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.
21. Sheffield Wednesday - 12
Out-of-contract players: Barry Bannan, Callum Paterson, Dennis Adeniran, Jack Hunt, Dominic Iorfa, Josh Windass, Marvin Johnson, George Byers, Liam Palmer, Jaden Brown, Fisayo Dele-Bashiru, Lee Gregory. Photo: Gareth Copley
22. Accrington - 12
Out-of-contract players: Ethan Hamilton, Toby Savin, Liam Coyle, Sean McConville, Mitchell Clark, Joe Pritchard, Harvey Rodgers, Michael Nottingham, Joe Hardy, Seamus Conneely, Jack Nolan, Enock Lusiama. Photo: David Rogers
23. Burton - 12
Out-of-contract players: Sam Winnall, Ben Garratt, Cameron Borthwick-Jackson, Jonny Smith, Adedeji Oshilaja, Conor Shaughnessy, Terry Taylor, Michael Mancienne, Louis Moult, Mustapha Carayol, Chris McCann, Tom Hewlett. Photo: Nathan Stirk
24. Cambridge - 13
Out-of-contract players: Ryan Bennett, Sam Smith, George Williams, Harvey Knibbs, Paul Digby, Dimitar Mitov, Shilow Tracey, Lloyd Jones, Liam O’Neil, Ben Worman, Lewis Simper, Fejiri Okenabirhie, Louis Chadwick. Photo: Pete Norton