# EDGAR Filing Document

**Accession Number:** 0001190723
**File Stem:** 0001171843-25-006874
**Filing Date:** 2025-11
**Character Count:** 4293
**Document Hash:** acac233c6fe2c81f485809cf8c3ca3e1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001171843-25-006874.hdr.sgml**: 20251103

**ACCESSION NUMBER**: 0001171843-25-006874

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20251102

**FILED AS OF DATE**: 20251103

**DATE AS OF CHANGE**: 20251103

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** TENARIS SA
- **CENTRAL INDEX KEY:** 0001190723
- **STANDARD INDUSTRIAL CLASSIFICATION:** STEEL WORKS, BLAST FURNACES  ROLLING MILLS (COKE OVENS) [3312]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 000000000

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-31518
- **FILM NUMBER:** 251441973

**BUSINESS ADDRESS:**
- **STREET 1:** 26, BOULEVARD ROYAL, 4TH FLOOR
- **CITY:** LUXEMBOURG
- **STATE:** N4
- **ZIP:** L-2449
- **BUSINESS PHONE:** 1-888-300-5432

**MAIL ADDRESS:**
- **STREET 1:** 26, BOULEVARD ROYAL, 4TH FLOOR
- **CITY:** LUXEMBOURG
- **STATE:** N4
- **ZIP:** L-2449

**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 November 2, 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 <u>Ö</u> 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 Press Release announcing Tenaris to Commence a USD 600 million Second Tranche of its USD 1.2 Billion 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: November 2, 2025

Tenaris, S.A.

By: /s/ Giovanni Sardagna

Giovanni Sardagna

Investor Relations Officer

![](hdr.jpg)

Giovanni Sardagna

Tenaris

1-888-300-5432

www.tenaris.com

### Tenaris to Commence a USD 600 million Second Tranche of its USD 1.2 Billion Share Buyback Program
**Luxembourg, November 2, 2025. -** Tenaris S.A. (NYSE and Mexico: TS and EXM Italy: TEN) ("Tenaris") announced today that pursuant to its USD 1.2 billion Share Buyback Program (the "Program") announced on May 27, 2025, it has entered into a non-discretionary buyback agreement with a primary financial institution (the "Bank") for the execution of its second tranche, covering up to the remainder USD 600 million of the Program (excluding customary transaction fees). This second tranche shall start on November 3, 2025, and end no later than April 30, 2026.

The Bank will make its trading decisions concerning the timing of the purchases of Tenaris's ordinary shares independently of and uninfluenced by Tenaris. The Program will be executed in compliance with applicable rules and regulations, including the Market Abuse Regulation 596/2014 and the Commission Delegated Regulation (EU) 2016/1052 (the "Regulations"). Under the buyback agreement, purchases of shares may continue during any closed periods of Tenaris in accordance with the Regulations.

Ordinary shares purchased under the Program will be cancelled in due course.

Any buyback of ordinary shares pursuant to the Program will be carried out under the authority granted by the general meeting of shareholders held on May 6, 2025.

*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.*