| CSL LIMITED | Registered | NZ Limited Company | 4363519 | mp interest |
| CSL Seiqirus | Unknown | - | - | government contract suppliers |
| CT Gudsell QC | Unknown | - | - | government contract suppliers |
| CUBRO LIMITED | Registered | NZ Limited Company | 1579046 | government contract suppliers |
| Cucumber Digital | Unknown | - | - | government contract suppliers |
| Cuddon Ltd | Unknown | - | - | government contract suppliers |
| CUE SPORTS TARANAKI LIMITED | Removed | NZ Limited Company | 660767 | councillor interest |
| CUESKO LIMITED | Registered | NZ Limited Company | 4190478 | government contract suppliers |
| CULPAN DISTRIBUTORS LIMITED | Registered | NZ Limited Company | 894056 | government contract suppliers |
| CULTIVATING CULTURE LIMITED | Registered | NZ Limited Company | 8390182 | government contract suppliers |
| CULTURAL CONVERSATIONS | Registered | - | - | |
| CULTURE AMP PTY LTD | Registered | Overseas ASIC Company | 8200807 | government contract suppliers |
| CultureWorks Ltd/SamePage Group | Unknown | - | - | councillor interest |
| CUMPSTONE RENTALS LIMITED | Registered | NZ Limited Company | 1359384 | councillor interest |
| CUMULO9 LIMITED | Registered | NZ Limited Company | 1222675 | government contract suppliers |
| Cuncannon Partners | Unknown | - | - | government contract suppliers |
| Cunningham Passenger Services Limited t/a Cunningham Coachlines | Unknown | - | - | government contract suppliers |
| CURATIVE NZ LIMITED | Registered | NZ Limited Company | 3707738 | government contract suppliers |
| CURE KIDS LIMITED | Registered | NZ Limited Company | 690526 | councillor interest |
| CureKids | Unknown | - | - | corporate donations |
| CURIN CONTRACTORS LIMITED | Registered | NZ Limited Company | 1142871 | government contract suppliers |
| Curio Group Pty Ltd | Unknown | - | - | government contract suppliers |
| curle contracting ltd | Unknown | - | - | government contract suppliers |
| CURRIE CONSTRUCTION (2012) LIMITED | Registered | NZ Limited Company | 3766197 | government contract suppliers |
| Currie Construction (2021) Limited | Unknown | - | - | government contract suppliers |
| CURRIE CONSTRUCTION LIMITED | Removed | NZ Limited Company | 1182015 | government contract suppliers |
| Curries Construction | Registered | NZ Limited Company | - | government contract suppliers |
| CURTAIN STUDIO LIMITED | Registered | NZ Limited Company | 1689369 | government contract suppliers |
| Curtiss-Wright (Tactical Communications Group) | Unknown | - | - | government contract suppliers |
| Cushen Holdings - GM Lambert | Unknown | - | - | government contract suppliers |
| CUSHMAN & WAKEFIELD NEW ZEALAND LIMITED | Registered | NZ Limited Company | 5149101 | government contract suppliers |
| Cust and District Historical Records Society Inc | Unknown | - | - | councillor interest |
| CUSTOM CARE NURSING LIMITED | Registered | NZ Limited Company | 4037778 | government contract suppliers |
| Custom Construction | Unknown | - | - | government contract suppliers |
| CUSTOM FLEET NZ | Registered | NZ Unlimited Company | 621355 | government contract suppliers |
| CUSTOMER CARE LIMITED | Registered | NZ Limited Company | 5024668 | government contract suppliers |
| CUTHBERT STEWART LIMITED | Registered | NZ Limited Company | 5725 | government contract suppliers |
| CUTTRISS CONSULTANTS LIMITED | Registered | NZ Limited Company | 325189 | government contract suppliers |
| CW Glasgow Contractors Ltd | Unknown | - | - | government contract suppliers |
| CXD INTERNATIONAL | Unknown | - | - | government contract suppliers |
| CYBERCURE LIMITED | Registered | NZ Limited Company | 8544667 | government contract suppliers |
| CYBERCX NEW ZEALAND LIMITED | Registered | NZ Limited Company | 5880999 | government contract suppliers |
| CYBERSMART LIMITED | Registered | NZ Limited Company | 5889828 | government contract suppliers |
| Cycle Coach Janet Stark | Registered | Sole Trader | - | government contract suppliers |
| CYCLONE COMPUTER COMPANY LIMITED | Registered | NZ Limited Company | 625798 | government contract suppliers |
| Cyclone Computers Ltd | Unknown | - | - | government contract suppliers |
| CYCLONE LIMITED | Removed | NZ Limited Company | 1269187 | government contract suppliers |
| Cyclone Technology | Unknown | - | - | government contract suppliers |
| Cynthia Dow Family Trust | Unknown | - | - | councillor interest |
| Cyon Knowledge Computing Pty Ltd | Unknown | - | - | government contract suppliers |
