ADO Den Haag (Eredivisie): every transfer in and out, fees paid and earned, squad market value, €1.3m spent and €13m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-08-12 | Othniël Raterink | Cagliari Calcio | ADO Den Haag | Loan |
| 2026-08-01 | Diogo Tomas | ADO Den Haag | AIK | Free |
| 2026-07-21 | Yannick Eduardo | TSG 1899 Hoffenheim | ADO Den Haag | Loan |
| 2026-07-17 | Antoine Lejoly | ADO Den Haag | KAS Eupen | Free |
| 2026-07-15 | Donát Bárány | Debrecen | ADO Den Haag | Free |
| 2026-07-15 | Niclas Thiede | VfL Bochum | ADO Den Haag | Free |
| 2026-07-14 | Lasse Wilhelm | Saarbrücken | ADO Den Haag | Free |
| 2026-07-14 | Jan Zamburek | Heracles Almelo | ADO Den Haag | Free |
| 2026-07-08 | Jari Vlak | ADO Den Haag | Castellón | €600k |
| 2026-07-01 | Steven van der Sloot | ADO Den Haag | Fortuna Düsseldorf | Free |
| 2026-07-01 | Taneli Hämäläinen | ADO Den Haag | KuPS | Free |
| 2026-02-03 | Pascal Mulder | FC Emmen | ADO Den Haag | Free |
| 2026-02-03 | Jalen Hawkins | FC Emmen | ADO Den Haag | Free |
| 2026-01-23 | Bryan Fiabema | Lech Poznan | ADO Den Haag | Loan |
| 2025-09-02 | Mees Kreekels | Vitesse FC | ADO Den Haag | Free |
| 2025-08-22 | Antoine Lejoly | RFC Liège | ADO Den Haag | Free |
| 2025-08-16 | Taneli Hämäläinen | ADO Den Haag | KuPS | Loan |
| 2025-08-11 | Tim Coremans | ADO Den Haag | FC Dordrecht | Free |
| 2025-08-08 | Nigel Thomas | Viborg FF | ADO Den Haag | — |
| 2025-08-07 | Mylian Jiménez | Aalborg BK | ADO Den Haag | — |