| ASSET DYNAMICS LIMITED | Registered | NZ Limited Company | 8293033 | government contract suppliers |
| Asset Management Business Improvement (AMBI) | Unknown | - | - | government contract suppliers |
| ASSET MANAGEMENT ENGINEERS LIMITED | Registered | NZ Limited Company | 1867024 | government contract suppliers |
| ASSET MONITORING LIMITED | Registered | NZ Limited Company | 941299 | government contract suppliers |
| ASSET PROJECT FACILITATORS LIMITED | Registered | NZ Limited Company | 3002761 | government contract suppliers |
| ASSETLIFE ALLIANCE LIMITED | Registered | NZ Limited Company | 7121594 | government contract suppliers |
| ASSETT PROPERTY MANAGEMENT LIMITED | Removed | NZ Limited Company | 6367472 | government contract suppliers |
| ASSOCIATED THERAPISTS BAY OF PLENTY LIMITED | Registered | NZ Limited Company | 9293816 | government contract suppliers |
| Assura Software Limited | Unknown | - | - | government contract suppliers |
| ASSURITY CONSULTING LIMITED | Registered | NZ Limited Company | 1652082 | government contract suppliers |
| AST Space Mobile | Unknown | - | - | councillor interest |
| AST Space Mobile, Rocket Lab | Unknown | - | - | councillor interest |
| ASTECH SRS LIMITED | Registered | NZ Limited Company | 1917987 | government contract suppliers |
| ASTILLEROS ARMON VIGO, S.A. | Unknown | - | - | government contract suppliers |
| ASTLEY CONSTRUCTION LIMITED | Registered | NZ Limited Company | 6257856 | government contract suppliers |
| Astrulab | Unknown | - | - | councillor interest |
| ASTUDA TRUSTEE CO LIMITED | Registered | NZ Limited Company | 8326147 | councillor interest |
| ASUREQUALITY LIMITED | Registered | NZ Limited Company | 926582 | government contract suppliers |
| AT THERAPY LIMITED | Registered | NZ Limited Company | 6218248 | government contract suppliers |
| ATA LIMITED | Removed | NZ Limited Company | 1265315 | government contract suppliers |
| Ataccama | Unknown | - | - | government contract suppliers |
| Atamu EFKS Porirua Incorporated | Registered | Incorporated Society | - | government contract suppliers |
| ATAWHAI INDUSTRIES TRUST | Registered | Charitable Trust | - | government contract suppliers |
| Ātea a Rangi Educational Trust | Registered | Charitable Trust | - | corporate donations |
| ATECO AUTOMOTIVE N.Z. LIMITED | Registered | NZ Limited Company | 1080345 | government contract suppliers |
| ATECO GROUP NZ LIMITED | Registered | NZ Limited Company | 4212860 | government contract suppliers |
| Ateco Group NZ Ltd via Neville Crichton | Unknown | - | - | political donors |
| Athenree Action Group | Unknown | - | - | councillor interest |
| Athenree Homestead Trust | Registered | Charitable Trust | - | councillor interest |
| Athfield Architects Limited | Unknown | - | - | government contract suppliers |
| Athfields Architects Limited | Unknown | - | - | government contract suppliers |
| Athletes Cooperative Incorporated | Registered | Incorporated Society | - | councillor interest |
| Athletics Nelson Inc | Registered | Incorporated Society | - | councillor interest |
| Ātiawa ki Whakarongotai Asset Holding Company Limited | Unknown | - | - | iwi subsidiaries |
| ATIAWA KI WHAKARONGOTAI CHARITABLE TRUST BOARD | Registered | Charitable Trust | - | government contract suppliers |
| ATIAWA KI WHAKARONGOTAI HOLDINGS LIMITED | Registered | NZ Limited Company | 1728125 | iwi subsidiaries |
| ATKIN CONSTRUCTION (HB) LIMITED | Registered | NZ Limited Company | 5033540 | government contract suppliers |
| Atkins Law | Unknown | - | - | government contract suppliers |
| ATKINSON & DOSSETT LIMITED | Registered | NZ Limited Company | 126645 | government contract suppliers |
| ATKINSREALIS NEW ZEALAND LIMITED | Registered | NZ Limited Company | 1725107 | government contract suppliers |
| ATL ELECTRICAL LIMITED | Registered | NZ Limited Company | 2103730 | government contract suppliers |
| ATL GROUP LIMITED | Removed | NZ Limited Company | 2115322 | government contract suppliers |
| Atlantic Pacific American Express | Unknown | - | - | government contract suppliers |
| ATLANTIS HEALTH NEW ZEALAND LIMITED | Registered | NZ Limited Company | 834483 | government contract suppliers |
| Atlas Concrete Ltd via Graham Collie | Unknown | - | - | political donors |
| ATMOSPHERE LIMITED | Removed | NZ Limited Company | 1014867 | government contract suppliers |
| ATOM TREE SPECIALISTS LIMITED | Registered | NZ Limited Company | 5898348 | government contract suppliers |
| Atomise Limited | Unknown | - | - | government contract suppliers |
| ATS Environmental | Registered | NZ Limited Company | - | government contract suppliers |
| ATTEKUS NZ LIMITED | Registered | NZ Limited Company | 9200360 | government contract suppliers |