Castellon II (Segunda Division RFEF: Group 3): every transfer in and out, fees paid and earned, squad market value, €50k spent.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-08-10 | Player | Navalcarnero | Castellon II | €50k |
| 2026-08-02 | Player | RZ Deportivo Aragón | Castellon II | Free |
| 2026-07-28 | Player | Castellon II | Atlético Baleares | Free |
| 2026-07-23 | Player | Castellon II | Conquense | Free |
| 2026-07-22 | Nacho Vizcaíno | Cadiz II | Castellon II | Free |
| 2026-07-19 | Guillem Trilla | Tenerife II | Castellon II | Free |
| 2026-07-19 | Charbel Anthuan Wehbe Gonzalez | Castellon II | Recreativo Huelva | Free |
| 2026-07-07 | Sergi Torner | Castellon II | Castellón | Free |
| 2026-07-01 | David Sellés | Castellon II | Ústí nad Labem | Free |
| 2026-07-01 | Carlos Segura | Castellon II | Castellón | Free |
| 2026-07-01 | Pere Marco | Castellon II | Gimnàstic | Free |
| 2026-01-31 | Player | Alcoyano | Castellon II | Free |
| 2026-01-16 | Ismael Fadel | Yeclano | Castellon II | Free |
| 2025-08-20 | Santi Borikó | Castellon II | Arenas de Getxo | Loan |
| 2025-07-30 | Player | Olot | Castellon II | Free |
| 2025-07-25 | Pere Marco | Castellon II | Unionistas de Salamanca | Loan |
| 2025-07-23 | Charbel Anthuan Wehbe Gonzalez | Llanera | Castellon II | Free |
| 2025-07-15 | Mauro Costa | Castellon II | Tenerife II | Free |
| 2025-07-03 | Player | Real Madrid III | Castellon II | Free |
| 2025-07-01 | Iker Punzano | Castellon II | Villarreal CF | Free |