VALLOUREC : DISCLOSURE OF TRADING IN OWN SHARES FROM 03/02/2026 TO 03/06/2026

DISCLOSURE OF TRADING IN OWN SHARES

FROM 03/02/2026 TO 03/06/2026

Meudon (France), on March 9^th, 2026

Share buyback program (ISIN Code : FR0013506730) implemented in accordance with the authorization given by the Shareholders ' General Meeting of Vallourec SA (LEI : 969500P2Q1B47H4MCJ34) on May 22, 2025 (ninth resolution).

About Vallourec

Vallourec is a world leader in premium tubular solutions for the energy markets and for demanding industrial applications such as oil & gas wells in harsh environments, new generation power plants, challenging architectural projects, and high-performance mechanical equipment. Vallourec’s pioneering spirit and cutting edge R&D open new technological frontiers. With close to 13,000 dedicated and passionate employees in more than 20 countries, Vallourec works hand-in-hand with its customers to offer more than just tubes: Vallourec delivers innovative, safe, competitive and smart tubular solutions, to make every project possible.

Listed on Euronext in Paris (ISIN code: FR0013506730, Ticker VK), Vallourec is part of the CAC Mid 60, SBF 120 and Next 150 indices and is eligible for Deferred Settlement Service.

In the United States, Vallourec has established a sponsored Level 1 American Depositary Receipt (ADR) program (ISIN code: US92023R4074, Ticker: VLOWY). Parity between ADR and a Vallourec ordinary share has been set at 5:1.

For further information, please contact:

Attachment

• Vallourec_Share_Buyback_Reporting_2026_March_2_6

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