Company: TNRSF
Filing Date: 2025-04-07
Form Type: 6-K
Source: 0001171843-25-002038
Chunk: 9

Company: TENARIS SA
Filing Date: 2025-04-07
Form: 6-K
Chunk 9
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 “”), as to the exercise of the voting rights in respect of
the Company’s shares underlying such holder’s ADRs. Only those ADR holders of record as of the ADR Holders’ Record Date
will be entitled to provide the Depositary with voting instructions.

Proxy materials will be available to ADR holders as of the date of this
notice on the Company’s website at ir.tenaris.com/corporate-governance/annual-general-meeting. Voting instructions and voting cards
will be sent to ADR holders by the Depositary. Eligible ADR holders who wish to give voting instructions in respect of the shares underlying
ADRs must follow the instructions and meet the deadlines set forth in such voting instructions and voting cards.

In accordance with the Luxembourg law of 11 January 2008 on transparency obligations for issuers of securities, as amended, each shareholder of the Company must notify the Company and the Luxembourg Commission de Surveillance du Secteur Financier(CSSF) on an ongoing basis whenever the proportion of the Company’s voting rights held or controlled by such shareholder (or shareholders acting in concert) reaches, exceeds or falls below any of the following thresholds: 5%, 10%, 15%, 20%, 25%, 33 1/3%, 50% and 66 2/3%. Any such notification shall be made as indicated in the Company’s website at tenaris.com/en/sustainability/governance-and-ethics/and in accordance with CSSF regulations. Failure to make such notification will cause the suspension of the exercise of voting rights relating to the shares exceeding the proportion that should have been notified.

On 4 April 2025, the Company had a total issued share capital
of US$ 1,162,757,528, represented by 1,162,757,528 shares, each share carrying one vote.

Cecilia Bilesio

Secretary of the Board of Directors

4 April 2025

Luxembourg

Tenaris S.A.

Société Anonyme

26, Boulevard Royal, 4th Floor

L-2449 Luxembourg

RCS Luxembourg B 85 203

Dear Tenaris Shareholder and ADR Holder,

I am pleased to invite you to attend the Annual General
Meeting of Shareholders and an Extraordinary General Meeting of Shareholders of Tenaris S.A. (the “”), both
to be held on Tuesday 6th May 2025, at the Company’s registered office located at