2015 Fortune rank: 794
2019 rank: None
Employee trend: Job cuts — from 35,000 in 2015 to 10,720 two years later
In 1986, West started in Omaha as a telemarketer and diversified into a telecommunications service company over the years. In 2017, the private equity firm Apollo Global Management bought the company, and West was renamed Intrado Corporation in summer 2019.