< PrevNext > 37. SAP Walldorf, Germany Share 2017 U.S.-Booked Air Volume: $100 millionConsolidated U.S. TMC: BCDAccording to a BTN estimate, SAP's U.S.-booked air volume declined in 2017. The enterprise software giant owns online booking and expense reporting technology provider Concur and in 2018 acquired enterprise software firm CallidusCloud and software development firm Coresystems. In 2017, SAP continued a program launched in 2015 in which an internal fee is charged on business air travel in certain countries and the proceeds offset carbon emissions. In 2017, that compensated for about 135,000 metric tons of carbon dioxide equivalent, compared with 90,000 metric tons in 2016. The company continues to invest in remote conferencing tools as a method of avoiding business air travel. SAP revenue increased about 6 percent in 2017 to nearly 23.5 billion euros. The company had about 88,400 full-time equivalent employees at the end of 2017, up from about 84,200 one year earlier.