On May 4, 2016 the Company's Shareholders approved an annual dividend in the amount of $0.45 per share ($0.90 per ADS). The amount approved included the interim dividend previously paid in November 25, 2015 in the amount of $0.15 per share ($0.30 per ADS). The balance, amounting to $0.30 per share ($0.60 per ADS), was paid on May 25, 2016. In the aggregate, the interim dividend paid in November 2015 and the balance paid in May 2016 amounted to approximately $531.2 million.

(*) Mainly due to the progress in the construction of the greenfield seamless facility in Bay City, Texas.

 (*) Related to investments in companies under cost method.

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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Contingencies

This note should be read in conjunction with Note 25 to the Company's audited Consolidated Financial Statements for the year ended December 31, 2016.

Tenaris is from time to time subject to various claims, lawsuits and other legal proceedings, including customer claims, in which third parties are seeking payment for alleged damages, reimbursement for losses or indemnity. Some of these claims, lawsuits and other legal proceedings involve highly complex issues, and often these issues are subject to substantial uncertainties. Accordingly, potential liability with respect to a large portion of such claims, lawsuits and other legal proceedings cannot be estimated with certainty. Management, with the assistance of legal counsel, periodically reviews the status of each significant matter and assesses potential financial exposure. If a potential loss from a claim, lawsuit or proceeding is considered probable and the amount can be reasonably estimated, a provision is recorded. Accruals for loss contingencies reflect a reasonable estimate of the losses to be incurred based on information available to management as of the date of preparation of the financial statements, and take into consideration litigation and settlement strategies. The Company believes that the aggregate provisions recorded for potential losses in these financial statements are adequate based upon currently available information. However, if management's estimates prove incorrect, current reserves could be inadequate and Tenaris could incur a charge to earnings which could have a material adverse effect on Tenaris's results of operations, financial condition, net worth and cash flows.

Set forth below is a description of Tenaris's material ongoing legal proceedings:

§	Tax assessment in Italy

Dalmine, an Italian subsidiary of Tenaris, received on December 24, 2012 a tax assessment from the Italian tax authorities related to allegedly omitted withholding tax on dividend payments made in 2007. The assessment, which was for an estimated amount of EUR297 million (approximately $339 million), comprising principal, interest and penalties, was appealed with the first-instance tax court in Milan. In February 2014, the first-instance tax court issued its decision on this tax assessment, partially reversing the assessment and lowering the claimed amount to approximately EUR9 million (approximately $10.3 million), including principal, interest and penalties. On October 2, 2014, the Italian tax authorities appealed against the second-instance tax court decision on the 2007 assessment. On June 12, 2015, the second-instance tax court accepted Dalmine's defense arguments and rejected the appeal by the Italian tax authorities, thus reversing the entire 2007 assessment and recognizing that the dividend payment was exempt from withholding tax. The Italian tax authorities have appealed the second-instance tax court decision before the Supreme Court.

On December 24, 2013, Dalmine received a second tax assessment from the Italian tax authorities, based on the same arguments as those in the first assessment, relating to allegedly omitted withholding tax on dividend payments made in 2008 – the last such distribution made by Dalmine. Dalmine appealed the assessment with the first-instance tax court in Milan. On January 27, 2016, the first-instance tax court rejected Dalmine's appeal. This first-instance ruling, which held that Dalmine is required to pay an amount of EUR225 million (approximately $257 million), including principal, interest and penalties, contradicts the first and second-instance tax court rulings in connection with the 2007 assessment. Dalmine obtained the suspension of the interim payment that would have been due, based on the first-instance decision, through the filing with the tax authorities of a bank guarantee, and appealed the January 2016 ruling with the second-instance tax court. The hearing in the second instance tax court has been called on September 25, 2017.

Tenaris continues to believe that Dalmine has correctly applied the relevant legal provisions and based on, among other things, the tax court decisions on the 2007 assessment and the opinion of legal counsel, Tenaris believes that it is not probable that the ultimate resolution of either the 2007 or the 2008 tax assessment will result in a material obligation.

