Fortuna Düsseldorf
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Felix Meiser
FC AugsburgTransfer9 Jul 2026- Felix MeiserFC AugsburgTransfer8 Jul 2026
Lasse Riess
FSV Mainz 05Loan5 Jul 2026
Dominique Heintz
1. FC KölnFree agent30 Jun 2026- Dominique Heintz1. FC KölnFree agent29 Jun 2026
Marin Ljubičić
Union BerlinLoan29 Jan 2026
Jordi Paulina
Borussia DortmundTransfer2 Jan 2026- Jordi PaulinaBorussia DortmundTransfer1 Jan 2026
Tim BreithauptFC AugsburgLoan1 Sept 2025- Tim BreithauptFC AugsburgLoan31 Aug 2025
Florent Muslija
SC FreiburgLoan8 Aug 2025
C. Itten
BSC Young BoysTransfer28 Jul 2025
Marcel LotkaBorussia DortmundFree Transfer9 Jul 2025
Christian Rasmussen
AjaxTransfer9 Jul 2025- S. Alexandropoulos
Sporting CPLoan2 Jul 2025 
L. Raimund
VfB StuttgartTransfer1 Jul 2025
Christopher Lenz
1899 HoffenheimFree Transfer1 Jul 2025
J. HettwerBorussia DortmundFree agent30 Jun 2025
Kenneth SchmidtSC FreiburgTransfer30 Jun 2025- Kenneth SchmidtSC FreiburgTransfer3 Jun 2025
A. El Azzouzi
FrosinoneFree agent12 Jul 2026- A. El AzzouziFrosinoneFree agent11 Jul 2026
K. SusoFC AugsburgTransfer9 Jul 2026- K. SusoFC AugsburgTransfer8 Jul 2026
- Christian Rasmussen
VfL BochumFree agent7 Jul 2026 - Christian RasmussenVfL BochumFree agent6 Jul 2026
- C. Itten
Werder BremenFree agent30 Jun 2026 
S. Tanaka
FC Schalke 04Transfer30 Jun 2026- Marin LjubičićUnion BerlinReturn from loan29 Jun 2026
- C. IttenWerder BremenFree agent29 Jun 2026
- Florent MuslijaSC FreiburgReturn from loan29 Jun 2026
- Tim BreithauptFC AugsburgReturn from loan29 Jun 2026
- S. TanakaFC Schalke 04Transfer29 Jun 2026
- S. AlexandropoulosSporting CPReturn from loan29 Jun 2026
- M. SobottkaVfL BochumFree agent14 Jan 2026
Jamil Siebert
LecceTransfer22 Aug 2025- M. van Brederode
AZ AlkmaarBack from Loan1 Jul 2025 
D. KownackiWerder Bremen—1 Jul 2025
Dženan Pejčinović
VfL WolfsburgBack from Loan1 Jul 2025
Moritz-Broni KwartengVfL BochumBack from Loan1 Jul 2025