Discover the world s largest shipping companies ranked.
The podium below showcases the three shipping companies achieving the highest annual CO2 reduction rates. These industry leaders demonstrate the strongest commitment to decarbonizing their fleet operations.
Annual CO2 reduction percentage is the primary metric in this ranking, measuring each carrier's year-over-year decrease in total CO2 equivalent emissions. Higher reduction rates indicate more effective decarbonization strategies and operational improvements.
Data is collected from carrier sustainability reports, IMO emissions filings, and verified environmental disclosures.
Reduction claims are cross-referenced with independent environmental audits and third-party emissions databases.
The comprehensive table below ranks shipping companies by their annual CO2 reduction performance. Additional metrics on fleet emissions and alternative fuel adoption provide further context on each company's environmental progress.
Source: Seadex aggregated data, 2026
The top 10 carriers represent 0.0% of the global metric across 16 companies.
Average value across the 16 carriers tracked in our database.
Combined value across all carriers with available data.
Source: Seadex aggregated data, 2026
European carriers lead in CO2 reduction rates, driven by EU ETS inclusion and ambitious corporate sustainability targets.
Asian carriers are accelerating their decarbonization efforts with significant fleet renewal and technology investment.
Companies are ranked by the annual percentage reduction in total CO2 equivalent emissions across their operations.
Rankings are updated quarterly to reflect the latest emissions data, fleet changes, and operational improvements.
Annual CO2 reduction rate is a critical indicator of a carrier's progress toward decarbonization and environmental responsibility.
Consistent annual CO2 reductions demonstrate a carrier's tangible commitment to combating climate change and meeting global targets.
The IMO requires progressive emissions reductions, making year-over-year improvement essential for operational licensing and market access.
Carriers achieving significant CO2 reductions attract environmentally conscious customers and benefit from carbon credit programs.
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View Volume Transported rankingRanking by container fleet capacity (M TEU)
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Ranking by number of maritime lines
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Compare the Energy Efficiency Design Index of different shipping companie.
Ranking by annual CO2 reduction (EEOI)
See which companies are improving their Energy Efficiency Operational Indicator the fastest
Ranking by containers lost (% of moved TEU)
Compare companies based on their container safety record and loss prevention
Ranking by annual CO2 reduction (total operations)
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Ranking by annual CO2 reduction (fleet only)
Compare companies based on how quickly they re reducing their fleet emissions
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Discover which companies are leading in the adoption of cleaner fuel technologies
Total fleet emissions (ktons CO2eq, Scope 1)
Compare the absolute emissions from shipping fleets without adjusting for company size
Total company emissions (ktons CO2eq)
See the total carbon footprint of shipping companies including all operations
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Compare the lifecycle CO2 emissions of shipping companies from fuel production to vessel operation
Ranking by annual % CO2 reduction (Scope 1)
Track which shipping companies are achieving the fastest annual reduction in direct CO2 emissions
Ranking by annual revenue (USD bn)
Compare shipping companies based on their annual revenue and market share
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Discover the leading shipping companies headquartered in each major maritime nation.