| 1 | Reading School Period 202425 | 62.9% | Grammar · Boarding · 6th | Reading, South East | Outstanding |
| 2 | The Judd School Period 202425 | 62.2% | Grammar · Day · 6th | Tonbridge, South East | — |
| 3 | Dr Challoner's Grammar School Period 202425 | 57.8% | Grammar · Day · 6th | Amersham, South East | Outstanding |
| 4 | The Royal Grammar School, High Wycombe Period 202425 | 47.7% | Grammar · Boarding · 6th | High Wycombe, South East | Good |
| 5 | Aylesbury Grammar School Period 202425 | 35.7% | Grammar · Day · 6th | Aylesbury, South East | Outstanding |
| 6 | John Hampden Grammar School Period 202425 | 31.4% | Grammar · Day · 6th | High Wycombe, South East | Outstanding |
| 7 | The Skinners' School Period 202425 | 31.0% | Grammar · Day · 6th | Tunbridge Wells, South East | Good |
| 8 | Sir Joseph Williamson's Mathematical School Period 202425 | 27.6% | Grammar · Day · 6th | Rochester, South East | Outstanding |
| 9 | Gravesend Grammar School Period 202425 | 26.9% | Grammar · Day · 6th | Gravesend, South East | — |
| 10 | Simon Langton Grammar School for Boys Period 202425 | 23.4% | Grammar · Day · 6th | Canterbury, South East | — |
| 11 | Maidstone Grammar School Period 202425 | 22.7% | Grammar · Day · 6th | Maidstone, South East | — |
| 12 | Tunbridge Wells Grammar School for Boys Period 202425 | 20.0% | Grammar · Day · 6th | Tunbridge Wells, South East | — |
| 13 | Oakwood Park Grammar School Period 202425 | 20.0% | Grammar · Day · 6th | Maidstone, South East | — |
| 14 | The Windsor Boys' School Period 202425 | 16.5% | Academy · Day · 6th | Windsor, South East | — |
| 15 | St Birinus School Period 202425 | 13.8% | Academy · Day · 6th | Didcot, South East | — |
| 16 | Glyn School Period 202425 | 13.2% | Academy · Day · 6th | Epsom, South East | Outstanding |
| 17 | The Harvey Grammar School Period 202425 | 13.2% | Grammar · Day · 6th | Folkestone, South East | — |
| 18 | Borden Grammar School Period 202425 | 12.8% | Grammar · Day · 6th | Sittingbourne, South East | — |
| 19 | The Norton Knatchbull School Period 202425 | 11.5% | Grammar · Day · 6th | Ashford, South East | Good |
| 20 | Wilmington Grammar School for Boys Period 202425 | 11.1% | Grammar · Day · 6th | Dartford, South East | — |
| 21 | Holcombe Grammar School Period 202425 | 9.7% | Grammar · Day · 6th | Chatham, South East | — |
| 22 | Desborough College Period 202425 | 8.7% | Academy · Day · 6th | Maidenhead, South East | — |
| 23 | Dover Grammar School for Boys Period 202425 | 5.6% | Grammar · Day · 6th | Dover, South East | — |
| 24 | The Forest School Period 202425 | 3.3% | Academy · Day · 6th | Wokingham, South East | Good |
| 25 | The Howard School Period 202425 | 0.0% | Academy · Day · 6th | Gillingham, South East | — |