Bayer 04 Leverkusen (Bundesliga): every transfer in and out, fees paid and earned, squad market value, €890m spent and €841m earned. Tracked squad: ACTUAL Value €372m, in line with the market. Valued as of 2026-08-26.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-08-20 | Farid Alfa-Ruprecht | Bayer 04 Leverkusen | Hertha BSC | Loan |
| 2026-08-11 | Facundo Medina | Olympique Marseille | Bayer 04 Leverkusen | €23m |
| 2026-08-08 | Noah Mbamba | Bayer 04 Leverkusen | FC Lorient | Loan |
| 2026-08-05 | Miguel Gutiérrez | SSC Napoli | Bayer 04 Leverkusen | €26m |
| 2026-08-03 | Abdoulaye Faye | Bayer 04 Leverkusen | Celta de Vigo | Loan |
| 2026-08-02 | Kerim Alajbegovic | Bayer 04 Leverkusen | Juventus FC | €32m |
| 2026-07-27 | Luca Erlein | Bayer 04 Leverkusen | Energie Cottbus | Loan |
| 2026-07-25 | Luca Erlein | TSG 1899 Hoffenheim | Bayer 04 Leverkusen | €2m |
| 2026-07-21 | Alejo Sarco | Bayer 04 Leverkusen | Sporting Gijón | Free |
| 2026-07-06 | Issa Traoré | Bayer 04 Leverkusen | AS Trencin | Loan |
| 2026-07-01 | Aleksa Damjanovic | Red Star | Leverkusen | €5m |
| 2026-07-01 | Kerim Alajbegovic | Salzburg | Leverkusen | €8m |
| 2026-07-01 | Jeremiah Mensah | Bayer Leverkusen U19 | Bayer 04 Leverkusen | Free |
| 2026-07-01 | Kennet Eichhorn | Hertha BSC | Bayer 04 Leverkusen | €9m |
| 2026-07-01 | Afonso Moreira | Olympique Lyon | Bayer 04 Leverkusen | €30m |
| 2026-07-01 | Matej Kovar | Leverkusen | PSV | €5m |
| 2026-07-01 | Piero Hincapié | Leverkusen | Arsenal | €52m |
| 2026-07-01 | Francis Onyeka | Bayer 04 Leverkusen | SV Elversberg | Free |
| 2026-07-01 | Alejandro Grimaldo | Bayer 04 Leverkusen | Atlético de Madrid | €22m |
| 2026-02-02 | Jeanuël Belocian | Leverkusen | Wolfsburg | Loan |