< PrevNext > 66. Abbvie North Chicago, Ill. Share 2018 U.S.-Booked Air Volume: $62 millionBTN estimate pharmaceutical firm abbvie decreased its U.S.-booked air spend in 2018. Revenue for the maker of rheumatoid arthritis drug Humira and other pharmaceuticals increased 16 percent to nearly $32.8 billion. The company employed about 30,000 people at the end of January 2019, about 1,000 more than it had one year earlier. In June 2019, abbvie announced plans to acquire fellow CT 100 pharma company Allergan for about $63 billion, pending the approval of shareholders and federal regulators.