§	CSN claims relating to the January 2012 acquisition of Usiminas shares

In 2013, Confab Industrial S.A., a Brazilian subsidiary of the Company ("Confab")was notified of a lawsuit filed in Brazil by Companhia Siderúrgica Nacional (CSN) and various entities affiliated with CSN against Confab and the other entities that acquired a participation in Usiminas' control group in January 2012.

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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Contingencies (Cont.)

§	CSN claims relating to the January 2012 acquisition of Usiminas shares (Cont.)

The CSN lawsuit alleges that, under applicable Brazilian laws and rules, the acquirers were required to launch a tag-along tender offer to all non-controlling holders of Usiminas' ordinary shares for a price per share equal to 80% of the price per share paid in such acquisition, or BRL28.8, and seeks an order to compel the acquirers to launch an offer at that price plus interest. If so ordered, the offer would need to be made to 182,609,851 ordinary shares of Usiminas not belonging to Usiminas' control group, and Confab would have a 17.9% share in that offer.

On September 23, 2013, the first instance court dismissed the CSN lawsuit, and on February 8, 2017, the court of appeals maintained the understanding of the first instance court. On March 6, 2017, CSN filed a motion for clarification against the decision of the court of appeals, which was rejected on July 19, 2017. CSN may still appeal to the Superior Court of Justice or the Federal Supreme Court. For further information on the CSN lawsuit, see Note 25 to the Consolidated Financial Statements for the year ended December 31, 2016.

Tenaris continues to believe that all of CSN's claims and allegations are groundless and without merit, as confirmed by several opinions of Brazilian legal counsel, two decisions issued by the Brazilian securities regulator (CVM) in February 2012 and December 2016, and the first and second instance court decisions referred to above. Accordingly, no provision was recorded in these Consolidated Condensed Interim Financial Statements.

§	Veracel Celulose Accident Litigation

On September 21, 2007, an accident occurred in the premises of Veracel Celulose S.A. ("Veracel") in connection with a rupture in one of the tanks used in an evaporation system manufactured by Confab. The Veracel accident allegedly resulted in material damages to Veracel. Itaú Seguros S.A. ("Itaú"), Veracel's insurer at the time of the Veracel accident, initiated a lawsuit against Confab seeking reimbursement of damages paid to Veracel in connection with the Veracel accident. Veracel initiated a second lawsuit against Confab seeking reimbursement of the amount paid as insurance deductible in connection with the Veracel accident and other amounts not covered by insurance. Itaú and Veracel claim that the Veracel accident was caused by failures and defects attributable to the evaporation system manufactured by Confab. Confab believes that the Veracel accident was caused by the improper handling by Veracel's personnel of the equipment supplied by Confab in violation of Confab's instructions. The two lawsuits have been consolidated, and are now being considered by the 6th Civil Court of São Caetano do Sul; however, each lawsuit will be adjudicated through a separate ruling. Both proceedings are currently at evidentiary stage.

On March 10, 2016, a court-appointed expert issued its report on certain technical matters concerning the Veracel accident. Based upon a technical opinion received from a third-party expert, in August 2016, Confab filed its objections to the expert's report. Other parties have also filed their observations and/or opinions concerning the expert's report, which are currently subject to the court examination. As of June 30, 2017, the estimated amount of Itaú's claim is approximately BRL78 million (approximately $23.6 million), and the estimated amount of Veracel's claim is approximately BRL49.7 million (approximately $15.0 million), for an aggregate amount BRL127.7 million ($38.6 million). The final result of this claim depends largely on the court's evaluation of technical matters arising from the expert's opinion and objections presented by Confab. No provision has been recorded in these Consolidated Condensed Interim Financial Statements.

