| M Coupland Properties Ltd | Real estate | 2026 |
| M Jackson Plumbing & Heating Limited | Construction | 2015 |
| MAC Aviation Consultancy Services Limited | Transport & logistics | 2000 |
| Macnab Financial Services Ltd | Financial services | 2019 |
| Maeve House Management Company Limited | Households | 2021 |
| Magnacourt Ltd | Construction | 1997 |
| Magnusson Analytica Ltd | Information & communication | 2022 |
| Mallorie Estates Limited | Real estate | 2007 |
| Manitou Finance Limited | Financial services | 1988 |
| Manitou PS UK Limited | Wholesale & retail | 2019 |
| Mantis Marine Ltd | Manufacturing | 2019 |
| Manutan UK Limited | Wholesale & retail | 1973 |
| Marchwood Integrated Limited | Manufacturing | 2009 |
| Marchwood Safety Limited | Professional & scientific | 2018 |
| Mark Lichtensteiger Ltd | Wholesale & retail | 2024 |
| Marriotts of Dorset Limited | Wholesale & retail | 2022 |
| Marshway Contracts Limited | Construction | 2016 |
| Martha Brook Ltd | Arts & recreation | 2013 |
| Martin John Training Limited | Professional & scientific | 2022 |
| Mascot Risk Ltd. | Other services | 2012 |
| Matt Adkins at Glass Relief Ltd | Arts & recreation | 2021 |
| Mcpherson Homes Limited | Real estate | 2017 |
| MDS Sport Limited | Professional & scientific | 2011 |
| Melbury Kitchens & Interiors Limited | Manufacturing | 2025 |
| Memorysmith Computing Ltd | Information & communication | 2016 |
| Mendit Limited | Households | 2022 |
| Meriton Court Management Limited | Households | 1988 |
| MJH Aviation Limited | Manufacturing | 2025 |
| Mjrt Solutions Limited | Information & communication | 2015 |
| MKT Cleaning Ltd | Administrative & support | 2023 |
| MM Tree Services Ltd | Agriculture & fishing | 2025 |
| Modulek Limited | Construction | 2010 |
| Monditalia Limited | Wholesale & retail | 2025 |
| Moondance Freehold Limited | Households | 2014 |
| Moorlands (Verwood) Management Company Limited | Households | 1999 |
| Multilink Access Control Systems Ltd | Manufacturing | 2002 |
| MW Cooling Ltd | Professional & scientific | 2026 |
| Mydiscocard Ltd | Other services | 2023 |
| N Roberts & Sons Ltd | Real estate | 2024 |
| Nangua Limited | Health & social care | 2012 |
| Navier Court (Management Company) Limited | Households | 2006 |
| Naviho Ltd | Hospitality | 2023 |
| Nela Homes Burgate Limited | Construction | 2024 |
| Nela Homes Ltd | Financial services | 2023 |
| Neoform 3D Limited | Wholesale & retail | 2024 |
| Nestd Capital Ltd | Real estate | 2022 |
| Nestd Kitchens (Bournemouth) Ltd | Real estate | 2022 |
| Newgate Lodge Freehold Limited | Households | 2024 |
| Nicholas Smith International Limited | Information & communication | 1966 |
| Noel Smith Consultants Limited | Professional & scientific | 2025 |
| Norander Limited | Information & communication | 2025 |
| NOT Really in Default at ALL Limited | Information & communication | 1986 |
| O'Brien Systems Ltd | Information & communication | 2008 |
| Odea Air Limited | Energy | 2016 |
| Only Bespoke Limited | Information & communication | 2014 |
| Optybose Ltd | Public administration | 2019 |
| Opus UK Binding & Foiling Ltd | Manufacturing | 2008 |
| Orbell Notary Services Ltd | Professional & scientific | 2019 |
| Orchard Nursery (Verwood) Limited | Education | 2005 |
| Overwatch Security Services Limited | Administrative & support | 2015 |
| Paba Group Limited | Financial services | 2026 |
| Palmer Wessex Limited | Professional & scientific | 2002 |
| Park Towers RTM Company Ltd | Real estate | 2010 |
| Parkhead Taxis Limited | Other services | 2005 |
| Parklands Management Company (Bournemouth) Limited | Households | 1997 |
| Parrot Wireless Limited | Manufacturing | 2023 |
| Party Promotions Ltd | Administrative & support | 2025 |
| Pathway (Martello) Limited | Construction | 2021 |
| Pathway Construction Limited | Construction | 2015 |
| Pathway Developments Limited | Construction | 2008 |
| Pathway Developments Number 2 Limited | Construction | 2013 |
| Pathway GA Limited | Construction | 2018 |
| Pathway Manor Close Limited | Real estate | 2019 |
| Pelham Court (Branksome Park) Limited | Households | 1964 |
| Petit Pebbles Deli Limited | Wholesale & retail | 2014 |
| PGS Limited | Construction | 2026 |
| Phat George Ltd | Wholesale & retail | 2018 |
| Phillipson-Masters Builders Ltd. | Construction | 2015 |
| Phoenix Automotive Technologies Limited | Wholesale & retail | 2018 |
| Phoenix Court Freehold Limited | Households | 2021 |
| Pilgrim Films Limited | Information & communication | 2008 |
| Pioneering Performance Ltd | Wholesale & retail | 2016 |
| Plastic Filters Limited | Financial services | 2012 |
| Plumbing, Heating & Drainage Ltd | Construction | 2015 |
| Plumley Property Limited | Construction | 2025 |
| Polygon Consulting Limited | Professional & scientific | 2005 |
| Position Sensors Limited | Manufacturing | 2003 |
| Potters Place Limited | Households | 2020 |
| Premier Engraving Services Limited | Administrative & support | 2004 |
| Premier Exterior Property Maintenance Ltd | Construction | 2023 |
| Print Dimensions Limited | Administrative & support | 2007 |
| Priory Mews (Christchurch) Management Company Limited | Households | 2008 |
| Pro Security Systems Limited | Construction | 2003 |
| Project Management Information Technology Limited | Extraterritorial | 2007 |
| Property Solutions (Southern) Limited | Real estate | 2007 |
| Prostream Drainage Ltd | Water & waste | 2026 |
| Pterinos Ltd | Transport & logistics | 2020 |
| Quality Assured Plastics Limited | Extraterritorial | 1988 |
| Queenan Consulting Ltd | Professional & scientific | 2013 |
| R and J Decorating Solutions Ltd | Construction | 2024 |