| SL6541 | CAINE Martin | Sheffield Tigers RUFC Ltd | 19/04/2022 | 09/03/2022 | indefinite |
| SL6652 | CALCUTT Tim | Abbey Lane Primary School | 09/06/2026 | 09/06/2026 | indefinite |
| SL6221 | CALDERBANK Perri | Supporters of Oughtibridge School | 01/09/2008 | 01/09/2010 | indefinite |
| SL6654 | CALVERT Peter | Sheffield Tigers Netball Club | 16/06/2026 | 16/06/2026 | indefinite |
| SL5675 | CAMBELL Becky | Greystones Primary School | 13/12/2010 | 01/01/2011 | indefinite |
| SL5170 | CARELESS Sandra | High Storrs School | 23/11/2010 | 01/01/2014 | indefinite |
| SL5667 | CARROLL Colleen | Meynell Primary School | 29/11/2011 | 01/01/2011 | indefinite |
| SL5945 | CARTER John | Sportsman Inn | 09/01/2012 | 01/01/2012 | indefinite |
| SL6229 | CASBOLT Amy | Breast Cancer Care | 19/09/2008 | 19/09/2008 | indefinite |
| SL6321 | CASBOLT Amy | The Circle | 01/08/2012 | 02/08/2012 | indefinite |