Company: TNRSF
Filing Date: 2025-12-17
Form Type: SCHEDULE 13D/A
Source: 0001213900-25-122779
Chunk: 0

Company: TENARIS SA
Filing Date: 2025-12-17
Form: SCHEDULE 13D/A
Chunk 0
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 SAN FAUSTIN     
   Name/Title:  /s/ Fernando J. Mantilla / Attorney-in-fact                            
   Date:        12/17/2025                                                             |

| SAN FAUSTIN S.A. |

| Signature:   SAN FAUSTIN S.A.                                
   Name/Title:  /s/ Fernando J. Mantilla / Attorney-in-fact   
   Date:        12/17/2025                                    |

| TECHINT HOLDINGS S.A R.L. |

| Signature:   TECHINT HOLDINGS S.A R.L.                       
   Name/Title:  /s/ Fernando J. Mantilla / Attorney-in-fact   
   Date:        12/17/2025                                    |

| Comments accompanying signature:Pursuant to Rule 13d-1(k)(1), the undersigned joins in the filing of this Amendment No. 13 on his own behalf and on behalf of SAN FAUSTIN S.A. and TECHINT HOLDINGS S.A R.L.                     
 Pursuant to Rule 13d-1(k)(1), the undersigned joins in the filing of this Amendment No. 13 on his own behalf and on behalf of ROCCA & PARTNERS STICHTING ADMINISTRATIEKANTOOR AANDELEN SAN FAUSTIN and TECHINT HOLDINGS S.A R.L. 
 Pursuant to Rule 13d-1(k)(1), the undersigned joins in the filing of this Amendment No. 13 on his own behalf and on behalf of ROCCA & PARTNERS STICHTING ADMINISTRATIEKANTOOR AANDELEN SAN FAUSTIN and SAN FAUSTIN S.A.          |