| MEDIQUIP MARKETING LIMITED | Removed | NZ Limited Company | 139322 | government contract suppliers |
| MediRay | Unknown | - | - | government contract suppliers |
| Mediscope International Limited | Unknown | - | - | government contract suppliers |
| MEDIX 21 LIMITED | Registered | NZ Limited Company | 356512 | government contract suppliers |
| Medix21 LTD | Unknown | - | - | government contract suppliers |
| MEDPRO HEALTHCARE (NZ) LIMITED | Removed | NZ Limited Company | 1581647 | government contract suppliers |
| MEDRECRUIT NZ LIMITED | Removed | NZ Limited Company | 1856984 | government contract suppliers |
| MEDSALV LIMITED | Registered | NZ Limited Company | 6600873 | government contract suppliers |
| Medtronic New Zealand Limited | Unknown | - | - | government contract suppliers |
| MEDUSA ENTERPRISES LIMITED | Registered | NZ Limited Company | 4418178 | councillor interest |
| MedXus Limited | Removed | NZ Limited Company | - | government contract suppliers |
| Meescan Inc. | Unknown | - | - | government contract suppliers |
| Meeting Fees, Masterton Community Trust Hon Todd McClay | Unknown | - | - | mp interest |
| Meg Embleton-Muir | Unknown | - | - | government contract suppliers |
| MEGA FORTRIS NEW ZEALAND LIMITED | Registered | NZ Limited Company | 274140 | government contract suppliers |
| MEGEN MCKAY CONSULTING LIMITED | Registered | NZ Limited Company | 8186895 | |
| Meihana Koata Trust | Unknown | - | - | kanoa recipients |
| MEISTER SOLUTIONS LIMITED | Registered | - | - | |
| MEL 2020 LIMITED | Registered | NZ Limited Company | 7846376 | government contract suppliers |
| MEL ROSE PRIVATE CAPITAL LTD. | Unknown | - | - | political donors |
| Melbourne Symphony Orchestra | Unknown | - | - | corporate donations |
| Melfh Family Trust | Unknown | - | - | councillor interest |
| Melissa Farquhar | Unknown | - | - | government contract suppliers |
| MELISSA LEE PRODUCTIONS LIMITED | Removed | NZ Limited Company | 1901279 | |
| Melody Dairies Limited Partnership | Registered | Limited Partnership (NZ) | - | government contract suppliers |
| Melray Electrccal | Unknown | - | - | government contract suppliers |
| MELRAY ELECTRIC LIMITED | Registered | NZ Limited Company | 352754 | government contract suppliers |
| MELVILLE JESSUP WEAVER LIMITED | Registered | NZ Limited Company | 567879 | government contract suppliers |
| MENA INTERNATIONAL LIMITED | Registered | - | - | |
| MENARD OCEANIA PTY LTD | Registered | Overseas ASIC Company | 7451477 | government contract suppliers |
| Mendelson Family Trust | Unknown | - | - | councillor interest |
| MENDOZA LIMITED | Removed | NZ Limited Company | 1081290 | government contract suppliers |
| Mental Health Foundation of New Zealand | Registered | Charitable Trust | - | government contract suppliers |
| MENTAL HEALTH SOLUTIONS LIMITED | Registered | NZ Limited Company | 1281288 | government contract suppliers |
| MENTOA Ltd | Unknown | - | - | government contract suppliers |
| Menu Logistics | Unknown | - | - | government contract suppliers |
| Menz shed Whangamata | Unknown | - | - | councillor interest |
| MENZIES GROUP LIMITED | Registered | NZ Limited Company | 124853 | government contract suppliers |
| Menzshed | Unknown | - | - | councillor interest |
| MenzShed Ōmokoroa | Registered | Incorporated Society | - | councillor interest |
| MenzShed Ōmokoroa, OEMI | Unknown | - | - | councillor interest |
| Meo Rip Curl Pro Portugal | Unknown | - | - | corporate donations |
| MER MEC S.P.A | Registered | Overseas Non-ASIC Company | 8998388 | government contract suppliers |
| Merani Trust via Andrew Bagnall | Unknown | - | - | political donors |
| Merative US L.P. | Unknown | - | - | government contract suppliers |
| MERCEDES-BENZ NEW ZEALAND LIMITED | Registered | NZ Limited Company | 64608 | government contract suppliers |
| Merck Limited | Unknown | - | - | government contract suppliers |
| MERCK SHARP & DOHME (NEW ZEALAND) LIMITED | Registered | NZ Limited Company | 103346 | government contract suppliers |
| merckandmsd | Unknown | - | - | government contract suppliers |
| Mercury Bay Club | Registered | Incorporated Society | - | councillor interest |
