| Cynfran Pre-school | £56k | FY2025 | |
| CYNGHRAIR SEIRIOL ALLIANCE | £121k | FY2025 | going concern |
| Cyngor ar Bopeth Conwy Gwynedd Citizens Advice | £1.2m | FY2025 | going concern |
| CYNGOR AR BOPETH SIR DDINBYCH CITIZENS ADVICE DENBIGHSHIRE | £1.1m | FY2025 | |
| CYNGOR CELFYDDYDAU CYMRU | £57.7m | FY2025 | trustee payments |
| CYNGOR LLYFRAU CYMRU-THE BOOKS COUNCIL OF WALES | £7.5m | FY2025 | |
| CYNGOR YSGOLION SUL AC ADDYSG GRISTNOGOL CYMRU | £155k | FY2024 | |
| CYNNAL CYMRU - SUSTAIN WALES | £520k | FY2025 | |
| CYNON VALLEY MUSEUM TRUST | £165k | FY2025 | |
| CYNON VALLEY P.A.L.S. PLAY AND LEISURE FOR CHILDREN WITH DISABILITIES | £51k | FY2025 | |
| CYNTHIA SPENCER HOSPICE CHARITY | £2.9m | FY2025 | |
| THE CYRENIANS LTD | £38.0m | FY2025 | |
| THE CYRIL AND EVE JUMBO CHARITABLE TRUST | £1.1m | FY2025 | |
| THE CYRIL AND YVONNE KORN CHARITABLE TRUST | £0 | FY2025 | |
| THE CYRIL SHACK TRUST | £61k | FY2025 | |
| THE CYRIL TAYLOR CHARITABLE FOUNDATION | £2.7m | FY2023 | |
| Cysters | £44k | FY2024 | going concern |
| CYSTIC FIBROSIS CARE | £269k | FY2024 | |
| CYSTIC FIBROSIS COMFORT FUND | £70k | FY2025 | |
| CYSTIC FIBROSIS TRUST | £12.0m | FY2025 | |
| CYSTINOSIS FOUNDATION OF THE UK | £34k | FY2025 | |
| CYTUN:EGLWYSI YNGHYD YNG NGHYMRU / CHURCHES TOGETHER IN WALES LIMITED | £188k | FY2024 | |
| Czech School & Community Manchester | £76k | FY2025 | |
| CZECH SCHOOL BERKSHIRE | £34k | FY2025 | |
| Côr Meibion Treforys / Morriston Male Choir | £71k | FY2025 | |