< PrevNext > 28. Royal Dutch Shell The Hague, Netherlands Share 2018 U.S.-Booked Air Volume: $120 millionPrimary Global Expense Supplier: Concur Consolidated Global TMC: CWTBTN estimates that U.S.-booked air spending at oil and gas giant Royal Dutch Shell rose $20 million in 2018. Revenue increased more than 27 percent to $388.4 billion, and its income increased from $13.4 billion in 2017 to $23.9 billion in 2018. Shell's 2018 business air travel emissions totaled 200,000 metric tons of carbon dioxide equivalent, down from 210,000 the year before. The company employed 81,000 people at year-end 2018, down from 83,000 in 2017.