| Cashmere Stream Working Group | Unknown | - | - | councillor interest |
| Cass Bay Residents Association | Registered | Incorporated Society | - | councillor interest |
| CASS MEDICAL LIMITED | Registered | NZ Limited Company | 3193228 | government contract suppliers |
| Cass Reserves Planting Group | Unknown | - | - | councillor interest |
| Cass Street Recycling Limited | Unknown | - | - | councillor interest |
| CASSELS & SONS BREWERY (WOOLSTON) LIMITED | Registered | NZ Limited Company | 4107718 | government contract suppliers |
| CASSIDY CONSTRUCTION LIMITED | Registered | NZ Limited Company | 1011539 | government contract suppliers |
| CASTALIA LIMITED | Registered | NZ Limited Company | 1237692 | government contract suppliers |
| Castlerigg Trust | Unknown | - | - | mp interest |
| CATALYST CONSULTING LIMITED | Registered | NZ Limited Company | 969163 | government contract suppliers |
| Catalyst IT | Unknown | - | - | government contract suppliers |
| CATALYST NZ LIMITED | Registered | NZ Limited Company | 5922469 | government contract suppliers |
| CATALYST.NET LIMITED | Registered | NZ Limited Company | 952897 | councillor interest |
| CATAPULT LIMITED | Registered | NZ Limited Company | 937508 | government contract suppliers |
| CATCHMENT ENGINEERING SOLUTIONS LIMITED | Registered | NZ Limited Company | 8253739 | government contract suppliers |
| Category 5 Labour Management (NZ) Limited | Registered | Limited Partnership (NZ) | - | government contract suppliers |
| CATER PLUS SERVICES NZ LIMITED | Registered | NZ Limited Company | 1772188 | government contract suppliers |
| CATERING SOLUTIONS GROUP LIMITED | Registered | NZ Limited Company | 821470 | government contract suppliers |
| Catherine McLeod | Registered | Sole Trader | - | government contract suppliers |
| Catholic Family Support Services | Registered | Special Body | - | government contract suppliers |
| Catlins Catchment Community | Unknown | - | - | councillor interest |
| CATLINS COAST BUILDING LIMITED | Registered | NZ Limited Company | 7205473 | councillor interest |
| CATLINS COAST INCORPORATED | Registered | - | - | |
| CATO BOLAM CONSULTANTS LIMITED | Registered | NZ Limited Company | 297050 | government contract suppliers |
| CATRAN CL LIMITED | Registered | NZ Limited Company | 6968836 | councillor interest |
| Catran Family Trust | Unknown | - | - | councillor interest |
| CATRAN HOLDINGS LIMITED | Registered | NZ Limited Company | 463576 | councillor interest |
| Caughey Dignon Ltd TA Northern Districts Security | Unknown | - | - | government contract suppliers |
| Cavalier Business Services | Unknown | - | - | councillor interest |
| CAVELL LEITCH LIMITED | Registered | NZ Limited Company | 5863410 | government contract suppliers |
| CAWTHRON INSTITUTE LIMITED | Registered | NZ Limited Company | 3657891 | councillor interest |
| Cawthron Institute Trust | Registered | Other Public Entity | - | mp interest |
| Cawthron Institute Trust Board | Unknown | - | - | kanoa recipientsgovernment contract suppliers |
| CAWTHRON LIMITED | Registered | NZ Limited Company | 3657932 | government contract suppliers |
| CB and PA Carson Family Trust | Unknown | - | - | councillor interest |
| CB BUILDERS LIMITED | Removed | NZ Limited Company | 7750437 | government contract suppliers |
| CB CIVIL & DRAINAGE LIMITED | Registered | NZ Limited Company | 3943358 | government contract suppliers |
| CB Norwood Distributors Ltd | Unknown | - | - | government contract suppliers |
| CBC CONSTRUCTION 2010 LIMITED | Registered | NZ Limited Company | 2474423 | government contract suppliers |
| CBG HEALTH RESEARCH LIMITED | Removed | NZ Limited Company | 1272200 | government contract suppliers |
| CBRE (AGENCY) LIMITED | Registered | NZ Limited Company | 916848 | government contract suppliers |
| CBRE LIMITED | Registered | NZ Limited Company | 916837 | government contract suppliers |
| CBS Power Solutions Limited | Unknown | - | - | government contract suppliers |
| CC PEST CONTROL LIMITED | Removed | NZ Limited Company | 1184254 | government contract suppliers |
| CC TE HUE LIMITED | Registered | NZ Limited Company | 5920361 | councillor interest |
| CCANZ | Registered | Charitable Trust | - | government contract suppliers |
| CCC FIVE LIMITED | Registered | NZ Limited Company | 5539386 | councillor interest |
| CCC GROUP LIMITED | Registered | NZ Limited Company | 5999887 | government contract suppliers |
| CCC Group Ltd t/a Triple C Contractors | Unknown | - | - | government contract suppliers |
| CCC ONE LIMITED | Registered | NZ Limited Company | 2146393 | councillor interest |