Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 01.02.2026 | S. Becker | Osasuna | FSV Mainz 05 | Loan |
| 01.02.2026 | O. Ruoppi | KuPS | FSV Mainz 05 | Transfer |
| 31.01.2026 | O. Ruoppi | KuPS | FSV Mainz 05 | Transfer |
| 21.01.2026 | S. Posch | Como | FSV Mainz 05 | Loan |
| 12.01.2026 | Hong Hyun-Seok | Nantes | FSV Mainz 05 | Return from loan |
| 05.01.2026 | S. Katompa Mvumpa | VfB Stuttgart | FSV Mainz 05 | Transfer |
| 04.01.2026 | S. Katompa Mvumpa | VfB Stuttgart | FSV Mainz 05 | Transfer |
| 01.01.2026 | P. Tietz | FC Augsburg | FSV Mainz 05 | Transfer |
| 31.12.2025 | P. Tietz | FC Augsburg | FSV Mainz 05 | Transfer |
| 01.09.2025 | W. Bøving | Sturm Graz | FSV Mainz 05 | Transfer |
| 31.08.2025 | W. Bøving | Sturm Graz | FSV Mainz 05 | Transfer |
| 30.08.2025 | W. Bøving | Sturm Graz | FSV Mainz 05 | Transfer |
| 09.07.2025 | S. Kawasaki | — | FSV Mainz 05 | Loan |
| 08.07.2025 | S. Kawasaki | — | FSV Mainz 05 | Loan |
| 01.07.2025 | K. Bos | — | FSV Mainz 05 | Transfer |
| 01.07.2025 | E. Fernandes | Stade Brestois 29 | FSV Mainz 05 | N/A |
| 01.07.2025 | K. Schopp | — | FSV Mainz 05 | Free Transfer |
| 01.07.2025 | T. Krauß | Luton | FSV Mainz 05 | Back from Loan |
| 01.07.2025 | L. Ajorque | Stade Brestois 29 | FSV Mainz 05 | N/A |
| 01.07.2025 | B. Bobzien | — | FSV Mainz 05 | Back from Loan |
| 01.07.2025 | N. Tauer | — | FSV Mainz 05 | Back from Loan |
| 01.07.2025 | M. Richter | Hamburger SV | FSV Mainz 05 | N/A |
| 30.06.2025 | K. Bos | — | FSV Mainz 05 | Transfer |
| 30.06.2025 | F. Moreno Fell | — | FSV Mainz 05 | Transfer |
| 30.06.2025 | K. Schopp | Sturm Graz | FSV Mainz 05 | Free agent |
| 30.06.2025 | B. Hollerbach | Union Berlin | FSV Mainz 05 | Transfer |
| 29.06.2025 | K. Bos | — | FSV Mainz 05 | Transfer |
| 29.06.2025 | K. Schopp | Sturm Graz | FSV Mainz 05 | Free agent |
| 29.06.2025 | B. Hollerbach | Union Berlin | FSV Mainz 05 | Transfer |
| 29.06.2025 | P. Schulz | — | FSV Mainz 05 | Return from loan |
| 29.06.2025 | E. Fernandes | Stade Brestois 29 | FSV Mainz 05 | Return from loan |
| 29.06.2025 | T. Krauß | VfL Bochum | FSV Mainz 05 | Return from loan |
| 29.06.2025 | L. Ajorque | Stade Brestois 29 | FSV Mainz 05 | Return from loan |
| 29.06.2025 | B. Bobzien | — | FSV Mainz 05 | Return from loan |
| 29.06.2025 | N. Tauer | — | FSV Mainz 05 | Return from loan |
| 29.06.2025 | M. Richter | Hamburger SV | FSV Mainz 05 | Return from loan |
| 01.06.2025 | B. Hollerbach | Union Berlin | FSV Mainz 05 | Transfer |
| 28.01.2025 | A. Nordin | Montpellier | FSV Mainz 05 | Transfer |
| 28.01.2025 | T. Krauß | Luton | FSV Mainz 05 | Return from loan |
| 21.01.2025 | L. Maloney | 1. FC Heidenheim | FSV Mainz 05 | Transfer |
| 19.01.2025 | L. Maloney | 1. FC Heidenheim | FSV Mainz 05 | Transfer |
| 30.08.2024 | G. Vidović | Bayern München | FSV Mainz 05 | Loan |
| 29.08.2024 | Hong Hyun-Seok | Gent | FSV Mainz 05 | € 4M |
| 28.08.2024 | M. Jenz | VfL Wolfsburg | FSV Mainz 05 | Loan |
| 03.07.2024 | K. Sano | — | FSV Mainz 05 | N/A |
| 02.07.2024 | A. Sieb | Bayern München | FSV Mainz 05 | Loan |
| 01.07.2024 | L. Laux | — | FSV Mainz 05 | N/A |
| 01.07.2024 | A. Barkok | Hertha BSC | FSV Mainz 05 | N/A |
| 01.07.2024 | P. Nebel | — | FSV Mainz 05 | N/A |
| 01.07.2024 | N. Veratschnig | Wolfsberger AC | FSV Mainz 05 | N/A |