| MCM CONTRACTING LIMITED | Registered | NZ Limited Company | 1616550 | government contract suppliers |
| MCMAHON SERVICES NEW ZEALAND LIMITED | Registered | NZ Limited Company | 6884693 | government contract suppliers |
| MCMASTER ENGINEERING LIMITED | Registered | NZ Limited Company | 1192113 | kanoa recipients |
| MCMILLAN & LOCKWOOD (PN) LIMITED | Registered | NZ Limited Company | 420281 | government contract suppliers |
| MCMILLAN & LOCKWOOD CENTRAL LIMITED | Registered | NZ Limited Company | 3954740 | government contract suppliers |
| MCMILLAN & LOCKWOOD LIMITED | Removed | NZ Limited Company | 6755 | government contract suppliers |
| McMillan and Lockwood Limited | Unknown | - | - | government contract suppliers |
| MCMILLAN DRILLING LIMITED | Registered | NZ Limited Company | 140391 | government contract suppliers |
| McMillan Drilling NI Ltd | Unknown | - | - | government contract suppliers |
| mcmillan woods nz | Unknown | - | - | charity service providers |
| McMillian & Lockwood | Unknown | - | - | government contract suppliers |
| MCMLXX LIMITED | In Receivership and in Liquidation | NZ Limited Company | 8264965 | councillor interest |
| MCMONAGLE HERITAGE FARMS LIMITED | Registered | NZ Limited Company | 8523186 | councillor interest |
| MCMULLEN & WING LIMITED | Registered | NZ Limited Company | 530427 | government contract suppliers |
| MCNATTY CONSTRUCTION LIMITED | Registered | NZ Limited Company | 2060776 | government contract suppliers |
| MCPHAIL BROS LIMITED | Registered | NZ Limited Company | 1821683 | councillor interest |
| MD Building Otago Limited | Unknown | - | - | government contract suppliers |
| MD CONSTRUCTION LIMITED | Registered | NZ Limited Company | 2270732 | government contract suppliers |
| MD Evans FT | Unknown | - | - | councillor interest |
| MDC HOLDINGS LIMITED | Registered | NZ Limited Company | 814159 | councillor interest |
| MDM Entertainment Pty Ltd | Unknown | - | - | government contract suppliers |
| MDR SOUND & LIGHTING LIMITED | Registered | NZ Limited Company | 1397040 | government contract suppliers |
| ME ACCOUNTANTS LIMITED | Registered | NZ Limited Company | 7295336 | councillor interest |
| MEADOW SOUNDS LIMITED | Registered | NZ Limited Company | 8162845 | councillor interest |
| MEASUREUP FLOORING LIMITED | Registered | NZ Limited Company | 6257070 | government contract suppliers |
| Meat the Need | Registered | Charitable Trust | - | government contract suppliers |
| Medacs JHealthcare | Unknown | - | - | government contract suppliers |
| MedApps Pty Ltd | Unknown | - | - | government contract suppliers |
| Medartis Australia and New Zealand Pty Ltd | Unknown | - | - | government contract suppliers |
| MEDBASE LIMITED | Registered | NZ Limited Company | 6091949 | councillor interest |
| MEDBURY FARM LIMITED | Registered | NZ Limited Company | 1159056 | councillor interest |
| MEDBURY IRRIGATION LIMITED | Registered | NZ Limited Company | 4222439 | councillor interest |
| MEDCALL HEALTH PERSONNEL (NZ) LIMITED | Registered | NZ Limited Company | 6285200 | government contract suppliers |
| MEDI-MAP LIMITED | Registered | NZ Limited Company | 3983018 | government contract suppliers |
| MEDI'RAY NEW ZEALAND LIMITED | Registered | NZ Limited Company | 4859680 | government contract suppliers |
| MEDIA DESIGN SCHOOL AT STRAYER LIMITED | Registered | NZ Limited Company | 326111 | government contract suppliers |
| MEDIA SOUTH LIMITED | Registered | - | - | |
| Media South Ltd; One Two Media Ltd; Real Wifi Ltd | Unknown | - | - | councillor interest |
| Mediation Partners | Registered | Sole Trader | - | government contract suppliers |
| Mediation Succession | Unknown | - | - | councillor interest |
| MEDIAWORKS HOLDINGS LIMITED | Unknown | - | - | nzbn trace |
| MEDIAWORKS OUTDOOR HOLDINGS LIMITED | Registered | NZ Limited Company | - | government contract suppliers |
| Mediaworks TV | Unknown | - | - | government contract suppliers |
| MEDIC ALERT ALARMS NEW ZEALAND LIMITED | Removed | NZ Limited Company | 1149186 | councillor interest |
| Medical Funds Management Limited Pelorus River Trust | Unknown | - | - | mp interest |
| Medical Insurance Costs (payment for Role As Trustee) | Unknown | - | - | mp interest |
| Medical Kiwi ltd | Unknown | - | - | councillor interest |
| MEDICAL LAND HOLDINGS LIMITED | Registered | NZ Limited Company | 7833276 | kanoa recipients |
| Medical Technologies Australia | Unknown | - | - | government contract suppliers |
| MEDIFAB LIMITED | Registered | NZ Limited Company | 4464738 | government contract suppliers |