With January now underway, Championship clubs have until the 31st to make new signings and bolster their squads for the second half of the season.
To find out just who is doing the business in the second tier then check out the gallery below, which will be updated on a regular basis throughout the month.
1. AFC Bournemouth
In: James Hill (Fleetwood, £1m); Ethan Laird (Manchester Utd, loan); Freddie Woodman (Newcastle United, loan); Nat Phillips (Liverpool, loan); Todd Cantwell (Norwich, loan); Siriki Dembele (Peterborough); Kieffer Moore (Cardiff). Out: Steve Cook (Nottingham Forest, undisc); Sam Sherring (Cambridge, loan); Christian Saydee (Burton, loan).
In: Amine Bassi (Metz, loan); Domingos Quina (Watford, loan). Out: Ben Williams (Cheltenham Town, undisc); Tomas Kalinauskas (AFC Wimbledon, loan); Toby Sibbick (Hearts, undisc).
3. Birmingham City
In: Teden Mengi (Man Utd); Taylor Richards (Brighton); Onel Hernandez (Norwich); Juninho Bacuna (Rangers); Lyle Taylor (Notts Forest). Out: Caolan Boyd-Munce (Middlesbrough); Chuks Aneke (Charlton); Harlee Dean (Sheff Weds); Mitchell Roberts (Carlisle); Ivan Sanchez (Real Valladolid); Sam Cosgrove (AFC Wimbledon).
4. Blackburn Rovers
In: James Brown (free); Deyovaisio Zeefuik (Hertha Berlin, loan); Dilan Markanday (Spurs, undisc); Ryan Hedges (Aberdeen, undisc); Ryan Giles (Wolves, loan). Out: Sam Burns (Scunthorpe, loan); Hayden Carter (Portsmouth, loan); Tyler Magloire (Northampton, loan); Dan Butterworth (Fleetwood, loan); Harry Chapman (Burton, loan).