1. June 7, 2016 Company Overview

2. Tenaris 2 June 7, 2016 Global Industrial System Annual manufacturing capacity of six million tons of steel pipes -3.4 million tons of seamless pipes -2.7 million tons of welded pipes Manufacturing facilities in 15 countries R&D centers in four countries Service and distribution network in 33 countries 24,000 employees (Dec. 31, 2008) Annual net sales: US$12.0 billion (2008) Stock exchange listings: New York, Buenos Aires, Italy and Mexico 2008 Sales by Region Serving the world’s energy industry and other industrial applications

3. Company OverviewTenaris 3 June 7, 2016 Worldwide Operations

4. Company OverviewTenaris 4 June 7, 2016 A History of Industrial Enterprise 1930sAgostino Rocca, Techint’s founder, is Managing Director at Dalmine 1954Tamsa and Siderca begin operations 1980s Siderca expands capacity for export markets 1986Siderca acquires Siat, an Argentine welded pipe manufacturer 1993Siderca and Tamsa form strategic alliance 1996Dalmine joins the strategic alliance 1998-2000Further expansion through the incorporation of Tavsa, Confab, NKKTubes and AlgomaTubes 2001Launch of Tenaris brand 2002Tenaris becomes a listed company following exchange offer 2004Tenaris integrates Silcotub 2006Tenaris expands in USA, Canada and Colombia through Maverick Tube Corp. 2007 With Hydril, Tenaris expands its offer of products and services for the oil & gas industry 2009 Venezuela acquires control over TAVSA

5. Company OverviewTenaris 5 June 7, 2016 Integrated Industrial Management 4 electric steel shops 16 seamless rolling mills 32 welded tube mills 52 heat treatment lines (28 in hot rolling mills ) 78 premium threading lines One Quality Management System (ISO 9001:2000) One Health, Safety and Environment Management System (OHSA 18000 and ISO 14000)

6. Company OverviewTenaris 6 June 7, 2016 Focused on Four Market Segments Leading global manufacturer and supplier of tubular products and services used in: Pipeline Services Oilfield Services Process & Power Plant Services Industrial & Automotive Services Drilling, completion and production of oil and gas Transportation of oil and gas Process and power plants Specialized industrial and automotive applications

7. Company OverviewTenaris 7 June 7, 2016 Oilfield Services A full range of products and services for ever the most demanding E&P environments Deepwater Deep directional Sour gas Thermal Arctic Horizontal and extended reach Drilling with casing Connections available with Dopeless® technology TenarisHydril

8. Company OverviewTenaris 8 June 7, 2016 Oilfield Services Managing the supply chain from the mill to the well Technical design and product selection services Inventory and pipe management Just-in-time delivery to the rig Accessories management Field support services Consultancy and post-installation services

9. Company OverviewTenaris 9 June 7, 2016 Pipeline Services Steel Catenary Risers Top Tension Risers Flowlines Bends Upset SCR TDZ Buckle Arrestors Advanced line pipe technology for new drilling frontiers

10. Company OverviewTenaris 10 June 7, 2016 Process & Power Plant Services Close relationship with main HPI process plant contractors worldwide for the planning and sourcing of materials for major projects Extensive product range including large diameter pipes of up to 28’’ in special steel grades, able to withstand high pressure/high temperature and highly corrosive fluids Tenaris Secured Supply Service helps customers minimize total cost of ownership over life of the project Tailored offer for power gen, including high alloyed steel grades such as T/P92 and TEMPALOY AA-1 Strong presence in HRSG and boilers for coal-fired power plants

11. Company OverviewTenaris 11 June 7, 2016 Industrial & Automotive Services Focus on highly specialized products including hydraulic cylinders, gas cylinders, automotive components such as airbag inflator vessels, and general mechanical and engineering applications Tailor-made products offering longer product life, weight reduction, better mechanical properties and cost savings High added-value operations at customized components centers in Mexico and Romania Just-in-time deliveries, stocking and consignment programs to simplify the supply chain

12. Company OverviewTenaris 12 June 7, 2016 An Integrated R&D Network Four dedicated research centers specializing in: Argentina Steel making processes OCTG products Italy Rolling processes Mechanical and power generation products Japan Products with high chrome steel level Mexico Welding processes Linepipe products Full-scale testing and finite element analysis of new products More than 200 scientists and engineers staffing the research facilities and nearly half hold Master or Doctoral degrees Collaboration with selected external R&D laboratories, product testing centers and universities

13. Company OverviewTenaris 13 June 7, 2016 QHSE standards and objectives integrated into all management processes Principles of sustainable development integrated into all operations Employee health and safety, customer satisfaction and protection of environment are equal and absolute priorities QHSE policy encompasses suppliers and the entire supply chain IT tools and continuous training to enhance awareness of Quality and HSE issues Constant investment in plants, people and processes to improve QHSE performance Pursuing the Highest Standards in QHSE Values consider own personnel until 2006. For 2007, figure is showing own personnel plus contractors. Sector Approach worldsteel methodology.

14. Company OverviewTenaris 14 June 7, 2016 Investing in Human Resources Corporate university to align knowledge and oversee training 63 hours of training per salaried employee in 2008 Global Trainee Program: 2-year program for graduate-level entry International, culturally diverse team Working environment that rewards creativity and innovative problem solving skills Promotion based on employee’s performance, professional abilities, interpersonal skills and work commitment

15. Company OverviewTenaris 15 June 7, 2016 Community Development Investment in Community programs US$14 million (Budget FY 2008-2009) Conviction that industry contributes to lasting and equitable economic growth Working together with local authorities and non-governmental organizations to promote and obtain support for the company’s industrial values within the local communities Programs include Roberto Rocca Education Program, employee home ownership in Argentina, district heating in Italy, social inclusion in Mexico and Toni El Suizo’s global bridge building activities

16. Company OverviewTenaris 16 June 7, 2016 Integrity and Transparency Code of Conduct applicable to all employees Guiding principles of integrity and transparency for relations between employees, suppliers, customers and third parties Transparency lines open for employees, suppliers, customers and shareholders Rigorous international standards for corporate governance, financial reporting and information disclosure

17. Company OverviewTenaris 17 June 7, 2016