Leadership

Mr. Rocca is the chairman of the Company’s board of directors. He is a grandson of Agostino Rocca. He is also the chairman of the board of directors of Ternium and a director and president of San Faustin. He is a member of the executive committee of the World Steel Association. Mr. Rocca is an Italian citizen.

Mr. Ayat is an independent member of the Company’s board of directors and of its audit committee. He served as Schlumberger’s executive vice president and chief financial officer from 2007 until early 2020 and as senior strategic advisor to the chief executive officer of Schlumberger until January 2022. Mr. Ayat has held several financial and operational positions in Schlumberger, where he commenced his career in 1982. He was based in Paris, Houston and Dallas, as well as in the Middle East and Far East regions, serving as group treasurer, controller, geomarket manager for Indonesia and drilling regional vice president for Asia Pacific. Mr. Ayat is also a member of the board of directors and audit committee of Liberty Energy, a leading provider of hydraulic fracturing and wireline services to E&P companies in North America. He is a French and Lebanese citizen.

Mr. Bonatti is a member of the Company’s board of directors. He is a grandson of Agostino Rocca, founder of the Techint Group, a group of companies controlled by San Faustin. Throughout his career in the Techint Group he has been involved specifically in the engineering and construction and corporate sectors. He was first employed by the Techint Group in 1976, as deputy resident engineer in Venezuela. In 1984, he became a director of San Faustin, and from 2001 until 2020 he has served as its president. He is also a member of the board of directors of Ternium. Mr. Bonatti is an Italian citizen.

Mr. Curá is a member of the Company’s board of directors. He served as president of our operations in North America until May 2, 2018, a position held since 2006. He was first employed by Siderca in 1988. Previously, he served as Siderca’s exports director, Tamsa’s exports director and commercial director, sales and marketing manager of our Middle East subsidiary, president of Algoma Tubes, president and chief executive officer of Maverick Tubulars and president and chief executive officer of Hydril Company, director of our Oilfield Services global business unit and Tenaris commercial director. He was also a member of the board of directors of the American Petroleum Institute (“API”) and of the American Iron and Steel Institute (“AISI”). He is a marine engineer from the Instituto Tecnológico de Buenos Aires and holds an MBA from the Massachusetts Institute of Technology. Mr. Curá is an U.S. citizen.

Ms. Móndolo is a member of the Company’s board of directors and vice chair responsible for overseeing the Company's Sustainability Strategy, Risk Management and Compliance, since 5^th August 2026. She is also a member of the board of directors of Ternium S.A. and vice chair of the board. She served as Tenaris’s Chief Financial Officer from August 2019 until May 2025. She joined the Techint Group in 1984 and has more than 40 years of experience in accounting, reporting, audit and finance. She served also, as Chief Audit Executive of Tenaris from 2010 to 2016 and as financial officer in several companies in the Techint Group between 2016 and 2019. Ms Móndolo is a public accountant from the Universidad Nacional de La Plata and got an MBA from the IAE Business School. Mrs. Móndolo is an Argentine and Italian citizen.

Ms. Montgomery is an independent member of the Company’s board of directors. She has 20 years of experience advising senior executives and government officials on geopolitical and policy issues. She currently serves as a Public Policy Director at Meta Platforms, Inc. In her 15-year career in the U.S. government, her roles included serving in the White House as Special Advisor to the Vice President for Europe and Eurasia and as the Deputy Assistant Secretary of State for the EU and Western Europe. Ms. Montgomery was previously a senior vice president at Albright Stonebridge Group, where she advised Fortune 500 clients on geopolitical risk, regulatory issues, and market entry and exit. She currently serves as a member of the board of directors of the Center for European Policy Analysis and the Leadership Council for Women in National Security. She holds a BA in History and Political Science from Stanford University, an MPA in International Relations from Princeton University, and a life membership in the Council on Foreign Relations. Ms. Montgomery is an U.S. citizen.

