TS Tenaris

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: May 6, 2019.

Tenaris, S.A.

By: /s/ Cecilia Bilesio

Cecilia Bilesio

Corporate Secretary

Summary of the resolutions adopted in the Annual General Meeting of Shareholders (the “ Meeting ”) of Tenaris S.A. (the " Company ") held on 6 May 2019, at 29, avenue de la Porte-Neuve, 3 ^rd Floor, L-2227, Luxembourg at 9:30 a.m. (Luxembourg time)

The Annual General Meeting of Shareholders resolved to acknowledge the consolidated management report and related management certifications on the Company’s consolidated financial statements as of and for the year ended 31 December 2018, and on the Company’s annual accounts as at 31 December, 2018, and the external auditors’ reports on such consolidated financial statements and annual accounts.

The Annual General Meeting of Shareholders resolved to approve the Company’s consolidated financial statements as of and for the year ended 31 December 2018.

The Annual General Meeting of Shareholders resolved to approve the Company’s annual accounts as at 31 December 2018.

The Annual General Meeting of Shareholders resolved (i) to approve a dividend for the year ended 31 December, 2018, in the aggregate amount of US$0.41 per share (or US$0.82 per ADR), which represents an aggregate sum of approximately US$484 million, and which includes the interim dividend of US$0.13 per share (or US$0.26 per ADR) paid in November 2018, (ii) to authorize the Board of Directors to determine or amend, in its discretion, the terms and conditions of the dividend payment so approved, including the applicable record date, (iii) to make the dividend payment in U.S. dollars on 22 May, 2019, in the amount of US$0.28 per share (or US$0.56 per ADR), pursuant to this resolution out of the Company’s retained earnings reserve; and (iv) that the loss of the year ended 31 December, 2018, be absorbed by the Company’s retained earnings account

The Annual General Meeting of Shareholders resolved to discharge all those who were members of the Board of Directors throughout the year ended 31 December 2018, from any liability in connection with the management of the Company’s affairs during such year.

The Annual General Meeting of Shareholders resolved to (i) maintain the number of members of the Board of Directors at eleven; and (ii) re-appoint Mr. Roberto Bonatti, Mr. Carlos Condorelli, Mr. Germán Curá, Mr. Roberto Monti, Mr. Gianfelice Mario Rocca, Mr. Paolo Rocca, Mr. Jaime Serra Puche, Mr. Yves Speeckaert, Ms. Mónica Tiuba, Mr. Amadeo Vázquez y Vázquez and Mr. Guillermo Vogel to the Board of Directors; each to hold office until the next annual general meeting of shareholders that will be convened to decide on the Company’s 2019 annual accounts.

The Annual General Meeting of Shareholders resolved that (i) each of the members of the Board of Directors receive an amount of US$115,000 as compensation for his/her services during the fiscal year 2019; (ii) each of the members of the Board of Directors who are members of the Audit Committee receive an additional fee of US$55,000 and; (iii) the Chairman of such Audit Committee receive, further, an additional fee of US$10,000. In all cases, the approved compensation will be net of any applicable Luxembourg social security charges.

The Annual General Meeting of Shareholders resolved to (i) appoint PricewaterhouseCoopers S.C., Réviseurs d’entreprises agréé , as the Company’s external auditors for the fiscal year ending 31 December, 2019, to be engaged until the next annual general meeting of shareholders that will be convened to decide on the Company’s 2019 annual accounts; and (ii) approve the external auditors’ fees for audit, audit-related, tax compliance and tax advisory services, and other permitted non-audit services to be rendered during the fiscal year ending 31 December, 2019, broken-down into five currencies (Argentine Pesos, Brazilian Reais, Euro, Mexican Pesos and U.S. Dollars), up to a maximum amount for each currency equal to ARS 61,977,974, BRL 347,031, EUR 1,401,139, MXN 3,891,610, and US$ 489,555, and (iii) authorize the Audit Committee to approve any increase or reallocation of the external auditors’ fees as may be necessary, appropriate or desirable under the circumstances.

The Annual General Meeting of Shareholders resolved to authorize the Board of Directors to cause the distribution of all shareholder communications, including its shareholder meeting and proxy materials and annual reports to shareholders (either in the form of a separate annual report containing financial statements of the Company and its consolidated subsidiaries or in the form of an annual report on Form 20-F or similar document, as filed with the securities authorities or stock markets) by such electronic means as are permitted or required by any applicable laws or regulations (including any interpretations thereof), including, without limitation, by posting such communication on the Company’s website, or by sending electronic communications (e-mails) with attachment(s) in a widely used format or with a hyperlink to the applicable filing by the Company on the website of the above referred authorities or stock markets, or by any other existing or future electronic means of communication as is or may be permitted by any applicable laws or regulations.