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 May 4, 2006



                                  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__X__    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__X__


     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' Consolidated Condensed
Interim Financial Statements as of March 31, 2006.




                                    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: May 4, 2006



                                  Tenaris, S.A.



By: /s/ Cecilia Bilesio
-----------------------
Cecilia Bilesio
Corporate Secretary


                                       2




                                  TENARIS S.A.



                    CONSOLIDATED CONDENSED INTERIM FINANCIAL
                                   STATEMENTS


                                 MARCH 31, 2006




46a, Avenue John F. Kennedy - 2nd Floor.
L - 1855 Luxembourg

                                       3



Tenaris S.A.  Consolidated Condensed Interim Financial Statements for the
three-month period ended March 31, 2006
--------------------------------------------------------------------------------

CONSOLIDATED CONDENSED INTERIM INCOME STATEMENT

(all amounts in thousands of U.S. dollars, unless      Three-month period ended
 otherwise stated)                                            March 31,
                                                     ---------------------------
                                             Notes       2006           2005
                                                     ---------------------------
                                                             (Unaudited)
Net sales                                      2       1,783,152      1,452,927
Cost of sales                                  3        (972,492)      (865,128)
                                                     ---------------------------
Gross profit                                             810,660        587,799
Selling, general and administrative expenses   4        (217,884)      (185,083)
Other operating income (expenses), net                     8,130          2,967
                                                     ---------------------------
Operating income                                         600,906        405,683
Financial income (expense), net                5          10,596        (41,807)
                                                     ---------------------------
Income before equity in earnings of
 associated companies and income tax                     611,502        363,876
Equity in earnings of associated companies                21,521         30,163
                                                     ---------------------------
Income before income tax                                 633,023        394,039
Income tax                                              (191,333)      (114,069)
                                                     ---------------------------
Income for the period                                    441,690        279,970
                                                     ===========================

Attributable to:
Equity holders of the Company                            419,688        264,234
Minority interest                                         22,002         15,736
                                                     ---------------------------
                                                         441,690        279,970
                                                     ===========================


Earnings per share attributable to the equity
 holders of the Company during the period
Weighted average number of ordinary shares in
 issue (thousands)                                     1,180,537      1,180,537
Earnings per share (U.S. dollars per share)                 0.36           0.22
Earnings per ADS (U.S. dollars per ADS)                     0.71           0.45


The ratio of ordinary shares per American Depositary Shares (ADSs) was changed
from a ratio of one ADS equal to ten ordinary shares to a new ratio of one ADS
equal to two ordinary shares. The implementation date for this change was April
26, 2006, for shareholders of record at April 17, 2006. Earnings per ADS
reflected above are adjusted for this change in the conversion ratio.


The accompanying notes are an integral part of these consolidated condensed
interim financial statements. The Report of the Independent Registered Public
Accounting Firm on these consolidated condensed interim financial statements is
issued as a separate document. These consolidated condensed interim financial
statements should be read in conjunction with our audited Consolidated Financial
Statements and notes for the fiscal year ended December 31, 2005.

                                       1



Tenaris S.A.  Consolidated Condensed Interim Financial Statements for the
three-month period ended March 31, 2006
--------------------------------------------------------------------------------
CONSOLIDATED CONDENSED INTERIM BALANCE SHEET
(all amounts in thousands of U.S. dollars)
                                  At March 31, 2006       At December 31, 2005
                              ------------------------  ------------------------
                        Notes        (Unaudited)
ASSETS
Non-current assets
 Property, plant and
  equipment, net          6    2,275,130                 2,230,038
 Intangible assets, net   6      159,747                   159,099
 Investments in
  associated companies           341,446                   257,234
 Other investments                25,579                    25,647
 Deferred tax assets             212,087                   194,874
 Receivables                      32,276    3,046,265       65,852    2,932,744
                              -----------               -----------

Current assets
 Inventories                   1,491,632                 1,376,113
 Receivables and
  prepayments                    155,661                   143,282
 Current tax assets              121,138                   102,455
 Trade receivables             1,289,780                 1,324,171
 Other investments               297,557                   119,907
 Cash and cash
  equivalents                    910,991    4,266,759      707,356    3,773,284
                              ------------------------  ------------------------

Total assets                                7,313,024                 6,706,028
                                           ===========               ===========