§	Petroamazonas Penalties

On January 22, 2016, Petroamazonas ("PAM"), an Ecuadorian state-owned oil company, imposed penalties to the Company's Uruguayan subsidiary, Tenaris Global Services S.A. ("TGS"), for its alleged failure to comply with delivery terms under a pipe supply agreement. The penalties amount to approximately $ 22.5 million as of the date hereof. Tenaris believes, based on the advice of counsel, that PAM has no legal basis to impose the penalties and that TGS has meritorious defenses against PAM. However, in light of the prevailing political circumstances in Ecuador, the Company cannot predict the outcome of a claim against a state-owned company and it is not possible to estimate the amount or range of loss in case of an unfavorable outcome.

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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Contingencies (Cont.)

§	Ongoing investigation

The Company has learned that Italian and Swiss authorities are investigating whether certain payments were made from accounts of entities presumably associated with affiliates of the Company to accounts controlled by an individual allegedly related with officers of Petróleo Brasileiro S.A. and whether any such payments were intended to benefit Confab. Any such payments could violate certain applicable laws, including the U.S. Foreign Corrupt Practices Act. The Company had previously reviewed certain of these matters in connection with an investigation by the Brazilian authorities related to "Operation Lava Jato" and the Audit Committee of the Company's Board of Directors has engaged external counsel in connection with a review of the alleged payments and related matters. In addition, the Company has voluntarily notified the U.S. Securities and Exchange Commission and the U.S. Department of Justice. The Company intends to share the results of this review with the appropriate authorities, and to cooperate with any investigations that may be conducted by such authorities. At this time, the Company cannot predict the outcome of these matters or estimate the range of potential loss or extent of risk, if any, to the Company's business that may result from resolution of these matters.

Commitments

Set forth is a description of Tenaris's main outstanding commitments:

§

A Tenaris company is a party to a contract with Nucor Corporation under which it is committed to purchase on a monthly basis a minimum volume of hot-rolled steel coils at prices that are negotiated annually by reference to prices to comparable Nucor customers. The contract became effective in January 2013 and will be in force until December 2017; provided, however, that either party may terminate the contract at any time after January 1, 2015 with a 12-month prior notice. Due to the weak pipe demand associated with the reduction in drilling activity, the parties entered into a temporary agreement pursuant to which application of the minimum volume requirements were suspended, and the company is temporarily allowed to purchase steel volumes in accordance with its needs. As of June 30, 2017, the estimated aggregate contract amount through December 31, 2017, calculated at current prices, is approximately $464.9 million.

§

A Tenaris company entered into various contracts with suppliers pursuant to which it committed to purchase goods and services for a total amount of approximately $110.1 million related to the investment plan to expand Tenaris's U.S. operations with the construction of a state-of-the-art seamless pipe mill in Bay City, Texas. As of June 30, 2017 approximately $1,551 million had already been invested.

Restrictions to the distribution of profits and payment of dividends

As of December 31, 2016, equity as defined under Luxembourg law and regulations consisted of:

At least 5% of the Company's net income per year, as calculated in accordance with Luxembourg law and regulations, must be allocated to the creation of a legal reserve equivalent to 10% of the Company's share capital. As of June 30, 2017, this reserve is fully allocated and additional allocations to the reserve are not required under Luxembourg law. Dividends may not be paid out of the legal reserve.

The Company may pay dividends to the extent, among other conditions, that it has distributable retained earnings calculated in accordance with Luxembourg law and regulations.

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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Restrictions to the distribution of profits and payment of dividends (Cont.)

At December 31, 2016, distributable amount under Luxembourg law totals $18.1 billion, as detailed below:

a)

Ternium

Ternium S.A. ("Ternium"), is a steel producer with production facilities in Mexico, Argentina, Colombia, United States and Guatemala and is one of Tenaris's main suppliers of round steel bars and flat steel products for its pipes business.

At June 30, 2017, the closing price of Ternium's ADSs as quoted on the New York Stock Exchange was $28.09 per ADS, giving Tenaris's ownership stake a market value of approximately $645.3 million (Level 1). At June 30, 2017, the carrying value of Tenaris's ownership stake in Ternium, based on Ternium's IFRS financial statements, was approximately $530.8 million.

b)

Usiminas

Usiminas is a Brazilian producer of high quality flat steel products used in the energy, automotive and other industries and it is Tenaris's principal supplier of flat steel in Brazil for its pipes and industrial equipment businesses.

