| Morris SOT Limited | Wholesale & retail | 1998 |
| MOS Management Services Limited | Professional & scientific | 2008 |
| Motex Solutions Ltd | Professional & scientific | 2026 |
| Motto Automotive Ltd | Other services | 2019 |
| Mount Pleasant (Mudeford) Management Company Limited | Households | 2016 |
| Move on Rentals Limited | Real estate | 2010 |
| MP Takeaway Ltd | Hospitality | 2021 |
| MRM Property Investments Limited | Real estate | 2022 |
| Mspt Investments Holdings Limited | Financial services | 2022 |
| Mtech Communications Limited | Information & communication | 2018 |
| Muckers Cafe Ltd | Hospitality | 2025 |
| MUD Huts of Mudeford Limited | Real estate | 1996 |
| Mude Gardens (Maintenance) Limited | Administrative & support | 1967 |
| Mudeford Consultants Ltd | Professional & scientific | 2025 |
| Mudeford Design and Build Limited | Construction | 2021 |
| Mudeford Ferry Limited | Transport & logistics | 2025 |
| Mudeford Lodge Management Ltd | Real estate | 2006 |
| Mudeford Quay Crossfit Ltd | Arts & recreation | 2025 |
| Mudeford Rocks Limited | Hospitality | 2018 |
| Mudeford Wood Community Trust | Arts & recreation | 2011 |
| MUG Shot Coffee Ltd | Manufacturing | 2026 |
| Mullins Independent Social Work Ltd | Health & social care | 2023 |
| Multiroom Sound and Vision Limited | Extraterritorial | 2008 |
| Multitask Engineering Limited | Professional & scientific | 1991 |
| Mutual Real Estate Company Limited | Real estate | 1933 |
| MVP Engineering Services Limited | Administrative & support | 2023 |
| MWA Building Ltd | Construction | 2019 |
| My Financial Planner Ltd | Financial services | 2008 |
| My First Choice Care Limited | Other services | 2023 |
| My Sewing Box Ltd | Wholesale & retail | 2014 |
| My Silk Pillowcase Limited | Wholesale & retail | 2022 |
| MYA Nails Studio Ltd | Other services | 2026 |
| Myddleton Enterprises Limited | Real estate | 2015 |
| Myles Cary Plastering Ltd | Construction | 2023 |
| Mylo Property Investments Limited | Real estate | 2010 |
| Mystaffhq Limited | Administrative & support | 2025 |
| N & C Jarvis Property Limited | Real estate | 2024 |
| N&P Properties (Mudeford) Ltd | Real estate | 2017 |
| N0 18 KS Limited | Hospitality | 2025 |
| Naeo Ltd | Construction | 2018 |
| Naish Caravan Park Limited | Extraterritorial | 1964 |
| Naish Estate (Hoburne) Limited | Hospitality | 1959 |
| Namers Limited | Manufacturing | 1993 |
| Natio Services (Sussex) Limited | Administrative & support | 2010 |
| National Fire Door Inspections Ltd | Public administration | 2021 |
| Natoma Resources Ltd | Information & communication | 2013 |
| Naturetech Designs Limited | Manufacturing | 2018 |
| Ncsn Group Ltd | Extraterritorial | 2024 |
| Ndmm Limited | Real estate | 2010 |
| NDP Holdings Ltd | Construction | 2025 |
| Nest & Home Ltd | Construction | 2024 |
| Nestaway Boats Limited | Manufacturing | 2007 |
| Nestbook.Io Ltd | Information & communication | 2026 |
| Networkhive Ltd | Professional & scientific | 2019 |
| Neutron VR Ltd. | Administrative & support | 2019 |
| Neva Group Ltd | Manufacturing | 2020 |
| New ERA (UK) Limited | Administrative & support | 2011 |
| New Forest Bike Project C.I.C. | Other services | 2016 |
| New Forest Caravans Limited | Extraterritorial | 1966 |
| New Forest Classic Cars Limited | Wholesale & retail | 2011 |
| New Forest Conservation Farming Limited | Agriculture & fishing | 2021 |
| New Forest Crematorium Company Limited | Other services | 2016 |
| New Forest Energy Limited | Agriculture & fishing | 2009 |
| New Forest Mobile Catering Ltd | Hospitality | 2017 |
| New Forest Properties Ltd | Real estate | 2025 |
| New Forest Property Ltd | Real estate | 2022 |
| New Forest Sports Car Hire Limited | Administrative & support | 2019 |
| New Forest Sports Cars Limited | Administrative & support | 2019 |
| New Forest Tea Rooms LLP | | 2012 |
| New Forest Web Design Limited | Information & communication | 2019 |
| New Honeymoon Ltd | Hospitality | 2024 |
| New Horizons Network Ltd | Other services | 2018 |
| New Kebab House Limited | Hospitality | 2024 |
| New Leaf Care Services Ltd | Health & social care | 2022 |
| New Silver Ripple Ltd | Hospitality | 2018 |
| New Start Integration Services Ltd | Administrative & support | 2023 |
| New Thought Training Ltd | Administrative & support | 2009 |
| Newstead Estates Bournemouth Limited | Real estate | 2007 |
| Next GEN Marine Ltd | Education | 2005 |
| NIA Botanica Co Ltd | Wholesale & retail | 2022 |
| Nicholas Waddington & Company Limited | Professional & scientific | 2023 |
| Nightwatcher Limited | Wholesale & retail | 2017 |
| Nimble Europe Limited | | 2007 |
| Nite International Limited | Wholesale & retail | 2009 |
| NO Mediocre Ltd | Construction | 2021 |
| Noble Asset Services Ltd | Households | 2025 |
| Noble Hounds Ltd | Wholesale & retail | 2025 |
| Noblestudios Limited | Professional & scientific | 2014 |
| Nook&Co Ltd | Wholesale & retail | 2023 |
| Nora Research Ltd | Wholesale & retail | 2026 |
| Nordic Damp Proofing Ltd | Construction | 2025 |
| Noreen Investments Limited | Real estate | 1987 |
| Norris Builders (Christchurch) Limited | Construction | 1988 |
| Northstar Christchurch Ltd | Wholesale & retail | 2024 |
| NOT Forgotten Music Ltd | Wholesale & retail | 2020 |
| NOT Just Franchising Limited | Administrative & support | 2018 |
| NOT Just Plumbing Ltd | Construction | 2018 |
| NOT Just Travel (Agency) Limited | Administrative & support | 2005 |
| NOT Just Travel Group Limited | Professional & scientific | 2003 |
| NOT Just Travel Holdings Limited | Financial services | 2023 |