< PrevNext > 79. Allergan Dublin Share 2019 U.S.-Booked Air Volume: $50 millionAfter debuting in the BTN 100 in 2015, Dublin-based pharmaceutical company Allergan saw its U.S.-booked air spend drop for the fourth consecutive year. BTN estimated 2019 volume declining by $8 million. However, after a one-year dip in employee base in 2018, the company resumed growing its workforce, adding about 500 jobs in 2019 to reach 17,400 employees. Fellow CT100-ranked pharmaceutical company Abbvie acquired in May 2020. The combined company now comprises a total of nearly 50,000 employees—and is likely to be a major account on future travel program rankings.