Tenaris S.A.

Transaction in Own Shares • Aug 8, 2025

Informazione Regolamentata n. 0602-29-2025		Data/Ora Inizio Diffusione 8 Agosto 2025 20:32:22	Euronext Milan
	:
Societa'		TENARIS
Identificativo Informazione Regolamentata	:	209176
Utenza - referente		TENARISN02 - Sardagna Giovanni
Tipologia	:	2.4
Data/Ora Ricezione	:	8 Agosto 2025 20:32:22
Data/Ora Inizio Diffusione		8 Agosto 2025 20:32:21
Oggetto	:	Weekly Report (August 4, 2025 – August 8, 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 (August 4, 2025 – August 8, 2025) on the First Tranche of Tenaris Share Buyback Program.

Luxembourg, August 8, 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 August 4, 2025 to (and including) August 8, 2025:

Date	Trading Venue	Shares Purchased	Weighted Average Price (EUR)	Purchases in EUR	Reference F X	Purchases in USD
4-Aug-25	MTAA	416,000	15.0553	6,263,005	1.1561	7,240,660
4-Aug-25	CEUX	248,000	15.0554	3,733,739	1.1561	4,316,576
4-Aug-25	TQEX	42,000	15.0546	632,293	1.1561	730,994
4-Aug-25	AQEU	28,035	15.0528	422,005	1.1561	487,880
5-Aug-25	MTAA	422,000	15.2753	6,446,177	1.1564	7,454,359
5-Aug-25	CEUX	255,000	15.2735	3,894,743	1.1564	4,503,880
5-Aug-25	TQEX	43,000	15.2584	656,111	1.1564	758,727
5-Aug-25	AQEU	30,000	15.2663	457,989	1.1564	529,618
6-Aug-25	MTAA	423,000	15.5157	6,563,141	1.1626	7,630,308
6-Aug-25	CEUX	266,000	15.5177	4,127,708	1.1626	4,798,874
6-Aug-25	TQEX	44,000	15.5264	683,162	1.1626	794,244
6-Aug-25	AQEU	31,000	15.5289	481,396	1.1626	559,671
7-Aug-25	MTAA	429,000	15.3829	6,599,264	1.1623	7,670,325
7-Aug-25	CEUX	273,000	15.3827	4,199,477	1.1623	4,881,052
7-Aug-25	TQEX	46,000	15.3853	707,724	1.1623	822,587
7-Aug-25	AQEU	31,000	15.3934	477,195	1.1623	554,644
8-Aug-25	MTAA	426,850	15.4066	6,576,307	1.1655	7,664,686
8-Aug-25	CEUX	282,000	15.4076	4,344,943	1.1655	5,064,031
8-Aug-25	TQEX	46,000	15.4065	708,699	1.1655	825,989
8-Aug-25	AQEU	32,000	15.3977	492,726	1.1655	574,273
		3,813,885	15.3302	58,467,805		67,863,378

From August 4, 2025 to (and including) August 8, 2025, the Company has purchased a total of 3,813,885 ordinary shares for a total consideration of €58,467,805, equivalent to USD67,863,378.

As of August 8, 2025, the Company held in treasury 26,534,450 ordinary shares equal to 2.48% 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.