The January transfer window is open. Below is every completed deal in the Eredivisie. 

ADO Den Haag

In-

Out-

Ajax

In- Nicolás Tagliafico (Independiente), Nicolas Kühn (RB Leipzig) Rasmus Nissen Kristensen (FC Midtjylland)

Out- Damil Dankerlui (Willem II), Mauro Savastano (Go Ahead, loan)

AZ Alkmaar

In- Oussama Idrissi (Groningen)

Out- Abdel Malek El Hasnaoui (FC Eindhoven), Levi Opdam (Go Ahead Eagles, loan), Dabney dos Santos (Sparta Rotterdam, loan), Fred Friday (Sparta Rotterdam, loan), Levi Garcia (Excelsior, loan)


Excelsior

In- Levi Garcia (AZ, loan)

Out-

Feyenoord

In- Robin van Persie (Fenerbahce)

Out-Kenneth Vermeer (Club Brugge, loan)

Groningen

In-

Out- Oussama Idrissi (AZ), Danny Hoesen (San Jose), Ruben Yttergard Jenssen (Kaiserslautern, loan)

Heerenveen

In- Dave Bulthuis (Qabala), Martin Hansen (Ingolstadt)

Out- Simon Thern (Norrkoping)

Heracles

In-

Out- Joey Pelupessy (Sheffield Wednesday)

NAC Breda

In- Lucas Schoofs (Gent, loan)

Out- Jeff Stans (released)

PEC Zwolle

In- Ruben Ligeon (free agent)

Out-

PSV Eindhoven

In- Maximiliano Romero (Velez Sarsfield)

Out- Jurgen Locadia (Brighton), Adam Maher (Twente)

Roda JC

In- Maecky Ngombo (free agent), Donis Avdijaj (Schalke, loan)

Out- Frederic Ananou (Ingolstadt)

Sparta Rotterdam

In- Dabney Dos Santos (AZ, loan), Fred Friday (AZ, Loan), Soufyan Ahannach (Brighton, loan)

Out- George Dobson (Walsall), Bryan Janssen (Dordrecht), Daniel Breedijk (Dordrecht)

Twente

In- Adam Maher (PSV), Mounir El Hamdaoui (free agent)

Out- Isaac Buckley-Ricketts (Oxford United, loan) Dejan Trajkovski (Puskas Akademia)

Utrecht

In- Mateusz Klich (Leeds United, loan)

Out- Edson Braafheid (released)

Vitesse 

In-

Out-

VVV Venlo

In- Romeo Castelen (free agent), Emil Ris Jakobsen (Derby County, loan)

Out-Terry Antonis (Melbourne Victory), Kelechi Nwakali (end of loan from Arsenal)

Willem II

In- Giliano Wijnaldum (Philadelphia Union), Damil Dankerlui (Ajax)

Out- Thomas Kok (Dordrecht, loan)