EQUITY
Capital and reserves
 attributable to the
 Company's equity holders
 Share capital                 1,180,537                 1,180,537
 Legal reserves                  118,054                   118,054
 Share premium                   609,733                   609,733
 Currency translation
  adjustments                    (54,818)                  (59,743)
 Other reserves                   30,801                     2,718
 Retained earnings             2,076,191    3,960,498    1,656,503    3,507,802
                              -----------               -----------

Minority interest                             295,470                   268,071
                                           -----------               -----------
Total equity                                4,255,968                 3,775,873
                                           -----------               -----------

LIABILITIES
Non-current liabilities
 Borrowings                      639,129                   678,112
 Deferred tax liabilities        359,371                   353,395
 Other liabilities               157,492                   154,378
 Provisions                       45,074                    43,964
 Trade payables                      707    1,201,773        1,205    1,231,054
                              -----------               -----------

Current liabilities
 Borrowings                      329,703                   332,180
 Current tax liabilities         517,216                   452,534
 Other liabilities               159,190                   138,875
 Provisions                       36,566                    36,945
 Customer advances               129,291                   113,243
 Trade payables                  683,317    1,855,283      625,324    1,699,101
                              ------------------------  ------------------------

Total liabilities                           3,057,056                 2,930,155
                                           -----------               -----------

Total equity and
 liabilities                                7,313,024                 6,706,028
                                           ===========               ===========

Contingencies, commitments and restrictions to the distribution of profits are
disclosed in Note 7.

The accompanying notes are an integral part of these consolidated condensed
interim financial statements. The Report of the Independent Registered Public
Accounting Firm on these consolidated condensed interim financial statements is
issued as a separate document. These consolidated condensed interim financial
statements should be read in conjunction with our audited Consolidated Financial
Statements and notes for the fiscal year ended December 31, 2005.

                                       2




                                                                                              
Tenaris S.A.  Consolidated Condensed Interim Financial Statements for the
three-month period ended March 31, 2006
--------------------------------------------------------------------------------

CONSOLIDATED CONDENSED INTERIM STATEMENT OF CHANGES IN EQUITY
(all amounts in thousands of U.S. dollars)
                                               -------------------------------------------------------------------------------------
                                                          Attributable to equity holders of the Company
                                               ---------------------------------------------------------------
                                                                                          Currency   Retained
                                                  Share      Legal     Share    Other   translation  Earnings  Minority
                                                 Capital   Reserves   Premium  Reserves  adjustment    (*)     Interest     Total
                                               ----------- --------- --------- -------- ----------- ---------- --------- -----------
                                                                                                                         (Unaudited)
Balance at January 1, 2006                      1,180,537   118,054   609,733    2,718     (59,743) 1,656,503   268,071   3,775,873
                                               -------------------------------------------------------------------------------------
Currency translation differences                        -         -         -        -       4,925               13,699      18,624
Change in equity reserves (see Notes 1 and 8)                                   28,083                                       28,083
Acquisition of minority interest                        -         -         -                                      (721)       (721)
Dividends paid in cash                                  -         -         -                                    (7,581)     (7,581)
Income for the period                                   -         -         -        -                419,688    22,002     441,690
                                               -------------------------------------------------------------------------------------
Balance at March 31, 2006                       1,180,537   118,054   609,733   30,801     (54,818) 2,076,191   295,470   4,255,968
                                               =====================================================================================

                                            ----------------------------------------------------------------------------------------
                                                          Attributable to equity holders of the Company
                                            -------------------------------------------------------------------
                                                                               Other      Currency
                                               Share     Legal     Share   Distributable translation  Retained  Minority
                                              Capital   Reserves  Premium     Reserve    adjustments  Earnings  Interest    Total
                                            ----------- --------- -------- ------------- ------------ --------- -------- -----------
                                                                                                                         (Unaudited)
Balance at January 1, 2005                   1,180,537   118,054  609,733            82      (30,020)  617,538   165,271  2,661,195
Effect of adopting IFRS 3 (see Note 1)               -         -        -             -            -   110,775         -    110,775
                                            ----------------------------------------------------------------------------------------
Adjusted balance at January 1, 2005          1,180,537   118,054  609,733            82      (30,020)  728,313   165,271  2,771,970
Currency translation differences                     -         -        -             -      (41,106)        -    (2,586)   (43,692)
Acquisition of minority interest                     -         -        -             -            -         -       (38)       (38)
Income for the period                                -         -        -             -            -   264,234    15,736    279,970
                                            ----------------------------------------------------------------------------------------
Balance at March 31, 2005                    1,180,537   118,054  609,733            82      (71,126)  992,547   178,383  3,008,210
                                            ========================================================================================



(*) Retained Earnings calculated according to Luxembourg Law are disclosed in
Note 7 (ii).

