FSV Mainz 05 II (): setiap transfer masuk dan keluar, nilai yang dibayar dan diterima, serta nilai pasar skuad.
| Tanggal | Pemain | Dari | Ke | Nilai |
|---|---|---|---|---|
| 2026-01-01 | Kacper Potulski | FSV Mainz 05 II | Mainz | — |
| 2025-08-01 | Eniss Shabani | FSV Mainz 05 II | NK Vukovar 1991 | Gratis |
| 2025-07-01 | Jayson Videira | Hannover 96 II | FSV Mainz 05 II | Gratis |
| 2025-07-01 | Kacper Potulski | Mainz 05 U19 | FSV Mainz 05 II | — |
| 2025-07-01 | Daniel Gleiber | FSV Mainz 05 II | Mainz | — |
| 2025-07-01 | Maxim Dal | FSV Mainz 05 II | Mainz | — |
| 2024-07-01 | Daniel Gleiber | Mainz 05 U19 | FSV Mainz 05 II | — |
| 2024-07-01 | Luke Gauer | E. Frankfurt II | FSV Mainz 05 II | Gratis |
| 2024-07-01 | Maxim Dal | Mainz 05 U19 | FSV Mainz 05 II | — |
| 2024-07-01 | Lasse Wilhelm | FSV Mainz 05 II | Saarbrücken | Gratis |
| 2023-07-27 | Alessio Curci | FSV Mainz 05 II | Francs Borains | Gratis |
| 2023-07-01 | Marcus Müller | FC Augsburg II | FSV Mainz 05 II | Gratis |
| 2023-07-01 | Tim Müller | Mainz 05 U19 | FSV Mainz 05 II | — |
| 2022-08-25 | Jakob Tranziska | FSV Mainz 05 II | Admira Wacker | — |
| 2022-07-01 | David Mamutovic | Rot Weiss Ahlen | FSV Mainz 05 II | Gratis |
| 2022-07-01 | Lasse Wilhelm | Mainz 05 U19 | FSV Mainz 05 II | — |
| 2022-07-01 | Eniss Shabani | FSV Mainz 05 II | Mainz | Pinjaman |
| 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 | — |