| Player | From | Fee | Date | |
|---|---|---|---|---|
 | Wesley Moraes | Levante | End of Loan | 30/06/2023 |
 | Morgan Sansom | Strasbourg | End of Loan | 30/06/2023 |
 | Youri Tielemans | Leicester | Free | 01/07/2023 |
 | Rico Richards | West Brom | Free | 03/07/2023 |
 | Pau Torres | Villarreal | €33,000,000 | 12/07/2023 |
| Moussa Diaby | Bayer Leverkusen | €55,000,000 | 22/07/2023 |
 | Nicolò Zaniolo | Galatasaray | Loan Fee €5,000,000 | 18/08/2023 |
| Clément Lenglet | Barcelona | Loan | 01/09/2023 |
 | Kosta Nedeljkovic | Red Star Belgrade | €7,600,000 | 22/01/2024 |
| Morgan Rogers | Middlesborough | €9,400,000 | 01/02/2024 |
 | Joe Gauci | Adelaide | €1,500,000 | 01/02/2024 |
| Lino Sousa | Arsenal | €7,600,000 | 22/01/2024 |
 | Filip Marschall | MK Dons | End of Loan | 31/05/2024 |
 | Viljami Sinisalo | Exeter City | End of Loan | 31/05/2024 |
| Lino Sousa | Plymouth | End of Loan | 31/05/2024 |
| Player | To | Fee | Date | |
|---|---|---|---|---|
| Arjhan Raikhy | Leicester | Free | 01/07/2023 |
| Kaine Kesler-Hayden | Plymouth | Loan | 01/07/2023 |
| Caleb Chukwuemeka | Released | 01/07/2023 | |
| Ashley Young | Everton | Free | 13/07/2023 |
| Viljami Sinisalo | Exeter City | Loan | 19/07/2023 |
| Marvelous Nakamba | Luton Town | €2,900,000 | 20/07/2023 |
| Morgan Sansom | Nice | Loan | 24/07/2023 |
| Wesley Moraes | Leicester | Not Disclosed | 28/07/2023 |
| Louie Barry | Stockport | Loan | 28/07/2023 |
| Finn Azaz | Plymouth | Loan | 02/08/2023 |
 | Lamare Bogarde | Bristol Rovers | Loan | 18/08/2023 |
| Aaron Ramsey | Burnley | €16,500,000 | 22/08/2023 |
| Ruben Shapoke | West Brom | Free | 24/08/2023 |
| Cameron Archer | Sheff. Utd | €21,600,000 | 27/08/2023 |
| Jaden Philogene | Hull City | €5,800,000 | 01/09/2023 |
| Keinan Davis | Udinese | €2,300,000 | 01/09/2023 |
| Chisom Afoka | Bradford | Loan | 01/09/2023 |
| Sebastian Revan | Rotherham | Loan | 01/09/2023 |
| Oliwier Zych | Puszcza Niepolomice | Loan | 04/09/2023 |
| Philippe Coutinho | Al Duhail | Loan | 08/09/2023 |
 | Kerr Smith | St. Johnstone | Loan | 02/01/2024 |
| Finn Azaz | Middlesborough | €2,900,000 | 05/01/2024 |
| Ben Chrisene | Blackburn | Loan | 05/01/2024 |
| Edward Rowe | Gloucester City | Loan | 12/01/2024 |
| Rico Richards | Stockport | Loan | 18/01/2024 |
| Filip Marschall | MK Dons | Loan | 19/01/2024 |
| Kosta Nedeljkovic | Red Star Belgrade | Loan | 23/01/2024 |
| Leander Dendoncker | Napoli | Loan | 26/01/2024 |
 | Bertrand Traoré | Villarreal | Free | 01/02/2024 |
| Josh Feeny | Real Union | Loan | 01/02/2024 |
| Tommi O'Reilly | Real Union | Loan | 01/02/2024 |
| Lino Sousa | Plymouth | Loan | 01/02/2024 |