Some managers will be using the next seven days to try and bolster their ranks as the season reaches its climax, but Simpson does not see any need to boost his ranks as The Shrews continue to mount a serious challenge for promotion to League One.
"At this moment in time, I'm not thinking there will be movement in," he told the club's official website.
"We have a big squad of players here and, although I'm always looking to improve, I fully appreciate the support the chairman has given us to bring the amount of players in that we've got.
"So unless we get some movement of players going (out the door) then I don't expect there to be much happening.
"But I still believe with the squad that we've got here, when they're all on their game, I think we've got enough to be able to compete at the top end of the table."