2023 U.S.-Booked Air Volume: $65 million
Koch Industries changed its name to Koch Inc. in June 2024 to reflect its transformation from an industrial business to a “company involved in technology of all kinds.” It is the second-largest private company in the U.S., according to Forbes.
Koch has 300 manufacturing sites in the U.S. and 100 more globally. It employs about 120,000 people in more than 50 countries, with half of them in the U.S. According to the company, annual revenue exceeds $125 billion.