SC Telstar (Eredivisie): every transfer in and out, fees paid and earned, squad market value, €420k spent and €690k earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Guus Offerhaus | Telstar | Utrecht | Free |
| 2026-07-01 | Dylan Mertens | Telstar | Without Club | — |
| 2026-07-01 | Danny Bakker | Telstar | Without Club | — |
| 2026-07-01 | Adil Lechkar | Telstar | Without Club | — |
| 2026-02-03 | Nökkvi Thórisson | Sparta R. | Telstar | Loan |
| 2026-02-03 | Milan Zonneveld | Telstar | Sparta R. | — |
| 2026-02-03 | Jelani Seedorf | Sparta U21 | Telstar | €200k |
| 2026-02-03 | Gerald Alders | Ajax U21 | Telstar | Loan |
| 2026-01-26 | Sem van Duijn | AZ Alkmaar U21 | Telstar | Loan |
| 2026-01-05 | Cedric Hatenboer | RSC Anderlecht | Telstar | Loan |
| 2025-08-29 | Kay Tejan | USL Dunkerque | Telstar | — |
| 2025-08-18 | Jochem Ritmeester van de Kamp | Almere City | Telstar | Loan |
| 2025-08-08 | Rojendro Oudsten | SC Telstar U19 | Telstar | — |
| 2025-08-08 | Dylan Mertens | Fakel Voronezh | Telstar | Free |
| 2025-08-08 | Dion Malone | Karmiotissa | Telstar | Free |
| 2025-07-28 | Mees Kaandorp | SC Telstar | Wadi Degla | Free |
| 2025-07-14 | Daan Reiziger | SC Cambuur | Telstar | Free |
| 2025-07-04 | Neville Ogidi Nwankwo | Utrecht | Telstar | Loan |
| 2025-07-01 | Youssef El Kachati | Telstar | NEC Nijmegen | Free |
| 2025-07-01 | Yamano Olfers | Telstar U21 | Telstar | — |