Tenaris to Commence a USD 600 million First Tranche of its USD 1.2 Billion Share Buyback Program

Group 1 - Tenaris S.A. announced a Share Buyback Program covering up to USD 1.2 billion, with a non-discretionary buyback agreement with a primary financial institution [1][2] - The buyback program will be executed in compliance with applicable regulations, allowing purchases during closed periods [2] - The first tranche of the program will cover up to USD 600 million and will commence on June 9, 2025, ending no later than December 8, 2025 [3] Group 2 - Ordinary shares purchased under the program will be cancelled in due course, following the authority granted by the general meeting of shareholders held on May 6, 2025 [3] - Tenaris is recognized as a leading global supplier of steel tubes and related services for the energy industry and other industrial applications [5]