The accompanying notes are an integral part of these consolidated condensed
interim financial statements. The Report of the Independent Registered Public
Accounting Firm on these consolidated condensed interim financial statements is
issued as a separate document. These consolidated condensed interim financial
statements should be read in conjunction with our audited Consolidated Financial
Statements and notes for the fiscal year ended December 31, 2005.

                                       3



Tenaris S.A.  Consolidated Condensed Interim Financial Statements for the
three-month period ended March 31, 2006
--------------------------------------------------------------------------------

CONSOLIDATED CONDENSED INTERIM CASH FLOW STATEMENT

                                                             Three-month period
                                                               ended March 31,
                                                            --------------------
(all amounts in thousands of U.S. dollars)                    2006       2005
                                                            --------------------
                                                                 (Unaudited)

Cash flows from operating activities
Income for the period                                        441,690    279,970
Adjustments for:
  Depreciation and amortization                               54,675     51,977
  Income tax accruals less payments                           83,458     37,478
  Equity in earnings of associated companies                 (21,521)   (30,163)
  Interest accruals less payments, net                         5,292      2,344
  Income from disposal of Investment                          (6,933)         -
Changes in provisions                                            731     (4,285)
Proceeds from Fintecna arbitration award net of BHP
 settlement                                                        -     66,594
Changes in working capital                                   (24,257)  (209,878)
Other, including currency translation adjustment              10,947    (11,344)
                                                            --------------------
Net cash provided by operating activities                    544,082    182,693
                                                            ====================

Cash flows from investing activities
Capital expenditures                                         (69,529)   (47,316)
Acquisitions of subsidiaries (see Note 8)                    (29,809)       (38)
Proceeds from disposal of property, plant and equipment and
 intangible assets                                             1,820      1,442
Dividends and distributions received from associated
 companies                                                         -     19,520
Changes in restricted bank deposits                              648    (27,680)
Reimbursement from trust funds                                     -    119,666
Investments in short terms securities                       (177,650)         -
                                                            --------------------
Net cash (used in) provided by investing activities         (274,520)    65,594
                                                            ====================

Cash flows from financing activities
Dividends paid to minority interest in subsidiaries           (7,581)         -
Proceeds from borrowings                                     101,085    398,269
Repayments of borrowings                                    (146,447)  (516,422)
                                                            --------------------
Net cash (used in) provided by financing activities          (52,943)  (118,153)
                                                            ====================
Increase in cash and cash equivalents                        216,619    130,134

Movement  in cash and cash equivalents
At beginning of the period                                   672,437    293,824
Effect of exchange rate changes                               (1,834)      (298)
Increase in cash and cash equivalents                        216,619    130,134
                                                            --------------------
At March 31,                                                 887,222    423,660
                                                            ====================

Cash and cash equivalents                                       At March 31,
                                                            --------------------
                                                              2006       2005
                                                            --------------------
Cash and bank deposits                                       910,991    477,106
Bank overdrafts                                              (22,369)   (12,266)
Restricted bank deposits                                      (1,400)   (41,180)
                                                            --------------------
                                                             887,222    423,660
                                                            ====================


The accompanying notes are an integral part of these consolidated condensed
interim financial statements. The Report of the Independent Registered Public
Accounting Firm on these consolidated condensed interim financial statements is
issued as a separate document. These consolidated condensed interim financial
statements should be read in conjunction with our audited Consolidated Financial
Statements and notes for the fiscal year ended December 31, 2005.

                                       4



Tenaris S.A.  Consolidated Condensed Interim Financial Statements for the
three-month period ended March 31, 2006
--------------------------------------------------------------------------------

NOTES TO THE CONSOLIDATED CONDENSED INTERIM FINANCIAL STATEMENTS


     Index to the notes to the consolidated condensed interim financial
statements

     1    General information and basis of presentation

     2    Segment information

     3    Cost of sales

     4    Selling, general and administrative expenses

     5    Financial income (expenses), net

     6    Property, plant and equipment and intangible assets, net

     7    Contingencies, commitments and restrictions to the distribution of
          profits

     8    Business acquisitions, incorporation of subsidiaries and other
          significant events

     9    Related party disclosures


                                       5



Tenaris S.A.  Consolidated Condensed Interim Financial Statements for the
three-month period ended March 31, 2006
--------------------------------------------------------------------------------

