| Local Connections Ltd | Health & social care | 2025 |
| Local Planners Limited | Professional & scientific | 2026 |
| Lochhouse Ltd | Financial services | 2022 |
| Lochindaal Ventures Limited | Real estate | 2002 |
| Lock Tight Storage Ltd | Extraterritorial | 2021 |
| Lockyer’S Field (North Curry) Management Company Limited | Households | 2018 |
| Lodgemark Limited | Real estate | 1999 |
| Loftyjp Limited | Wholesale & retail | 2011 |
| Logan Taunton Ltd | Real estate | 2024 |
| Logistics Design Analytics Ltd | Professional & scientific | 2023 |
| Lomond Consultants Ltd | Information & communication | 2026 |
| London Academy of Medicine Ltd | Education | 2020 |
| London Cromwell Estates Limited | Real estate | 2016 |
| London FMC Limited | Wholesale & retail | 2024 |
| London House (Wiveliscombe) Management Limited | Households | 1984 |
| Long ASH Poultry Limited | Agriculture & fishing | 2025 |
| Long Hazel Lodges Limited | Hospitality | 2006 |
| Longforth Farm Management Company Limited | Households | 2013 |
| Longmoor Farm Limited | Agriculture & fishing | 2014 |
| Longrun Supported Living Limited | Health & social care | 2020 |
| Lonlay Meadow (Stogursey) Management Company Limited | Real estate | 2007 |
| Looking After ME Ltd | Health & social care | 2022 |
| Lookout Enterprises Ltd. | Administrative & support | 1998 |
| Loom and Line Limited | Wholesale & retail | 2025 |
| Loqski International Limited | Manufacturing | 2014 |
| Lost Lake Investments Limited | Professional & scientific | 2021 |
| Lotus Law Limited | Administrative & support | 2011 |
| Louise Keith Consultancy Limited | Professional & scientific | 2019 |
| Louise Shamais Ltd | Wholesale & retail | 2025 |
| Lounge Collection Ltd | Wholesale & retail | 2016 |
| Love VFX Limited | Information & communication | 2014 |
| Lovedai Limited | Health & social care | 2024 |
| Lowena Projects Ltd | Real estate | 2023 |
| Lower Seavington Farm Limited | Agriculture & fishing | 2025 |
| Lowlands Management Company NO. 2 (Taunton) Limited | Real estate | 2020 |
| Lowman Hotels (Arundel) Ltd | Hospitality | 2022 |
| LP Human Factors Limited | Health & social care | 2013 |
| LPM Building Services Limited | Real estate | 1996 |
| Lpvc Ltd | Professional & scientific | 2023 |
| LQ Holdings Ltd | Hospitality | 2016 |
| LR Bricklaying Ltd | Construction | 2022 |
| LRW Ltd | Financial services | 2026 |
| LSL Group Holdings Ltd | Financial services | 2024 |
| LSL Planning Ltd | Professional & scientific | 2024 |
| LSM Digital Limited | Professional & scientific | 2019 |
| Lsmj Limited | Information & communication | 2017 |
| LSR Trading Limited | Wholesale & retail | 2015 |
| Lssa | Other services | 2018 |
| LST Vehicle Solutions Ltd | Wholesale & retail | 2016 |
| Lsta Sports Ltd | Education | 2019 |
| Lucas Lifts Ltd | Construction | 2017 |
| Lucasaide - Gems Limited | Manufacturing | 2006 |
| LUCKY168 Ltd | Hospitality | 2019 |
| Lucy Ball Consulting Limited | Professional & scientific | 2014 |
| Lucy Searle Ltd | Financial services | 2025 |
| Ludgate Square RTM Company Limited | Households | 2026 |
| Lukai Ltd | Professional & scientific | 2020 |
| Lukictf Ltd | Wholesale & retail | 2025 |
| Lumination Lighting Ltd | Wholesale & retail | 2025 |
| Lumiru Limited | Health & social care | 2025 |
| Lunar Corsair Studios Ltd | Information & communication | 2024 |
| Luqlaw Limited | Professional & scientific | 2025 |
| Luscombe Farms Limited | Agriculture & fishing | 2014 |
| Luson Holdings Limited | Financial services | 2021 |
| LUX Civils Ltd | Construction | 2025 |
| LUX Media & Production Ltd | Information & communication | 2026 |
| LUX Parties Ltd | Hospitality | 2019 |
| Luxborough Property Investments Limited | Real estate | 2015 |
| Luxe Line 3D Limited | Information & communication | 2025 |
| Luxfin Advisory Ltd | Professional & scientific | 2021 |
| Luxhay Cottage Ltd | Financial services | 2022 |
| Luxhay Limited | Professional & scientific | 2018 |
| Luxsea Swimwear Limited | Wholesale & retail | 2017 |
| Luxton Engineering Limited | Construction | 2011 |
| Luxton Wood Ltd | Wholesale & retail | 2026 |
| LVP Beheer Limited | Extraterritorial | 2005 |
| LW Design Limited | Manufacturing | 2006 |
| M & J Meats Limited | Wholesale & retail | 1995 |
| M & M Beheer Limited | Professional & scientific | 2005 |
| M & M COX Limited | Construction | 2004 |
| M & R Everatt Farming Ltd | Agriculture & fishing | 2012 |
| M 4 U Limited | Administrative & support | 2014 |
| M Alkhatib Ltd | Health & social care | 2021 |
| M and C Building Services Limited | Construction | 2011 |
| M B R Gillingham Limited | Construction | 1999 |
| M Best Mitchell Ltd | Financial services | 2026 |
| M Cleaning Services (Taunton) Limited | Administrative & support | 2007 |
| M Cottey Grounds Maintenance Ltd | Administrative & support | 2020 |
| M D Love Electrical Ltd | Construction | 2019 |
| M J & D a Johnson Ltd | Agriculture & fishing | 2011 |
| M J & L E Grinter Limited | Agriculture & fishing | 2019 |
| M J P Developments (Barnstaple) Limited | Construction | 2022 |
| M J S Fire & Security Limited | Administrative & support | 2003 |
| M J Symes Limited | Construction | 2004 |
| M Maddison Consulting Ltd | Professional & scientific | 2014 |
| M P Fyfe Limited | Construction | 2009 |
| M Peters Consulting Ltd | Information & communication | 2020 |
| M R & J E Pearce Limited | Construction | 2017 |
| M R G Taylor Limited | Agriculture & fishing | 1992 |
| M S Dunster Groundworks Ltd | Agriculture & fishing | 2010 |