Bayer 04 Leverkusen (Bundesliga): every transfer in and out, fees paid and earned, squad market value, €797m spent and €766m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Piero Hincapié | Leverkusen | Arsenal | €52m |
| 2026-07-01 | Matej Kovar | Leverkusen | PSV | €5m |
| 2026-07-01 | Kerim Alajbegovic | Salzburg | Leverkusen | €8m |
| 2026-07-01 | Aleksa Damjanovic | Red Star | Leverkusen | €5m |
| 2026-02-02 | Jeanuël Belocian | Leverkusen | Wolfsburg | Loan |
| 2026-01-30 | Artem Stepanov | Leverkusen | Utrecht | Loan |
| 2026-01-29 | Montrell Culbreath | Leverkusen U19 | Leverkusen | — |
| 2026-01-27 | Jonas Omlin | Mönchengladbach | Leverkusen | Loan |
| 2026-01-20 | Alejo Sarco | Leverkusen | Mönchengladbach | Loan |
| 2026-01-01 | Issa Traoré | Djoliba AC | Leverkusen | €200k |
| 2025-09-01 | Victor Boniface | Leverkusen | Werder Bremen | Loan |
| 2025-09-01 | Piero Hincapié | Leverkusen | Arsenal | Loan |
| 2025-09-01 | Gustavo Puerta | Leverkusen | Racing | €3.5m |
| 2025-09-01 | Farid Alfa-Ruprecht | Leverkusen | VfL Bochum | Loan |
| 2025-09-01 | Equi Fernández | Al-Qadsiah | Leverkusen | €25m |
| 2025-08-31 | Eliesse Ben Seghir | Monaco | Leverkusen | €32m |
| 2025-08-26 | Lucas Vázquez | Real Madrid | Leverkusen | Free |
| 2025-08-21 | Loïc Badé | Sevilla FC | Leverkusen | €25m |
| 2025-08-21 | Claudio Echeverri | Man City | Leverkusen | Loan |
| 2025-08-21 | Amine Adli | Leverkusen | Bournemouth | €21m |