ArcelorMittal is the world's largest steelmaker, producing iron and steel across 60 countries via blast furnaces (75% of output) and electric arc furnaces (25%).
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ArcelorMittal remains locked in coal-based steelmaking with minimal genuine decarbonization, reporting 102Mt CO₂e annually while claiming 46% cuts that dissolve to 5.4% intensity gains when adjusted for output collapse and asset sales. Scope 3 emissions are unmeasured, India JV emissions excluded from group targets, SBTi commitment abandoned, and active industry lobbying against climate policy compounds the gap between stated 2050 net-zero aspiration and near-term inaction.
ArcelorMittal scores 15/100 (Critical concern) on SINK's independent climate assessment, scored from public data only. Fees pay for the review, never the result. Last verified May 2026.
That places ArcelorMittal joint 837th of 847 companies scored, and 14th of 14 in Mining & Extraction.
ArcelorMittal sits at the bottom of the mining & extraction pack.
Among the 14 major mining & extraction brands we've scored, ArcelorMittal sits 14th of 14.
Its three lowest-scoring questions, and what the evidence didn't show.
Scope 3 emissions not quantified.
46% absolute reduction claim stems from 37% crude steel output drop and asset disposals, not decarbonization.
Not an RE100 member.
A score changes when the evidence does. We use new published evidence at the next rescore. Evidence that isn't public can count through an evidence review.
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Get in touch →Strongest on Carbon Footprint — Operations and Transparency & Accountability (6/10, 5/10). Weakest on Carbon Footprint — Supply Chain and Emissions Trajectory (2/10, 2/10).
The 3 companies in the sector scoring nearest above ArcelorMittal.
Anglo American publishes granular operational emissions data but lacks third-party GHG assurance and rejected SBTi validation.
See the breakdown →Rio Tinto reports comprehensive operational emissions data but remains the highest Scope 1 & 2 emitter among mining peers globally.
See the breakdown →Glencore is a massive mining and commodity trader with an enormous operational and supply-chain carbon footprint (416 Mt CO2e annually), minimal renewable energy adoption (3.5%), and a history of bribery convictions.
See the breakdown →The formula and all 14 sources.
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × Scale14 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
9 of 14 sources are independent of the company.
If you believe a source has been misread or a newer version exists, submit a challenge.
ArcelorMittal is the world's largest steelmaker, producing iron and steel across 60 countries via blast furnaces (75% of output) and electric arc furnaces (25%). Founded in 2006 through Mittal Steel's acquisition of Arcelor, it operates mining operations, steel mills, and related downstream facilities. Headquartered in Luxembourg, the company employs 125,416 people and generated $61.4B revenue in 2025.
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