NOTES TO THE CONSOLIDATED CONDENSED INTERIM FINANCIAL STATEMENTS
(In the notes all amounts are shown in U.S. dollars, unless otherwise stated)

1    General information and basis of presentation

Tenaris S.A. (the "Company" or  "Tenaris"),  a Luxembourg  corporation  (societe
anonyme holding), was incorporated on December 17, 2001 as a holding company for
investments in steel pipe manufacturing and distribution companies.  The Company
consolidates  its  subsidiary  companies,  as detailed in Note 31 to the audited
Consolidated  Financial  Statements  for the year ended  December 31, 2005,  and
modified  as  discussed  in  Note  8 to  these  consolidated  condensed  interim
financial statements.

These consolidated  condensed interim financial statements have been prepared in
accordance with IAS 34, "Interim Financial  Reporting".  The accounting policies
used in the  preparation  of  these  consolidated  condensed  interim  financial
statements are consistent with those used in the audited consolidated  financial
statements for the year ended December 31, 2005.  These  consolidated  condensed
interim  financial  statements  should be read in  conjunction  with the audited
Consolidated  Financial  Statements for the year ended December 31, 2005,  which
have  been  prepared  in  accordance  with  International   Financial  Reporting
Standards ("IFRS").

The  preparation  of  consolidated  condensed  interim  financial  statements in
conformity with IFRS requires  management to make certain  accounting  estimates
and assumptions that might affect the reported amounts of assets and liabilities
and the disclosure of contingent  assets and liabilities as of the balance sheet
dates,  and also the reported  amounts of revenues and expenses for the reported
periods. Actual results may differ from these estimates.

Material  intercompany  transactions and balances  between Tenaris  subsidiaries
have been eliminated in consolidation.  However, some financial gains and losses
do arise from intercompany  transactions  because certain subsidiaries use their
respective  local  currencies  as  their  functional   currency  for  accounting
purposes.  Such  gains  and  losses  are  included  in the  consolidated  income
statement under Financial income (expense), net.

The Company applies hedge accounting  treatment for certain qualifying financial
instruments.  These  transactions  are  classified  as cash flow hedges  (mainly
currency forward contracts on highly probable forecast transactions and interest
rate swaps).  The effective  portion of the fair value of  derivatives  that are
designated and qualify as cash flow hedges is recognized in equity.  The gain or
loss relating to the ineffective  portion is recognized in the income statement.
The fair  value of the  Company's  derivative  financial  instruments  (asset or
liability) is reflected on the Balance Sheet.

For  transactions  designated and qualifying for hedge  accounting,  the Company
documents at the time of designation of the transaction the relationship between
hedging instruments and hedged items, as well as its risk management objectives.
The Company also  documents  its  assessment  at hedge  designation  and at each
period end whether the  derivatives  that are used in hedging  transactions  are
expected to be effective in offsetting changes in cash flows of hedged items. At
March 31, 2006, the effective  portion of designated cash flow hedges amounts to
$0.4 million and is included in Other reserves in equity.

Upon the adoption of IFRS 3, which was adopted together with the revised IAS 38,
"Intangible Assets", and IAS 36, "Impairment of Assets",  previously accumulated
negative  goodwill is  required  to be  derecognized  through an  adjustment  to
retained  earnings.  The  derecognition  of  negative  goodwill  in this  manner
resulted  in an  increase  of $110.8  million  in the  beginning  balance of the
Company's equity at January 1, 2005.

These  consolidated  condensed  interim  financial  statements were approved for
issue by the Tenaris Board of Directors on May 2, 2006.

                                       6



Tenaris S.A.  Consolidated Condensed Interim Financial Statements for the
three-month period ended March 31, 2006
--------------------------------------------------------------------------------

2    Segment information

     Primary reporting format: business segments


                               (all amounts in thousands of U.S. dollars)
                           -----------------------------------------------------
                                       Welded &
                                         Other
                                       Metallic
                             Seamless  Products   Energy     Other      Total
                           -----------------------------------------------------
Three-month period ended                        (Unaudited)
March 31, 2006
Net sales                   1,440,969   114,596   161,622    65,965   1,783,152
Cost of sales                (693,879)  (75,525) (156,491)  (46,597)   (972,492)
                           -----------------------------------------------------
Gross profit                  747,090    39,071     5,131    19,368     810,660

Depreciation and
 amortization                  46,831     4,547       433     2,864      54,675

