| Inns | HS |
| 351-6 | 66 | Old Merchant Taylors v Lancing Rovers | Merchant Taylors' School Ground, Northwood | 2024 |
| 332 | 67 | Old Merchant Taylors v Old Cheltonians | Merchant Taylors' School Ground, Northwood | 2022 |
| 312-5 | 98 | Old Merchant Taylors v Old Alleynians | Durrants Sports Ground, Croxley Green | 2002 |
| 280-6 | 53 | Old Merchant Taylors v Old Cliftonians | Durrants Sports Ground, Croxley Green | 2005 |
| 279-6 | 78 | Old Merchant Taylors v Old Cliftonians | Durrants Sports Ground, Croxley Green | 1976 |
| 263-8 | 67 | Old Merchant Taylors v Old Cholmeleians | Highgate School Ground, Highgate | 2009 |
| 257 | 78 | Old Merchant Taylors v Old Tonbridgians | Tonbridge School Ground, Tonbridge | 1998 |
| 254 | 97* | Old Merchant Taylors v Old Cliftonians | Clifton College Close Ground, Clifton | 2006 |
| 253-7 | 70 | Old Merchant Taylors v Old Whitgiftians | Durrants Sports Ground, Croxley Green | 2010 |
| 252-5 | 75 | Old Merchant Taylors v Uppingham Rovers | Durrants Sports Ground, Croxley Green | 2000 |
| 248-8 | 63 | Old Merchant Taylors v Old Cheltonians | College Ground, Cheltenham | 2015 |
| 237-7 | 97 | Old Merchant Taylors v Old Brightonians | Brighton College Ground, Brighton | 2022 |
| 235-7 | 71 | Old Merchant Taylors v Old Tonbridgians | Tonbridge School Ground, Tonbridge | 2004 |
| 225 | 61 | Old Merchant Taylors v Oundle Rovers | Durrants Sports Ground, Croxley Green | 1981 |
| 225-5 | 50 | Old Merchant Taylors v Rugby Meteors | Durrants Sports Ground, Croxley Green | 1993 |
| 223-7 | 71 | Old Merchant Taylors v Stowe Templars | Stowe School Ground, Stowe | 1969 |
| 220-9 | 62 | Old Merchant Taylors v Old Wellingtonians | Wellington College, Crowthorne | 1972 |
| 214-8 | 74 | Old Merchant Taylors v Harrow Wanderers | Merchant Taylors' School Ground, Northwood | 2018 |
| 210-8 | 69 | Old Merchant Taylors v Harrow Wanderers | Harrow School Cricket Ground, Harrow-on-the-Hill | 1993 |
| 203-5 | 76 | Old Merchant Taylors v Marlborough Blues | Durrants Sports Ground, Croxley Green | 1974 |
| 203-9 | 43 | Old Merchant Taylors v Repton Pilgrims | Durrants Sports Ground, Croxley Green | 1983 |
| 201 | 56 | Old Merchant Taylors v Old Alleynians | Durrants Sports Ground, Croxley Green | 1969 |
| 199-9 | 42 | Old Merchant Taylors v Shrewsbury Saracens | Shrewsbury School, Shrewsbury | 1989 |
| 193-9 | 72 | Old Merchant Taylors v Bradfield Waifs | Bradfield College, Reading | 1988 |
| 190-7 | 45* | Old Merchant Taylors v Old Wellingtonians | Durrants Sports Ground, Croxley Green | 1993 |
| 189 | 68 | Old Merchant Taylors v Charterhouse Friars | Charterhouse School, Godalming | 1984 |
| 188-9 | 63 | Old Merchant Taylors v Sherborne Pilgrims | Sherborne School, Sherborne | 1990 |
| 187-9 | 48 | Old Merchant Taylors v Stowe Templars | Stowe School Ground, Stowe | 1972 |
| 187-5 | 89* | Old Merchant Taylors v Old Wellingtonians | Wellington College, Crowthorne | 1997 |
| 187 | 43 | Old Merchant Taylors v Sherborne Pilgrims | Sherborne School, Sherborne | 2001 |
