< PrevNext > 49. GSK London Share 2017 U.S.-Booked Air Volume: $82 millionConsolidated U.S. TMC: BCDPharmaceutical giant GSK in 2017 increased its U.S.-booked air travel spend less than 4 percent, according to a BTN estimate. Travel by GSK's sales force, not including other forms of business travel by air or car, accounted for about 147,000 metric tons of carbon dioxide equivalent emissions, down from about 150,000 in 2016. GSK's 2017 revenue increased by about 3 percent to about 30.2 billion pounds, applying a constant exchange rate, as the company's pharmaceuticals, vaccines and consumer healthcare businesses each showed growth. Selling, general and administration expenses increased from about 9.4 billion pounds in 2016 to 9.7 billion in 2017; under constant currency exchange levels, they declined 1 percent. The company at year-end 2017 employed about 98,500 people, down slightly from the 99,300 a year earlier. GSK in June 2018 completed a $13 billion buyout of the 36.5 percent share held by Novartis in a consumer healthcare joint venture between the two companies.