| 249 runs | Somerset v Glamorgan | County Ground, Taunton | a20759 |
| 178 runs | Worcestershire v Glamorgan | County Ground, New Road, Worcester | a20724 |
| 159 runs | Sussex v Worcestershire | County Ground, Hove | a20672 |
| 149 runs | Durham v Hampshire | Emirates Durham International Cricket Ground, Chester-le-Street | a20540 |
| 130 runs | Hampshire v Warwickshire | Edgbaston, Birmingham | a20590 |
| 119 runs | Northamptonshire v Netherlands | County Ground, Northampton | a20607 |
| 115 runs | Somerset v Lancashire | County Ground, Taunton | a20709 |
| 100 runs | Yorkshire v Derbyshire | Headingley, Leeds | a20573 |