TENARIS SA

The Company is a soci t anonyme organized under the laws of the Grand Duchy of Luxembourg established on December 17, 2001. The Company’s registered office is located at 26 Boulevard Royal, 4 th Floor, L-2449, Luxembourg. Its agent for U.S. federal securities law purposes is Tenaris Global Services (U.S.A.) Corporation ("TEUS"), located at 2200 West Loop South, Suite 400, Houston, TX 77027. Tenaris Tenaris began in 1948 with the formation of Siderca, then Argentina’s sole producer of seamless steel pipe products, founded by San Faustin’s predecessor. We grew organically in Argentina and then, in the early 1990s, began to evolve beyond this initial base into a global business through a series of strategic acquisitions and investments. As of the date of this annual report, our investments include controlling interests in several manufacturing companies: Siat S.A. ("Siat"), an Argentine welded steel pipe manufacturer; Tamsa S.A. de C.V. ("Tamsa"), the sole Mexican producer of seamless steel pipe products; Dalmine S.p.A. ("Dalmine"), a leading Italian producer of seamless steel pipe products; Confab Industrial S.A. ("Confab"), the leading Brazilian producer of welded steel pipe products; Algoma Tubes Inc. ("AlgomaTubes"), a Canadian producer of seamless and welded steel pipe products; S.C. Silcotub S.A. ("Silcotub"), a leading Romanian producer of seamless steel pipe products; Maverick Tube Corporation ("Maverick"), a U.S. producer of seamless and welded steel pipe products; Tenaris TuboCaribe Ltda.