| Civic Awards Committee | Unknown | - | - | councillor interest |
| CIVIC BUILDING LIMITED | Registered | NZ Limited Company | 2008334 | councillor interest |
| CIVIC WASTE LIMITED | Registered | NZ Limited Company | 5565466 | government contract suppliers |
| CIVICA PTY LIMITED | Registered | Overseas ASIC Company | 1546597 | government contract suppliers |
| Civik | Unknown | - | - | corporate donations |
| Civil + Build | Unknown | - | - | government contract suppliers |
| Civil Alliance | Unknown | - | - | government contract suppliers |
| CIVIL AND LAND CONSTRUCTION LIMITED | In Liquidation | NZ Limited Company | 2073178 | government contract suppliers |
| CIVIL ASSIST LIMITED | Registered | NZ Limited Company | 6808713 | government contract suppliers |
| CIVIL COMPASS LIMITED | Registered | NZ Limited Company | 8292031 | government contract suppliers |
| CIVIL CONCRETE LIMITED | Removed | NZ Limited Company | 1623977 | government contract suppliers |
| Civil Consrtuction Services | Unknown | - | - | government contract suppliers |
| CIVIL CONSTRUCTION LIMITED | Removed | NZ Limited Company | 485178 | government contract suppliers |
| Civil Defence Emergency Management | Registered | Charitable Trust | - | councillor interest |
| Civil Defence Emergency Management Group | Unknown | - | - | councillor interest |
| Civil Defense Emergency Management Group | Unknown | - | - | councillor interest |
| CIVIL PROJECT SOLUTIONS LIMITED | Registered | NZ Limited Company | 4840119 | government contract suppliers |
| CIVILWORKS LIMITED | Registered | NZ Limited Company | 6317767 | government contract suppliers |
| CIVTEC LIMITED | Registered | NZ Limited Company | 4894099 | government contract suppliers |
| CJ & RA Dillon Family Trust | Unknown | - | - | councillor interest |
| CJ ARCHITECTS LIMITED | Registered | NZ Limited Company | 2325168 | government contract suppliers |
| CJ DONNELLY INDUSTRIES LIMITED | Registered | NZ Limited Company | 2370871 | government contract suppliers |
| CJC MANAGEMENT SOLUTIONS LIMITED | Registered | - | - | |
| CJF McKelvie Trust | Unknown | - | - | mp interest |
| CJPJ & ASSOCIATES LIMITED | Registered | NZ Limited Company | 8937069 | government contract suppliers |
| CKC HOLDINGS LIMITED | Registered | NZ Limited Company | 1609770 | government contract suppliers |
| CKL NZ LIMITED | Registered | NZ Limited Company | 386984 | government contract suppliers |
| CKS Audit | Registered | NZ Limited Company | - | charity service providers |
| Claire Perkins | Unknown | - | - | government contract suppliers |
| Clarence St Theatre | Unknown | - | - | councillor interest |
| CLARION INVESTMENTS LIMITED | Removed | - | - | |
| CLARITY CLOUDWORKS LIMITED | Registered | NZ Limited Company | 6977693 | political donors |
| CLARITY EDUCATION NZ LIMITED | Registered | NZ Limited Company | 6430512 | government contract suppliers |
| CLARIVATE ANALYTICS (NEW ZEALAND) HOLDINGS LIMITED | Registered | NZ Limited Company | 6292727 | government contract suppliers |
| Clarivate Analytics UK Ltd | Unknown | - | - | government contract suppliers |
| CLARK FAMILY TRUST LIMITED | Removed | NZ Limited Company | 1356130 | councillor interest |
| CLARK'S PACIFIC LIMITED | Registered | NZ Limited Company | 90626 | government contract suppliers |
| Clarke and Haack Construction | Unknown | - | - | government contract suppliers |
| CLARKE CRAW & COMPANY NOMINEES LIMITED | Registered | NZ Limited Company | 940039 | councillor interest |
| CLARKE ENERGY (AUSTRALIA) PTY. LTD. | Registered | Overseas ASIC Company | 1037981 | government contract suppliers |
| Clarke Horrell Farm trust | Unknown | - | - | councillor interest |
| Clarke of Works Ltd | Unknown | - | - | government contract suppliers |
| CLARKS GARAGE LIMITED | Registered | NZ Limited Company | 2119446 | government contract suppliers |
| CLARKSON ELECTRICAL LIMITED | Registered | NZ Limited Company | 856816 | government contract suppliers |
| Clarkville Hall Committee | Unknown | - | - | councillor interest |
| Clarkville Rural Drainage Advisory Group | Unknown | - | - | councillor interest |
| CLASS LIMITED | Removed | NZ Limited Company | 7037955 | government contract suppliers |
| CLASSIC BUILDERS GROUP LIMITED | Registered | NZ Limited Company | 4074119 | government contract suppliers |
| CLASSIC COACHES LIMITED | Registered | NZ Limited Company | 949350 | government contract suppliers |
| CLASSIC DEVELOPMENTS NZW TAURIKO LIMITED | Removed | NZ Limited Company | 8137328 | councillor interest |
