FORM6 - K

SECURITIESAND EXCHANGE COMMISSION

Washington,D.C. 20549

Reportof Foreign Private Issuer

Pursuantto Rule 13a - 16 or 15d - 16 of

theSecurities Exchange Act of 1934

Asof July 31, 2025

TENARIS,S.A.

(Translationof Registrant's name into English)

26,Boulevard Royal, 4th floor

L-2449Luxembourg

(Addressof principal executive offices)

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

Form20-F   ✓   Form 40-F       

Theattached material is being furnished to the Securities and Exchange Commission pursuant to Rule 13a-16 and Form 6-K under the SecuritiesExchange Act of 1934, as amended. This report contains Tenaris’s announcement regarding Tenaris 2025 Second Quarter Results ConferenceCall.

SIGNATURE

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

Date:July 31, 2025

Tenaris,S.A.

By:/s/ Giovanni Sardagna

GiovanniSardagna

InvestorRelations Officer

Giovanni Sardagna

Tenaris

1-888-300-5432

www.tenaris.com

TenarisS.A 2025 Second Quarter Results Conference Call.

On31^st July 2025, Paolo Rocca, Chairman and Chief Executive Officer of Tenaris S.A. (“Tenaris” or the “Company”)and other members of the Company’s senior management participated in an audio conference with investors and analysts to discuss,among other things, the Company’s results, market background and outlook. You may access the audio conference at Tenaris InvestorRelations website at: https://ir.tenaris.com/static-files/24202efb-9f4f-4903-9a47-03a9a1db7df4.

CautionaryStatement Regarding Forward-Looking Statements

Theaudio conference referred to above contains “forward-looking statements.” Forward-looking statements are based on management’scurrent views and assumptions and involve known and unknown risks that could cause actual results, performance or events to differ materiallyfrom those expressed or implied by those statements. These statements include information regarding management strategy, investment plans,development and growth of the steel pipe and oil and gas industries, trends and other prospective data, including trends regarding thedevelopment of raw material costs and the levels of investment in oil and gas drilling worldwide and general economic conditions in thecountries where Tenaris operates and sells its products and services. By their nature, certain disclosures relating to these and otherrisks are only estimates and could be materially different from what actually occurs in the future. As a result, actual future gainsor losses that may affect our financial condition and results of operations could differ materially from those that have been estimated.You should not place undue reliance on the forward-looking statements, which speak only as of the date of this conference call. Exceptas required by law, we are not under any obligation, and expressly disclaim any obligation to, update or alter any forward-looking statements,whether as a result of new information, future events or otherwise.

Tenarisis a leading global supplier of steel tubes and related services for the world’s energy industry and certain other industrial applications.