Goalkeeper Nick Townsend and midfielder Charlee Adams have both had one-year contract options implemented.
Elsewhere defenders James Fry and Amari'i Bell have both been offered new terms.
Meanwhile strikers Akwasi Asante and Reece Hales and right-back Ryan Higgins have all been informed that they will be released once their current deals expire at the end of this current season.
Asante made one first-team appearance as a late substitute during the 3-0 UEFA Europa League play-off second-leg victory over C.D. Nacional at St. Andrew's in August 2011. Similarly Hales made a brief senior appearance as a late substitute during the 1-1 FA Cup with Budweiser third-round draw with Leeds United
at Elland Road in January 2013.
Right-back Higgins never managed a first-team breakthrough but was a regular for the U21s side and has spent the bulk of this season on-loan at Leamington.
The club wishes all three well for the next stage of their careers.