As of June 30, 2017 the closing price of the Usiminas' ordinary and preferred shares, as quoted on the BM&FBovespa Stock Exchange, was BRL8.83 ($2.67) and BRL4.6 ($1.39), respectively, giving Tenaris's ownership stake a market value of approximately $99.2 million (Level 1). As that date, the carrying value of Tenaris's ownership stake in Usiminas was approximately $67.6 million.

c)	Techgen, S.A. de C.V. ("Techgen")

 

Techgen is a Mexican company that operates a natural gas-fired combined cycle electric power plant in the Pesquería area of the State of Nuevo León, Mexico. The company started producing energy on December 1, 2016 and is fully operational, with a power capacity of between 850 and 900 megawatts. As of June 30, 2017, Tenaris held 22% of Techgen's share capital, and its affiliates Ternium and Tecpetrol International S.A. (a wholly-owned subsidiary of San Faustin S.A., the controlling shareholder of both Tenaris and Ternium) held 48% and 30% respectively.

Techgen is a party to transportation capacity agreements for a purchasing capacity of 150,000 MMBtu/Gas per day starting on August 1, 2016 and ending on July 31, 2036, and a party to a contract for the purchase of power generation equipment and other services related to the equipment. As of June 30, 2017, Tenaris's exposure under these agreements amounted to $59.8 million and $5.3 million respectively.

Tenaris issued a corporate guarantee covering 22% of the obligations of Techgen under a syndicated loan agreement between Techgen and several banks for an aggregate amount of $760 million which has been used in the construction of the facility. The main covenants under the corporate guarantee are limitations on the sale of certain assets and compliance with financial ratios (e.g. leverage ratio). As of June 30, 2017, the facility agreement has been fully disbursed and, accordingly, the amount guaranteed by Tenaris was approximately $167.2 million. During the six-month period ended June 30, 2017, Techgen's shareholders made additional investments in Techgen, through subordinated loans, which in the case of Tenaris amounted to $9 million. As of June 30, 2017, the aggregate outstanding principal amount under these loans was $95.2 million.

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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On December 15, 2016, Tenaris entered into an agreement with Nucor Corporation (NC) pursuant to which it has sold to NC the steel electric conduit business in North America, known as Republic Conduit for an amount of $328 million (net of transaction costs). The sale was completed on January 19, 2017, with effect from January 20, 2017. The result of this transaction was an after-tax gain of $89.7 million, calculated as the net proceeds of the sale less the book value of net assets held for sale, the corresponding tax effect and related expenses.

Details of Conduit sale

The financial performances presented are relative to the 19 days of January 2017 and the six month period ended June 30, 2016.

The following table shows the current and non-current assets and liabilities of disposal group as at 31, December 2016 and the carrying amounts of assets and liabilities as at the date of sale.

Summarized cash flow information is as follows:

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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As of June 30, 2017:

§	San Faustin S.A., a Luxembourg société anonyme ("San Faustin"), owned 713,605,187 shares in the Company, representing 60.45% of the Company's capital and voting rights.

§	San Faustin owned all of its shares in the Company through its wholly-owned subsidiary Techint Holdings S.à r.l., a Luxembourg société à responsabilité limitée ("Techint"), who is the holder of record of the above-mentioned Tenaris shares.

§	Rocca & Partners Stichting Administratiekantoor Aandelen San Faustin, a Dutch private foundation (Stichting) ("RP STAK") held voting rights in San Faustin sufficient in number to control San Faustin.

§	No person or group of persons controls RP STAK.

Based on the information most recently available to the Company, Tenaris's directors and senior management as a group owned 0.10% of the Company's outstanding shares.

Transactions and balances disclosed as with "non-consolidated parties" are those with companies over which Tenaris exerts significant influence or joint control in accordance with IFRS, but does not have control. All other transactions and balances with related parties which are not non-consolidated parties and which are not consolidated are disclosed as "Other".

