It can be hard to keep track of all the activity during what is a manic month, so that’s where we come in!
Keep up to date with all the business being done by each of the 12 Premiership clubs throughout January below.
17. Will Arnold (Carrick Rangers)
Australian midfielder Will Arnold, who was with Central Coast Mariners at underage level, became Carrick Rangers' first January acquisition Photo: Richard Hood/Carrick Rangers
18. Gareth Deane (Glenavon)
Having spent the last three-and-a-half years with Coleraine, former Linfield goalkeeper Gareth Deane joined Glenavon with Rory Brown heading to the Showgrounds Photo: INPHO/Stephen Hamilton
19. Rory Brown (Coleraine)
Rory Brown became Coleraine's third signing of the window as the 23-year-old goalkeeper moved to the Showgrounds in a swap deal that resulted in Bannsiders stopper Gareth Deane moving in the opposite direction Photo: Coleraine FC
20. Steven Ball (Newry City)
Steven Ball became Barry Gray's first signing since arriving from Warrenpoint Town Photo: Brendan Monaghan Photography