Those are, of course, excluding the Blues’ four loan stars - whose agreements come to a conclusion at the end of the season.
Among those contracted names who have their deals coming to an end at the close of the campaign include Ronan Curtis, Jay Mingi, Louis Thompson & Clark Robertson.
With the January window recently closing, John Mousinho has revealed Pompey are yet to hold talks with a large number of those players - with Mingi one exception.
But with 10 players currently without a deal at Fratton Park beyond the end of the season, how does that figure compare to the rest of League One?
With help from Transfermarkt, we’ve taken a look at which third-tier club has the most stars out-of-contract in the summer.
Here’s what we found.
9. Lincoln - 6
Out-of-contract players: Adam Jackson, Joe Walsh, Max Sanders, Charles Vernam, Jordan Wright, Sean Roughan. Photo: James Chance
10. Ipswich - 7
Out-of-contract players: Massimo Luongo, Sone Aluko, Janoi Donacien, Joel Coleman, Richard Keogh, Kane Vincent-Young, Nick Hayes. Photo: Alex Davidson
11. Shrewsbury - 8
Out-of-contract players: Luke Leahy, Tom Bloxham, Ryan Bowman, Daniel Udoh, George Nurse, Elliott Bennett, Harry Burgoyne, Charlie Caton. Photo: Pete Norton
12. Derby - 8
Out-of-contract players: Jason Knight, Conor Hourihane, David McGoldrick, James Chester, Craig Forsyth, Curtis Davies, Richard Stearman, Scott Loach. Photo: Naomi Baker