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
This Report on Form 6-K shall be incorporated by reference in our automatic shelf Registration Statement on Form F-3
as amended (File No. 333-171751), to the extent not superseded by documents or reports subsequently filed by us
under the Securities Act of 1933 or the Securities Exchange Act of 1934, in each case as amended
As of February 16, 2011
TENARIS, S.A.
(Translation of Registrant's name into English)
TENARIS, S.A.
46a, Avenue John F. Kennedy
L-1855 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's press release announcing that it has been informed by its controlling shareholder that there has been a reorganization in the chain of ownership of the Company.
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 16, 2011
Tenaris, S.A.
By: /s/ Cecilia Bilesio
Cecilia Bilesio
Corporate Secretary