Tenaris S.A.

Transaction in Own Shares • Jul 19, 2025

Informazione Regolamentata n. 0602-25-2025		Data/Ora Inizio Diffusione 19 Luglio 2025 00:32:46	Euronext Milan
Societa'	:	TENARIS
Identificativo Informazione Regolamentata	:	208171
Utenza - referente		TENARISN02 - Sardagna Giovanni
Tipologia	:	2.4
Data/Ora Ricezione	:	19 Luglio 2025 00:32:46
Data/Ora Inizio Diffusione		19 Luglio 2025 00:32:46
Oggetto	:	Weekly Report (July 14, 2025 – July 18, 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 (July 14, 2025 – July 18, 2025) on the First Tranche of Tenaris Share Buyback Program.

Luxembourg, July 18, 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 July 14, 2025 to (and including) July 18, 2025:

Date	Trading Venue	Shares Purchased	Weighted Average Price (EUR)	Purchases in EUR	Reference F X	Purchases in USD
14-jul-25	MTAA	200,000	16.3917	3,278,340	1.1683	3,830,085
14-jul-25	CEUX	100,000	16.3948	1,639,480	1.1683	1,915,404
15-jul-25	MTAA	436,522	16.1530	7,051,140	1.1619	8,192,719
15-jul-25	CEUX	89,826	16.1247	1,448,417	1.1619	1,682,916
16-jul-25	MTAA	504,510	16.0537	8,099,252	1.1595	9,390,678
16-jul-25	CEUX	320,000	16.0615	5,139,680	1.1595	5,959,202
16-jul-25	TQEX	40,133	16.0853	645,551	1.1595	748,485
16-jul-25	AQEU	38,319	16.0636	615,541	1.1595	713,689
17-jul-25	MTAA	265,285	16.0090	4,246,948	1.1589	4,921,788
17-jul-25	CEUX	174,492	16.0120	2,793,966	1.1589	3,237,927
17-jul-25	TQEX	52,000	16.0137	832,712	1.1589	965,030
17-jul-25	AQEU	15,494	16.0213	248,234	1.1589	287,678
18-jul-25	MTAA	350,000	15.9315	5,576,025	1.1647	6,494,118
18-jul-25	CEUX	250,000	15.9317	3,982,925	1.1647	4,638,714
		2,836,581	16.0751	45,598,212		52,978,433

From July 14, 2025 to (and including) July 18, 2025, the Company has purchased a total of 2,836,581 ordinary shares for a total consideration of €45,598,212, equivalent to USD52,978,433.

As of July 18, 2025, the Company held in treasury 20,058,339 ordinary shares equal to 1.87% 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.