Tenaris (TS) updates investors on 2.4M-share weekly buyback activity

Rhea-AI Filing Summary

Tenaris S.A. reported progress on the second tranche of its USD1.2 billion share buyback program. From December 22, 2025 to December 26, 2025, the company repurchased 2,408,733 ordinary shares in the open market for a total consideration of €39,385,654, equivalent to USD46,224,540. As of December 26, 2025, Tenaris held 59,008,147 ordinary shares in treasury, representing 5.50% of its total issued share capital. The company states that it intends to cancel treasury shares acquired under its buyback 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 December 26, 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 (December 22, 2025 – December 26, 2025) on the Second 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: December 26, 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 (December 22, 2025 – December 26, 2025) on the Second Tranche of Tenaris Share Buyback Program.

Luxembourg, December 26, 2025. - Tenaris S.A. (NYSE and Mexico: TS and EXM Italy: TEN) (“Tenaris”) announced today that pursuant to its Second Tranche of the USD1.2 billion Share Buyback Program announced on November 2, 2025, covering up to USD600 million to be executed in the open market, it has repurchased the following ordinary shares from December 22, 2025 to (and including) December 26, 2025:

From December 22, 2025 to (and including) December 26, 2025, the Company has purchased a total of 2,408,733 ordinary shares for a total consideration of €39,385,654 equivalent to USD46,224,540.

As of December 26, 2025, the Company held in treasury 59,008,147 ordinary shares equal to 5.50% 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 its latest share buyback update?

Tenaris reported on the second tranche of its USD1.2 billion share buyback program, detailing ordinary shares repurchased in the open market between December 22 and December 26, 2025, and providing an updated total of treasury shares held.

How many Tenaris shares were repurchased between December 22 and December 26, 2025?

Between December 22 and December 26, 2025, Tenaris repurchased 2,408,733 ordinary shares under the second tranche of its share buyback program.

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

For that week, Tenaris spent a total consideration of €39,385,654, equivalent to USD46,224,540, on repurchasing its ordinary shares.

What portion of Tenaris’s share capital is currently held as treasury shares?

As of December 26, 2025, Tenaris held 59,008,147 ordinary shares in treasury, representing 5.50% of its total issued share capital.

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

The overall share buyback program amounts to USD1.2 billion, with the second tranche covering up to USD600 million to be executed in the open market.

What does Tenaris plan to do with the treasury shares it repurchases?

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

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

Detailed information on each transaction in the buyback program is available on Tenaris’s corporate website under the Share Buyback Program section.