Is a trucking company a defense company if they ship something for the military? Or the same with air transport?
Quite a lot faster than that actually; Mach 20+ on reentry. The way the media talks about "hypersonics" without getting into specifics is very misleading. Hypersonic cruise missiles are a tough nut to crack, but hypersonic reentry vehicles are table stakes for ballistic missiles and spacecraft.
Any company doing shipping for the military has large government contracts. The government contracts have turnover limits, and every company this large works with the government a lot.