1. FSV Mainz 05
Zugänge
| ab | Name | Pos | Mannschaft | Team | ||
|---|---|---|---|---|---|---|
| 02/2026 |  | Sheraldo Becker | ST |  | CA Osasuna | Osasuna |
| 01/2026 |  | Stefan Posch | AB |  | Como 1907 | Como 1907 |
| 01/2026 |  | Silas Katompa Mvumpa | ST |  | Roter Stern Belgrad | Roter Stern |
| 01/2026 |  | Phillip Tietz | ST |  | FC Augsburg | Augsburg |
| 12/2025 | | Louis Babatz | TW |  | 1. FSV Mainz 05 II | Mainz 05 II |
| 12/2025 |  | Urs Fischer | TR | |||
| 12/2025 | | Markus Hoffmann | CO-TR | |||
| 12/2025 | | Sebastian Podsiadly | SP-AN | |||
| 12/2025 | | Benjamin Hoffmann | TR | | 1. FSV Mainz 05 II | Mainz 05 II |
| 11/2025 | | Fabio Moreno Fell | ST | | 1. FSV Mainz 05 II | Mainz 05 II |
| 10/2025 | | Jeremiah Debrah | MF |  | 1. FSV Mainz 05 U19 | Mainz 05 U19 |
| 09/2025 |  | William Bøving | ST |  | Sturm Graz | Sturm Graz |
| 08/2025 |  | Kacper Potulski | AB | | 1. FSV Mainz 05 II | Mainz 05 II |
| 07/2025 |  | Sota Kawasaki | MF |  | Kyoto Sanga FC | Kyoto |
| 07/2025 |  | Kasey Bos | AB |  | Melbourne Victory | Melb. Victory |
| 07/2025 | | Konstantin Schopp | AB | | Sturm Graz | Sturm Graz |
| 07/2025 | | Marco Richter | MF |  | Hamburger SV | Hamburg |
| 07/2025 | | Niklas Tauer | MF |  | Eintracht Braunschweig | Braunschweig |
| 07/2025 | | Ben Bobzien | ST |  | SK Austria Klagenfurt | A. Klagenfurt |
| 07/2025 | | Benedict Hollerbach | ST |  | 1. FC Union Berlin | Union Berlin |
Abgänge
| ab | Name | Pos | Mannschaft | Team | ||
|---|---|---|---|---|---|---|
| 02/2026 |  | Arnaud Nordin | ST |  | Stade Rennais | Rennes |
| 01/2026 | | Ben Bobzien | ST |  | Dynamo Dresden | Dresden |
| 01/2026 | | Konstantin Schopp | AB |  | TSV Hartberg | TSV Hartberg |
| 12/2025 | | Benjamin Hoffmann | TR | | 1. FSV Mainz 05 II | Mainz 05 II |
| 07/2025 | | Marco Richter | MF |  | SV Darmstadt 98 | Darmstadt |
| 07/2025 |  | Hyun-seok Hong | MF |  | FC Nantes | FC Nantes |
| 07/2025 | | Jonathan Burkardt | ST |  | Eintracht Frankfurt | E. Frankfurt |
| 07/2025 | | Moritz Jenz | AB |  | VfL Wolfsburg | Wolfsburg |
