Share buyback program of up to usd 1.2 billion

Luxembourg, may 27, 2025 (globe newswire) -- tenaris s.a. (nyse and mexico: ts and exm italy: ten) (“tenaris”) announced today that tenaris's board of directors approved a share buyback program of up to $1.2 billion (which, at the closing price of may 27, 2025 on the milan stock exchange would represent approximately 74 million shares, or 6.9% of tenaris's outstanding shares), to be executed within a year, with the intention to cancel the ordinary shares acquired through the program.
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