< PrevNext > 39. Merck Kenilworth, N.J. Share 2015 U.S.-Booked Air Volume: $100 millionPrincipal Card Supplier: American ExpressConsolidated U.S. TMC: American Express Global Business TravelMerck's revenue dipped 6.5 percent in 2015 to about $39.5 billion, but BTN estimates the pharmaceutical firm’s 2015 U.S.-booked air volume increased from 2014. For 2015, Merck reported 144,400 metric tons of carbon dioxide-equivalent emissions related to business travel—including air and rail travel, car rentals and hotel stays—up about 20 percent year over year. The company finalized a reorganization of its TMC services this year. American Express Global Business Travel now provides service in the Americas and Europe, while BCD Travel handles the Asia/Pacific region. Previously, Amex provided service in North America and Asia/Pacific, while BCD handled parts of Europe and Latin America.Merck works with Amex GBT for strategic meetings management services and American Express for corporate card services. The company encourages the use of remote conferencing tools as an alternative to traveling for business or meetings. Merck also offers within its online booking tool an option to book rail travel as a means of reducing the company’s carbon footprint. The firm had 68,000 employees at the end of 2015, down from 70,000 one year earlier.