Share buyback program of up to USD 1.2 billion

Group 1 - Tenaris S.A. announced a share buyback program of up to $1.2 billion, representing approximately 74 million shares or 6.9% of its outstanding shares [1] - The buyback program is driven by significant cash flow generation and a strong balance sheet, with a maximum limit of 10% of the company's shares [2] - The program is expected to launch in June 2025 and will be executed through a primary financial institution [2] Group 2 - The buybacks may be paused or ceased at any time, subject to compliance with applicable laws and regulations [3] - Updates on the buyback program will be provided via press releases and on the Investors section of Tenaris's corporate website [3] - The buybacks will be conducted in compliance with the Market Abuse Regulation and other relevant regulations [3] Group 3 - Tenaris is a leading global supplier of steel tubes and related services for the energy industry and other industrial applications [5]