LOSC Lille (Ligue 1): every transfer in and out, fees paid and earned, squad market value, €428m spent and €843m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Thomas Meunier | Lille | Without Club | — |
| 2026-02-19 | André Gomes | Lille | Columbus | Free |
| 2026-02-02 | Noah Edjouma | Toulouse | Lille | €5m |
| 2026-02-02 | Gaëtan Perrin | Krasnodar | Lille | €5m |
| 2026-01-14 | Ugo Raghouber | Lille | Levante | Loan |
| 2026-01-14 | Ignacio Miramón | Lille | Gimnasia | Loan |
| 2026-01-01 | Soriba Diaoune | LOSC Lille B | Lille | — |
| 2025-11-01 | Vincent Burlet | Lille | US Boulogne | Loan |
| 2025-09-01 | Vincent Burlet | Lille | Stade Reims | Loan |
| 2025-09-01 | Isaac Cossier | Lille | Le Mans FC | Loan |
| 2025-09-01 | Edon Zhegrova | Lille | Juventus | €16m |
| 2025-09-01 | Chancel Mbemba | Marseille | Lille | Free |
| 2025-09-01 | Calvin Verdonk | NEC Nijmegen | Lille | €3m |
| 2025-08-31 | Mohamed Bayo | Lille | Gaziantep FK | Loan |
| 2025-08-29 | Hamza Igamane | Rangers | Lille | €12m |
| 2025-08-14 | Berke Özer | Eyüpspor | Lille | €4.5m |
| 2025-08-13 | Bafodé Diakité | Lille | Bournemouth | €35m |
| 2025-08-09 | Lucas Chevalier | Lille | PSG | €40m |
| 2025-08-08 | Tiago Morais | Lille | Casa Pia | Loan |
| 2025-08-08 | Romain Perraud | Real Betis | Lille | €3m |