Thank you for the replies. I didn't think they moved but it seemed a strange enough rule that I wanted to clarify. Thanks for the clarification!
Like the aging one said, They don't
But, there are some instances for raiders movement on some raiders cards events i.e. move 2 raiders from adjacent locations into Last Stand.
Some Monstrosities also can "fly away" (move) to certain location if you make x success or fail on dice.
Other than that they are static.