Ms. Novales-Flamarique is an independent member of the Company’s board of directors and also a member of its Audit Committee since 5^th August 2026. She advises multinational institutions on a variety of strategic and transformational issues. Previously, she was country head for Generation Mexico, an NGO founded by McKinsey & Company that transforms education-to-employment systems to prepare, place, and support people into life-changing careers that would otherwise be inaccessible. She was also a partner at McKinsey & Company, leading more than 50 teams advising companies in Mexico, other Latin American countries, the United States and Europe. She began her career in asset management at Letko, Brosseau & Associates in Montreal, Canada, and worked as an investment banker at Citigroup Global Markets in New York City. She currently serves as an independent director at Scotiabank Mexico, where she is a member of the Audit and Talent committees. She also sits on advisory boards at several fintech, HRtech, insurtech start-ups and venture capital funds and is an independent senior advisor. She holds an MBA from London Business School, a BA from HEC Montreal and is a CFA Charterholder. Ms. Novales-Flamarique is a Canadian, Spanish, and U.S. citizen.

Mr. Rocca is a member of the Company’s board of directors. He is a grandson of Agostino Rocca. He is chairman of the board of directors of San Faustin, member of the board of directors of Ternium and president of the board of directors of Humanitas S.p.A. and Tenova S.p.A. (“Tenova”). Furthermore, in Italy he is president of the Giorgio Cini Foundation and member of the board of Bocconi University. At international level, he is member of the European and Global Advisory Board of Harvard Business School, member of the European Round Table of Industrialists, vice president of Aspen Institute and member of the board of Brembo N.V. Mr. Rocca is an Italian citizen.

Ms. Tiuba is an independent member of the Company’s board of directors and chairperson of its audit committee. She is a Brazilian qualified lawyer and accountant with more than 20 years of professional experience in Brazil and Luxembourg. She started her career at Barbosa, Mussnich & Aragão law firm in Rio de Janeiro, Brazil, where she practiced corporate law, M&A and tax litigation. She worked in EY and PwC, in the Brazil and Luxembourg offices, advising multinational clients, private equity houses and family offices. She gained banking experience working as international senior wealth planner at Banque Edmond de Rothschild, in Luxembourg. She currently serves as member of the board of directors of Investing for Development SICAV, a Luxembourg social impact fund and of its Forest and Climate Change Fund. She holds a Master of Laws in International and Comparative Law at the Vrije Universiteit Brussel, a specialization in EU tax law from Leiden University and a Master of Laws in international taxation from Vienna University of Economics. Ms. Tiuba is a Brazilian and Luxembourgish citizen.

Mr. Vogel is a member of the Company’s board of directors and also holds the position of vice chairman of the board. He is a notable Mexican businessperson with an extensive career in various industries. He graduated from the Universidad Nacional Autónoma de México and also holds an MBA from the University of Texas at Austin. Mr. Vogel has held prominent positions in several companies, showcasing his expertise and leadership skills. He is the chairman of GCollado S.A.B. de C.V. His influence extends to multiple organizations, as he has served as president of Canacero, the Steel Chamber in Mexico, and as vice chairman of the American Iron and Steel Institute. Moreover, Mr. Vogel is actively involved in various other companies and institutions. He is a board member of Techint, S.A. de C.V., Alpek S.A.B. de C.V., Banco Santander (México) S.A., Innovare R&D, S.A., Europea Network Business Solutions S.A. de C.V., Club de Industriales, A.C., Consejo Coordinador Empresarial, and several other organizations. His roles also include contributions to the academic sector, as he is a member of the board of the Universidad Panamericana and IPADE, A.C. His international presence is marked by his membership in The Trilateral Commission and the International Board of The Manhattan School of Music. He also plays a key role in the US-Mexico CEO Dialogue as its chairman. Vogel's career reflects a blend of leadership in business and contributions to international relations and education. Mr. Vogel is a Mexican citizen.