Tenaris S.A.

Transaction in Own Shares • Sep 19, 2025

Informazione Regolamentata n. 0602-35-2025		Data/Ora Inizio Diffusione 19 Settembre 2025 23:09:52	Euronext Milan
	:
Societa'		TENARIS
Identificativo Informazione Regolamentata	:	210107
Utenza - referente	:	TENARISN02 - Sardagna Giovanni
Tipologia	:	2.4
Data/Ora Ricezione	:	19 Settembre 2025 23:09:52
Data/Ora Inizio Diffusione	:	19 Settembre 2025 23:09:52
Oggetto	:	Weekly Report (September 15, 2025 – September 19, 2025) on the First Tranche of Tenaris Share Buyback Program.
Testo del comunicato

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

Weekly Report (September 15, 2025 – September 19, 2025) on the First Tranche of Tenaris Share Buyback Program.

Luxembourg, September 19, 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 USD600 million to be executed in the open market, it has repurchased the following ordinary shares from September 15, 2025 to (and including) September 19, 2025:

Date	Trading Venue	Shares Purchased	Weighted Average Price (EUR)	Purchases in EUR	Reference F X	Purchases in USD
15-sep-25	MTAA	5,500	15.2602	83,931	1.1758	98,686
16-sep-25	MTAA	56,000	15.2484	853,910	1.1849	1,011,798
17-sep-25	MTAA	111,000	15.0230	1,667,553	1.1851	1,976,134
18-sep-25	MTAA	5,600	15.0386	84,216	1.1775	99,165
19-sep-25	MTAA	1,000	14.9307	14,931	1.1759	17,556
		179,100	15.1007	2,704,541		3,203,339

From September 15, 2025 to (and including) September 19, 2025, the Company has purchased a total of 179,100 ordinary shares for a total consideration of €2,704,541, equivalent to USD3,203,339.

As of September 19, 2025, the Company held in treasury 29,678,298 ordinary shares equal to 2.77% 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.