
ExxonMobil
ExxonMobil is the largest U.S.-based oil and gas company. It was formed in 1999 by merging Exxon and Mobil. It is vertically integrated across oil and gas and its chemicals division. It produces about 3% of the world’s oil and 2% of global energy. In 2024, it emitted 610 Mt of CO2 — 1.58% of global emissions. It has faced widespread criticism and litigation over environmental incidents, including the 1989 Exxon Valdez oil spill, and for decades of climate change denial despite internal scientific accuracy.

