< PrevNext > 38. United Technologies Farmington, Conn. Share 2016 U.S.-Booked Air Volume: $104 millionConsolidated Global TMC: Amex GBTManufacturing and aerospace conglomerate United Technologies Corp. in 2016 spent about the same as it did in 2015 on U.S.-booked air travel, according to a BTN estimate. Considering the November 2015 sale to Lockheed Martin of the 16,000-employee subsidiary Sikorsky Aircraft Corp., United Technologies' flat spend likely reflects increased activity. 2016 sales for UTC—the parent company of Pratt & Whitney aircraft engines, Otis elevators and Carrier HVAC and refrigeration systems, among others—increased 2 percent year over year $57.2 billion. Operating income increased 12 percent to about $8.2 billion. In 2015, it restricted business class to flights of at least 12 hours. By 2020, UTC aims to reduce carbon emissions generated by business travel by 3 percent a year, using a 2015 baseline. In 2015, business air travel and car rental use generated 109,900 metric tons of carbon dioxide equivalent. At the end of 2016, UTC employed 201,600, up from the 197,200 it employed at the end 2015 after the Sikorsky sale.