< PrevNext > 6. McKinsey & Co. New York Share 2018 U.S.-Booked Air Volume: $285 millionConsolidated U.S. TMC: Amex GBTBTN estimates that privately held consulting giant mckinsey & Co.’s U.S.-booked air travel rose more than 10 percent in 2018. The company has about $10 billion in annual sales, according to the Financial Times, and has about 30,000 employees, up about 2,000 from one year earlier. Mckinsey accounted for 787,000 metric tons of carbon dioxide equivalent emissions in 2018, about 83 percent of which was generated by employee air travel. A portion of the remainder was generated by hotel accommodations. Mckinsey on the whole had 780,000 metric tons of such emissions in 2017. While the company’s consultants are among the most frequent of flyers, mckinsey nevertheless is exploring ways of reducing travel, including adding videoconferencing capabilities and other remote collaboration options.