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.
1. Oxford United - 2
Out-of-contract players: Yanic Wildschut, Djavan Anderson. Photo: Richard Heathcote
2. Peterborough - 3
Out-of-contract players: Nathan Thompson, Joe Ward, Emmanuel Fernandez. Photo: Catherine Ivill
3. Fleetwood - 3
Out-of-contract players: Daniel Batty, Darnell Johnson, Harrison Holgate. Photo: Pete Norton
4. Forest Green - 5
Out-of-contract players: Ben Stevenson, Udoka Godwin-Malife, Dylan McGeouch, Baily Cargill, Lewis Thomas. Photo: Pete Norton