< PrevNext > 62. Koch Wichita, Kan. Share 2019 U.S.-Booked Air Volume: $63 millionPrimary U.S. Online Booking Tool: ConcurPrimary U.S. Expense Supplier: ConcurConsolidated Global TMC: CWTBTN estimates that privately held conglomerate Koch cut U.S.-booked air volume by 19 percent in 2019, compared to 2018 volume. The company operates in 60 countries and is parent to well-known brands like paper and building product manufacturer Georgia-Pacific, fuel and chemical producer Flint Hills Resources and, since April of this year, the business software leader Infor. It generates approximately $110 billion in annual revenue, according to Forbes, and employed 130,000 in 2019.