Tenaris (TS) repurchases 3.32M shares in week under USD1.2B buyback

Rhea-AI Filing Summary

Tenaris S.A. provided a weekly update on its Second Tranche of the USD1.2 billion share buyback program. Between December 29, 2025 and January 2, 2026, the company repurchased 3,320,025 ordinary shares for a total consideration of €54,583,501, equivalent to USD64,206,753, in the open market.

After these transactions, as of January 2, 2026, Tenaris held 62,328,172 ordinary shares in treasury, representing 5.81% of its total issued share capital. The company states that it intends to cancel the treasury shares purchased under its buyback programs in due course.

Insights

Equity Capital Markets Analyst

Tenaris continues executing a sizable buyback, now holding 5.81% in treasury.

Tenaris reports ongoing activity under the second tranche of its USD1.2 billion share buyback, with up to USD600 million to be executed in the open market. In the week from December 29, 2025 to January 2, 2026, it repurchased 3,320,025 ordinary shares for €54,583,501 USD64,206,753), indicating continued use of cash to reduce free float.

As of January 2, 2026, Tenaris held 62,328,172 ordinary shares in treasury, equal to 5.81% of issued share capital. The company states that it intends to cancel shares purchased under the programs in due course, which, if completed, would reduce the share count. Actual effects on per-share metrics will depend on the final total repurchased and cancelled.

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 January 2, 2026

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 29 2025 – January 2, 2026) 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: January 2, 2026

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 29, 2025 – January 2, 2026) on the Second Tranche of Tenaris Share Buyback Program.

Luxembourg, January 2, 2026. - 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 29, 2025 to (and including) January 2, 2026:

From December 29, 2025 to (and including) January 2, 2026, the Company has purchased a total of 3,320,025 ordinary shares for a total consideration of €54,583,501 equivalent to USD64,206,753.

As of January 2, 2026, the Company held in treasury 62,328,172 ordinary shares equal to 5.81% 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 Form 6-K?

Tenaris reported a weekly update on the Second Tranche of its USD1.2 billion Share Buyback Program, summarizing ordinary shares repurchased from December 29, 2025 to January 2, 2026.

How many Tenaris shares were repurchased between December 29, 2025 and January 2, 2026?

Between December 29, 2025 and January 2, 2026, Tenaris repurchased 3,320,025 ordinary shares in the open market under its Second Tranche buyback program.

What was the total amount paid by Tenaris for the shares repurchased in this period?

For this period, Tenaris paid a total consideration of €54,583,501, equivalent to USD64,206,753, for the 3,320,025 ordinary shares repurchased.

How many Tenaris shares are currently held in treasury and what percentage of capital do they represent?

As of January 2, 2026, Tenaris held 62,328,172 ordinary shares in treasury, representing 5.81% of its total issued share capital.

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

The Second Tranche of Tenaris’s share buyback program forms part of a USD1.2 billion program and covers up to USD600 million to be executed in the open market.

What does Tenaris plan to do with the treasury shares acquired under its buyback programs?

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

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

Tenaris indicates that details of the transactions are available on its corporate website under the Share Buyback Program section at https://ir.tenaris.com/share-buyback-program.