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.
17. Pompey - 10
Out-of-contract players: Ronan Curtis, Josh Oluwayemi, Michael Jacobs, Ryan Tunnicliffe, Connor Ogilvie, Clark Robertson, Kieron Freeman, Louis Thompson, Jay Mingi, Jayden Reid. Photo: Jason Brown
18. Charlton - 11
Out-of-contract players: Michael Hector, Macauley Bonne, George Dobson, Sean Clare, Ashley Maynard-Brewer, Albie Morgan, Ryan Inniss, Terrell Thomas, Nathan Harness, Charles Clayden, Aaron Henry. Photo: Naomi Baker
19. Port Vale - 11
Out-of-contract players: James Wilson, Nathan Smith, Ben Garrity, Jamie Proctor, David Worrall, Tom Pett, Dennis Politic, Mal Benning, Dan Jones, Sam Robinson, Aidan Stone. Photo: Morgan Harlow
20. Exeter - 12
Out-of-contract players: Jamal Blackman, Josh Key, Jevani Brown, Kevin MacDonald, Pierce Sweeney, Archie Collins, Alex Hartridge, Gary Woods, Jack Sparkes, Cheick Diabate, Scott Brown, Harry Kite. Photo: Pete Norton