Three-month period ended
March 31, 2005
Net sales                   1,105,252   160,434   143,972    43,269   1,452,927
Cost of sales                (601,517) (101,631) (137,484)  (24,496)   (865,128)
                           -----------------------------------------------------
Gross profit                  503,735    58,803     6,488    18,773     587,799

Depreciation and
 amortization                  44,363     3,622       799     3,193      51,977


   Secondary reporting format: geographical segments

                                 (all amounts in thousands of U.S. dollars)
                        --------------------------------------------------------
                                                    Middle    Far
                          South             North   East &   East &
                         America  Europe   America  Africa   Oceania    Total
                        --------------------------------------------------------
Three-month period                              (Unaudited)
ended March 31, 2006
Net sales                343,374  467,813  467,599  331,070  173,296  1,783,152
Depreciation and
 amortization             22,510   15,049   15,422      209    1,485     54,675

Three-month period
ended March 31, 2005
Net sales                354,590  405,743  414,058  146,623  131,913  1,452,927
Depreciation and
 amortization             21,083   17,781   11,477       11    1,625     51,977

Allocation of net sales to geographical segments is based on customer location.
Allocation of depreciation and amortization is based on the geographical
location of the underlying assets.

                                       7



Tenaris S.A.  Consolidated Condensed Interim Financial Statements for the
three-month period ended March 31, 2006
--------------------------------------------------------------------------------

3    Cost of sales

                                                        Three-month period ended
                                                                March 31,
                                                        ------------------------
     (all amounts in thousands of U.S. dollars)            2006         2005
                                                        ------------------------
                                                               (Unaudited)
     Inventories at the beginning of the period          1,376,113    1,269,470

     Plus: Charges of the period
           Raw materials, energy, consumables and other    807,014      706,519
     Services and fees                                      84,348       73,495
     Labor cost                                            108,987       99,060
     Depreciation of property, plant and equipment          47,740       44,812
     Amortization of intangible assets                       1,130        1,711
     Maintenance expenses                                   25,080       23,048
     Provisions for contingencies                                -        1,200
     Allowance for obsolescence                              4,946        1,264
     Taxes                                                   1,013          975
     Other                                                   7,753        4,282
                                                        ------------------------
                                                         1,088,011      956,366

     Less: Inventories at the end of the period         (1,491,632)  (1,360,708)
                                                        ------------------------
                                                           972,492      865,128
                                                        ========================

4    Selling, general and administrative expenses

                                                        Three-month period ended
                                                                March 31,
                                                        ------------------------
     (all amounts in thousands of U.S. dollars)            2006         2005
                                                        ------------------------
                                                               (Unaudited)
     Services and fees                                      25,438       31,487
     Labor cost                                             58,650       46,035
     Depreciation of property, plant and equipment           1,896        2,479
     Amortization of intangible assets                       3,909        2,975
     Commissions, freight and other selling expenses        87,593       68,024
     Provisions for contingencies                              211        1,878
     Allowances for doubtful accounts                        1,901        5,314
     Taxes                                                  21,350       16,822
     Other                                                  16,936       10,069
                                                        ------------------------
                                                           217,884      185,083
                                                        ========================

5    Financial income (expense), net

                                                        Three-month period ended
                                                                March 31,
                                                        ------------------------
     (all amounts in thousands of U.S. dollars)            2006         2005
                                                        ------------------------
                                                               (Unaudited)
     Interest expense                                      (11,883)     (12,442)
     Interest income                                        12,481        2,959
     Net foreign exchange transaction losses and changes
     in fair value of derivative instruments                 8,805      (33,879)
     Other                                                   1,193        1,555
                                                        ------------------------
                                                            10,596      (41,807)
                                                        ========================

                                       8



Tenaris S.A.  Consolidated Condensed Interim Financial Statements for the
three-month period ended March 31, 2006
--------------------------------------------------------------------------------

6    Property, plant and equipment and intangible assets, net

                                                            Net
                                                         Property,       Net
                                                         Plant and    Intangible
                                                         Equipment      Assets
                                                        -----------  -----------
     (all amounts in thousands of U.S. dollars)         (Unaudited)  (Unaudited)
     Three-month period ended March 31, 2006

     Opening net book amount                             2,230,038      159,099
     Currency translation differences                       20,393          524
     Transfers                                                (124)         124
     Additions                                              65,653        3,876
     Disposals                                             (14,086)
     Increase due to business acquisition                   22,892        1,163
     Depreciation/ Amortization charge                     (49,636)      (5,039)
                                                        -----------  -----------
     At March 31, 2006                                   2,275,130      159,747
                                                        ===========  ===========

