| COCURULLO'S LIMITED | Registered | NZ Limited Company | 1306593 | councillor interest |
| Cocurullo/Vincent Family Trust | Unknown | - | - | councillor interest |
| CODE 9 LIMITED | Registered | NZ Limited Company | 1180750 | government contract suppliers |
| COFFEE SUPPLIERS LIMITED | Removed | NZ Limited Company | 1680675 | government contract suppliers |
| COFFEY CONSTRUCTION LIMITED | Removed | NZ Limited Company | 343752 | government contract suppliers |
| Coffey Geotechnics NZ Limited | Unknown | - | - | government contract suppliers |
| Coffey International Development | Unknown | - | - | government contract suppliers |
| Coffey Services NZ Ltd | Unknown | - | - | government contract suppliers |
| COGENT LIMITED | Registered | NZ Limited Company | 1076102 | government contract suppliers |
| COGNITION EDUCATION LIMITED | Registered | NZ Limited Company | 963400 | government contract suppliers |
| COGNIZANT NEW ZEALAND LIMITED | Registered | NZ Limited Company | 1665942 | government contract suppliers |
| COGO CONNECTING GOOD LIMITED | Registered | - | - | |
| COGS LIMITED | Registered | NZ Limited Company | 3393311 | councillor interest |
| COGSWELL SURVEYS LIMITED | Registered | NZ Limited Company | 848695 | government contract suppliers |
| COHERENT SCIENTIFIC PTY. LTD. | Removed | Overseas ASIC Company | 1292168 | government contract suppliers |
| Cohesive Australia | Unknown | - | - | government contract suppliers |
| COL Investments NZ Ltd | Unknown | - | - | councillor interest |
| COLAB PLANNING LIMITED | Registered | NZ Limited Company | 8303068 | government contract suppliers |
| COLAB TRAINING & DEVELOPMENT LIMITED | Registered | NZ Limited Company | 8941208 | government contract suppliers |
| COLD COMPANY LIMITED | Unknown | - | - | government contract suppliers |
| COLDSTORE CONSTRUCTION 2008 LIMITED | Registered | NZ Limited Company | 2065442 | government contract suppliers |
| COLECTIVO LIMITED | Registered | NZ Limited Company | 5270402 | government contract suppliers |
| COLEMAN FARMS LIMITED | Registered | NZ Limited Company | 70526 | kanoa recipients |
| COLES GROUP LIMITED | Registered | - | - | |
| Colin Shore Building Ltd | Unknown | - | - | government contract suppliers |
| COLL ELECTRICAL LIMITED | Registered | NZ Limited Company | 311395 | government contract suppliers |
| COLLABORATIVE SOLUTIONS LIMITED | Registered | NZ Limited Company | 4675719 | government contract suppliers |
| COLLECTION HOUSE (NZ) LIMITED | Registered | NZ Limited Company | 972156 | government contract suppliers |
| Collective for the Homeless | Registered | Charitable Trust | - | councillor interest |
| Collective Good Foundation | Unknown | - | - | corporate donations |
| COLLECTIVE SUCCESS LIMITED | Registered | NZ Limited Company | 6457152 | government contract suppliers |
| COLLETT'S CORNER LIMITED | Registered | NZ Limited Company | 7083213 | councillor interest |
| COLLIERS NEW ZEALAND LIMITED | Registered | NZ Limited Company | 428675 | government contract suppliers |
| COLLIERS PROJECT LEADERS NZ LIMITED | Registered | NZ Limited Company | 5907167 | government contract suppliers |
| COLLIERS REAL ESTATE MANAGEMENT LIMITED | Registered | NZ Limited Company | 122731 | government contract suppliers |
| COLMAR BRUNTON ADMINISTRATION SERVICES LIMITED | Removed | NZ Limited Company | 1643213 | government contract suppliers |
| COLONIAL FIRST STATE INVESTMENTS LIMITED | Removed | Overseas Non-ASIC Company | 1157258 | fund managers |
| COLORWORX LIMITED | Removed | NZ Limited Company | 1285508 | iwi subsidiaries |
| COLSPEC CONSTRUCTION LIMITED | Registered | NZ Limited Company | 255612 | government contract suppliers |
| COLUMBA AT ASCOT (2009) LIMITED | Registered | NZ Limited Company | 2237897 | government contract suppliers |
| COMAG LIMITED | Registered | NZ Limited Company | 625135 | government contract suppliers |
| COMAN CONSTRUCTION LIMITED | Registered | NZ Limited Company | 637794 | government contract suppliers |
| COMAX FLOORING COMPANY LIMITED | Registered | NZ Limited Company | 8089445 | government contract suppliers |
| COMBINED ROAD & TRAFFIC SERVICES LIMITED | Registered | NZ Limited Company | 2103105 | government contract suppliers |
| COMBINED TECHNOLOGIES LIMITED | Registered | NZ Limited Company | 1518031 | government contract suppliers |
| COMBUSTION SOLUTIONS LIMITED | Registered | NZ Limited Company | 6862316 | government contract suppliers |
| Comcare Charitable Trust | Registered | Charitable Trust | - | government contract suppliers |
| Comfy Kiwi Homes | Unknown | - | - | government contract suppliers |
| COMHLUADAR FARMS LIMITED | Registered | NZ Limited Company | 6061307 | government contract suppliers |
| COMHOUSE CONSULTING LIMITED | Registered | NZ Limited Company | 1907913 | government contract suppliers |