Exhibit 8.1
Tenaris – List of subsidiaries of Tenaris S.A.
Significant operating subsidiaries
We conduct all our operations through subsidiaries. The following table shows the significant operating subsidiaries of the Company and its direct and indirect ownership in each subsidiary as of December 31, 2013, 2012 and 2011.
Percentage Ownership | ||||||||||||||||
Company | Country of | Main Activity | 2013 | 2012 | 2011 | |||||||||||
Algoma Tubes Inc. | Canada | Manufacture of seamless steel pipes | 100 | % | 100 | % | 100 | % | ||||||||
Confab Industrial S.A. | Brazil | Manufacture of welded steel pipes and capital goods | 100 | % | 100 | % | 41 | % | ||||||||
Dalmine S.p.A. | Italy | Manufacture of seamless steel pipes | 99 | % | 99 | % | 99 | % | ||||||||
Exiros B.V. | Netherlands | Procurement of raw materials and other products or services | 50 | % | 50 | % | 50 | % | ||||||||
Hydril Company | U.S.A. | Manufacture and marketing of premium connections | 100 | % | 100 | % | 100 | % | ||||||||
Maverick Tube Corporation | U.S.A. | Manufacture of welded steel pipes | 100 | % | 100 | % | 100 | % | ||||||||
Metalmecánica S.A. | Argentina | Manufacture of sucker rods | 100 | % | 100 | % | 100 | % | ||||||||
NKKTubes K.K. | Japan | Manufacture of seamless steel pipes | 51 | % | 51 | % | 51 | % | ||||||||
PT Seamless Pipe Indonesia Jaya | Indonesia | Manufacture of seamless steel pipes | 77 | % | 77 | % | 77 | % | ||||||||
Prudential Steel ULC | Canada | Manufacture of welded steel pipes | 100 | % | 100 | % | 100 | % | ||||||||
S.C. Silcotub S.A. | Romania | Manufacture of seamless steel pipes | 100 | % | 100 | % | 100 | % | ||||||||
Siat S.A. | Argentina | Manufacture of welded steel pipes | 100 | % | 100 | % | 82 | % | ||||||||
Siderca S.A.I.C. | Argentina | Manufacture of seamless steel pipes | 100 | % | 100 | % | 100 | % | ||||||||
Tenaris Coiled Tubes LLC (and predecessors) | U.S.A. | Manufacture of coiled tubing | 100 | % | 100 | % | 100 | % | ||||||||
Tenaris Connection Limited | St. Vincent & Grenadines | Ownership and licensing of technology | 100 | % | 100 | % | 100 | % | ||||||||
Tenaris Financial Services S.A. | Uruguay | Financial services | 100 | % | 100 | % | 100 | % | ||||||||
Tenaris Global Services S.A. | Uruguay | Holding company and marketing of steel pipes | 100 | % | 100 | % | 100 | % | ||||||||
Tenaris Investments S.àr.l Luxembourg, Zug Branch | Switzerland | Holding company and financial services | 100 | % | 100 | % | 100 | % | ||||||||
Tubos de Acero de México S.A. | Mexico | Manufacture of seamless steel pipes | 100 | % | 100 | % | 100 | % | ||||||||
Tubos del Caribe Ltda. | Colombia | Manufacture of welded steel pipes | 100 | % | 100 | % | 100 | % |