Bundesliga
On the outgoing side, three high-profile departures stand out: Álex Grimaldo has joined Atlético Madrid, Piero Hincapié has moved to Arsenal, and Matěj Kovář has completed a permanent switch to PSV Eindhoven — all confirmed on 30 June.
To replenish the squad, Leverkusen have moved decisively in the market. Kerim-Sam Alajbegović has arrived from Red Bull Salzburg, Aleksa Damjanović from FK Crvena Zvezda, Kennet Eichhorn from Hertha BSC, and Afonso Moreira from Lyon — all on 30 June. Luca Erlein has also joined from 1899 Hoffenheim, confirmed in late July. Victor Boniface has returned from his loan at Werder Bremen and is back in Leverkusen’s plans, while Matěj Kovář himself returned from a loan at PSV before his permanent exit was formalised — a sequence that reflects the administrative tidying-up common at the end of a contract cycle. The pattern is clear: Leverkusen are shedding experience and wages while simultaneously bringing in younger, hungry talent from across Europe.
Among the exits, Ken Izekor has joined Alemannia Aachen on a permanent basis, Traore has gone to AS Trenčín on loan, Francis-Ikechukwu Onyeka has joined SV Elversberg on loan, Pohl has left as a free agent to join Utrecht, and Owen has also moved to Utrecht on a permanent deal. Alejo Sarco, meanwhile, has headed to Sporting Gijón. The volume of departures — spread across Germany, the Netherlands, Slovakia, and Spain — suggests Leverkusen are conducting a thorough squad audit rather than merely trimming at the edges.
La Liga
Atlético Madrid have made one confirmed arrival this window: Álex Grimaldo, who joins from Bayer Leverkusen on a transfer. It is a statement signing for Atlético's side, adding proven top-level experience to their defensive options.
Premier League
Arsenal have secured the services of defender Piero Hincapié from Bayer Leverkusen, with the transfer confirmed on 30 June.
Eredivisie
PSV Eindhoven have confirmed the permanent signing of Matěj Kovář from Leverkusen, while Utrecht have picked up both Pohl (free agent) and Owen (transfer) from the same club. Utrecht’s double-dip into Leverkusen’s outgoings suggests an established working relationship between the two clubs this summer.
Segunda División
Sporting Gijón have brought in Alejo Sarco from Bayer Leverkusen, a further sign of the German club’s willingness to move players on across multiple leagues and levels this summer.