Bar chart showing that the investor-owned companies with the greatest share of global CO2 emissions from 2016 to 2022 are ExxonMobil, Shell, BP, Chevron and TotalEnergies, all with at least 1% of global CO2 emissions. Among state-owned entities, Saudi Aramco, Gazprom, Coal India, National Iranian Oil Co. and Rosneft have the greatest share of global CO2 emissions, all above 2%. Saudi Aramco has the greatest share at 4.8%, significantly more than Gazprom at 3.3%.