Town boss Paul Jewell says a number of the Blues' younger players have committed to remaining at the club for next season, including central defender Troy Brown.
Jewell said: "I think Jack Ainsley’s signed his deal, I don’t think Tom Eastman has yet. I think Conor Hourihane’s agreed to his, as far as I’m aware. Troy Brown’s agreed his.”
Ainsley, Eastman and Hourihane were offered six-month deals, while Brown was handed another year at Portman Road.
Ronan Murray and Luke Hyam had previously signed one-year contracts.