Tenaris S.A.

Transaction in Own Shares • Nov 15, 2025

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Informazione Regolamentata n. 0602-42-2025

Data/Ora Inizio Diffusione 15 Novembre 2025 09:06:24 Euronext Milan

Societa' : TENARIS

Identificativo Informazione

Regolamentata

: 212027

Utenza - referente : TENARISN02 - Sardagna Giovanni

Tipologia : 2.4

Data/Ora Ricezione : 15 Novembre 2025 09:06:24

Data/Ora Inizio Diffusione : 15 Novembre 2025 09:06:24

Oggetto : Weekly Report (November 10, 2025 –

November 14, 2025) on the Second Tranche of

Tenaris Share Buyback Program.

Testo del comunicato

Vedi allegato

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Giovanni Sardagna Tenaris 1-888-300-5432 www.tenaris.com

Weekly Report (November 10, 2025 – November 14, 2025) on the Second Tranche of Tenaris Share Buyback Program.

Luxembourg, November 14, 2025. - Tenaris S.A. (NYSE and Mexico: TS and EXM Italy: TEN) ("Tenaris") announced today that pursuant to its Second Tranche of the USD1.2 billion Share Buyback Program announced on November 2, 2025, covering up to USD600 million to be executed in the open market, it has repurchased the following ordinary shares from November 10, 2025 to (and including) November 14, 2025:

Date	Trading Venue	Shares Purchased	Weighted Average Price (EUR)	Purchases in EUR	Reference FX	Purchases in USD
13-nov-25	MTA	5,445	17.7482	96,639	1.1595	112,053
		5,445	17.7482	96,639		112,053

From November 10, 2025 to (and including) November 14, 2025, the Company has purchased a total of 5,445 ordinary shares for a total consideration of €96,639, equivalent to USD112,053.

As of November 14, 2025, the Company held in treasury 33,065,400 ordinary shares equal to 3.08% of the total issued share capital.

Tenaris intends to cancel treasury shares purchased under the Programs in due course.

Details of the above transactions, are available on Tenaris's corporate website under the Share Buyback Program Section https://ir.tenaris.com/share-buyback-program.

Some of the statements contained in this press release are "forward-looking statements". Forward-looking statements are based on management's current views and assumptions and involve known and unknown risks that could cause actual results, performance or events to differ materially from those expressed or implied by those statements. These risks include but are not limited to risks arising from uncertainties as to future oil and gas prices and their impact on investment programs by oil and gas companies.

Tenaris is a leading global supplier of steel tubes and related services for the world's energy industry and certain other industrial applications.

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Fine Comunicato n.0602-42-2025 Numero di Pagine: 3