Investor Presentation April 2022

Decarbonization program -30% REDUCTION IN CO₂ INTENSITY TARGET 2030 per ton of steel (Scopes 1, 2 & 3) vs. 2018 values USD 80 Internal carbon per ton CO, price Collaboration with Increased Renewable scrap use electricity Energy efficiency H₂ use H₂ partners to minimize CO, footprint Alternative raw materials Carbon capture, use and storage USD 190 million investment project to build a wind farm in Argentina, which will supply close to 50% of Siderca's electric energy requirements. Working with industry partners to develop technologies involving the use of hydrogen and carbon capture. Investor Presentation Tenaris April 2022 5

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