Gary Harkins, John-Paul Kissock, David Worrall and Joel Byrom have now all returned to their parent clubs following the end of their loan spells.
Harkins, who joined on loan from St Mirren, made a total of 22 appearances for Latics, scoring five goals.
His teammate Worrall, who signed at the same time as the Scotsman, has returned to Rotherham United as they look for promotion via the play-offs.
Kissock and Byrom both made a handful of appearances for Latics and return to Macclesfield and Preston North End respectively.
The club would like to thank the players for their contributions during the season and wish them luck for the future.