| From | Team | Fee | Apps | Goals | To | |
|---|---|---|---|---|---|---|
| Valur | - | (Player) | ||||
| 2008 | Shrewsbury Town | Loan | 5 | 1 | 2008 | (On loan) |
| 2008 | Reading | - | 42 | 18 | 2010 | (Player) |
| 2009 | Crewe Alexandra | Loan | 15 | 3 | 2009 | (On loan) |
| 2010 | 1899 Hoffenheim | £6,000,000 | 36 | 9 | 2012 | (Player) |
| 2012 | Tottenham Hotspur | £6,800,000 | 58 | 8 | 2014 | (Player) |
| 2012 | Swansea City | Loan | 18 | 7 | 2012 | (On loan) |
| 2014 | Swansea City | - | 106 | 27 | 2017 | (Player) |
| 2017 | Everton | £45,000,000 | 136 | 25 | 2022 | (Player) |
| 2023 | Lyngby | - | 5 | 0 | 2023 | (Player) |
| 2024 | Valur | - | 19 | 11 | 2025 | (Player) |
| 2025 | Vikingur Reykjavik | - | 14 | 2 | Current | (Player) |