Major steel producers including ArcelorMittal, SSAB, thyssenkrupp, Nucor, & H2 Green Steel launched over 15 branded green steel initiatives securing 150+ customer agreements representing 150 million metric tons of annual capacity. Green steel commands €100-300 premiums per metric ton, below the International Energy Agency's $300 cost estimate, demonstrating commercial viability. H2 Green Steel pre-sold nearly 100% of its 5 million metric ton capacity before construction through long-term agreements worth over €3 billion. Europe faces 30-50 million metric ton annual shortfalls as demand outpaces supply, sustaining premiums & incentivizing capacity development while definitional ambiguity risks greenwashing absent standardized verification.