| Beyond Tomorrow Trust | Registered | Charitable Trust | - | mp interest |
| BF Dowler & MJ Horrell | Unknown | - | - | councillor interest |
| BF SUTTON | Unknown | - | - | government contract suppliers |
| BG & JE SLATER PARTNERSHIP | Unknown | - | - | government contract suppliers |
| BG Assurance Pty Ltd | Unknown | - | - | charity service providers |
| BG Harris Estate | Unknown | - | - | councillor interest |
| BG&E CONSULTING LIMITED | Registered | NZ Limited Company | 7788436 | government contract suppliers |
| BGIS NEW ZEALAND LIMITED | Registered | NZ Limited Company | 1421564 | government contract suppliers |
| BGT STRUCTURES LIMITED | Registered | NZ Limited Company | 3617571 | government contract suppliers |
| BIA West | Unknown | - | - | government contract suppliers |
| BIBLIOTHECA PTY LIMITED | Registered | NZ Limited Company | 5869035 | government contract suppliers |
| BID CONSULT LIMITED | Registered | NZ Limited Company | 5253761 | government contract suppliers |
| Bid Energy ASX | Unknown | - | - | councillor interest |
| BIDFOOD LIMITED | Registered | NZ Limited Company | 1016525 | government contract suppliers |
| Bidwill Trust Hospital Board | Registered | Charitable Trust | - | government contract suppliers |
| BIG BOY DIGITAL MARKETING LIMITED | Registered | NZ Limited Company | 5834590 | councillor interest |
| Big Brothers Big Sisters | Unknown | - | - | corporate donations |
| BIG DADDY ADVENTURES LIMITED | Removed | NZ Limited Company | 1831907 | kanoa recipients |
| BIG HOLLOW LIMITED | Registered | NZ Limited Company | 3849476 | councillor interest |
| Big Rock Trust | Unknown | - | - | councillor interest |
| BIG SAVE LIMITED | Registered | NZ Limited Company | 579363 | government contract suppliers |
| BIG STREET BIKERS LIMITED | Registered | - | - | |
| BigEars | Registered | NZ Limited Company | - | government contract suppliers |
| Bigfoot Adventures Ltd | Unknown | - | - | government contract suppliers |
| BIGPLAN GROUP LIMITED | Registered | NZ Limited Company | 3911779 | government contract suppliers |
| Bike Geraldine Inc | Registered | Incorporated Society | - | councillor interest |
| Bike Taupo Advocacy Group Inc | Registered | Incorporated Society | - | kanoa recipients |
| Bike Wānaka Inc | Registered | Incorporated Society | - | councillor interest |
| BIKINI BOTTOM LIMITED | Registered | NZ Limited Company | 2182958 | councillor interest |
| Bill Noell | Unknown | - | - | government contract suppliers |
| Bill Wasley Consulting Ltd | Unknown | - | - | government contract suppliers |
| Billmac Investments Limited T/A Cambridge Homes North Waikato | Unknown | - | - | government contract suppliers |
| BINDRA URBAN PROPERTIES LIMITED | Registered | - | - | |
| BIO PACIFIC SEAPHARM LIMITED | Registered | NZ Limited Company | 1000131 | councillor interest |
| Bio-Excel New Zealand Ltd | Unknown | - | - | government contract suppliers |
| BIO-RAD LABORATORIES PTY LTD | Removed | Overseas ASIC Company | 428575 | government contract suppliers |
| Bio-Strategy NZ Ltd | Unknown | - | - | government contract suppliers |
| BIODECON SOLUTIONS LIMITED | Registered | NZ Limited Company | 4292638 | government contract suppliers |
| BIODIRECTIONZ LIMITED | Registered | NZ Limited Company | 1481562 | government contract suppliers |
| BIOMED LIMITED | Registered | NZ Limited Company | 703621 | government contract suppliers |
| BIOMED TECHNOLOGY SERVICES NZ LIMITED | Registered | NZ Limited Company | 9342914 | government contract suppliers |
| BIOMEDICAL SERVICES NEW ZEALAND LIMITED | Registered | NZ Limited Company | 669676 | government contract suppliers |
| BIOPACIFIC NZ LIMITED | Removed | NZ Limited Company | 3224807 | government contract suppliers |
| BIOPACIFIC PARTNERS LIMITED | Registered | NZ Limited Company | 2204144 | government contract suppliers |
| BIORESEARCHES GROUP LIMITED | Removed | NZ Limited Company | 5723772 | government contract suppliers |
| BIOSCIENTIFIC SOLUTIONS LIMITED | Registered | NZ Limited Company | 1290308 | government contract suppliers |
| Biosecurity Advisory Group | Unknown | - | - | councillor interest |
| BIOSECURITY TRAINING SOUTH LIMITED | Registered | NZ Limited Company | 6735294 | government contract suppliers |
| BIOTOOLS PTY LTD | Registered | Overseas ASIC Company | 8909368 | government contract suppliers |
| BIOTRONIK | Unknown | - | - | government contract suppliers |