The following transactions were carried out with related parties:

Accounting policies for financial instruments have been applied to classify as either: loans and receivables, held-to-maturity, available-for-sale, or fair value through profit and loss. For financial instruments that are measured in the statement of financial position at fair value, IFRS 13 requires a disclosure of fair value measurements by level according to the following fair value measurement hierarchy:

Level 1 - Quoted prices (unadjusted) in active markets for identical assets or liabilities.

Level 2 - Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly (that is, as prices) or indirectly (that is, derived from prices).

Level 3 - Inputs for the asset or liability that are not based on observable market data (that is, unobservable inputs).

The following tables present the financial instruments by category and levels as of June 30, 2017 and December 31, 2016.

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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 (*) For further detail regarding Available for sale assets, see Note 16.

There were no transfers between Level 1 and 2 during the period.

The fair value of financial instruments traded in active markets is based on quoted market prices at the reporting date. A market is regarded as active if quoted prices are readily and regularly available from an exchange, dealer, broker, industry group, pricing service, or regulatory agency, and those prices represent actual and regularly occurring market transactions on an arm's length basis. The quoted market price used for financial assets held by Tenaris is the current bid price. These instruments are included in Level 1 and comprise primarily corporate and sovereign debt securities.

The fair value of financial instruments that are not traded in an active market (such as certain debt securities, certificates of deposits with original maturity of more than three months, forward and interest rate derivative instruments) is determined by using valuation techniques which maximize the use of observable market data when available and rely as little as possible on entity specific estimates. If all significant inputs required to value an instrument are observable, the instrument is included in Level 2. Tenaris values its assets and liabilities included in this level using bid prices, interest rate curves, broker quotations, current exchange rates, forward rates and implied volatilities obtained from market contributors as of the valuation date.

If one or more of the significant inputs are not based on observable market data, the instruments are included in Level 3. Tenaris values its assets and liabilities in this level using observable market inputs and management assumptions which reflect the Company's best estimate on how market participants would price the asset or liability at measurement date. Main balances included in this level correspond to Available for sale assets related to Tenaris's interest in Venezuelan companies under process of nationalization (see Note 16).

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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Estimation

Financial assets or liabilities classified as assets at fair value through profit or loss are measured under the framework established by the IASB accounting guidance for fair value measurements and disclosures.

The fair values of quoted investments are generally based on current bid prices. If the market for a financial asset is not active or no market is available, fair values are established using standard valuation techniques.

Some of Tenaris's investments are designated as held to maturity and measured at amortized cost. Tenaris estimates that the fair value of these financial assets is 100.7% of its carrying amount including interests accrued as of June 30, 2017.

The fair value of all outstanding derivatives is determined using specific pricing models that include inputs that are observable in the market or can be derived from or corroborated by observable data. The fair value of forward foreign exchange contracts is calculated as the net present value of the estimated future cash flows in each currency, based on observable yield curves, converted into U.S. dollars at the spot rate of the valuation date.

Borrowings are comprised primarily of fixed rate debt and variable rate debt with a short term portion where interest has already been fixed. They are classified under other financial liabilities and measured at their amortized cost. Tenaris estimates that the fair value of its main financial liabilities is approximately 99.7% of its carrying amount including interests accrued as of June 30, 2017 and as of December 31, 2016. Fair values were calculated using standard valuation techniques for floating rate instruments and comparable market rates for discounting flows.

In May 2009, within the framework of Decree Law 6058, Venezuela's President announced the nationalization of, among other companies, the Company's majority-owned subsidiaries TAVSA - Tubos de Acero de Venezuela S.A. ("Tavsa") and Matesi Materiales Siderúrgicos S.A ("Matesi"), and Complejo Siderúrgico de Guayana, C.A ("Comsigua"), in which the Company has a non-controlling interest (collectively, the "Venezuelan Companies"). Tenaris and its wholly-owned subsidiary Talta - Trading e Marketing Sociedad Unipessoal Lda ("Talta"), initiated arbitration proceedings against Venezuela before the ICSID in Washington D.C. in connection with these nationalizations. For further information, see Note 31 in the Company's audited Consolidated Financial Statements for the year ended December 31, 2016.

