< PrevNext > 9. McKinsey & Co. New York Share 2019 U.S.-Booked Air Volume: $265 millionConsolidated U.S. TMC: Amex GBTConsulting giant McKinsey & Co. in 2019 slightly decreased its 2019 U.S.-booked air volume from 2018 levels, according to a BTN estimate. The company even before the Covid-19 pandemic had embarked on an effort to find travel alternatives or choose travel options that are more environmentally friendly. McKinsey, which offsets all travel-related carbon emissions, in 2019 generated about 725,000 metric tons in indirect Scope 3 emissions, about 82 percent of which was generated by travel. That figure dropped from about 767,000 metric tons in 2018. The company has more than 30,000 employees, about the same as it did a year ago. McKinsey is privately held, but some published estimates put its 2019 revenue at more than $10 billion.