Company: TNRSF
Filing Date: 2025-03-05
Form Type: 6-K
Source: 0001171843-25-001254
Chunk: 0

Company: TENARIS SA
Filing Date: 2025-03-05
Form: 6-K
Chunk 0
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<div align='center'>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</div>

As of March 4, 2025

<div align='center'>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</div>

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 Press Release
announcing Tenaris completes its USD700 Million Share Buyback Program.

<div align='center'>SIGNATURE</div>

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: March 4, 2025

<div align='center'>Tenaris, S.A.</div>

By: /s/ Giovanni Sardagna

Giovanni Sardagna

Investor Relations Officer

Giovanni Sardagna

Tenaris

1-888-300-5432

www.tenaris.com

Tenaris completes its USD700 Million Share Buyback Program

Luxembourg, March 4, 2025. - Tenaris S.A. (NYSE and Mexico: TS and
EXM Italy: TEN) (“Tenaris”) announced today the completion of its USD700 million Share Buyback Program announced on November
10, 2024 (the “Program”).

During the Program, which ran from November 11, 2024, to (and including)
March 4, 2025, the Company purchased a total of 36,862,132 ordinary shares, representing 3.17% of the total issued share capital at the
beginning of the Program, for a total consideration of €668,198,121, or approx. USD700 million.

As of March 4, 2025,