Other than certain collaborations, like the Harsey Hunter and the Horrigan Bowie, Spartan makes their own blades (and chopsticks).
They do have outside companies do some of the other things, like make the sheaths. But they source everything from US companies, and a lot of their stuff is sourced from veteran owned firms.
I love that they make "tactical" chopsticks. I have a hard time justifying the cost of a set of titanium and carbon fiber chopsticks, but they look fun.