1. Fußballclub Heidenheim 1846 (Bundesliga): every transfer in and out, fees paid and earned, squad market value, €25m spent and €44m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-01-30 | Eren Dinkçi | Freiburg | Heidenheim | Loan |
| 2026-01-20 | Kevin Müller | Heidenheim | FC Schalke 04 | Loan |
| 2026-01-15 | Leonidas Stergiou | Stuttgart | Heidenheim | Loan |
| 2026-01-12 | Christian Conteh | E. Braunschweig | Heidenheim | €1.5m |
| 2026-01-02 | Thomas Keller | Heidenheim | Dynamo Dresden | Loan |
| 2026-01-02 | Hennes Behrens | Hoffenheim | Heidenheim | Loan |
| 2025-09-01 | Maximilian Breunig | Heidenheim | 1.FC Magdeburg | Loan |
| 2025-09-01 | Léo Scienza | Heidenheim | Southampton | €9m |
| 2025-09-01 | Luka Janes | Heidenheim | Sonnenhof-Gr. | Loan |
| 2025-08-28 | Leart Paçarada | 1.FC Köln | Heidenheim | — |
| 2025-07-30 | Yannik Wagner | Heidenheim U19 | Heidenheim | — |
| 2025-07-28 | Diant Ramaj | Dortmund | Heidenheim | Loan |
| 2025-07-01 | Vitus Eicher | Heidenheim | Without Club | — |
| 2025-07-01 | Norman Theuerkauf | Heidenheim | Retired | — |
| 2025-07-01 | Nick Rothweiler | Heidenheim U19 | Heidenheim | — |
| 2025-07-01 | Christopher Negele | Heidenheim | Unterhaching | Free |
| 2025-07-01 | Arijon Ibrahimovic | Bayern Munich | Heidenheim | Loan |
| 2025-07-01 | Adam Kölle | Heidenheim U19 | Heidenheim | — |
| 2025-01-21 | Lennard Maloney | Heidenheim | Mainz | €500k |
| 2025-01-17 | Mikkel Kaufmann | Heidenheim | Karlsruher SC | Loan |