| Jalee First AID Training Ltd | Education | 2017 |
| Jani-Jack Limited | Professional & scientific | 2004 |
| JGL Electrical Services Ltd | Construction | 2021 |
| JLA Morgan Limited | Professional & scientific | 2026 |
| JLS Heating & Electrical Ltd | Construction | 2015 |
| John Burton RAE Ltd | Manufacturing | 2013 |
| Jordans Cafe LLP | | 2018 |
| Journey's END Films Ltd | Information & communication | 2014 |
| JWH Accountancy Solutions Limited | Professional & scientific | 2026 |
| Kadopa Limited | Wholesale & retail | 2009 |
| KB Healthbase Ltd | Health & social care | 2021 |
| Kelvin Cave Limited | Wholesale & retail | 1983 |
| Kelways Plants Limited | Agriculture & fishing | 2007 |
| Koolbardi Ltd | Professional & scientific | 2021 |
| Korber and Clarke Consultancy Limited | Financial services | 2015 |
| Kpmg Properties Limited | Real estate | 1998 |
| KS Champion Ltd | Administrative & support | 2026 |
| L.W. Smart Properties Ltd | Real estate | 2025 |
| Landbank (South West) Limited | Real estate | 2013 |
| Langport Veterinary Centre Limited | Professional & scientific | 2015 |
| Lantopia Limited | Administrative & support | 2019 |
| Larkmans Limited | Wholesale & retail | 2000 |
| LAT Accounting Limited | Professional & scientific | 2011 |
| Link Property Management Services Ltd | Construction | 2017 |
| Lisona Court Management Company Limited | Real estate | 2018 |
| Little P'S Treat Boxes Ltd | Wholesale & retail | 2023 |
| Little Upton Limited | Real estate | 2019 |
| Live Neutral Earth Ltd | Construction | 2010 |
| Lmsh Ltd | Professional & scientific | 2026 |
| Long Sutton Golf and Country Club Limited | Arts & recreation | 2016 |
| LS Algo Trading Ltd | Administrative & support | 2020 |
| LS Tech Industries Ltd | Administrative & support | 2020 |
| Lubrisolve Engineering Solutions Limited | Wholesale & retail | 2003 |
| Lucy Jorge Limited | Other services | 2020 |
| Make Skincare Ltd. | Manufacturing | 2012 |
| Mamyo Ltd. | Construction | 2011 |
| Maples Ltd | Professional & scientific | 2021 |
| Mark Salway Ltd | Professional & scientific | 2026 |
| Marlow Computer Services Limited | Information & communication | 1996 |
| Matt Geen Consulting Ltd | Information & communication | 2011 |
| Maximise (South West) Ltd | Education | 2016 |
| Maximise Health Ltd | Health & social care | 2022 |
| Mcpurkie Investments Ltd | Real estate | 2022 |
| Melanie Hall Design Limited | Professional & scientific | 2017 |
| Melissa Charlotte Louise Fairley Ltd | Other services | 2024 |
| Merrigan Properties Limited | Real estate | 2018 |
| Metford J Stevens Limited | Agriculture & fishing | 2005 |
| Mgcbros Limited | Real estate | 2018 |
| Midlane Limited | Professional & scientific | 1997 |
| Mike Gardiner Construction Ltd | Construction | 2014 |
| Military Aircraft Support Limited | Wholesale & retail | 2015 |
| Millhouse South West Limited | Construction | 2005 |
| Mister T Property Limited | Real estate | 2016 |
| Mitchell Building Yeovil Limited | Construction | 2005 |
| MLB Digital Solutions Ltd | Information & communication | 2014 |
| MO Icebaths Limited | Manufacturing | 2024 |
| Montpelier Architectural Designs Ltd | Professional & scientific | 2023 |
| Moonway Services Limited | Transport & logistics | 2000 |
| Mountains GOT ME High Ltd | Wholesale & retail | 2023 |
| MR Hotels UK Limited | Hospitality | 2012 |
| MRL Aviation Limited | Manufacturing | 2025 |
| Mtwf Ltd | Manufacturing | 2010 |
| Muchelney Forge Studios Limited | Manufacturing | 2015 |
| N & J Agriculture Ltd | Agriculture & fishing | 2010 |
| N & N J Farriers Ltd. | Agriculture & fishing | 2002 |
| N.Duckett Property Ltd | Real estate | 2023 |
| Natural Biotech Limited | Manufacturing | 2023 |
| Naturita Ltd | Wholesale & retail | 2013 |
| Neovisus Ltd | Information & communication | 2023 |
| Newmanors Limited | Administrative & support | 1984 |
| Nick Godfrey Consulting Ltd | Professional & scientific | 2026 |
| Nigel Bunce Master Thatcher Limited | Construction | 2013 |
| Nlnd Ltd | Agriculture & fishing | 2019 |
| Norcourt Residents Company Limited | Households | 1998 |
| Norton House Langport Limited | Real estate | 2022 |
| NRJ SW Ltd | Manufacturing | 2022 |
| O2I Design Limited | Construction | 2007 |
| Old Oak Farm Limited | Hospitality | 2015 |
| OM Turm Limited | Wholesale & retail | 2024 |
| Omnia Bathrooms Limited | Wholesale & retail | 2012 |
| Onegraydot Limited | Arts & recreation | 2017 |
| Onsolar Ltd | Wholesale & retail | 2004 |
| Orbit Digital Ltd | Wholesale & retail | 2026 |
| Orchard Facilities Ltd | Extraterritorial | 2022 |
| Orchid Inns Limited | Hospitality | 2004 |
| P&M Limited | Extraterritorial | 1999 |
| Parental Holdings Ltd | Financial services | 2024 |
| Park Lane Holiday Lets Limited | Hospitality | 2025 |
| Passmores Limited | Wholesale & retail | 2003 |
| Pathway Enterprises Ltd | Administrative & support | 2008 |
| Pauls Promotions Ltd | Wholesale & retail | 2015 |
| PAW Play Ltd. | Other services | 2014 |
| Payroll Partners 365 Ltd | Professional & scientific | 2011 |
| Perception Matters Limited | Professional & scientific | 2005 |
| Pinkings Cleugh Limited | Extraterritorial | 2010 |
| Pintail Investments Limited | Real estate | 2025 |
| Planit Future Financial Limited | Financial services | 2021 |
| Principal Protection Ltd | Other services | 2021 |
| Private Peaceful Productions Limited | Information & communication | 2011 |
| Protile (SW) Ltd | Construction | 2015 |