| MARTIN, JENKINS & ASSOCIATES LIMITED | Registered | NZ Limited Company | 919665 | government contract suppliers |
| Martinborough Dark Sky Incorporated | Registered | Incorporated Society | - | kanoa recipients |
| MARTINJENKINS HOLDINGS LIMITED | Removed | NZ Limited Company | 6259447 | government contract suppliers |
| MARTINUS RAIL NZ LIMITED | Registered | NZ Limited Company | 6014070 | government contract suppliers |
| Martinus Rail Pty Limited | Unknown | - | - | government contract suppliers |
| MARTON AND DISTRICTS BUDGET SERVICE INCORPORATED | Registered | Incorporated Society | - | government contract suppliers |
| MARTON PRINTERY LIMITED | Removed | NZ Limited Company | 34261 | councillor interest |
| Marton RSA Commemorative Activities | Unknown | - | - | councillor interest |
| Maru Energy Trust | Registered | Charitable Trust | - | councillor interest |
| MARU TRUSTEE LIMITED | Registered | NZ Limited Company | 1794182 | councillor interest |
| Maru Whakatipua | Unknown | - | - | iwi subsidiaries |
| MARUEHI FISHERIES LIMITED | Registered | NZ Limited Company | 1862422 | iwi subsidiaries |
| Marutūāhu Rōpū Limited Partnership | Unknown | - | - | iwi subsidiaries |
| Mary Ann Mitchell | Unknown | - | - | government contract suppliers |
| Mary Bennett | Registered | Sole Trader | - | government contract suppliers |
| MARY BROWN NOMINEES LIMITED | Removed | NZ Limited Company | 2210118 | |
| MARYPORT INVESTMENTS LIMITED | Registered | NZ Limited Company | 2178181 | councillor interest |
| MASH TRUSTEES LIMITED | Registered | NZ Limited Company | 6414093 | government contract suppliers |
| MASKELL PRODUCTIONS LIMITED | Registered | NZ Limited Company | 74493 | government contract suppliers |
| MASON CONTRACTORS LIMITED | Registered | NZ Limited Company | 4169818 | government contract suppliers |
| MASON ENGINEERS (N.Z.) LIMITED | Registered | NZ Limited Company | 420223 | government contract suppliers |
| Masons Engineers (NZ) Ltd | Unknown | - | - | government contract suppliers |
| MASSEY UNIVERSITY AVIATION LIMITED | Removed | NZ Limited Company | 460615 | government contract suppliers |
| MASTA MAINTENANCE SERVICES (NZ) LIMITED | In Liquidation | NZ Limited Company | 615774 | government contract suppliers |
| MASTER BUSINESS SYSTEMS LIMITED | Removed | NZ Limited Company | 663867 | government contract suppliers |
| Mastercard Incorporated Class A | Unknown | - | - | mp interest |
| MASTERCARD NEW ZEALAND LIMITED | Registered | NZ Limited Company | 1893982 | mp interest |
| MASTERLINK LIMITED | Registered | NZ Limited Company | 1188641 | councillor interest |
| Masterton Community Trust | Unknown | - | - | mp interest |
| MASTERY SCHOOLS NEW ZEALAND LIMITED | Registered | NZ Limited Company | 9090352 | government contract suppliers |
| Mat Collins | Unknown | - | - | government contract suppliers |
| Mataatua Quota Ace Holdings Company Limited | Unknown | - | - | iwi subsidiaries |
| MATADA RESEARCH GROUP LIMITED | Registered | NZ Limited Company | 8128427 | government contract suppliers |
| Matahiwi Marae | Unknown | - | - | corporate donations |
| MATAHIWI VINEYARD LIMITED | Registered | - | - | |
| matai medical resarch insitute | Unknown | - | - | government contract suppliers |
| MATAI MEDICAL RESEARCH INSTITUTE LIMITED | Removed | NZ Limited Company | 6255521 | kanoa recipients |
| MATAKANUI DEVELOPMENT COMPANY LIMITED | Registered | NZ Limited Company | 1182061 | councillor interest |
| MATAKANUI STATION LIMITED | Registered | NZ Limited Company | 145693 | councillor interest |
| Matakite Online Trust of New Zealand | Registered | Charitable Trust | - | councillor interest |
| Matamata Household Budget Advisory Service | Registered | Incorporated Society | - | government contract suppliers |
| Matamata-Piako District Council | Registered | Local Government | - | councillor interest |
| MATANGI MOTORS LIMITED | Registered | NZ Limited Company | 1794126 | government contract suppliers |
| Mataoak Trust | Unknown | - | - | councillor interest |
| MATAPIKO TRUSTEES LIMITED | Registered | NZ Limited Company | 9253330 | councillor interest |
| MATAPUNA TRUSTEES LIMITED | Registered | NZ Limited Company | 8491753 | kanoa recipientsgovernment contract suppliers |
| MATARANGI BEACH LIMITED | Registered | NZ Limited Company | 2070769 | corporate donations |
| Matarangi Horticulture Limited Partnership | Registered | Limited Partnership (NZ) | - | kanoa recipients |
| Matarau B7 | Unknown | - | - | councillor interest |
| Matariki Festival – Tūturu Charitable Trust | Unknown | - | - | corporate donations |
