LUXEMBOURG, Sept. 30, 2025 (GLOBE NEWSWIRE) -- Tenaris S.A. (NYSE and Mexico: TS and EXM Italy: TEN) (“Tenaris”) announced today the completion of the first USD600 million tranche of its USD1.2 billion Share Buyback Program announced on June 6, 2025 (the “Program”). During this first tranche, which ran from June 9, 2025, to (and including) September 30, 2025, the Company purchased a total of 33,059,955 ordinary shares, representing 3.08% of its total issued share capital, for a total consideration of €516, ...