Tenaris S.A.

Foreign Filer Report • Feb 6, 2013

6-K 1 tenaris6k.htm TENARIS, S.A. 6-K tenaris6k.htm Licensed to: mw@12009 Document Created using EDGARizerAgent 5.4.1.0 Copyright 1995 - 2009 Thomson Reuters. All rights reserved.

FORM 6 - K

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Report of Foreign Private Issuer

Pursuant to Rule 13a - 16 or 15d - 16 of

the Securities Exchange Act of 1934

As of February 6, 2013

TENARIS, S.A.

(Translation of Registrant's name into English)

TENARIS, S.A.

29 avenue de la Porte-Neuve

3rd Floor

L-2227 Luxembourg

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or 40-F.

Form 20-F ü Form 40-F___

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12G3-2(b) under the Securities Exchange Act of 1934.

Yes No ü

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-__.

The attached material is being furnished to the Securities and Exchange Commission pursuant to Rule 13a-16 and Form 6-K under the Securities Exchange Act of 1934, as amended. This report contains Tenaris' press release announcing that a Tenaris subsidiary was named in CSN lawsuit seeking tender offer to minority holders of Usiminas ordinary shares.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: February 6, 2013

Tenaris, S.A.

By: /s/ Cecilia Bilesio

Cecilia Bilesio

Corporate Secretary

Giovanni Sardagna

Tenaris

1-888-300-5432

www.tenaris.com

Tenaris subsidiary named in CSN lawsuit seeking tender offer to minority holders of Usiminas ordinary shares

Luxembourg, February 4, 2013 – Tenaris S.A. (NYSE, Buenos Aires and Mexico: TS and MTA Italy: TEN) (Tenaris) announced that its Brazilian subsidiary Confab Industrial S.A. (Confab) was notified of a lawsuit filed in Brazil by Companhia Siderúrgica Nacional (CSN) and various entities affiliated with CSN against Confab and various subsidiaries of Ternium S.A. The entities named in the CSN lawsuit had acquired a participation in Usinas Siderúrgicas de Minas Gerais S.A. – USIMINAS (Usiminas) in January 2012.

The CSN lawsuit alleges that, under applicable Brazilian laws and rules, the acquirers were required to launch a tag-along tender offer to all minority holders of Usiminas ordinary shares for a price per share equal to 80% of the price per share paid in such acquisition, or 28.8 Brazilian reais (BRL), and seeks an order to compel the acquirers to launch an offer at that price plus interest. If so ordered, the offer would need to be made to 182,609,851 ordinary shares of Usiminas not belonging to Usiminas’ control group, and Confab would have a 17.9% share in the offer.

Tenaris believes that CSN’s allegations are groundless and without merit, as confirmed by several opinions of Brazilian counsel and previous decisions by Brazil’s securities regulator Comissão de Valores Mobiliários , including a February 2012 decision determining that the above mentioned acquisition did not trigger any tender offer requirement. Accordingly, Tenaris will defend itself vigorously.

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