Investor Presentaiton

Vertical integration benefits Our magnesite raw material assets are amongst the lowest cost globally DBM 98: Indicative cost curve Eskisher Brumado RHIM assets Global DBM assets (non RHIM) Investor Presentation | March 2024 EBITA margin contribution RHI standalone RHI Magnesita 13.9% 14.0% RHI MAGNESITA 11.5% 11.6% 11.4% 11.0% 5.0% 5.5% 9.7% 2.4% 2.5% 1.7% 3.2% 7.7% 3.8% 2.6% 9.7% 9.0% 9.1% 9.1% 8.4% 7.8% 5.9% 5.1% 2016 2017 2018 2019 2020 2021 2022 2023 Vertical integration margin Refractory margin 9

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