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| Transfers |
3,500,000 < >  Kaiserslautern |
| GRK | > | Thomas BEELEN | CB | NED | 61 | 76 | 11/06/01 (23) | 86 | | | Kaiserslautern | | 9920 | | | | 0 | 0 | 2555 | 0 | +3 | |
| 2,000,000 < > Kaiserslautern |
| VUE | > | Jonathan GRADIT | CB | FRA | 64 | 87 | 24/11/92 (31) | 92 | 1.80 | 77 | Kaiserslautern | | 17080 | | | | 0 | 0 | 2215 | 0 | +3 | |
 Bodø/Glimt 5,000,000 < > Kaiserslautern |
| KRH | > | Albert GRØNBÆK Erlykke | CM/AM | DEN | 59 | 93 | 23/05/01 (23) | 85 | 1.76 | 63 | Kaiserslautern | | 8170 | | | | 0 | 0 | 2805 | 0 | +3 | |
 Real Madrid < > 2,100,000  Anderlecht |
| XPW | < | Lewis DUNK | CB | ENG | 65 | 94 | 21/11/91 (32) | 91 | 1.90 | 77 | Real Madrid | | 21600 | | | | 1 | 0 | 1990 | 0 | +2 | |
 Shakhtar 30,000,000 < > Lille |
| JYX | > | João Maria Lobo Alves PALHINHA Gonçalves | DM | POR | 66 | 94 | 09/07/95 (29) | 87 | 1.89 | 77 | Lille | | 28720 | | | | 3 | 0 | 3435 | 0 | +4 | |
| KFJ | < | Ruben LOFTUS-CHEEK | CM | ENG | 65 | 91 | 23/01/96 (28) | 89 | 1.93 | 72 | Shakhtar | 6.69 | 23500 | | | | 4 | 1 | 4690 | 3 | +1 | |
| JBG | < | Yoane WISSA | LW/St | COD | 64 | 93 | 03/09/96 (27) | 93 | 1.80 | 75 | Shakhtar | | 17780 | | | | 0 | 0 | 4330 | 0 | +1 | |
 AEK 10,000,000 < > Benfica |
| EEX | > | Vítor Machado Ferreira, VITINHA | CM/AM | POR | 66 | 98 | 13/02/00 (24) | 92 | 1.72 | 65 | Benfica | 7.11 | 25320 | | | | 6 | 0 | 6850 | 1 | +4 | |
| GPU | < | Giacomo RASPADORI | St | ITA | 64 | 95 | 18/02/00 (24) | 91 | 1.72 | 69 | AEK | 7.12 | 17080 | | | | 3 | 1 | 6000 | 18 | +1 | |
| Valencia Mestalla 3,500,000 < > Benfica |
| MDN | > | Yarek GASIOROWSKI Hernandis | CB | ESP | 55 | 81 | 12/01/05 (19) | 84 | | | Benfica | | 2150 | | | | 0 | 0 | 1570 | 0 | Y | |
| Southampton < > 1,940,000 Newcastle United |
| ASQ | < | Jamaal LASCELLES | CB | ENG | 62 | 12 | 11/11/93 (30) | 89 | 1.87 | 83 | Southampton | | | | | | | | 1785 | | | |
| Rotherham United < > 580,000 Newcastle United |
| WGR | < | Karl DARLOW | Gk | ENG | 55 | 15 | 08/10/90 (33) | 94 | 1.85 | 79 | Rotherham United | | | | | | | | 500 | | | |
 San Jose < >  Rangers |
| SSE | < | Nicolás Paz Martínez, NICO PAZ | AM | ARG | 52 | 96 | 08/09/04 (19) | 89 | 1.76 | 64 | Rangers | | 1380 | | | | 0 | 0 | 1490 | 0 | Y | (t.17, San Jose) |
| 1,650,000 < > Arsenal |
| XLZ | > | Enzo BARRENECHEA | DM/CM | ARG | 61 | 83 | 22/05/01 (23) | 96 | 1.86 | 81 | Arsenal | | 10520 | | | | 0 | 0 | 2555 | 0 | +4 | |
| 1,740,000 < > Karlsruher SC |
| MRE | > | Noah SADIKI | CB | BEL | 59 | 78 | 17/12/04 (19) | 89 | | | Karlsruher SC | | 7400 | | | | 0 | 0 | 2795 | 0 | +1 | |
1,330,000 < >  CSKA |
| XGW | > | Aleksandr SILYANOV | FB | RUS | 60 | 90 | 17/02/01 (23) | 91 | 1.85 | 81 | CSKA | | 8480 | | | | 0 | 0 | 2210 | 0 | +1 | |
| Released |
| SXR | 25+ | Mikel BALENZIAGA Oruesagasti | LB | ESP | 50 | 2 | 29/02/88 (36) | 85 | 1.78 | 70 | Sporting Covilhã | | | | | | | | F/t | | | |
| XQD | 25+ | Filip NOVÁK | LB/LM | CZE | 57/58 | 10 | 26/06/90 (34) | 78 | 1.84 | 79 | Baník Most-Sous | | | | | | | | 235 | | | |
| BAW | 25+ | Alexander ESSWEIN | W/WS | GER | 53 | 10 | 25/03/90 (34) | 92 | 1.81 | 76 | Barnsley | | | | | | | | 120 | | | |
| QRU | <20 | Andy LONERGAN | Gk | ENG | 50 | 2 | 19/10/83 (40) | 87 | 1.87 | 87 | (retired) | | | | | | | | F/t | | | |
| Loan callbacks |
| MTV | - | Arijon IBRAHIMOVIC | CM | GER | 50/55 | 98 | 11/12/05 (18) | 70 | | | SC Heerenveen | | 640 | | | | 0 | 0 | 2500 | 0 | Y | |
| SIM | - | Mahamadou DIAWARA | CM | FRA | 45/51 | 94 | 17/02/05 (19) | 68 | | | Rangers | | 270 | | | | 0 | 0 | 1285 | 0 | Y | |
| EDK | - | Myron VAN BREDERODE | St | NED | 61 | 99 | 06/07/03 (21) | 92 | | | SC Heerenveen | 6.91 | 7540 | | | | 0 | 0 | 5375 | 1 | | |
