LUXEMBOURG -- (MARKET WIRE) -- 01/17/12 -- Tenaris S.A. (NYSE: TS) (BAE: TS) (BVM: TS) (MILAN: TEN) announced today that its Brazilian subsidiary, Confab Industrial S.A. (Confab), completed its previously announced acquisition of 25 million ordinary shares of Usinas Siderúrgicas de Minas Gerais S.A. (Usiminas).

Tenaris is a leading global supplier of steel tubes and related services for the world's energy industry and certain other industrial applications.

Giovanni Sardagna

Tenaris

1-888-300-5432

www.tenaris.com

Source: Tenaris S.A.

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