| 1 run | by Warwickshire | Edgbaston, Birmingham | 2009 | tt1341 |
| 1 run | by Guyana | Sir Vivian Richards Stadium, North Sound | 2010/11 | tt2062 |
| 1 run | by Glamorgan | The Cooper Associates County Ground, Taunton | 2017 | tt6421 |
| 2 runs | by Glamorgan | The SSE SWALEC Stadium, Cardiff | 2015 | tt4959 |
| 3 runs | by Kent | County Ground, Taunton | 2015 | tt4938 |
| 3 runs | by Glamorgan | County Ground, Taunton | 2015 | tt4999 |
| 3 runs | by Worcestershire | The Cooper Associates County Ground, Taunton | 2020 | tt8971 |
| 4 runs | by Middlesex | Lord's Cricket Ground, St John's Wood | 2016 | tt5772 |
| 4 runs | by Surrey | The Kia Oval, Kennington | 2017 | tt6318 |
| 4 runs | by Warwickshire | The Cooper Associates County Ground, Taunton | 2020 | tt8942 |
| 5 runs | by Sussex | County Ground, Taunton | 2015 | tt4922 |
| 5 runs | by Kent | Spitfire Ground, St Lawrence, Canterbury | 2018 | tt7142 |
| 5 runs | by Hampshire | The Ageas Bowl, Southampton | 2023 | tt12305 |
| 6 runs | by Hampshire | The Ageas Bowl, Southampton | 2015 | tt5107 |
| 7 runs | by Warwickshire | Edgbaston, Birmingham | 2007 | tt649 |
| 7 runs | by Glamorgan | County Ground, Taunton | 2014 | tt4369 |
| 8 runs | by Worcestershire | County Ground, New Road, Worcester | 2009 | tt1272 |
| 8 runs | by Worcestershire | County Ground, Taunton | 2013 | tt3715 |
| 9 runs | by Northamptonshire | County Ground, Northampton | 2020 | tt8905 |
| 10 runs | by Essex | County Ground, Taunton | 2010 | tt1766 |
| 10 runs | by Mumbai Indians | MA Chidambaram Stadium, Chepauk, Chennai | 2011/12 | tt2434 |
| 10 runs | by Northamptonshire | County Ground, Northampton | 2013 | tt3722 |
| 11 runs | by Gloucestershire | The Cooper Associates County Ground, Taunton | 2020 | tt8982 |
| 12 runs | by Kent | The Cooper Associates County Ground, Taunton | 2016 | tt5804 |
| 13 runs | by Sussex | The Cooper Associates County Ground, Taunton | 2019 | tt8006 |
| 14 runs | by Glamorgan | The SWALEC Stadium, Cardiff | 2008 | tt921 |
| 14 runs | by Surrey | County Ground, Taunton | 2014 | tt4326 |
| 14 runs | by Hampshire | The Cooper Associates County Ground, Taunton | 2022 | tt11020 |
| 15 runs | by Northamptonshire | County Ground, Northampton | 2003 | tt25 |
| 15 runs | by Surrey | The Kia Oval, Kennington | 2016 | tt5811 |
| 18 runs | by Leicestershire | Edgbaston, Birmingham | 2011 | tt2371 |
| 19 runs | by Warwickshire | County Ground, Taunton | 2003 | tt3 |