R. Rösch
VfL BochumFree agent—27 Aug 2026
Wesley Adeh
Werder BremenLoan—30 Jun 2026
T. Dietrich
FC Schalke 04Transfer—30 Jun 2026
S. Yamada
CelticLoan—26 Jan 2026
I. Rondić
1. FC KölnLoan—26 Jan 2026
Z. Sertdemir
FC NordsjaellandTransfer—31 Aug 2025
A. Tikvić
WatfordTransfer—29 Jul 2025
P. Jaeckel
Union BerlinTransfer—15 Jul 2025
M. Schulz
Holstein KielFree Transfer—1 Jul 2025
D. Kinsombi
SC Paderborn 07Loan—16 Jan 2025- H. FriðjónssonHolstein KielFree—30 Aug 2024
A. Németh
Hamburger SVLoan—23 Aug 2024- E. Amenyido
FC St. PauliFree—10 Jul 2024 
J. MeesHolstein KielFree—1 Jul 2024
M. KirkeskovHolstein KielFree—1 Jul 2024
J. Schenk
Bayern MünchenFree—1 Jul 2024
O. HeilHamburger SV——31 Aug 2023- J. SchenkBayern MünchenLoan—26 Jul 2023
- J. Schenk
SK BeverenLoan—4 Aug 2026 
O. Batista MeierSC Paderborn 07Transfer€400k30 Jun 2026
J. ter HorstSC Paderborn 07Transfer€200k30 Jun 2026- S. YamadaCelticReturn from loan—29 Jun 2026
- I. Rondić1. FC KölnReturn from loan—29 Jun 2026
- A. NémethHamburger SV——1 Jul 2025
- D. KinsombiSC Paderborn 07Back from Loan—1 Jul 2025
- A. NémethHamburger SVReturn from loan—29 Jun 2025
N. RembergHolstein Kiel€ 120K1 Jul 2023
H. Teklab
Union St. GilloiseFree—15 Jun 2023
M. HoffmeierSC Paderborn 07——1 Jul 2022
L. Schnellbacher
SV ElversbergFree—27 Jul 2020
O. Steurer
1. FC Heidenheim——5 Jul 2020- C. Akono
FSV Mainz 05€ 350K1 Jul 2019 - J. Steinkötter
Borussia MönchengladbachFree—5 Jan 2018 - C. Müller
Aris——1 Jul 2017 - C. Philipps
Metz——1 Jul 2016