EX-8.1 10 ex81_3.htm EXHIBIT 8.1

Exhibit 8.1

Tenaris – List of subsidiaries of Tenaris S.A.

Principal subsidiaries

We conduct all our operations through subsidiaries. The following table shows the principal subsidiaries of the Company and its direct and indirect ownership in each subsidiary as of December 31, 2021, 2020 and 2019.

Company

Country of Incorporation

Main activity

Percentage of ownership at December 31, (*)

2021

2020

2019

ALGOMA TUBES INC.

Canada

Manufacturing of seamless steel pipes

100%

100%

100%

CONFAB INDUSTRIAL S.A. and subsidiaries

Brazil

Manufacturing of welded steel pipes and capital goods

100%

100%

100%

DALMINE S.p.A.

Italy

Manufacturing of seamless steel pipes

100%

100%

100%

HYDRIL COMPANY and subsidiaries (except detailed) (a)

USA

Manufacture and marketing of premium connections

100%

100%

100%

IPSCO TUBULARS INC. and subsidiaries

USA

Manufacturing of welded and seamless steel pipes

100%

100%

NA

MAVERICK TUBE CORPORATION and subsidiaries

USA

Manufacturing of welded steel pipes

100%

100%

100%

NKKTUBES (b)

Japan

Manufacturing of seamless steel pipes

51%

51%

51%

P.T. SEAMLESS PIPE INDONESIA JAYA

Indonesia

Manufacturing of seamless steel products

89%

89%

89%

S.C. SILCOTUB S.A.

Romania

Manufacturing of seamless steel pipes

100%

100%

100%

SAUDI STEEL PIPE CO.

Saudi Arabia

Manufacturing of welded steel pipes

48%

48%

48%

SIAT SOCIEDAD ANONIMA

Argentina

Manufacturing of welded and seamless steel pipes

100%

100%

100%

SIDERCA SOCIEDAD ANONIMA INDUSTRIAL Y COMERCIAL and subsidiaries

Argentina

Manufacturing of seamless steel pipes

100%

100%

100%

TALTA - TRADING E MARKETING SOCIEDADE UNIPESSOAL LDA.

Portugal

Holding Company

100%

100%

100%

TENARIS BAY CITY, INC.

USA

Manufacturing of seamless steel pipes

100%

100%

100%

TENARIS CONNECTIONS BV

Netherlands

Development, management and licensing of intellectual property

100%

100%

100%

TENARIS FINANCIAL SERVICES S.A.

Uruguay

Financial company

100%

100%

100%

TENARIS GLOBAL SERVICES (CANADA) INC.

Canada

Marketing of steel products

100%

100%

100%

TENARIS GLOBAL SERVICES (U.S.A.) CORPORATION

USA

Marketing of steel products

100%

100%

100%

TENARIS GLOBAL SERVICES (UK) LTD

United Kingdom

Holding company and marketing of steel products

100%

100%

100%

TENARIS GLOBAL SERVICES S.A. and subsidiaries (except detailed) (c)

Uruguay

Holding company and marketing of steel products

100%

100%

100%

TENARIS INVESTMENTS (NL) B.V. and subsidiaries

Netherlands

Holding company

100%

100%

100%

TENARIS INVESTMENTS S.àr.l.

Luxembourg

Holding company

100%

100%

100%

TENARIS TUBOCARIBE LTDA.

Colombia

Manufacturing of welded and seamless steel pipes

100%

100%

100%

TUBOS DE ACERO DE MEXICO, S.A.

Mexico

Manufacturing of seamless steel pipes

100%

100%

100%

 

(*) All percentages rounded.

 

(a) Tenaris Investments S.àr.l. holds 100% of Hydril's subsidiaries shares except for Technical Drilling & Production Services Nigeria. Ltd where it held 80% for 2019.

(b) Tenaris and JFE agreed to terminate the NKKTubes's manufacturing operations by the end of June 2022.

(c) Tenaris holds 98.4% of Tenaris Supply Chain S.A. and 40% of Tubular Technical Services Ltd. and Pipe Coaters Nigeria Ltd., 49% of Amaja Tubular Services Limited, 49% of Tubular Services Angola Lda and 60% of Tenaris Baogang Baotou Steel Pipes Ltd.