Here, premierleague.com keeps track of all the comings and goings with the transfer window due to close again at midnight on Tuesday, January 31.
Aston Villa
Out: Stefan Postma (Wolves, undisclosed)
Birmingham City
In: Chris Sutton (Celtic, free)
Out: Asa Hall (Boston United, loan)
Blackburn Rovers
Out: Matt Jansen (released)
Bolton Wanderers
In: Ali Al-Habsi (Lyn Oslo, free)
Out: Martin Djetou (released)
Charlton Athletic
Out: James Walker (Hartlepool, loan)
Chelsea
In: Maniche (Dynamo Moscow, loan)
Out: Steve Watt (Swansea, free)
Fulham
In: Antti Niemi (Southampton, undisclosed), Tony Warner (Cardiff City, undisclosed), Simon Elliott (Columbus Crew, free)
Liverpool
In: Jan Kromkamp (Villarreal, undisclosed), Paul Anderson (Hull City, in exchange for John Welsh)
Out: Josemi (Villarreal, undisclosed), John Welsh (Hull City, in exchange for Paul Anderson)
Manchester City
In: Albert Riera (Espanyol, loan)
Manchester United
In: Nemanja Vidic (Spartak Moscow, undisclosed), Patrice Evra (Monaco, undisclosed)
Out: David Jones (NEC Nijmegen, loan), Chris Eagles (Watford, loan), Mads Timm (Walsall, loan), David Bellion (Nice, loan)
Newcastle United
Out: Laurent Robert (Benfica, free)
Portsmouth
In:Benjani Mwaruwari (Auxerre, £4.1million), Emmanuel Olisadebe (Panathinaikos, free)
West Ham United
In: Yaniv Katan (Maccabi Haifa, £100,000)
Out: Luke Chadwick (Stoke City, £100,000), Gavin Williams (Ipswich Town, £300,000)
Wigan Athletic
In: Paul Scharner (Brann Bergen, undisclosed)