Dmytro Bohdanov
Union BerlinLoan—18 Aug 2026
Luca Erlein
Bayer LeverkusenLoan—26 Jul 2026- L. Copado
SC Paderborn 07Transfer—1 Jul 2026 
L. CopadoSC Paderborn 07Transfer—1 Jul 2026
L. Bittencourt
Werder BremenFree agent—30 Jun 2026
Fousseny Doumbia
Eintracht FrankfurtLoan—30 Jun 2026
M. Cvjetinović
Holstein KielLoan—1 Feb 2026
T. Ciğerci
SivassporFree agent—1 Feb 2026- L. Copado
Lask LinzLoan—22 Aug 2024 - N. Bretschneider
AudaFree—16 Jan 2024 - T. Bornemann
Borussia DortmundFree—2 Aug 2023 - M. Crnički
FK SarajevoFree—6 Oct 2020 
L. MoserUnion BerlinLoan—4 Jul 2019
B. TazUnion BerlinLoan—1 Jul 2019- K. Scheidhauer
FC Schalke 04——1 Jan 2018 - Sebastian Schlüschen
VfL Wolfsburg——1 Jul 2016 - M. Bouziane
FSV Mainz 05Free—1 Jul 2015 - D. LückSC Paderborn 07Free—1 Jul 2015
- P. BreitkreuzHolstein KielFree—1 Jul 2015
M. Funk
VfB StuttgartFree agentFree transfer30 Jun 2026- M. CvjetinovićHolstein KielReturn from loan—29 Jun 2026
- L. CopadoLask Linz——1 Jul 2025
- L. CopadoLask LinzReturn from loan—29 Jun 2025
- L. CopadoLask LinzReturn from loan—29 Jun 2025
S. MambaSC Paderborn 07Free—1 Jul 2019
A. MeyerVfB Stuttgart€ 400K30 Aug 2017- A. Abu-Alfa
Borussia Mönchengladbach——1 Jul 2017 
S. MichelSC Paderborn 07Free—1 Jul 2016- M. BouzianeFSV Mainz 05——1 Jul 2016
- Robin Szarka
1899 Hoffenheim——1 Jul 2016 
T. Kleindienst
SC Freiburg——1 Jul 2015
K. MüllerVfB Stuttgart——1 Jun 2015- E. Jendrišek
Spartak Trnava——1 Jul 2014 - J. Hildebrandt
RB Leipzig——1 Jul 2014 
M. Sušić
CFR 1907 Cluj——1 Jul 2014- A. AffaneVfL Wolfsburg——1 Jul 2014
- M. Fetsch
FC Augsburg——1 Jul 2014 - John Jairo Mosquera Mosquera
GIL Vicente——31 Jan 2014 - D. GeurtsHolstein KielFree—1 Jul 2013