If these are US company on US territory naked no-poach agreements in place, they are black letter law flatly illegal [1]. "No-poach agreements are naked if they are not reasonably necessary to any separate, legitimate business collaboration between the employers."

I would be extremely surprised if these are wet-ink-signed naked no-poach agreements.

[1] https://www.justice.gov/atr/division-operations/division-upd...