Repurchased own ordinary shares reached 5% of Tenaris's voting rights; Tenaris's controlling shareholder files amendment to Schedule 13D

Core Viewpoint - Tenaris S.A. has announced significant developments regarding its share buyback program and the actions of its controlling shareholders, indicating ongoing strategic management of its equity structure [1][2]. Share Buyback Program - As of December 17, 2025, Tenaris has repurchased ordinary shares amounting to 5.07% of its voting rights, which will be held in treasury and subsequently cancelled [1]. - The share buyback transactions are reported in compliance with Market Abuse Regulation [1]. Shareholder Actions - On December 17, 2025, San Faustin S.A. and Techint Holdings S.à r.l. filed an amendment to their beneficial ownership report, indicating that Techint Holdings sold 2,600,000 Tenaris ordinary shares between December 9 and December 12, 2025 [2]. - Techint Holdings has entered into a non-discretionary accelerated share disposal agreement to sell up to 21,000,000 ordinary shares of Tenaris from December 15, 2025, to May 19, 2026 [2]. - The sales under the accelerated share disposal program will be conducted independently by a European financial institution, ensuring compliance with applicable regulations [2]. Future Amendments - The Reporting Persons may amend their beneficial ownership report as required, and such amendments will be publicly accessible through the SEC's EDGAR database [3][4].