Original filing text · Part I

Item 3 — Quantitative and Qualitative Disclosures About Market Risk

Metallus Inc. · 10-Q · Q2 FY2026 · Period ended Jun 30, 2026

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For quantitative and qualitative disclosures about market risk, see Item 7A “Quantitative and Qualitative Disclosures About Market Risk” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2025. There were no material changes in our exposure to market risk since December 31, 2025. 30 Table of Contents