The 22-year-old looks set to leave Parkhead for pastures new and his name has been linked with a move to Hillsborough, reports the Sheffield Star.
He has only played 8 times for the Scottish cup winners - although one of those appearances was in the Champions League.
If McManus does come south of the border, he will join compatriots JP McGovern, Lee Bullen and Steve MacLean at S6.
Meanwhile Wednesday have reminded fans to renew their season tickets by the 18th June to get the best possible discounts.