FSV Mainz 05 II: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-01-01 | Kacper Potulski | FSV Mainz 05 II | Mainz | — |
| 2025-08-01 | Eniss Shabani | FSV Mainz 05 II | NK Vukovar 1991 | Free |
| 2025-07-01 | Maxim Dal | FSV Mainz 05 II | Mainz | — |
| 2025-07-01 | Kacper Potulski | Mainz 05 U19 | FSV Mainz 05 II | — |
| 2025-07-01 | Jayson Videira | Hannover 96 II | FSV Mainz 05 II | Free |
| 2025-07-01 | Daniel Gleiber | FSV Mainz 05 II | Mainz | — |
| 2024-07-01 | Maxim Dal | Mainz 05 U19 | FSV Mainz 05 II | — |
| 2024-07-01 | Luke Gauer | E. Frankfurt II | FSV Mainz 05 II | Free |
| 2024-07-01 | Lasse Wilhelm | FSV Mainz 05 II | Saarbrücken | Free |
| 2024-07-01 | Daniel Gleiber | Mainz 05 U19 | FSV Mainz 05 II | — |
| 2023-07-27 | Alessio Curci | FSV Mainz 05 II | Francs Borains | Free |
| 2023-07-01 | Tim Müller | Mainz 05 U19 | FSV Mainz 05 II | — |
| 2023-07-01 | Marcus Müller | FC Augsburg II | FSV Mainz 05 II | Free |
| 2022-08-25 | Jakob Tranziska | FSV Mainz 05 II | Admira Wacker | — |
| 2022-07-01 | Lasse Wilhelm | Mainz 05 U19 | FSV Mainz 05 II | — |
| 2022-07-01 | Eniss Shabani | FSV Mainz 05 II | Mainz | Loan |
| 2022-07-01 | David Mamutovic | Rot Weiss Ahlen | FSV Mainz 05 II | Free |
| 2022-02-10 | Eniss Shabani | Mainz 05 U19 | FSV Mainz 05 II | — |
| 2022-01-20 | Jakob Tranziska | Eintr. Bamberg | FSV Mainz 05 II | — |
| 2021-07-05 | Florian Bohnert | FSV Mainz 05 II | Pr. Niederkorn | — |