| International Organisation Development Ltd | Unknown | - | - | government contract suppliers |
| INTERNATIONAL SOCIETY FOR KRISHNA CONSCIOUSNESS INCORPORATED | Registered | Incorporated Society | - | government contract suppliers |
| INTERNATIONAL WASTE LIMITED | Registered | NZ Limited Company | 2449101 | government contract suppliers |
| INTERPINE GROUP LIMITED | Registered | NZ Limited Company | 3077529 | government contract suppliers |
| INTERPRETING SERVICES LIMITED | Registered | NZ Limited Company | 2204322 | government contract suppliers |
| InterSystems Australia Pty Ltd | Unknown | - | - | government contract suppliers |
| InterVISTAS Consulting Inc. | Unknown | - | - | government contract suppliers |
| INTRAHEALTH NEW ZEALAND LIMITED | Registered | NZ Limited Company | 1237036 | government contract suppliers |
| INTRALOT NEW ZEALAND LIMITED | Registered | NZ Limited Company | 1613449 | government contract suppliers |
| INTUS DUNEDIN LIMITED | Registered | NZ Limited Company | 8126026 | government contract suppliers |
| INVACARE NEW ZEALAND | Registered | NZ Unlimited Company | 1153701 | government contract suppliers |
| InventAsia Limited trading as Prescribe Digital | Unknown | - | - | government contract suppliers |
| INVENTIC INVESTMENTS LIMITED | Removed | NZ Limited Company | 6876614 | councillor interest |
| INVERCARGILL AIRPORT LIMITED | Registered | NZ Limited Company | 606865 | kanoa recipients |
| INVERCARGILL CENTRAL LIMITED | Registered | NZ Limited Company | 7569977 | kanoa recipients |
| INVERCARGILL CHILD AND FAMILY CENTRE LIMITED | Registered | NZ Limited Company | 4367558 | government contract suppliers |
| Invercargill Licensing Trust | Registered | Other Public Entity | - | government contract suppliers |
| INVERLOCHY ART SCHOOL LIMITED | Removed | NZ Limited Company | 613058 | councillor interest |
| Investment Properties (x2, Owned By Kautha Trust) | Unknown | - | - | mp interest |
| INVESTMENT SERVICES GROUP LIMITED | Registered | NZ Limited Company | 2407272 | fund managers |
| INVESTOR CONSTRUCTION LIMITED | Removed | NZ Limited Company | 1795538 | councillor interest |
| INVESTORE PROPERTY LIMITED | Registered | - | - | |
| INVESTORS MUTUAL FUND LIMITED | Removed | NZ Limited Company | 1096388 | fund managers |
| Invictus Australia | Unknown | - | - | corporate donations |
| INVISE LIMITED | Registered | NZ Limited Company | 8126745 | government contract suppliers |
| INVIVO & CO LIMITED | Registered | NZ Limited Company | 1861924 | kanoa recipients |
| INZIDE COMMERCIAL LIMITED | Registered | NZ Limited Company | 714832 | government contract suppliers |
| InZone Education Foundation | Registered | Charitable Trust | - | corporate donations |
| InZone Industries | Unknown | - | - | government contract suppliers |
| IPFX LIMITED | Registered | NZ Limited Company | 1653934 | government contract suppliers |
| iProov | Unknown | - | - | government contract suppliers |
| IPSOS LIMITED | Registered | NZ Limited Company | 547822 | government contract suppliers |
| IQA New Zealand Limited (IQANZ) | Unknown | - | - | government contract suppliers |
| IR;PM (Estate) Coles Family Trust | Unknown | - | - | councillor interest |
| IRENE GARDINER PRODUCTIONS LIMITED | Removed | NZ Limited Company | 6419952 | |
| Iris Reuvecamp | Registered | Sole Trader | - | government contract suppliers |
| IRON MOUNTAIN NEW ZEALAND LIMITED | Registered | NZ Limited Company | 3528011 | government contract suppliers |
| IRRICON RESOURCE SOLUTIONS LIMITED | Registered | NZ Limited Company | 1975517 | government contract suppliers |
| IRRIGATION SERVICES (WAIRARAPA) LIMITED | Registered | NZ Limited Company | 1608433 | government contract suppliers |
| ISAAC BOSS LIMITED | Registered | NZ Limited Company | 7793436 | government contract suppliers |
| ISAAC CONSTRUCTION LIMITED | Registered | NZ Limited Company | 123383 | government contract suppliers |
| Isaac Henchman | Unknown | - | - | government contract suppliers |
| ISENTIA LIMITED | Registered | NZ Limited Company | 1471802 | government contract suppliers |
| ISG (Intermodal Solutions Group) Australia | Unknown | - | - | government contract suppliers |
| iShephard | Unknown | - | - | government contract suppliers |
| ISL CONSULTING LIMITED | Registered | NZ Limited Company | 3721239 | government contract suppliers |
| Island Shuttle Buses Limited t/a Aotea Car Rentals and Great Barrier Travel | Unknown | - | - | government contract suppliers |
| ISLAND TRADING LIMITED | Removed | NZ Limited Company | 652776 | councillor interest |
| Isle Utilities | Unknown | - | - | government contract suppliers |
| ISLER LIMITED | Registered | NZ Limited Company | 1709389 | government contract suppliers |
