LUXEMBOURG -- (Marketwire) -- 03/30/12 -- Tenaris S.A. (NYSE: TS) (BAE: TS) (BVM: TS) (MILAN: TEN), filed today with its securities regulators its annual report for the year ended December 31, 2011 . Tenaris also published the convening notice to the Annual General Meeting of Shareholders that will

LUXEMBOURG -- (MARKET WIRE) -- 03/22/12 -- Tenaris S.A. (NYSE: TS) (BAE: TS) (BVM: TS) (MILAN: TEN) announced today that, following receipt of all requisite approvals from CVM ( Brazil's securities regulator) and the Sao Paulo stock exchange , its wholly-owned subsidiary Tenaris Investments S.à

The Financial and Operational Information Contained in This Press Release Is Based on Audited Consolidated Financial Statements Presented in U.S. Dollars and Prepared in Accordance With International Financial Reporting Standards as Issued by the International Accounting Standard Board and Adopted by the European Union, or IFRS

LUXEMBOURG -- (MARKET WIRE) -- 01/18/12 -- Tenaris S.A. (NYSE: TS) (BAE: TS) (BVM: TS) (MILAN: TEN) announced today that, following receipt of a proposal by minority shareholders representing 32.6% of the shares held by the public in its controlled Brazilian subsidiary Confab Industrial S.A.

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

LUXEMBOURG -- (MARKET WIRE) -- 11/27/11 -- Tenaris S.A. (NYSE: TS) (BAE: TS) (MXSE: TS) (MILAN: TEN) announced today that its Brazilian subsidiary, Confab Industrial S.A. (Confab), has agreed to acquire 25 million ordinary shares of Usinas Siderúrgicas de Minas Gerais S.A .

The financial information contained in this press release is based on unaudited consolidated condensed interim financial statements presented in U.S. dollars (US$) and prepared in accordance with International Financial Reporting Standards as issued by the International Accounting Standard Board and adopted by the European Union, or IFRS.

LUXEMBOURG -- (MARKET WIRE) -- 11/01/11 -- Tenaris S.A. (NYSE: TS) (BAE: TS) (MXSE: TS) (MILAN: TEN) announced today the withdrawal of its request for approval of a public delisting tender offer to acquire all of the ordinary and preferred shares held by the public in its controlled Brazilian

LUXEMBOURG -- (MARKET WIRE) -- 08/29/11 -- Tenaris S.A. (NYSE: TS) (BAE: TS) (MXSE: TS) (MILAN: TEN) announced today that it filed a request with CVM ( Brazil's securities regulator) and the Sao Paulo stock exchange seeking their approval to a public delisting tender offer to acquire all of the