Tenaris (NYSE: TS) logs 179,100-share buyback in first tranche program

Rhea-AI Filing Summary

Tenaris S.A. filed a Form 6-K reporting weekly activity under the first tranche of its share buyback program. The company is executing a tranche of up to USD600 million within a broader USD1.2 billion buyback plan announced on June 6, 2025. From September 15, 2025 to September 19, 2025, Tenaris repurchased 179,100 ordinary shares for total consideration of €2,704,541, equivalent to USD3,203,339. As of September 19, 2025, Tenaris held 29,678,298 ordinary shares in treasury, representing 2.77% of its total issued share capital. The company states it intends to cancel treasury shares acquired under the programs in due course.

FORM 6 - K

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Report of Foreign Private Issuer

Pursuant to Rule 13a - 16 or 15d - 16 of

the Securities Exchange Act of 1934

As of September 19, 2025

TENARIS, S.A.

(Translation of Registrant's name into English)

26, Boulevard Royal, 4th floor

L-2449 Luxembourg

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or 40-F.

Form 20-F ✓ Form 40-F        

The attached material is being furnished to the Securities and Exchange Commission pursuant to Rule 13a-16 and Form 6-K under the Securities Exchange Act of 1934, as amended. This report contains Tenaris’s Weekly Report (September 15, 2025 – September 19, 2025) on the First Tranche of Tenaris Share Buyback Program.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: September 19, 2025

Tenaris, S.A.

By: /s/ Giovanni Sardagna

Giovanni Sardagna

Investor Relations Officer

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:

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.

FAQ

What did Tenaris (TS) report in this Form 6-K?

Tenaris reported a weekly update on the first tranche of its share buyback program, detailing ordinary shares repurchased between September 15 and 19, 2025 and its updated treasury share position.

How many Tenaris shares were repurchased between September 15 and 19, 2025?

Between September 15 and 19, 2025, Tenaris repurchased 179,100 ordinary shares under the first tranche of its share buyback program.

What was the total amount spent by Tenaris on share buybacks for this week?

For this period, Tenaris spent €2,704,541, equivalent to USD3,203,339, to repurchase 179,100 ordinary shares.

How many treasury shares does Tenaris hold after these repurchases?

As of September 19, 2025, Tenaris held 29,678,298 ordinary shares in treasury, equal to 2.77% of its total issued share capital.

What is the size of Tenaris’s current share buyback program?

The first tranche of Tenaris’s share buyback program covers up to USD600 million to be executed in the open market, within a broader USD1.2 billion share buyback program announced on June 6, 2025.

What does Tenaris intend to do with the repurchased shares?

Tenaris states that it intends to cancel treasury shares purchased under its buyback programs in due course.

Where can investors find detailed transaction data for Tenaris’s buyback?

Detailed information on the buyback transactions is available on Tenaris’s corporate website under the Share Buyback Program section.