7    Contingencies, commitments and restrictions to the distribution of profits

This note should be read in conjunction with Note 26 included in the Company's
audited Consolidated Financial Statements for the year ended December 31, 2005.
Significant changes or events since the date of the annual report are the
following:

(i)  Commitments

     (a) In August 2001, Dalmine Energie S.p.A. ("Dalmine Energie") entered into
     a ten-year  contract  ending  October  1, 2011 with Eni S.p.A.  Gas & Power
     Division  ("Eni") for the purchase of natural gas with certain  take-or-pay
     conditions.  The outstanding  value of these  commitments at March 31, 2006
     amounts to approximately EUR 770.2 million ($932.3 million).

     (b) Under the Gas Release Program  enacted by Eni, in August 2004,  Dalmine
     Energie  increased its supply of natural gas for the period from October 1,
     2004 to September 30, 2008.  The gas purchase and sale  agreements  entered
     into with Eni contain customary take-or-pay conditions.  The additional gas
     supply mentioned above is valued at approximately EUR 247.5 million ($299.6
     million),  based on prices  prevailing at March 2006.  Dalmine  Energie has
     also obtained the necessary capacity on the interconnection  infrastructure
     at the Italian  border to transport the natural gas to Italy for the supply
     period.

     (c) Dalmine  Energie has entered  into  arrangements  and expects to obtain
     additional gas transportation capacity on the Trans Austria Gasleitung GmbH
     ("TAG") pipeline, which is presently under construction. This capacity will
     allow Dalmine Energie to import an incremental 1,176.5 million cubic meters
     of natural gas per year. The additional  transportation  capacity, which is
     subject to "ship or pay"  provisions,  will be available on a firm basis on
     the TAG pipeline beginning October 2008 and through September 2028.

     The expected annual value of this "ship or pay" commitment is approximately
     EUR 5.0 million per year. Tenaris provided bank guarantees in the amount of
     EUR 15.1  million  in support  of  Dalmine  Energie.  The value of the bank
     guarantees  corresponds to the termination  penalties that would be due TAG
     in the  event  of  termination  or  non-utilization  of the  transportation
     capacity.

                                       9



Tenaris S.A.  Consolidated Condensed Interim Financial Statements for the
three-month period ended March 31, 2006
--------------------------------------------------------------------------------

7    Contingencies, commitments and restrictions to the distribution of profits
     (Cont'd)

(ii) Restrictions to the distribution of profits and payment of dividends

As of March 31, 2006, shareholders' equity as defined under Luxembourg law and
regulations consisted of the following:

                     (all amounts in thousands of U.S. dollars)
  Share capital                                                       1,180,537
  Legal reserve                                                         118,054
  Share premium                                                         609,733
  Retained earnings including net income for the three month period
  ended March 31, 2006                                                1,173,773
                                                                     -----------

  Total shareholders equity according to Luxembourg law               3,082,097
                                                                     ===========

At  least  5% of the net  income  per  year as  calculated  in  accordance  with
Luxembourg  law and  regulations  must be  allocated  to the creation of a legal
reserve  equivalent to 10% of share capital.  As of March 31, 2006, this reserve
is fully  allocated and  additional  allocations to the reserve are not required
under Luxembourg law. Dividends may not be paid from this reserve.

Tenaris may pay  dividends to the extent,  among other  conditions,  that it has
distributable retained earnings calculated in accordance with Luxembourg law and
regulations.

At March 31,  2006,  the  retained  earnings  of Tenaris  under  Luxembourg  law
totalled $1,173.8 million, as detailed below.

                     (all amounts in thousands of U.S. dollars)

  Retained earnings at December 31, 2005 under Luxembourg law         1,171,738
  Other income and expenses for the three-month period ended March
  31, 2006                                                                2,035
                                                                     -----------

  Retained earnings at March 31, 2006 under Luxembourg law            1,173,773
                                                                     ===========

8    Business acquisitions, incorporation of subsidiaries and other significant
     events

(a)  Investment in Ternium S.A. ("Ternium")

     On September 9, 2005,  the Company  exchanged its 21.2% equity  interest in
     Consorcio  Siderurgia  Amazonia  Ltd.  ("Amazonia")  and its  24.4%  equity
     interest  in  Ylopa  Servicos  de  Consultadoria   Ltda.   ("Ylopa"),   for
     209,460,856  shares in Ternium,  the company into which San Faustin N.V. (a
     Netherlands  Antilles  corporation  and  the  controlling   shareholder  of
     Tenaris)  consolidated  its Latin American  holdings in flat and long steel
     producers Siderar S.A.I.C. ("Siderar"),  Sidor C.A. ("Sidor") and Hylsamex,
     S.A de C.V.  As a result of the  exchange,  which was  carried out based on
     fair values as determined by an internationally  recognized investment bank
     engaged for this purpose, Tenaris obtained an initial ownership interest of
     approximately 17.9% in Ternium.

