| Season | Team | Competition | MP | G | A | Rating | ||
|---|---|---|---|---|---|---|---|---|
| 2026 | Kopavogur | League Cup | 2 | 2 | 0 | 0 | 0 | – |
| 2025 | Kopavogur | Icelandic Cup | 1 | 1 | 0 | 0 | 0 | – |
| 2025 | Kopavogur | League Cup | 4 | 0 | 0 | 0 | 0 | – |
| 2025 | Valur | Reykjavik Cup | 4 | 0 | 0 | 0 | 0 | – |
| 2024 | Kopavogur | Icelandic Cup | 2 | 0 | 0 | 0 | 0 | – |
| 2024 | Kopavogur | League Cup | 1 | 0 | 0 | 0 | 0 | – |
| 2024 | Valur | Reykjavik Cup | 1 | 0 | 0 | 0 | 0 | – |
| 2022 | Stjarnan | League Cup | 2 | 0 | 0 | 0 | 0 | – |
| Total | 17 | 3 | 0 | 0 | 0 | – | ||
| Date | From | To | Type | |
|---|---|---|---|---|
| - | Valur | Kopavogur | Free agent | |
| 01 Oct 2025 | Kopavogur | Valur | Return from loan | |
| - | Valur | Kopavogur | Loan | |
| - | Selfoss | Valur | Free agent | |
| - | Fulham | Selfoss | Free agent | |
| - | Selfoss | Fulham | Return from loan | |
| 08 Feb 2022 | Fulham | Selfoss | Loan | |
| 07 May 2022 | Stjarnan | Fulham | Return from loan | |
| - | Fulham | Stjarnan | Loan | |
| - | Selfoss | Fulham | Transfer |
A. Antonsson Thorsteinn career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.