Augsburg
In: Arne Engels (Club NXT), Dion Beljo (Osijek), David Colina (Hadjuk Split), Irvin Cardona (Brest), Kelvin Yeboah (Genoa, loan), Nathanael Mbuku (Reims)
Out: Raphael Framberger (Sandhausen, loan), Florian Niederlechner (Hertha Berlin), Lukas Petkov (Greuther Furth, loan), Frederik Winther (Brondby, loan), Carlos Gruezo (San Jose Earthquakes)
Hertha Berlin
In: Florian Niederlechner (Augsburg), Tolga Cigerci (Ankaragucu)
Out: Davie Selke (Hertha Berlin), Dong-jun Lee (Jeonbuk Hyundai), Vladimir Darida (Aris Saloniki), Linus Gechter (Eintracht Braunschweig, loan), Davie Selke (FC Koln), Fredrik Bjorkan (Bodo/Glimt), Deyovaisio Zeefuik (Verona, loan), Santiago Ascacibar (Estudiantes, loan), Myziana Maolida (Reims, loan)
Union Berlin
In: Jerome Roussillon (Wolfsburg), Josip Juranovic (Celtic), Aissa Laidouni (Ferencvaros)
Out: Tymoteusz Puchacz (Panathinaikos, loan), Laurenz Dehl (Viktoria Berlin, loan), Fabio Schneider (Greifswalder FC), Julian Ryerson (Borussia Dortmund), Tim Skarke (Schalke, loan), Genki Haraguchi (Stuttgart, loan), Mathis Bruns (Lecce, loan)
Bochum
In: Keven Schlotterbeck (Freiburg, loan), Pierre Kunde (Olympiacos, loan)
Out: Jannes Horn (Nuremberg, loan)
Borussia Dortmund
In: Julian Ryerson (Union Berlin), Julien Duranville (Anderlecht), Thorgan Hazard (PSV Eindhoven, loan)
Out: Jayden Braaf (Verona, loan)
Cologne
In:
Out: Ondrej Duda (Verona, loan)
Eintracht Frankfurt
In: Paxten Aaronson (Philadelphia), Simon Simoni (FK Dinamo), Philipp Max (PSV Eindhoven, loan)
Out: Jerome Onguene (RB Salzburg, loan), Luca Pellegrini (Juventus, loan ended)
Freiburg
In:
Out: Keven Schlotterbeck (Bochum, loan), Kevin Schade (Brentford, loan)
Hoffenheim
In: Kasper Dolberg (Nice, loan), John Brooks (Benfica), Thomas Delaney (Sevilla, loan)
Out: Benjamin Hubner (Retired), Georginio Rutter (Leeds United)
FC Koln
In: Davie Selke (Hertha Berlin)
Out: Jonas Urbig (Jahn Regensburg, loan), Philipp Wydra (Rapid Vienna)
RB Leipzig
In:
Out: Hugo Novoa Ramos (Basel, loan)
Bayer Leverkusen
In: Noah Mbamba (Club Brugge), Patrick Pentz (Reims), Gustavo Puerta (Bogota FC)
Out: Paulinho (Atletico Mineiro, loan), Zidan Sertdemir (Nordsjaelland)
Mainz
In: Andreas Hanche-Olsen (KAA Gent), Ludovic Ajorque (Strasbourg)
Out: Niklas Tauer (Schalke, loan), Ronael Pierre-Gabriel (Espanyol, loan), Ben Bobzien (Elversberg, loan)
Monchengladbach
In: Jonas Omlin (Montpellier)
Out: Rico Reitz (Sint-Truiden, loan), Yann Sommer (Bayern Munich), Torben Musel (RW Essen)
Bayern Munich
In: Daley Blind (Ajax), Yann Sommer (Borussia Monchengladbach), Joao Canelo (Manchester City, loan)
Out: Marcel Sabitzer (Manchester United, loan)
Schalke 04
In: Niklas Tauer (Mainz, loan), Jere Uronen (Stade Brestois, loan), Michael Frey (Royal Antwerp, loan), Tim Skarke (Union Berlin, loan), Moritz Jenz (Lorient, loan), Eder Balanta (Club Brugge, loan)
Out: Florian Flick (Nuremberg, loan), Kerim Clhanoglu (SV Sandhausen, loan), Florent Mollet (Nantes), Jordan Larsson (FC Copenhagen, loan)
Stuttgart
In: Genki Haraguchi (Union Berlin, loan), Gil Dias (Benfica)
Out: Mateo Klimowicz (San Luis, loan), Alexis Tibidi (Troyes), Naouirou Ahamada (Crystal Palace)
Werder Bremen
In: Maximilian Philipp (Werder Bremen, loan)
Out: Benjamin Goller (Nuremberg, loan), Nicolai Rapp (Kaiserslauten, loan), Oliver Burke (Millwall, loan)
Wolfsburg
In: Nicolas Cozza (Montpellier)
Out: Max Kruse (released), Jerome Roussillon (Union Berlin), Josip Brekalo (Fiorentina), Maximilian Philipp (Werder Bremen, loan)