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Active
Kristoffer Ajer
Market value
€18M
3 June 2026
Club
Brentford FCDefender
- Position detail
- Centre-back
- Preferred foot
- Right
- Born
- 17 April 1998
- Place of birth
- Rælingen, Norway
- Height
- 1.98 m
- Nationality
- Norway
- At club since
- 21 July 2021
- Contract until
- 30 June 2030
- Agent
- THE·TEAM
Next match
Premier League
AFC Bournemouthv
Brentford· Vitality Stadium, Bournemouth
Seasons
Complete seasons only, to 25/26
Seasons
15
Appearances
292
Goals
9
Assists
10
League
| Season | Competition | Team | Apps | Goals | Assists | Yellow cards | Red cards |
|---|---|---|---|---|---|---|---|
| 25/26 | Premier League | Brentford FC | 27 | 0 | 1 | 4 | 0 |
| 24/25 | Premier League | Brentford FC | 24 | 0 | 0 | 5 | 0 |
| 23/24 | Premier League | Brentford FC | 28 | 2 | 1 | 5 | 0 |
| 22/23 | Premier League | Brentford FC | 9 | 0 | 0 | 0 | 0 |
| 21/22 | Premier League | Brentford FC | 24 | 1 | 2 | 5 | 0 |
| 20/21 | Premiership | Celtic FC | 31 | 1 | 1 | 1 | 0 |
| 19/20 | Premiership | Celtic FC | 28 | 3 | 2 | 3 | 0 |
| 18/19 | Premiership | Celtic FC | 23 | 0 | 0 | 3 | 1 |
| 17/18 | Premiership | Celtic FC | 19 | 0 | 0 | 2 | 0 |
| 16/17 | Premiership | Kilmarnock FC | 16 | 0 | 0 | 2 | 0 |
Domestic cups
| Season | Competition | Team | Apps | Goals | Assists | Yellow cards | Red cards |
|---|---|---|---|---|---|---|---|
| 25/26 | EFL Cup | Brentford FC | 3 | 0 | 1 | 0 | 0 |
| 25/26 | FA Cup | Brentford FC | 1 | 0 | 0 | 0 | 0 |
| 23/24 | FA Cup | Brentford FC | 1 | 0 | 0 | 0 | 0 |
| 22/23 | EFL Cup | Brentford FC | 2 | 0 | 0 | 0 | 0 |
| 22/23 | FA Cup | Brentford FC | 1 | 0 | 0 | 0 | 0 |
| 21/22 | FA Cup | Brentford FC | 2 | 0 | 0 | 0 | 0 |
| 20/21 | SFA Cup | Celtic FC | 2 | 0 | 0 | 0 | 0 |
| 19/20 | SFA Cup | Celtic FC | 3 | 0 | 0 | 1 | 0 |
| 18/19 | SFA Cup | Celtic FC | 4 | 0 | 0 | 0 | 0 |
| 17/18 | SFA Cup | Celtic FC | 5 | 0 | 0 | 0 | 0 |
| 16/17 | SFA Cup | Kilmarnock FC | 1 | 0 | 0 | 0 | 0 |
Continental club competitions
| Season | Competition | Team | Apps | Goals | Assists | Yellow cards | Red cards |
|---|---|---|---|---|---|---|---|
| 20/21 | Europa League | Celtic FC | 5 | 0 | 1 | 0 | 0 |
| 2020 | Europa League Qualifying | Celtic FC | 2 | 0 | 0 | 0 | 0 |
| 2020 | Champions League Qu. | Celtic FC | 1 | 0 | 0 | 0 | 0 |
| 19/20 | Europa League | Celtic FC | 8 | 0 | 0 | 2 | 0 |
| 2019 | Champions League Qu. | Celtic FC | 5 | 1 | 0 | 1 | 0 |
| 2019 | Europa League Qualifying | Celtic FC | 2 | 0 | 0 | 0 | 0 |
| 2018 | Champions League Qu. | Celtic FC | 5 | 0 | 1 | 2 | 0 |
| 18/19 | Europa League | Celtic FC | 3 | 0 | 0 | 0 | 0 |
| 2018 | Europa League Qualifying | Celtic FC | 2 | 1 | 0 | 0 | 0 |
| 2017 | Champions League Qu. | Celtic FC | 2 | 0 | 0 | 1 | 0 |
| 17/18 | Europa League | Celtic FC | 2 | 0 | 0 | 0 | 0 |
| 2016 | Champions League Qu. | Celtic FC | 1 | 0 | 0 | 0 | 0 |
Shirt numbers
Squad numbers are recorded from 2013 onwards.
