Tenaris S.A.

Transaction in Own Shares • Aug 23, 2025

Informazione Regolamentata n. 0602-31-2025		Data/Ora Inizio Diffusione 23 Agosto 2025 01:12:57	Euronext Milan
Societa'	:	TENARIS
Identificativo Informazione Regolamentata	:	209363
Utenza - referente	:	TENARISN02 - Sardagna Giovanni
Tipologia	:	2.4
Data/Ora Ricezione	:	23 Agosto 2025 01:12:57
Data/Ora Inizio Diffusione	:	23 Agosto 2025 01:12:57
Oggetto	:	Weekly Report (August 18, 2025 – August 22, 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 18, 2025 – August 22, 2025) on the First Tranche of Tenaris Share Buyback Program.

Luxembourg, August 22, 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 18, 2025 to (and including) August 22, 2025:

Date	Trading Venue	Shares Purchased	Weighted Average Price (EUR)	Purchases in EUR	Reference FX	Purchases in USD
18-ago-25	MTAA	70,000	15.2993	1,070,951	1.1663	1,249,050
19-ago-25	MTAA	70,000	15.4859	1,084,013	1.1672	1,265,260
20-ago-25	MTAA	70,000	15.3646	1,075,522	1.1665	1,254,596
21-ago-25	MTAA	70,000	15.3745	1,076,215	1.1615	1,250,024
22-ago-25	MTAA	70,000	15.6105	1,092,735	1.1717	1,280,358
		350,000	15.4270	5,399,436		6,299,288

From August 18, 2025 to (and including) August 22, 2025, the Company has purchased a total of 350,000 ordinary shares for a total consideration of €5,399,436, equivalent to USD6,299,288.

As of August 22, 2025, the Company held in treasury 28,656,193 ordinary shares equal to 2.67% 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.