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| Transfers |
 Juventus 6,000,000 < >  Blackburn Rovers |
| MXP | > | Wilfried Stephane SINGO | RB/CB | CIV | 65 | 97 | 25/12/00 (24) | 90 | 1.90 | 79 | Blackburn Rovers | 6.94 | 23000 | | | | 3 | 0 | 4025 | 1 | +2 | |
 Bor. Dortmund II 4,500,000 < > Blackburn Rovers |
| MLM | > | Pharrell 'Nnamdi' COLLINS | CB | GER | 61 | 77 | 10/01/04 (21) | 85 | 1.91 | 81 | Blackburn Rovers | | 10320 | | | | 0 | 0 | 3130 | 0 | +2 | |
| Portsmouth < > 970,000 FC Schalke 04 |
| QTT | < | Jonjoe KENNY | RB/CB | ENG | 59 | 11 | 15/03/97 (28) | 89 | 1.76 | 67 | Portsmouth | | | | | | | | 1315 | | | |
| 2,450,000 < > FC Schalke 04 |
| NCW | > | Reo HATATE | CM/LM | JPN | 63 | 84 | 21/11/97 (27) | 93 | 1.71 | 70 | FC Schalke 04 | | 15140 | | | | 0 | 0 | 3745 | 1 | +3 | |
| 2,000,000 < > FC Schalke 04 |
| LFI | > | YANG Hyun-jun | AM/W | KOR | 60 | 89 | 25/05/02 (23) | 92 | 1.79 | 69 | FC Schalke 04 | | 7780 | | | | 0 | 0 | 3245 | 1 | +4 | |
 Deportivo 18,000,000 < > Real Betis |
| VFV | > | Alejandro GARNACHO | W | ARG | 64 | 95 | 01/07/04 (21) | 80 | 1.80 | 80 | Real Betis | | 17780 | | | | 0 | 0 | 7090 | 0 | +4 | |
 Lille 10,000,000 < >  Feyenoord |
| ITE | > | Nathan DE CAT | CM | BEL | 51 | 94 | 19/07/08 (17) | 86 | | | Feyenoord | | 1170 | | | | 0 | 0 | 1515 | 0 | Y | |
| 400,000 < > Feyenoord |
| WMU | > | Reggie WALSH | CM/DM | ENG | 36 | 97 | 20/10/08 (16) | 88 | | | Feyenoord | | 120 | | | | 0 | 0 | 160 | 0 | Y | |
 Ponte Preta < > 1,290,000 Lazio |
| GAH | < | KAYKY da Silva Chagas | W | BRA | 53/54 | 2 | 11/06/03 (22) | 79 | 1.75 | 67 | Ponte Preta | | | | | | | | 1500 | | | |
| São Bento < > Arsenal |
| BOY | < | PEDRO Henrique Silva dos Santos | LW | BRA | 57/61 | 93 | 05/02/06 (19) | 73 | 1.71 | 65 | Arsenal | | 3950 | | | | 0 | 0 | 5480 | 0 | Y | (t.5, São Bento) |
| Hertha BSC Berlin 4,800,000 < > 1.FC Union Berlin |
| NCG | > | Maximilian MITTELSTÄDT | LB | GER | 65 | 99 | 18/03/97 (28) | 93 | 1.78 | 69 | 1.FC Union Berlin | 7.10 | 19000 | | | | 2 | 1 | 3185 | 5 | +2 | |
| SV Werder Bremen 32,500,000 < > 1.FC Union Berlin |
| LRG | > | Nick WOLTEMADE | CS | GER | 62 | 68 | 14/02/02 (23) | 93 | 1.96 | 76 | 1.FC Union Berlin | | 12060 | | | | 0 | 0 | 5060 | 0 | +2 | |
| B.Mönchengladbach 8,000,000 < > 1.FC Union Berlin |