     Subsequently, on October 27, 2005, Usinas Siderurgicas de Minas Gerais S.A.
     reached an agreement  with  Ternium to exchange its  interests in Amazonia,
     Ylopa and Siderar,  plus additional  consideration of approximately  $114.1
     million provided as a convertible loan, for an equity stake in Ternium.  As
     a  consequence  of the  additional  shares  issued under this  transaction,
     Tenaris'  ownership  stake was  reduced to 15.0% of  Ternium's  outstanding
     common stock at December 31, 2005. The effect of this transaction  resulted
     in an increase of the Company's  proportional ownership in Ternium's equity
     of approximately  $2.7 million,  which Tenaris recognized in Other Reserves
     in equity.

                                       10



Tenaris S.A.  Consolidated Condensed Interim Financial Statements for the
three-month period ended March 31, 2006
--------------------------------------------------------------------------------

8    Business acquisitions,  incorporation of subsidiaries and other significant
     events (Cont'd)

     In addition,  in August 2005 Tenaris  extended to Ternium two  subordinated
     convertible  loans  consisting of principal  amount of $39.7  million.  The
     principal  amount  of these  loans at the date  issue  corresponded  to the
     amount of certain  distributions  received from Amazonia  during the second
     and third quarters of 2005 in connection  with Ternium's  participation  in
     Amazonia's  financial debt  restructuring in 2003. At the date of Ternium's
     initial public  offering  ("IPO"),  the loans totaled  approximately  $40.5
     million, including accrued interest.

     On February  1, 2006,  Ternium  completed  its IPO,  issuing an  additional
     248,447,200  shares  (equivalent to 24,844,720 ADS) at a price of $2.00 per
     share, or $20.00 per ADS. Tenaris received an additional  20,252,338 shares
     upon the mandatory  conversion of its loans to Ternium.  In addition to the
     shares  issued to  Tenaris,  Ternium  issued  shares to other  shareholders
     corresponding to their mandatory  convertible  loans. On February 23, 2006,
     the underwriters of Ternium's IPO exercised an  overallotment  option under
     which  Ternium  issued an  additional  37,267,  080 shares  (equivalent  to
     3,726,708  ADS). As a result of the IPO and the conversion of loans,  as of
     February 1, 2006,  Tenaris'  ownership stake in Ternium amounted to 11.46%.
     The effect of these transactions  resulted in an additional increase of the
     Company's proportional ownership in Ternium's equity of approximately $27.7
     million, which Tenaris recognized in Other Reserves in equity.

     At March 31, 2006, the closing price of Ternium shares as quoted on the New
     York Stock Exchange was $28.35 per ADS, giving  Tenaris'  ownership stake a
     market value of approximately $651 million. At March 31, 2006, the carrying
     value of  Tenaris's  ownership  stake in Ternium was  approximately  $338.0
     million.

(b)  Acquisition of Welded Pipe Business in Argentina

     On January 31,  2006,  Siat S.A., a subsidiary  of Tenaris,  completed  its
     acquisition  of the  welded  pipe  assets and  facilities  located in Villa
     Constitucion,  province  of Santa Fe,  Argentina,  belonging  to  Industria
     Argentina de Acero, S.A. ("Acindar") for $29.1 million. The acquisition was
     approved  by the  Argentine  antitrust  authorities  (Comision  Nacional de
     Defensa de la Competencia). The facilities acquired have an annual capacity
     of  80,000  tons  of  welded  pipes  whose  small  diameter  range  largely
     complements the range of welded pipes that Tenaris produces in Argentina.

     The  acquired  business  did not  materially  contribute  to the  Company's
     revenue and income. The fair value of acquired assets and liabilities were:

                                                             Three-month period
                                                            ended March 31, 2006
                                                            --------------------
     (all amounts in thousands of U.S. dollars)                  Unaudited)
                                                            --------------------
     Other assets and liabilities (net)                                   5,033
     Property, plant and equipment                                       22,892
     Goodwill                                                             1,163
                                                            --------------------
     Net assets acquired                                                 29,088

(c)  Minority Interest

     During the quarter ended march 31, 2006,  additional shares of Silcotub and
     Dalmine were acquired from minority  shareholders  for  approximately  $0.7
     million.