Matesi

On January 29, 2016, the tribunal released its award on the arbitration proceeding concerning the nationalization of Matesi. The award upheld Tenaris's and Talta's claim that Venezuela had expropriated their investments in Matesi in violation of Venezuelan law as well as the bilateral investment treaties entered into by Venezuela with the Belgium-Luxembourg Economic Union and Portugal. The award granted compensation in the amount of $87.3 million for the breaches and ordered Venezuela to pay an additional amount of $85.5 million in pre-award interest, aggregating to a total award of $172.8 million, payable in full and net of any applicable Venezuelan tax, duty or charge. The tribunal granted Venezuela a grace period of six months from the date of the award to make payment in full of the amount due without incurring post-award interest, and resolved that if no, or no full, payment was made by then, post-award interest would apply at the rate of 9% per annum.

On March 14, 2016, Venezuela requested the rectification of the award pursuant to article 49(2) of the ICSID Convention and ICSID Arbitration Rule 49. The tribunal denied Venezuela's request on June 24, 2016, ordering Venezuela to reimburse Tenaris and Talta for their costs. On September 21, 2016, Venezuela submitted a request for annulment of the award as well as the stay of enforcement of the award in accordance with the ICSID Convention and Arbitration Rules. The annulment request was registered on September 29, 2016, and an ad hoc committee to hear Venezuela's request was constituted on December 27, 2016. On March 24, 2017, the ad hoc committee rendered its decision to lift the stay of enforcement of the award. The ad hoc committee has not reserved its right to reopen that decision and no appeal against such decision is provided under ICSID's Arbitration Rules. The final hearing on Venezuela's annulment request is set for November 30 – December 1, 2017, and while there is no deadline within the ad hoc committee must render its decision, it is presently expected that the ad hoc committee will render a decision between March and June 2018.

Tenaris S.A. Consolidated Condensed Interim Financial Statements for the six-month period ended June 30, 2017

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Tavsa and Comsigua

Concerning the arbitration proceeding relating to the nationalization of Tenaris's shareholdings in Tavsa and Comsigua, on December 12, 2016, the tribunal issued its award upholding Tenaris's and Talta's claim that Venezuela had expropriated their investments in Tavsa and Comsigua in violation of the bilateral investment treaties entered into by Venezuela with the Belgium-Luxembourg Economic Union and Portugal. The award granted compensation in the amount of $137 million and ordered Venezuela to reimburse Tenaris and Talta $3.3 million in legal fees and ICSID administrative costs. In addition, Venezuela was ordered to pay interest from April 30, 2008 until the day of effective payment at a rate equivalent to LIBOR + 4% per annum, which as of December 31, 2016 amounted to $76 million. On April 11, 2017, Venezuela submitted a request for annulment of the award as well as the stay of enforcement of the award in accordance with the ICSID Convention and Arbitration Rules. Venezuela's annulment request was registered on April 14, 2017. The ad hoc committee that will hear Venezuela's request is yet to be constituted. There is no procedural deadline by which ICSID must constitute the ad hoc committee or issue a decision.

 

 Edgardo Carlos

Chief Financial Officer

Tenaris S.A. Half-year report 2017-Interim management report

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Exhibit – Alternative performance measures

EBITDA, Earnings before interest, tax, depreciation and amortization.

EBITDA provides an analysis of the operating results excluding depreciation and amortization and impairments, as they are non-cash variables which can vary substantially from company to company depending on accounting policies and the accounting value of the assets. EBITDA is an approximation to pre-tax operating cash flow and reflects cash generation before working capital variation. EBITDA is widely used by investors when evaluating businesses (multiples valuation), as well as by rating agencies and creditors to evaluate the level of debt, comparing EBITDA with net debt.

EBITDA is calculated in the following manner:

EBITDA = Operating results + Depreciation and amortization + Impairment charges/(reversals).