| Cougar Security | Unknown | - | - | government contract suppliers |
| COUGHLAN TRUSTEES 2024 LIMITED | Registered | NZ Limited Company | 9155375 | councillor interest |
| COULSHED ELECTRICAL SERVICES & REPAIRS LIMITED | Registered | NZ Limited Company | 2176119 | government contract suppliers |
| Coulson Aviation USA | Unknown | - | - | government contract suppliers |
| Council Farm Advisor | Unknown | - | - | councillor interest |
| Council for International Development | Registered | Incorporated Society | - | councillor interest |
| Council Strategy & Policy Performance and Monitoring | Unknown | - | - | councillor interest |
| COUNSELLING WORX 2020 LIMITED | Registered | NZ Limited Company | 7949304 | government contract suppliers |
| Counties Manuakau Sport Foundation | Unknown | - | - | government contract suppliers |
| COUNTRYWIDE RESIDENTIAL (2018) LIMITED | Registered | NZ Limited Company | 7084694 | councillor interest |
| COUP D'ETAT ENTERPRISES LIMITED | Removed | - | - | |
| CourseLoop Pty Ltd | Unknown | - | - | government contract suppliers |
| COURTNEY ROAD LIMITED | Registered | NZ Limited Company | 1830236 | councillor interest |
| COVE COMPLIANCE LIMITED | Registered | NZ Limited Company | 7865669 | government contract suppliers |
| COVEKINLOCH NEW ZEALAND LIMITED | Registered | NZ Limited Company | 2312492 | government contract suppliers |
| COVENANT TRUSTEE SERVICES LIMITED | Registered | NZ Limited Company | 2194946 | government contract suppliers |
| COVER TECHNOLOGIES (NZ) LIMITED | Registered | NZ Limited Company | 1491195 | government contract suppliers |
| Covidien Pty Limited | Unknown | - | - | government contract suppliers |
| COWATER INTERNATIONAL NEW ZEALAND LIMITED | Registered | NZ Limited Company | 1046316 | government contract suppliers |
| COXCO FARMING & HORTICULTURE LIMITED | Registered | NZ Limited Company | 823528 | kanoa recipients |
| CP AND DM STEVENS LIMITED | Unknown | - | - | government contract suppliers |
| CPC TRUSTEE LIMITED | Registered | NZ Limited Company | 6908055 | councillor interest |
| CPI NEW ZEALAND LIMITED | Registered | NZ Limited Company | 8148566 | government contract suppliers |
| CR AUTOMATION LIMITED | Registered | NZ Limited Company | 1240996 | government contract suppliers |
| CR KENNEDY (NZ) LIMITED | Registered | NZ Limited Company | 283093 | government contract suppliers |
| CR LAW LIMITED | Registered | NZ Limited Company | 7714942 | government contract suppliers |
| Craig Adam Colhoun | Unknown | - | - | government contract suppliers |
| Craig and Tracey Menpes | Unknown | - | - | government contract suppliers |
| CRAIG MAISEY BUILDERS AND GLASS LIMITED | Registered | NZ Limited Company | 7348037 | government contract suppliers |
| Craig Miasey Builders & Glass Ltd | Unknown | - | - | government contract suppliers |
| CRAIGS INVESTMENT PARTNERS LIMITED | Registered | NZ Limited Company | 447159 | government contract suppliers |
| CRANMER COURT LIMITED | Registered | NZ Limited Company | 121753 | councillor interest |
| CRAWFORD FARMS LIMITED | Registered | NZ Limited Company | 1200253 | councillor interest |
| CRB FARMING LIMITED | Registered | NZ Limited Company | 6274349 | councillor interest |
| CREATE LIMITED | Registered | NZ Limited Company | 4471199 | government contract suppliers |
| CREATE NOW MEDIA LIMITED | Registered | NZ Limited Company | 5789847 | government contract suppliers |
| CREATIVE ABILITIES AND ASSOCIATES LIMITED | Registered | NZ Limited Company | 644037 | government contract suppliers |
| CREATIVE ARCH LIMITED | Registered | NZ Limited Company | 1540081 | government contract suppliers |
| CREATIVE ARTS NAPIER / NGA RINGATOI AUAHA O AHURIRI INCORPORATED | Registered | - | - | |
| Creative Arts Trust | Unknown | - | - | government contract suppliers |
| Creative Capital Arts Trust | Registered | Charitable Trust | - | councillor interest |
| Creative communities | Removed | Incorporated Society | - | councillor interest |
| Creative Communities Assessment Panel | Unknown | - | - | councillor interest |
| Creative Communities Grant Selection Committee | Unknown | - | - | councillor interest |
| Creative Communities NZ Assessment Committee | Unknown | - | - | councillor interest |
| Creative Communities Scheme | Unknown | - | - | councillor interest |
| Creative Communities Scheme Hauraki | Unknown | - | - | councillor interest |
| Creative HQ | Unknown | - | - | government contract suppliers |
| Creative Kapiti Charitable Trust | Registered | Charitable Trust | - | councillor interest |
| Creative Northland | Registered | Charitable Trust | - | councillor interest |