                                       11



Tenaris S.A.  Consolidated Condensed Interim Financial Statements for the
three-month period ended March 31, 2006
--------------------------------------------------------------------------------

9    Related party disclosures

The  Company  is  controlled  by  San  Faustin  N.V.,  a  Netherlands   Antilles
corporation,  which owns  60.45% of the  Company's  outstanding  shares,  either
directly or through its wholly-owned  subsidiary I.I.I.  Industrial  Investments
Inc., a Cayman  Islands  corporation.  The  Company's  directors  and  executive
officers  as a group own 0.2% of the  Company's  outstanding  shares,  while the
remaining 39.35% is publicly  traded.  San Faustin N.V. is controlled by Rocca &
Partners, a British Virgin Islands corporation.

Transactions  and balances  disclosed as with  "Associated"  companies are those
with  companies in which  Tenaris  owns 20% to 50% of the voting  rights or over
which Tenaris exerts significant influence, but does not have control. All other
transactions  with related  parties which are not  Associated  and which are not
consolidated are disclosed as "Other".

The following transactions were carried out with related parties:

                         (all amounts in thousands of $)

     Three-month period ended March 31, 2006

                                                     Associated  Other   Total
                                                        (1)
(i)  Transactions
     (a) Sales of goods and services
           Sales of goods                              24,902   14,391   39,293
           Sales of services                            3,544      631    4,175
                                                     ---------------------------
                                                       28,446   15,022   43,468
                                                     ===========================

     (b) Purchases of goods and services
           Purchases of goods                          19,441    5,510   24,951
           Purchases of services                        2,116   13,141   15,257
                                                     ---------------------------
                                                       21,557   18,651   40,208
                                                     ===========================


     Three-month period ended March 31, 2005
                                                     Associated  Other   Total
                                                        (2)
(i)  Transactions
    (a)  Sales of goods and services
           Sales of goods                                 181   40,686   40,867
           Sales of services                              235    2,854    3,089
                                                     ---------------------------
                                                          416   43,540   43,956
                                                     ===========================

     (b) Purchases of goods and services
           Purchases of goods                              27   17,649   17,676
           Purchases of services                           40   16,239   16,279
                                                     ---------------------------
                                                           67   33,888   33,955
                                                     ===========================

                                       12



Tenaris S.A.  Consolidated Condensed Interim Financial Statements for the
three-month period ended March 31, 2006
--------------------------------------------------------------------------------

9    Related party disclosures (Cont'd)


     At March 31, 2006
                                                     Associated  Other   Total
                                                     ---------------------------
(ii) Period-end balances

     (a) Related to sales/purchases of
     goods/services
           Receivables from related parties            24,982   22,954   47,936
           Payables to related parties                (23,072)  (9,599) (32,671)
                                                     ---------------------------
                                                        1,910   13,355   15,265
                                                     ===========================

     (b) Other balances
           Receivables                                  2,080        -    2,080

     (c)  Financial debt
           Borrowings (4)                             (55,623)       -  (55,623)

     At December 31, 2005
                                                     Associated  Other   Total
                                                     ---------------------------

(ii) Period-end balances

     (a) Related to sales/purchases of
     goods/services
           Receivables from related parties            30,988   15,228   46,216
           Payables to related parties                (21,034)  (8,413) (29,447)
                                                      --------------------------
                                                        9,954    6,815   16,769
                                                      ==========================

    (b)  Other balances (3)                            42,437        -   42,437

    (c)  Financial debt
           Borrowings (4)                             (54,801)       -  (54,801)

(1)  Includes Ternium S.A. and its subsidiaries and Condusid C.A.

(2)  Up to September 30, 2005 includes: Condusid, Ylopa, Amazonia and Sidor.
     From October 1, 2005 includes: Condusid and Ternium

(3)  Includes convertible loan to Ternium S.A. of $40.4 million at December 31,
     2005.

(4)  Convertible loan from Sidor C.A. to Matesi (Materiales Siderurgicos S.A.).


(iii) Officers and director's compensation

The aggregate compensation of the directors and executive officers earned during
the three-month period ended March 31, 2006 amounted to $3.2 million.



                                                          Carlos Condorelli
                                                         Chief Financial Officer

                                       13