| Ranking | School | Gender | Latest Results From | A Levels (% A*-A) |
| 1 | Oxford International College OIC | Co-ed | 2021 | 98 |
| 2 | Cardiff Sixth Form College | Co-ed | 2021 | 97.8 |
| 3 | Cardiff Academy Sixth Form College | Co-ed | 2020 | 96 |
| 4 | Concord College | Co-ed | 2021 | 94 |
| 5 | Wycombe Abbey | Girls | 2021 | 93.9 |
| 6 | National Mathematics and Science College | Co-ed | 2021 | 93 |
| 7 | St Swithun’s School | Girls | 2021 | 88.6 |
| 8 | St Mary’s School Ascot | Girls | 2020 | 87 |
| 9 | Brighton College | Co-ed | 2021 | 87 |
| 10 | Tonbridge School | Boys | 2021 | 87 |
| 11 | Truro High School for Girls | Girls | 2020 | 85 |
| 12 | Queen Ethelburga’s College | Co-ed | 2021 | 85 |
| 13 | The Faculty of Queen Ethelburga’s | Co-ed | 2021 | 85 |
| 14 | Cheltenham Ladies’ College | Girls | 2021 | 84.3 |
| 15 | St Paul’s School | Boys | 2021 | 83 |
| 16 | Benenden School | Girls | 2021 | 83 |
| 17 | Caterham School | Co-ed | 2021 | 83 |
| 18 | Whitgift School | Boys | 2021 | 82 |
| 19 | Ruthin School | Co-ed | 2020 | 81 |
| 20 | City of London Freemen’s School | Co-ed | 2021 | 81 |
| 21 | Stephen Perse Foundation | Co-ed | 2021 | 81 |
| 22 | St Mary’s School, Cambridge | Girls | 2021 | 81 |
| 23 | Eton College | Boys | 2021 | 80.8 |
| 24 | St Michael School | Co-ed | 2021 | 80.2 |
| 25 | Abingdon School | Boys | 2021 | 80.2 |
| 26 | Roedean School | Girls | 2020 | 79.2 |
| 27 | Wellington College | Co-ed | 2020 | 79 |
| 28 | St Francis’ College | Girls* | 2021 | 78 |
| 29 | Fettes College | Co-ed | 2021 | 78 |
| 30 | Queen Margaret’s School | Girls | 2021 | 77 |
| 31 | Westminster School | Boys | 2021 | 76.2 |
| 32 | St Catherine’s, Bramley | Girls | 2020 | 75.4 |
| 33 | Dulwich College | Boys | 2020 | 75 |
| 34 | Mayfield School | Girls | 2020 | 75 |
| 35 | Malvern St James | Girls | 2021 | 75 |
| 36 | Cheltenham College | Co-ed | 2021 | 75 |
| 37 | Warwick School | Boys | 2020 | 74.9 |
| 38 | Abbey College Cambridge | Co-ed | 2021 | 74 |
| 39 | Burgess Hill Girls | Girls | 2021 | 74 |
| 40 | Adcote School for Girls | Girls | 2021 | 73.5 |
| 41 | St Peter’s School, York | Co-ed | 2021 | 72 |
| 42 | Woldingham School | Girls | 2020 | 72 |
| 43 | Loughborough Grammar School | Boys | 2021 | 72 |
| 44 | Rugby School | Co-ed | 2020 | 71 |
| 45 | Queenswood School | Girls | 2021 | 70.6 |
| 46 | Haileybury | Co-ed | 2021 | 70 |
| 47 | Roedean School | Girls | 2020 | 69 |
| 48 | Ardingly College | Co-ed | 2020 | 69 |
| 49 | St Mary’s Calne | Girls | 2020 | 69 |
| 50 | Headington School | Girls | 2020 | 68.4 |
| 51 | Oundle School | Co-ed | 2021 | 68 |
| 52 | MPW Cambridge | Co-ed | 2021 | 68 |
| 53 | Epsom College | Co-ed | 2019 | 67 |
| 54 | Badminton School | Girls | 2020 | 67 |
| 55 | d’Overbroeck’s | Co-ed | 2021 | 67 |
| 56 | Harrow School | Boys | 2021 | 67 |
| 57 | Hurtwood House | Co-ed | 2021 | 67 |
| 58 | Hereford Cathedral School | Co-ed | 2021 | 67 |
| 59 | Moreton Hall School | Girls | 2020 | 66.9 |
| 60 | Norwich School | Co-ed | 2020 | 66.3 |
| 61 | Charterhouse | Co-ed | 2021 | 66 |
| 62 | Monmouth School for Boys | Boys | 2021 | 65.8 |
| 63 | The King’s School, Canterbury | Co-ed | 2020 | 65.4 |
| 64 | Radley College | Boys | 2019 | 65.2 |
| 65 | New Hall School | Co-ed | 2020 | 65 |
| 66 | Dauntsey’s School | Co-ed | 2021 | 64 |
| 67 | Berkhamsted School | Co-ed | 2021 | 63.1 |
| 68 | Kingswood School | Co-ed | 2021 | 63 |
| 69 | The Maynard School | Girls | 2020 | 62.9 |
| 70 | Downe House School | Girls | 2020 | 62.2 |
| 71 | Durham School | Co-ed | 2021 | 62.1 |
| 72 | Reddam House Berkshire | Co-ed | 2021 | 62 |
| 73 | Bromsgrove School | Co-ed | 2021 | 62 |
| 74 | MPW London | Co-ed | 2021 | 62 |
| 75 | The Royal High School Bath GDST | Girls | 2020 | 61.7 |
| 76 | Ipswich School | Co-ed | 2020 | 61 |
| 77 | Bedford School | Boys | 2020 | 61 |
| 78 | MPW Birmingham | Co-ed | 2021 | 61 |
| 79 | Abbey College, Manchester | Co-ed | 2021 | 61 |
| 80 | The Godolphin School | Girls | 2020 | 60 |
| 81 | Sherborne Girls | Girls | 2020 | 59 |
| 82 | Downside School | Co-ed | 2020 | 58 |
| 83 | The Royal School, Haslemere | Co-ed | 2021 | 57 |
| 84 | Ashford School | Co-ed | 2021 | 57 |
| 85 | Winchester College | Boys | 2021 | 56.1 |
| 86 | Brentwood School | Co-ed | 2020 | 55.1 |
| 87 | Clifton College | Co-ed | 2020 | 55 |
| 88 | Eastbourne College | Co-ed | 2020 | 55 |
| 89 | Leweston School | Co-ed | 2020 | 55 |
| 90 | St Edward’s Oxford | Co-ed | 2020 | 55 |
| 91 | Shiplake College | Co-ed | 2020 | 55 |
| 92 | Repton School | Co-ed | 2020 | 54.8 |
| 93 | Woodbridge School | Co-ed | 2020 | 54.5 |
| 94 | King’s School Ely | Co-ed | 2020 | 54 |
| 95 | The Leys School | Co-ed | 2019 | 52 |
| 96 | Strathallan School | Co-ed | 2020 | 51 |
| 97 | Bruton School for Girls | Girls | 2021 | 50 |
| 98 | Kirkham Grammar School | Co-ed | 2020 | 50 |
| 99 | Lancing College | Co-ed | 2020 | 50 |
| 100 | Wellington School | Co-ed | 2020 | 50 |