US Boulogne: every transfer in and out, fees paid and earned, squad market value and €3.9m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-08-20 | Christian Kitenge | US Boulogne | Progrès Niedercorn | Free |
| 2026-08-04 | Zanga Koné | US Boulogne | Canet Roussillon | Free |
| 2026-07-21 | Corentin Fatou | US Boulogne | Laval | Free |
| 2026-07-20 | Amine El Farissi | US Boulogne | MAS Fès | Free |
| 2026-07-20 | Exaucé Mpembele Boula | US Boulogne | Bourg-en-Bresse | Loan |
| 2026-07-15 | Lilian Raillot | US Boulogne | Orléans | Free |
| 2026-07-09 | Abdel Hbouch | FC Annecy | US Boulogne | Free |
| 2026-07-08 | Amine El Farissi | US Boulogne | MAS Fès | Free |
| 2026-07-04 | Souleymane Keita | US Boulogne | USL Dunkerque | Free |
| 2026-07-02 | Luka Boiteau | US Boulogne | Valenciennes FC | Free |
| 2026-07-01 | Benjamin Besic | Bourg-en-Bresse | US Boulogne | Free |
| 2026-07-01 | Théo Brusco | Differdange 03 | US Boulogne | Free |
| 2026-07-01 | Emmanuel Kouassi | US Boulogne | Le Puy-en-Velay | Free |
| 2026-07-01 | Nathan Zohoré | US Boulogne | Ferencvárosi | Free |
| 2026-07-01 | Siad Gourville | US Boulogne | RAAL La Louvière | Free |
| 2026-07-01 | Hervé Touré | US Boulogne | OFK Beograd | Free |
| 2026-02-14 | Hervé Touré | US Boulogne | Javor-Matis | Loan |
| 2026-02-01 | Zoran Christophe Moco | Dijon FCO | US Boulogne | Free |
| 2026-01-29 | Lilian Raillot | US Boulogne | Paris 13 Atletico | Loan |
| 2026-01-26 | Exaucé Mpembele Boula | US Boulogne | Paris 13 Atletico | Loan |