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.
21. Corey Smith (Dungannon Swifts)
Northern Ireland youth international Corey Smith has joined Dungannon Swifts from Coleraine. Photo: Stephen Hamilton/Presseye
22. Gideon Tetteh (Portadown)
Gideon Tetteh made his Portadown debut in their Irish Cup tie against Annagh United. Photo: Portadown FC
23. Matthew Olosunde (Carrick Rangers)
American international Matthew Olosunde, who is pictured in Premier League 2 action for Manchester United, joined Carrick Rangers. Photo: Alex Morton/Getty Images
24. Lorcan Donnelly (Carrick Rangers)
Lorcan Donnelly has signed a new long-term contract with Glentoran and will join Carrick Rangers on loan until the end of the season. Photo: Glentoran FC