Key figures including Sean Raggett, Marlon Pack and Tom Lowery are all signed on for next season, while Joe Morrell and Colby Bishop are the Blues’ most prized assets going into the window.
Connor Ogilvie, Josh Oluwayemi and Harry Jewitt-White all had options triggered by the club at the end of the campaign, while Ronan Curtis and Jay Mingi remain in negotiations.
At least 9-10 new faces have been pencilled in to arrive through the doors at Fratton Park in the window in John Mousinho’s maiden summer in charge.
But how much work do Pompey need to do compared to their rivals?
We’ve taken a look at the current squad sizes of each League One club to discover how many players they have under contract following the release of their retained lists.
NOTE: Carlisle and Barnsley are yet to publish their retained list due to involvement in the play-off final.
17. Wycombe
Current squad size: 19; Players under contract: Max Stryjek, Jack Grimmer, Joe Jacobson, Chris Forino, Ryan Tafazolli, David Wheeler, Sam Vokes, Garath McCleary, Jack Young, Brandon Hanlan, D’Mani Mellor, Jason McCarthy, Josh Scowen, Tjay De Barr, Jasper Pattenden, Luca Woodhouse, Christie Ward, Antoine Makoli, Declan Skura. Photo: Mike Owen
18. Charlton
Current squad size: 19; Players under contract: Chuks Aneke, Corey Blackett-Taylor, Tyreece Campbell, George Dobson, Mandela Egbo, Scott Fraser, Daniel Kanu, Miles Leaburn, Ashley Maynard-Brewer, Zach Mitchell, Lucas Ness, Jack Payne, Joe Wollacott, Richard Chin, Deji Elerewe, Diallang Jaiyesimi, Charlie Kirk, Sam Lavelle, Conor McGrandles. Photo: Gareth Copley
19. Blackpool
Current squad size: 22; Players under contract: Dan Grimshaw, Marvin Ekpiteta, Oliver Casey, Doug Tharme, Jordan Gabriel, Andy Lyons, Dom Thompson, Reece James, Tom Trybull, Sonny Carey, Owen Dale, Jake Beesley, Jerry Yates, Callum Connolly, Kenny Dougall, CJ Hamilton, James Husband, Shayne Lavery, Luke Mariette, Will Squires, Tayt Trusty, Matty Virtue. Photo: Jason Brown
20. Lincoln
Current squad size: 22; Players under contract: Adam Jackson, Ben House, Charles Vernam, Charley Kendall, Danny Mandroiu, Dylan Duffy, Elicha Ahui, Ethan Erhahon, Freddie Draper, Hakeeb Adelakun, Jay Benn, Jovon Makama, Jordan Wright, Lasse Sorensen, Lewis Montsma, MJ Kamara, Morgan Worsfold-Gregg, Oisin Gallagher, Paudie O’Connor, Sam Long, Ted Bishop, TJ Eyoma. Photo: James Chance