Tenaris S.A.

Transaction in Own Shares • Jul 5, 2025

Informazione Regolamentata n. 0602-23-2025	Data/Ora Inizio Diffusione 5 Luglio 2025 02:05:33		Euronext Milan
	:
Societa'		TENARIS
Identificativo Informazione Regolamentata	:	207752
Utenza - referente		TENARISN02 - Sardagna Giovanni
Tipologia	:	2.4
Data/Ora Ricezione	:	5 Luglio 2025 02:05:33
Data/Ora Inizio Diffusione	:	5 Luglio 2025 02:05:33
Oggetto	:	Weekly Report (June 30, 2025 – July 4, 2025) on the First Tranche of Tenaris Share Buyback Program.
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Giovanni Sardagna Tenaris 1-888-300-5432 www.tenaris.com

Weekly Report (June 30, 2025 – July 4, 2025) on the First Tranche of Tenaris Share Buyback Program.

Luxembourg, July 4, 2025. - Tenaris S.A. (NYSE and Mexico: TS and EXM Italy: TEN) ("Tenaris") announced today that pursuant to its First Tranche of the USD1.2 billion Share Buyback Program announced on June 6, 2025, covering up to USD 600 million to be executed in the open market, it has repurchased the following ordinary shares from June 30, 2025 to (and including) July 4, 2025:

Date	Trading Venue	Shares Purchased	Weighted Average Price (EUR)	Purchases in EUR	Reference F X	Purchases in USD
30-Jun-25	MTAA	400,000	16.0024	6,400,960	1.1734	7,510,886
30-Jun-25	CEUX	250,000	16.0018	4,000,450	1.1734	4,694,128
30-Jun-25	TQEX	50,000	15.9985	799,925	1.1734	938,632
30-Jun-25	AQEU	49,895	15.9972	798,180	1.1734	936,585
1-Jul-25	MTAA	307,132	15.7199	4,828,084	1.1780	5,687,483
1-Jul-25	CEUX	173,964	15.7376	2,737,776	1.1780	3,225,100
2-Jul-25	MTAA	250,000	16.1559	4,038,975	1.1766	4,752,258
2-Jul-25	CEUX	49,558	16.1255	799,148	1.1766	940,277
3-Jul-25	MTAA	100,000	16.3079	1,630,790	1.1755	1,916,994
4-Jul-25	MTAA	71,956	16.2091	1,166,342	1.1777	1,373,601
		1,702,505	15.9768	27,200,630		31,975,944

From June 30, 2025 to (and including) July 4, 2025, the Company has purchased a total of 1,702,505 ordinary shares for a total consideration of €27,200,630, equivalent to USD31,975,944.

As of July 4, 2025, the Company held in treasury 15,396,773 ordinary shares equal to 1.44% 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.

Numero di Pagine: 4