Celtic January transfers and net spend: Every confirmed signing and sale for Martin O'Neill's side in 2026 winter window

The 2025-26 season has been a turbulent one for Celtic so far, with the Bhoys already having three different managers in charge and rumours circulating over major departures in the near future.

Wilfried Nancy was appointed head coach in early December, but after eight matches in charge with six defeats in that time, he was dismissed from the role.

Martin O'Neill, who led the club on an interim basis between October and December, was re-appointed following Nancy's departure.

The immediate task is to close the gap on Hearts who currently sit at the top of the Scottish Premiership, six points ahead of Celtic. 

The club have been active in the transfer market as they look to strengthen the squad for the Northern Irish manager, and more deals could still take place in the final days of the window.

Here, Sports Mole rounds up all of Celtic's confirmed ins and outs during the 2026 January transfer window, as well as looking at their net spend and latest transfer rumours.

Celtic confirmed transfers in: January 2026

Julian Araujo (loan from Bournemouth)

Tomas Cvancara (loan from Borussia Monchengladbach)

Odim Holm (end of loan from Los Angeles FC)

Stephen Welsh (end of loan from Motherwell)

Adam Montgomery (end of loan from Livingston)

Junior Adamu (FW | Loan from Freiburg)

Benjamin Arthur (CB | Loan from Brentford)

Joel Mvuka (RM | Loan from FC Lorient)

Alex Oxlade-Chamberlain (AM | Free transfer)

Celtic confirmed transfers out: January 2026

Hayato Inamura (loan to FC Tokyo)

Shin Yamada (loan to Preussen Munster)

Jahmai Simpson-Pusey (end of loan to Manchester City)

Johnny Kenny (FW | Loan to Bolton Wanderers)

Tobi Oluwayemi (GK | Undisclosed to Leyton Orient)

Celtic net spend: January 2026

Celtic total spend January 2026: £0m

Celtic total income January 2026: £0m

Celtic net spend January 2026: £0m

Latest Celtic transfer rumours for January 2026

In

© Imago

Mohamed Bamba (Lorient)

Ignacio Laquintana (Red Bull Bragantino)

Wessam Abou Ali (Columbus Crew)

Out

© Imago

You can find a complete list of the latest Celtic transfer rumours by clicking here

When does the 2026 January transfer window open and close?

The January transfer window opened on Thursday, January 1 for all English and Scottish clubs, and will run through to the first weekday of February.

This means that deadline day for the 2026 January transfer window falls on Monday, February 2, with the window closing at 7pm GMT.