Club
| Season | Club | Number | Matches |
|---|---|---|---|
| 25/26 | Brentford | 20 | 43 |
| 24/25 | Brentford | 20 | 26 |
| 23/24 | Brentford | 20 | 30 |
| 22/23 | Brentford | 20 | 21 |
| 21/22 | Brentford | 20 | 29 |
| 20/21 |  Celtic | 35 | 42 |
| 19/20 | Celtic | 35 | 47 |
| 18/19 | Celtic | 35 | 41 |
| 2017 |  Kilmarnock FC | 20 | 17 |
| 17/18 | Celtic | 35 | 44 |
| 2016 | Celtic | 35 | 1 |
National team
| Season | Country | Number | Matches |
|---|---|---|---|
| 2026 |  Norway | 3 | 3 |
Career moves
| Season | To | Type | Fee |
|---|---|---|---|
| 21/22 | Brentford | Transfer | €15.7M |
| 16/17 | Celtic | Return from loan | — |
| 16/17 | Kilmarnock FC | Loan | — |
| 16/17 | Celtic | Transfer | €600K |
| 14/15 |  IK Start | Transfer | Undisclosed |
Market value
Current
€18M
- 7 Dec 2014: €300k, IK Start
- 19 Aug 2015: €800k, IK Start
- 14 Feb 2017: €800k, Kilmarnock FC
- 4 Mar 2018: €800k, Celtic
- 8 Aug 2018: €1.25m, Celtic
- 3 Jan 2019: €2m, Celtic
- 20 Aug 2019: €3m, Celtic
- 8 Apr 2020: €2.70m, Celtic
- 21 Jul 2020: €4m, Celtic
- 28 Jun 2021: €7m, Celtic
- 5 Oct 2021: €17m, Brentford FC
- 15 Jun 2022: €18m, Brentford FC
- 3 Nov 2022: €16m, Brentford FC
- 19 Dec 2023: €18m, Brentford FC
- 14 Mar 2024: €15m, Brentford FC
- 16 Dec 2024: €18m, Brentford FC
- 17 Oct 2025: €16m, Brentford FC
- 9 Mar 2026: €18m, Brentford FC
- 3 Jun 2026: €18m, Brentford FC
Last change
Common questions
Which club does Kristoffer Ajer play for?
- The current club of Kristoffer Ajer is Brentford FC.
What shirt number does Kristoffer Ajer wear?
- Kristoffer Ajer wears the number 20 shirt. The club is Brentford.
What position does Kristoffer Ajer play?
- Kristoffer Ajer plays in the position of Centre-back.
How old is Kristoffer Ajer?
- Kristoffer Ajer is 28 years old, born on 17 April 1998.
What is the market value of Kristoffer Ajer?
- The market value of Kristoffer Ajer is €18M, recorded on 3 June 2026.
How many goals has Kristoffer Ajer scored?
- In the seasons we have on record, Kristoffer Ajer has played 292 matches. In those recorded seasons Kristoffer Ajer scored 9 goals. These numbers cover the seasons in our records, and are not a complete career total.
How many international matches has Kristoffer Ajer played?
- Kristoffer Ajer has played 56 matches at international level. The national team on record is Norway. Kristoffer Ajer scored 2 international goals.
What is the nationality of Kristoffer Ajer?
- The nationality of Kristoffer Ajer is Norway.
Where was Kristoffer Ajer born?
- Kristoffer Ajer was born in Rælingen, Norway.
How tall is Kristoffer Ajer?
- The height of Kristoffer Ajer is 1.98 m.
Which foot does Kristoffer Ajer prefer?
- Kristoffer Ajer prefers the right foot.
When does the contract of Kristoffer Ajer end?
- The contract of Kristoffer Ajer runs until 30 June 2030.
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