Augsburg
In: Ricardo Pepi (FC Dallas, £14.8m)
Out: n/a
Hertha Berlin
In: Fredrik Bjørkan (Bodø/Glimt, free), Marc-Oliver Kempf (Stuttgart, undisclosed), Lee Dong-jun (Ulsan Hyundai, £800k), Kélian Nsona (Caen, £550k)
Out: Krzysztof Piatek (Fiorentina, loan), Deyovaisio Zeefuik (Blackburn, loan), Dennis Jastrzembski (Slask Wroclaw, free), Jordan Torunarigha (KAA Gent, loan)
Union Berlin
In: Dominique Heintz (Freiburg, free), Gonzalo Castro (Stuttgart, free), Andras Schäfer (Dunajska Streda, loan), Sven Michel (Paderborn, £2m)
Out: Cedric Teuchert (Hannover, undisclosed), Fabio Schneider (KuPS, loan), Pawel Wszolek (Legia Warsaw, loan), Max Kruse (Wolfsburg, undisclosed), Rick van Drongelen (Mechelen, loan)
Arminia Bielefeld
In: George Bello (Atlanta United, £500k)
Out: Lennart Czyborra (Genoa, loan ended)
Bochum
In: Jurgen Locadia (Brighton and Hove Albion, free)
Out: Silvère Ganvoula (Cercle Brugge, loan)
Borussia Dortmund
In: n/a
Out: Ansgar Knauff (Eintracht Frankfurt, loan), Tobias Raschl (Greuther Fürth, undisclosed)
Cologne
In: Julian Chabot (Sampdoria, loan)
Out: Rafael Czichos (Chicago Fire, £420k), Sava Cestic (Rijeka, free), Jorge Meré (Club America, £840k), Noah Katterbach (Basel, loan)
Eintracht Frankfurt
In: Ansgar Knauff (Borussia Dortmund, loan)
Out: Fabio Blanco (Barcelona, £840k), Amin Younes (Napoli, loan ended)
Freiburg
In: Hugo Siquet (Standard Liège, £4 million)
Out: Dominique Heintz (Union Berlin, free)
Greuther Fürth
In: Daniel Adlung (Schweinfurt, free), Fabian Baumgärtel (Elversberg, free), Afimico Pululu (Basel, undisclosed), Andreas Linde (free agent), Tobias Raschl (Borussia Dortmund, undisclosed)
Out: Nils Seufert (Sandhausen, loan), Nunoo Sarpei (Ingolstadt, undisclosed), Emil Berggreen (free agent), Afimico Pululu (Basel, undisclosed)
Hoffenheim
In: Justin Che (FC Dallas, loan)
Out: Justin Hoogma (Heracles Almelo, undisclosed), João Klauss (Sint-Truiden, loan), Mijat Gacinovic (Panathinaikos, loan)
RB Leipzig
In: n/a
Out: Marcelo Saracchi (free agent), Brian Brobbey (Ajax, loan), Luan Cândido (RB Bragantino, £2.5m), Hwang Hee-chan (Wolves, £14m)
Bayer Leverkusen
In: Lennart Grill (Brann, loan ended), Sardar Azmoun (Zenit, undisclosed)
Out: Panagiotis Retsos (Verona, free), Nadiem Amiri (Genoa, loan)
Mainz
In: Delano Burzgorg (Heracles Almelo, loan)
Out: Jean-Philippe Mateta (Crystal Palace, £10m)
Monchengladbach
In: Dillon Hoogewerf (Manchester United, undisclosed)
Out: Torben Müsel (KAS Eupen, loan), Hannes Wolf (Swansea, loan), Denis Zakaria (Juventus, £4.2m)
Bayern Munich
In: Liu Shaoziyang (Wuhan Three Towns, undisclosed)
Out: Oliver Batista Meier (Dynamo Dresden, undisclosed), Michaël Cuisance (Venezia, £3.4m), Bright Arrey-Mbi (Cologne, loan), Adrian Fein (Dynamo Dresden, loan)
Stuttgart
In: Luis Coordes (St Pauli, undisclosed), Tiago Tomás (Sporting, loan)
Out: Gonzalo Castro (Union Berlin, free), Philipp Klement (Paderborn, loan), Marc-Oliver Kempf (Hertha Berlin, undisclosed)
Wolfsburg
In: Kevin Paredes (D.C. United, £5.2m), Max Kruse (Union Berlin, loan), Jonas Wind (FC Copenhagen, £10m)
Out: Marvin Stefaniak (Würzburg, free), Daniel Ginczek (Fortuna Düsseldorf, undisclosed), Wout Weghorst (Burnley, £12m)