Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 01.02.2026 | A. Nordin | FSV Mainz 05 | Rennes | Loan |
| 01.02.2026 | O. Ruoppi | FSV Mainz 05 | KuPS | Loan |
| 01.02.2026 | O. Ruoppi | KuPS | FSV Mainz 05 | Transfer |
| 01.02.2026 | S. Becker | Osasuna | FSV Mainz 05 | Loan |
| 31.01.2026 | O. Ruoppi | KuPS | FSV Mainz 05 | Transfer |
| 22.01.2026 | B. Bobzien | FSV Mainz 05 | — | Loan |
| 21.01.2026 | S. Posch | Como | FSV Mainz 05 | Loan |
| 20.01.2026 | L. Bierschenk | FSV Mainz 05 | — | Transfer |
| 13.01.2026 | Hong Hyun-Seok | FSV Mainz 05 | Gent | Loan |
| 13.01.2026 | K. Schopp | FSV Mainz 05 | TSV Hartberg | 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 |
| 24.10.2025 | J. Debrah | FSV Mainz 05 | — | Free agent |
| 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 |
| 12.08.2025 | Aiman Dardari | FSV Mainz 05 | FC Augsburg | - |
| 31.07.2025 | E. Shabani | FSV Mainz 05 | — | Free agent |
| 31.07.2025 | M. Richter | FSV Mainz 05 | SV Darmstadt 98 | Loan |
| 30.07.2025 | Hong Hyun-Seok | FSV Mainz 05 | Nantes | Loan |
| 30.07.2025 | M. Richter | FSV Mainz 05 | SV Darmstadt 98 | Loan |
| 29.07.2025 | Hong Hyun-Seok | FSV Mainz 05 | Nantes | Loan |
| 28.07.2025 | K. Mata | FSV Mainz 05 | — | Free agent |
| 13.07.2025 | E. Fernandes | FSV Mainz 05 | BSC Young Boys | Transfer |
| 12.07.2025 | E. Fernandes | FSV Mainz 05 | BSC Young Boys | Transfer |
| 09.07.2025 | S. Kawasaki | — | FSV Mainz 05 | Loan |
| 08.07.2025 | S. Kawasaki | — | FSV Mainz 05 | Loan |
| 08.07.2025 | Jesaja Mustapha | FSV Mainz 05 | NEC Nijmegen | Transfer |
| 05.07.2025 | T. Krauß | FSV Mainz 05 | 1. FC Köln | Loan |
| 04.07.2025 | T. Krauß | FSV Mainz 05 | 1. FC Köln | Loan |
| 04.07.2025 | J. Burkardt | FSV Mainz 05 | Eintracht Frankfurt | Transfer |
| 03.07.2025 | J. Burkardt | FSV Mainz 05 | Eintracht Frankfurt | Transfer |
| 02.07.2025 | J. Burkardt | FSV Mainz 05 | Eintracht Frankfurt | Transfer |
| 01.07.2025 | M. Richter | Hamburger SV | FSV Mainz 05 | N/A |
| 01.07.2025 | K. Schopp | — | FSV Mainz 05 | Free Transfer |
| 01.07.2025 | M. Jenz | FSV Mainz 05 | VfL Wolfsburg | Back from Loan |
| 01.07.2025 | B. Bobzien | — | FSV Mainz 05 | Back from Loan |
| 01.07.2025 | L. Ajorque | FSV Mainz 05 | Stade Brestois 29 | Transfer |
| 01.07.2025 | E. Fernandes | Stade Brestois 29 | FSV Mainz 05 | N/A |
| 01.07.2025 | N. Tauer | — | FSV Mainz 05 | Back from Loan |
| 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 | K. Bos | — | FSV Mainz 05 | Transfer |
| 30.06.2025 | B. Hollerbach | Union Berlin | FSV Mainz 05 | Transfer |
| 30.06.2025 | K. Bos | — | FSV Mainz 05 | Transfer |
| 30.06.2025 | L. Ajorque | FSV Mainz 05 | Stade Brestois 29 | Transfer |
| 30.06.2025 | K. Schopp | Sturm Graz | FSV Mainz 05 | Free agent |