| Mission Mentoring Limited | Other services | 2024 |
| Mission Monitor Ltd | Other services | 2021 |
| Misty Handymen Limited | Construction | 2024 |
| MJT Contracting (UK) Ltd. | Construction | 2010 |
| MJT Management Ltd | Construction | 2017 |
| MJT Property Services Ltd | Households | 2020 |
| MLG Project Management Limited | Construction | 2013 |
| Mmyd Holdings Limited | Financial services | 2023 |
| Mobilemotors.Tv Limited | Information & communication | 2006 |
| Mojow Limited | Professional & scientific | 2018 |
| Monkey Brewhouse (Lymington) Ltd | Manufacturing | 2021 |
| Monkey Brewhouse Limited | Hospitality | 2018 |
| Montagu Arms Hotel (Beaulieu) Limited | Hospitality | 1978 |
| Monty Bella Limited | Administrative & support | 2011 |
| Moonshack Limited | Wholesale & retail | 2024 |
| Moosesoft Limited | Information & communication | 2001 |
| Moot Management Ltd | Real estate | 2024 |
| Morgan Building Design Ltd | Professional & scientific | 2020 |
| Morse Associates Limited | Professional & scientific | 2016 |
| Mortgage Banc Limited | Professional & scientific | 2007 |
| Moulang Property Management Ltd | Real estate | 2024 |
| Moulson Media Ltd | Information & communication | 2024 |
| Move IT New Forest Limited | Transport & logistics | 2020 |
| Moved Ltd | Extraterritorial | 2021 |
| Moveswithmol Ltd | Education | 2026 |
| Moyles GAS Care Limited | Other services | 2006 |
| Mprf Limited | Wholesale & retail | 2021 |
| Mtemc Ltd | Households | 2025 |
| Mudeford Bay Ltd | Hospitality | 2018 |
| Mulberry House Lymington Limited | Households | 2003 |
| Murray's (Stationers) Limited | Real estate | 1974 |
| Muse and MOI Ltd | Wholesale & retail | 2023 |
| Musketeer Lets Ltd | Hospitality | 2025 |
| My Future Health Ltd | Health & social care | 2025 |
| Mycroft Developments Limited | Real estate | 2019 |
| Mycroft Enterprises Limited | Construction | 2019 |
| MYD Corporate Trustee Limited | Financial services | 2025 |
| MYD Group Limited | Financial services | 2025 |
| N C Harvey Ltd | Agriculture & fishing | 2012 |
| N G Cars Limited | Manufacturing | 2002 |
| N T Contractors Limited | Construction | 2013 |
| Nager Invest Limited | Extraterritorial | 2007 |
| Nager Limited | Extraterritorial | 2007 |
| Naked JAM Ltd | Manufacturing | 2013 |
| Nanogen Limited | Manufacturing | 2023 |
| Nantucket Beach House Limited | Wholesale & retail | 2022 |
| Nash Barber Ltd | Other services | 2025 |
| Nationwide Container Conversions Ltd | Construction | 2025 |
| Navarino Court Management Company Limited | Hospitality | 1994 |
| Neal Scanlan Studio Limited | Information & communication | 1996 |
| Neat Hair Ltd | Other services | 2025 |
| Needles EYE Cafe Limited | Hospitality | 2012 |
| Needles Point Management Company Limited | Households | 1979 |
| Neil Evans Composites Ltd | Manufacturing | 2017 |
| Network Safety Netting Limited | Construction | 2024 |
| Neuro Function Ltd | Health & social care | 2025 |
| Neuro Inclusive Coaching Ltd | Professional & scientific | 2026 |
| New Breeze Invest Ltd | Wholesale & retail | 2024 |
| New Forest and Dorset Brides Ltd | Wholesale & retail | 2014 |
| New Forest Art and Design Limited | Arts & recreation | 2016 |
| New Forest Aviation Services Limited | Extraterritorial | 1958 |
| New Forest Building Solutions Limited | Extraterritorial | 2012 |
| New Forest Business Partnership Community Interest Company | Administrative & support | 2020 |
| New Forest Cleaning Ltd | Administrative & support | 2024 |
| New Forest Community Rail Partnership CIC | Transport & logistics | 2026 |
| New Forest Cooling Ltd | Manufacturing | 2015 |
| New Forest Craft Distillery Ltd | Manufacturing | 2019 |
| New Forest Creative Limited | Other services | 2018 |
| New Forest Decking and Landscaping Ltd | Administrative & support | 2023 |
| New Forest Escapes Limited | Hospitality | 2016 |
| New Forest Escargots Ltd | Agriculture & fishing | 2020 |
| New Forest Events Ltd | Hospitality | 2023 |
| New Forest Fast Food Ltd | Hospitality | 2026 |
| New Forest Financial Ltd | Financial services | 2020 |
| New Forest Financial Wills Ltd | Financial services | 2023 |
| New Forest HCW Ltd | Other services | 2021 |
| New Forest Hideaways.Com Ltd | Administrative & support | 2017 |
| New Forest Home Management Limited | Other services | 2017 |
| New Forest Homecare Limited | Health & social care | 2004 |
| New Forest HR and Business Services Limited | Administrative & support | 2017 |
| New Forest Ice Cream Group Limited | Professional & scientific | 2024 |
| New Forest Ice Cream Limited | Manufacturing | 1990 |
| New Forest Interiors (Lymington) Limited | Manufacturing | 2012 |
| New Forest Lettings Ltd | Real estate | 2020 |
| New Forest Lofts Ltd | Construction | 2015 |
| New Forest Master Thatchers Limited | Construction | 2005 |
| New Forest Media Ltd | Administrative & support | 2015 |
| New Forest Online Limited | Information & communication | 2019 |
| New Forest Primary Care Network Limited | Health & social care | 2022 |
| New Forest Produce Limited | Wholesale & retail | 2004 |
| New Forest Property Care Ltd. | Construction | 2010 |
| New Forest Property Group Ltd | Real estate | 2021 |
| New Forest Property Management Ltd | Real estate | 2023 |
| New Forest Reiki Limited | Other services | 2023 |
| New Forest Security Limited | Administrative & support | 1997 |
| New Forest Self Storage Ltd | Transport & logistics | 2013 |
| New Forest Sips Ltd | Construction | 2012 |
| New Forest Sports Massage Ltd | Health & social care | 2017 |
| New Forest Technology Services Ltd | Information & communication | 2023 |
| New Forest Tennis Courts Ltd | Construction | 2015 |