San Faustin S.A. Amends Tenaris S.A. Stake Filing

TL;DR

San Faustin S.A. updated its Tenaris S.A. ownership filing (13D/A).

AI Summary

On December 9, 2024, San Faustin S.A. filed an amendment (Amendment No. 9) to its Schedule 13D for Tenaris S.A. The filing indicates a change in beneficial ownership, with San Faustin S.A. continuing to hold a significant stake in Tenaris S.A. The filing does not specify a dollar amount for the change but details the reporting entity and the subject company.

Why It Matters

This filing provides updated information on the ownership structure of Tenaris S.A., which is crucial for investors to understand potential influences on the company's strategic decisions and stock performance.

Risk Assessment

Risk Level: low — The filing is an amendment to an existing Schedule 13D, indicating a change in reporting rather than a new or highly volatile event.

Key Players & Entities

• San Faustin S.A. (company) — Reporting entity filing the Schedule 13D/A
• Tenaris S.A. (company) — Subject company of the Schedule 13D/A filing
• Fernando J. Mantilla (person) — Contact person for the filing

FAQ

Key Financial Figures

• $1.00 — .A. (Name of Issuer) Ordinary Shares, $1.00 par value per share (Title of Class of
• $1 — ating to the Ordinary Shares, par value $1 per share of Tenaris S.A. (the “O

Filing Documents

• ea0224105-13da9san_tenaris.htm (SC 13D/A) — 62KB
• 0001213900-24-106992.txt ( ) — 64KB

Identity and Background

Item 2. Identity and Background This Schedule 13D is being jointly filed by each of the following persons pursuant to Rule 13d-1(k) (collectively, the “Reporting Persons”). (a) ROCCA & PARTNERS STICHTING ADMINISTRATIEKANTOOR AANDELEN SAN FAUSTIN (“RP STAK”) Fascinatio Boulevard 764, 2909 VA Capelle aan den IJssel, The Netherlands. RP STAK is a private foundation ( stichting ) organized under the laws of The Netherlands. No person or group of persons controls RP STAK. (b) SAN FAUSTIN S.A. (“SAN FAUSTIN”) 26, Boulevard Royal, Ground Floor, L-2449 Luxembourg. SAN FAUSTIN is a société anonyme (public limited liability company) organized under the laws of the Grand-Duchy of Luxembourg. RP STAK continues to control SAN FAUSTIN (i.e. it continues to have the ability to influence matters affecting, or submitted to a vote of the shareholders of SAN FAUSTIN, including the election of directors and the approval of certain corporate transactions and other matters concerning SAN FAUSTIN’s policies). (c) TECHINT HOLDINGS S.À R.L. (“TECHINT HOLDINGS”) 26, Boulevard Royal, Ground Floor, L-2449 Luxembourg. TECHINT HOLDINGS is a société à responsabilité limitée (private limited liability company) organized under the laws of the Grand-Duchy of Luxembourg. All of the shares of TECHINT HOLDINGS are held by SAN FAUSTIN. The name, residence or business address, present principal occupation or employment (and the name, principal business and address of any corporation or other organization in which such employment is conducted) and citizenship of each voting committee member, executive officer or director, as applicable, of each Reporting Person are set forth in Schedule I to the Amendment No. 6 to the Schedule 13D of Tenaris S.A., dated January 22, 2024, and incorporated into this Item 2 by reference. During the last five years, none of the Reporting Persons, nor,

Interest in Securities of the Issuer

Item 5. Interest in Securities of the Issuer (a) (b) RP STAK. See items (7) through (11) and (13) on page 2 SAN FAUSTIN. See items (7) through (11) and (13) on page 3 TECHINT HOLDINGS. See items (7) through (11) and (13) on page 4 (c) There have been no transactions in Ordinary Shares effected by the Reporting Persons or, to the best of the Reporting Person’s knowledge, any person or entity identified on Schedule I to the Amendment No. 6 to the Schedule 13D of Tenaris S.A., dated January 22, 2024, during the last 60 days. (d) Not applicable. (e) Not applicable.

Material to Be Filed as Exhibits

Item 7. Material to Be Filed as Exhibits Exhibit Description A Power of Attorney of ROCCA & PARTNERS STICHTING ADMINISTRATIEKANTOOR AANDELEN SAN FAUSTIN dated October 31 st , 2023.*** B Power of Attorney of SAN FAUSTIN S.A., dated September 28 th , 2023.*** C Power of Attorney of TECHINT HOLDINGS S.à r.l., dated September 28 th , 2023.*** *** Previously filed as an exhibit to the Schedule 13D of Tenaris S.A. dated November 2 nd , 2023 and incorporated by reference in this Amendment No. 9. Page 6 of 9 SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I, Fernando J. Mantilla, attorney duly authorized by ROCCA & PARTNERS STICHTING ADMINISTRATIEKANTOOR AANDELEN SAN FAUSTIN to sign this statement, certify that the information set forth in this statement is true, complete and correct. Pursuant to Rule 13d-1(k)(1), the undersigned joins in the filing of this Amendment No. 9 on his own behalf and on behalf of SAN FAUSTIN S.A. and TECHINT HOLDINGS S.À R.L. December 9, 2024 /s/ Fernando J. Mantilla Attorney-in-fact Page 7 of 9 SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I, Fernando J. Mantilla, attorney duly authorized by SAN FAUSTIN S.A. to sign this statement, certify that the information set forth in this statement is true, complete and correct. Pursuant to Rule 13d-1(k)(1), the undersigned joins in the filing of this Amendment No. 9 on his own behalf and on behalf of ROCCA & PARTNERS STICHTING ADMINISTRATIEKANTOOR AANDELEN SAN FAUSTIN and TECHINT HOLDINGS S.À R.L. December 9, 2024 /s/ Fernando J. Mantilla Attorney-in-fact Page 8 of 9 SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I, Fernando J. Mantilla, attorney duly authorized by TECHINT HOLDINGS S.À R.L. to sign this statement, certify that the information set forth in this statement is true, complete and correct. Pursuant to Rule 13d-1(k)(1), the unders

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