| ERI | > | Rocco REITZ | CM | GER | 63 | 96 | 29/05/02 (23) | 91 | 1.76 | 72 | 1.FC Union Berlin | | 14940 | | | | 0 | 0 | 5015 | 0 | +2 | |
| AJV | < | Tim SKARKE | RW | GER | 58 | 12 | 07/09/96 (29) | 95 | 1.79 | 70 | B.Mönchengladbach | | | | | | | | 1550 | | | |
| IGE | < | László BÉNES | CM | SVK | 58 | 13 | 09/09/97 (28) | 91 | 1.81 | 73 | B.Mönchengladbach | | | | | | | | 1670 | | | |
Nantes < >  IFK Göteborg |
| HVB | < | Soungoutou MAGASSA | DM/CB | FRA | 60/62 | 97 | 08/10/03 (21) | 76 | 1.88 | 80 | IFK Göteborg | | 11160 | | | | 0 | 0 | 3610 | 0 | +3 | (t.42, Nantes) |
| Metz 12,000,000 < > Real Betis |
| DXI | > | Lamine CAMARA | CM | SEN | 63 | 77 | 05/01/04 (21) | 90 | 1.73 | 65 | Real Betis | | 14840 | | | | 0 | 0 | 6145 | 0 | +4 | |
| VEA | < | LUIZ HENRIQUE André Rosa da Silva | RW | BRA | 62 | 14 | 02/01/01 (24) | 90 | | | Metz | | | 3 | | | | | 3855 | | | |
| Las Palmas 9,000,000 < > Real Betis |
| NGP | > | ASSANE DIAO Diaoune | W | SEN | 62 | 70 | 07/09/05 (20) | 83 | 1.85 | 80 | Real Betis | | 5830 | | | | 0 | 0 | 5825 | 0 | Y | |
 Colorado Rapids < > Club Brugge |
| BDM | < | Giovanni REYNA | AM/W | USA | 62 | 96 | 13/11/02 (22) | 87 | 1.85 | 79 | Club Brugge | 7.00 | 12560 | | | | 0 | 1 | 4830 | 7 | +1 | (t.36, Colorado Rapids) |
| Fluminense < > Club Brugge |
| MKG | < | Igor THIAGO Nascimento Rodrigues | CS | BRA | 61 | 95 | 26/06/01 (24) | 91 | 1.88 | 85 | Club Brugge | 6.58 | 10220 | | | | 3 | 0 | 3880 | 3 | +1 | (t.42, Fluminense) |
 Javor < > Club Brugge |
| WKG | < | Kosta NEDELJKOVIC | RB | SRB | 57/58 | 96 | 16/12/05 (19) | 78 | 1.84 | 72 | Club Brugge | | 2140 | | | | 2 | 0 | 2420 | 0 | Y | (t.42, Javor) |
| Southampton < > 1,620,000 Newcastle United |
| TLB | < | Dan BURN | CB | ENG | 66 | 1 | 09/05/92 (33) | 94 | 1.98 | 82 | Southampton | | | 1 | | | | | 1655 | | | |
 Famalicão < > Newcastle United |
| HVW | < | Tygo LAND | CM | NED | 52 | 97 | 11/01/06 (19) | 85 | 1.68 | 56 | Newcastle United | | 1270 | | | | 0 | 0 | 1490 | 0 | Y | (t.36, Famalicão) |
| Monaco < > Newcastle United |
| KZZ | < | Mouhamadou 'Habib' DIARRA | CM/AM | SEN | 64 | 42 | 03/01/04 (21) | 94 | 1.79 | 74 | Newcastle United | | 14240 | 6 | | | 0 | 0 | 7090 | 0 | +2 | (t.42, Monaco) |
 Vukovar '91 < > SC Heerenveen |
