| Holly Hill Properties Limited | Real estate | 2017 |
| Horwill Carne Developments Limited | Construction | 2017 |
| IAN Mills Golf Limited | Wholesale & retail | 2012 |
| IAN Trow Tech Limited | Professional & scientific | 2017 |
| Ibis Properties (Hampshire) Limited | Construction | 1972 |
| IC43 Limited | Professional & scientific | 2020 |
| Idgateway Limited | Information & communication | 2012 |
| Innovis Consulting Limited | Professional & scientific | 2020 |
| Insight EYE Surgeons LLP | | 2008 |
| Inter-Minerals GB Limited | Transport & logistics | 2019 |
| Internet Consultants and Associates Ltd | Information & communication | 2011 |
| Iron Hill Building, Conservation & Restoration Limited | Construction | 2017 |
| J N Landscapes Limited | Construction | 1985 |
| J W Roberts Plumbing & Heating Limited | Construction | 2008 |
| J. & J. Conversions Limited | Manufacturing | 1991 |
| Jambera Holdings Limited | Financial services | 2024 |
| JCT Future Ltd | Financial services | 2024 |
| Jeeves Logistical Services Limited | Administrative & support | 2023 |
| JEM Musselwhite Limited | Professional & scientific | 2015 |
| Jenbul Limited | Professional & scientific | 2000 |
| Jjmb (Langar) Limited | Real estate | 2021 |
| JK Trading (International) Limited | Wholesale & retail | 2018 |
| John M Carter Holdings Limited | Financial services | 2024 |
| John Pyatt Concreting Limited | Wholesale & retail | 1999 |
| Johnsons Generators Limited | Energy | 2015 |
| Judy Sporle Swimming Enterprises Limited | Arts & recreation | 1996 |
| Julian Taylor Design Associates Limited | Professional & scientific | 2011 |
| JWB Marine Limited | Manufacturing | 2026 |
| K H Property Investment Ltd | Construction | 2015 |
| K.N.Mac Limited | Other services | 2012 |
| Kate Halpin Limited | Professional & scientific | 2022 |
| KC Seven Management Limited | Financial services | 2021 |
| Khimera Limited | Professional & scientific | 2010 |
| Kierstone Ltd | Administrative & support | 2020 |
| Kifflands Properties Limited | Construction | 2013 |
| Kingsmead (Chandlers Ford) Limited | Other services | 2013 |
| Kingsway Construction (Southern) Limited | Construction | 2002 |
| Kirkham Property Group Ltd | Financial services | 2024 |
| Lakewood Business Services Limited | Professional & scientific | 2016 |
| LDC Investment Property Limited | Real estate | 2015 |
| Leather Inc Limited | Extraterritorial | 2010 |
| Leros Properties Limited | Real estate | 2019 |
| Little 1 Group Ltd | Financial services | 2025 |
| Little Treasures Gymnastics Limited | Arts & recreation | 2015 |
| Lloyd Link Logistics Limited | Transport & logistics | 2014 |
| Longevity and Lifestyle Medicine Ltd | Health & social care | 2025 |
| Macon Limited | Financial services | 2016 |
| Macra Limited | Real estate | 2016 |
| Maddy Moos Limited | Wholesale & retail | 2016 |
| Manor Marketing (Consultants) Limited | Professional & scientific | 2003 |
| Maritime Safety Advisors Ltd | Professional & scientific | 2026 |
| Mark Davies Associates (Mortgage Consultants) LLP | | 2008 |
| Marksman Consulting LLP | | 2009 |
| Maxtech Coatings Consultancy Ltd | Construction | 2014 |
| MBT Sensors Developments Limited | Financial services | 2011 |
| Mcconnell Construction Holdings Limited | Financial services | 2021 |
| Mcconnell Construction Limited | Construction | 2001 |
| Medinsight AI Ltd | Information & communication | 2024 |
| Meridian Catering Engineers Limited | Manufacturing | 2004 |
| Microlink PC (UK) Limited | Information & communication | 1997 |
| Mike CCW Limited | Professional & scientific | 2016 |
| Mindmojo Limited | Health & social care | 2016 |
| Mitford Consulting Limited | Information & communication | 1997 |
| MJG Build Limited | Manufacturing | 2025 |
| MJG Group Holdings Limited | Financial services | 2025 |
| MJG Mechanical Services Limited | Manufacturing | 2006 |
| Mmyyh West Hampshire Ltd | Real estate | 2022 |
| Modan Carpentry Limited | Construction | 2014 |
| Moonshine Property Investments Limited | Real estate | 2016 |
| Mount Bugle Investments Limited | Agriculture & fishing | 2004 |
| Mourtzoukos EYE Consultants Ltd | Health & social care | 2015 |
| MPS Services Group Limited | Administrative & support | 2022 |
| MRH Properties South Ltd | Real estate | 2025 |
| MSC Consulting Services Ltd | Professional & scientific | 2024 |
| Music Maestros Limited | Education | 2020 |
| Mycoal Warm Packs Limited | Wholesale & retail | 1984 |
| N.A.B.V Limited | Wholesale & retail | 2021 |
| N.M. Plant Hire Ltd. | Construction | 1992 |
| N3 Hospitality Management Ltd | Hospitality | 2026 |
| Nathaniel Limited | Information & communication | 2023 |
| Nest EGG Property Developments Limited | Construction | 2004 |
| Nest EGG Property Investments Limited | Real estate | 2003 |
| Neurosynapse Limited | Information & communication | 2015 |
| New Forest Independent Services Limited | Real estate | 2012 |
| New Forest Technical Services Limited | Professional & scientific | 2018 |
| New Span Holdings Limited | Professional & scientific | 2004 |
| Newspan (UK) Ltd | Construction | 2024 |
| Newspan Building Solutions Limited | Construction | 2008 |
| Newspan Group Ltd | Construction | 2024 |
| Nightingale Nursery Ltd | Agriculture & fishing | 2019 |
| NML Contracts Ltd | Construction | 2020 |
| NO.1 the Square (Wickham) Limited | Hospitality | 2009 |
| North Wilts Border PCN Limited | Health & social care | 2023 |
| Nutland Carpet Accessories Limited | Wholesale & retail | 1973 |
| Oakleaf Carpentry Limited | Construction | 2009 |
| Occupational Physicians in Wessex Ltd | Health & social care | 2016 |
| One Vision Signs Ltd | Manufacturing | 2011 |
| Ontology-Partners Limited | Information & communication | 2006 |
| Onyx Creative Solutions Limited | Professional & scientific | 2016 |
| Orbis Business International Limited | Professional & scientific | 2010 |