| MARK PETERSEN CONSULTING SERVICES LIMITED | Registered | NZ Limited Company | 7909456 | |
| MARK RAYMOND BROWN PROPERTIES LIMITED | Registered | NZ Limited Company | 7885419 | |
| MARK REED CO LIMITED | Registered | - | - | |
| MARK ROADS LIMITED | Registered | NZ Limited Company | 2338538 | government contract suppliers |
| Mark Tamura | Unknown | - | - | government contract suppliers |
| Mark Three Limited | Unknown | - | - | government contract suppliers |
| MARK WOOFE ELECTRICAL LIMITED | Registered | NZ Limited Company | 1421123 | government contract suppliers |
| MARK WORBOYS TRANSPORT LIMITED | Registered | NZ Limited Company | 1449882 | government contract suppliers |
| MARKET ECONOMICS LIMITED | Registered | NZ Limited Company | 1165166 | government contract suppliers |
| MARKETING IMPACT LIMITED | Registered | NZ Limited Company | 33892 | government contract suppliers |
| MARKHAM DISTRIBUTING LIMITED | Registered | NZ Limited Company | 923474 | government contract suppliers |
| MARLBOROUGH AIRPORT LIMITED | Registered | NZ Limited Company | 517274 | councillor interest |
| Marlborough Associated Modellers | Registered | Incorporated Society | - | councillor interest |
| Marlborough Boys' College | Registered | Education | - | corporate donations |
| Marlborough Chamber of Commerce | Unknown | - | - | corporate donations |
| Marlborough Civic Theatre Trust Appointments Committee | Unknown | - | - | councillor interest |
| Marlborough Community Gardens | Registered | Charitable Trust | - | councillor interest |
| Marlborough District Brass Band | Registered | Incorporated Society | - | councillor interest |
| Marlborough Environment Awards Trust | Unknown | - | - | councillor interest |
| Marlborough Four Paws | Registered | Charitable Trust | - | corporate donations |
| Marlborough Girls College | Registered | Education | - | corporate donations |
| Marlborough Harness Racing | Registered | Incorporated Society | - | councillor interest |
| Marlborough Housing for the Elderly Trust | Unknown | - | - | councillor interest |
| Marlborough Kaikōura Trail Trust | Registered | Charitable Trust | - | kanoa recipients |
| Marlborough Living Cultural Treasure Committee | Unknown | - | - | councillor interest |
| Marlborough Pacific Trust | Registered | Charitable Trust | - | government contract suppliers |
| Marlborough Primary Health Organisation | Unknown | - | - | councillor interest |
| Marlborough Regional Forestry Joint Committee | Unknown | - | - | councillor interest |
| Marlborough Regional Forestry Joint Committee with Kaikōura District Council | Unknown | - | - | councillor interest |
| Marlborough Research Centre Trust | Registered | Charitable Trust | - | kanoa recipients |
| Marlborough Rural Education Activities Programme (REAP) Inc | Registered | Incorporated Society | - | government contract suppliers |
| Marlborough Sounds Restoration Trust | Registered | Charitable Trust | - | councillor interest |
| Marlborough Wine & Food Festival | Removed | Incorporated Society | - | corporate donations |
| Marlborough Youth Trust Incorporated | Unknown | - | - | government contract suppliers |
| MARLOES CONSULTING GROUP LIMITED | Registered | NZ Limited Company | 8589806 | government contract suppliers |
| MARR ELECTRICAL & REFRIGERATION LIMITED | Registered | NZ Limited Company | 536870 | government contract suppliers |
| MARRA CONSTRUCTION (2004) LIMITED | Registered | NZ Limited Company | 1587367 | government contract suppliers |
| MARS PROJECT LIMITED | Registered | NZ Limited Company | 8191175 | councillor interest |
| MARSDEN DEVELOPMENTS LIMITED | Removed | NZ Limited Company | 976518 | kanoa recipients |
| MARSH LIMITED | Registered | NZ Limited Company | 15733 | government contract suppliers |
| Marsh Valuations | Unknown | - | - | government contract suppliers |
| MARSHALL DAY ACOUSTICS LIMITED | Registered | NZ Limited Company | 1053442 | government contract suppliers |
| MARSHALL INDUSTRIES LIMITED | Removed | NZ Limited Company | 257980 | government contract suppliers |
| Marshland Hall Trust | Unknown | - | - | councillor interest |
| Marshlands Hall Trust | Registered | Charitable Trust | - | councillor interest |
| MARTEN BAKKER TIMBERS LIMITED | Registered | NZ Limited Company | 101606 | political donors |
| MARTIN BEVERIDGE LIMITED | Registered | NZ Limited Company | 405108 | government contract suppliers |
| MARTIN ENGINEERING (PN) LIMITED | Registered | NZ Limited Company | 1260897 | government contract suppliers |
| MARTIN JENKINS REAL ESTATE LIMITED | Removed | NZ Limited Company | 1918201 | government contract suppliers |
| MARTIN LYNCH CONSULTING LIMITED | Registered | NZ Limited Company | 2450059 | government contract suppliers |