| AAQ | < | ROGER Fernandes | W | POR | 62 | 94 | 21/11/05 (19) | 82 | 1.70 | 63 | SC Heerenveen | 6.64 | 5340 | | | | 1 | 1 | 6325 | 3 | Y | (t.17, Vukovar '91) |
 Wanderers 5,000,000 < > Lyon |
| HON | > | Maximiliano Javier ARAÚJO Vilches | LWB/LW | URU | 64 | 96 | 15/02/00 (25) | 87 | 1.79 | 73 | Lyon | | 17380 | | | | 0 | 0 | 3305 | 2 | +4 | |
| Racing Genk 8,000,000 < > Lyon |
| DQD | > | Bilal EL KHANNOUS | AM | MAR | 62 | 81 | 10/05/04 (21) | 90 | 1.77 | 66 | Lyon | | 13860 | | | | 0 | 0 | 5325 | 0 | +4 | |
| Fulham 3,500,000 < > Lille |
| YNR | > | Josh KING | CM | ENG | 52 | 71 | 03/01/07 (18) | 90 | | | Lille | | 1490 | | | | 0 | 0 | 1620 | 0 | Y | |
| Racing Genk 2,500,000 < > Benfica |
| NKK | > | Mike PENDERS | Gk | BEL | 51 | 97 | 31/07/05 (20) | 90 | 2.00 | 95 | Benfica | | 1190 | | | | 0 | 0 | 865 | 0 | Y | |
 Tijuana 1,500,000 < > Benfica |
| EPN | > | Gilberto Rafael MORA Zambrano | AM | MEX | 53 | 84 | 14/10/08 (16) | 92 | 1.68 | 62 | Benfica | | 1560 | | | | 0 | 0 | 2170 | 0 | Y | |
| BNH | < | YAN Bueno COUTO | RWB/RM | BRA | 63 | 13 | 03/06/02 (23) | 88 | 1.68 | 60 | Tijuana | | | | | | | | 3405 | | | |
3,000,000 < >  Fenerbahçe |
| MRE | > | Noah SADIKI | CB | COD | 62 | 96 | 17/12/04 (20) | 89 | 1.83 | 74 | Fenerbahçe | | 10860 | | | | 0 | 0 | 3945 | 0 | | |
| 700,000 < > Fenerbahçe |
| CGJ | > | Daniel ELFADLI | CB/DM | LBY | 58 | 86 | 06/04/97 (28) | 86 | 1.88 | 78 | Fenerbahçe | | 6320 | | | | 0 | 0 | 1130 | 0 | | |
| 1,100,000 < > Fenerbahçe |
| KZL | > | Chidozie Collins AWAZIEM | CB/DM | NGA | 61 | 88 | 01/01/97 (28) | 91 | 1.86 | 76 | Fenerbahçe | | 10320 | | | | 0 | 0 | 1780 | 0 | | |
| 2,500,000 < > FC Porto |
| PZR | < | Deniz GÜL | CS | TUR | 58 | 83 | 02/07/04 (21) | 93 | 1.90 | 82 | FC Porto | | 6410 | | | | 0 | 0 | 3475 | 0 | | |
| 1,400,000 < > Wolves |
| DSC | > | George EARTHY | AM/W | ENG | 56 | 85 | 05/09/04 (21) | 91 | | | Wolves | | 4670 | | | | 0 | 0 | 2230 | 0 | | |
| AFC Wimbledon 2,400,000 < > Wolves |
| PME | > | Jack RUDONI | CM | ENG | 57 | 90 | 26/05/00 (25) | 94 | 1.85 | 77 | Wolves | | 5340 | | | | 0 | 0 | 1740 | 0 | | |
| Released |
| JJT | 16 | Murray JOHNSON | Gk | SCO | 41 | 7 | 13/11/04 (20) | 85 | | | Hibernian | | | | | | | | 160 | | | |
| Loan callbacks |
| EDK | - | Myron VAN BREDERODE | LW | NED | 59 | 97 | 06/07/03 (22) | 88 | | | SC Heerenveen | 6.65 | 11220 | | | | 5 | 0 | 3130 | 3 | +2 | |
