Born on the 17th of April 1998, Kristoffer Ajer is a Norwegian footballer known for his formidable presence as a central defender. At an impressive height of 1.96m (6ft 5in) and weighing 84kg (13st 3lb), Ajer has made a name for himself at Brentford, where he sports the number 20 jersey. In addition to his club commitments, Ajer represents the Norway national team.
According to Transfermarkt, Ajer's present market value stands at approximately £14m.
Prior to his successful career in Brentford, Ajer began his professional journey in Norway as a trainee at Start in the OBOS-ligaen. His debut season saw him make 13 first team appearances and score a single goal. His following season in 2015 topped this with a total of eight goals in 28 matches. His final stint with the Norwegian team in 2016 saw him play in 11 league matches.
In July 2016, Ajer moved from Norway to Scotland, joining Celtic for a fee in the vicinity of £0.75m. His career at Celtic was marked by steady progress and consistent performance. From 2017 to 2021, he made numerous appearances each season: 24 in his first season, followed by 28, 28 again with three goals, and finally 35 with two goals in his last season with the club.
In January 2017, Ajer took a brief sabbatical from Celtic, loaned out to Kilmarnock, where he made 16 appearances in the same season. However, he returned to Celtic in July that year, continuing his notable performances at the club until his eventual transfer in 2021.
Ajer departed Celtic for Brentford in July 2021, their Premier League competitors, for a formidable fee of around £14m. Currently, he is still gracing Brentford's pitch, having made numerous league appearances for the club. He has already played in 24 games in his first season, scoring once, and made his mark in a further 9 games in the following season. As of the current 2025 - 2026 season, he has made seven league appearances.
Beyond his league commitments, Ajer has also seen action in various cup matches and international fixtures, including two starts in the League Cup 2025 - 2026 for Brentford, appearances in the World Cup Qualifiers Europe 2024 - 2026 and the Euro Qualifiers 2022 - 2024 for Norway, and two starts in the Nations League 2024 - 2025 for Norway.
