| LMS EOT Ltd | Professional & scientific | 2024 |
| LMS Highways Limited | Construction | 1973 |
| LMS Holdings Ltd | Financial services | 2019 |
| Lmsc Holdings Ltd | Other services | 2024 |
| LMW Oakmont Limited | Financial services | 2025 |
| LOC Laveuses Cailleboutis Limited | Other services | 2020 |
| Locked in a Room (Bristol) Ltd | Real estate | 2020 |
| Locked in a Room (CP) Ltd | Real estate | 2021 |
| Locked in a Room (Exeter) Limited | Real estate | 2021 |
| Locked in a Room (M.K.) Ltd | Real estate | 2020 |
| Locked in a Room (Southampton) Ltd | Real estate | 2021 |
| Locksley Grange Management Company Limited | Households | 2001 |
| Locomartin Limited | Hospitality | 2018 |
| Locumjob Ltd | Health & social care | 2022 |
| Lofthouse Property and Management Services Ltd | Real estate | 2013 |
| Lofts Away Limited | Construction | 2005 |
| Lomond MAE Developments Ltd | Construction | 2024 |
| Lomond MAE Holdings Limited | Financial services | 2023 |
| London Flows Mechanical Ltd | Construction | 2022 |
| Lone Star Locker Limited | Wholesale & retail | 2025 |
| Lonsdale Road (Blackpool) Management Co Ltd | Households | 2023 |
| LOO2LOO Plumbing Ltd | Construction | 2024 |
| Looped Vintage Ltd | Wholesale & retail | 2026 |
| Loopy Parrot Ltd | Wholesale & retail | 2013 |
| Lords of Torbay Ltd | Administrative & support | 2025 |
| Lorna Doone (Torquay) Limited | Households | 2005 |
| Lorna's Corner (Torquay) Management Company Limited | Households | 1997 |
| Lost Art London Ltd | Professional & scientific | 2018 |
| Lotwin Software Limited | Information & communication | 1999 |
| Lounge Retail Group Ltd | Wholesale & retail | 2025 |
| Love Mosaic Tile Limited | Wholesale & retail | 2020 |
| Lovecats Ltd | Manufacturing | 2024 |
| Lovegate Marketing Limited | Wholesale & retail | 2015 |
| Loveliest Homes Torquay Ltd | Hospitality | 2022 |
| Lovell Holdings Limited | Financial services | 2006 |
| Lovell Property Investments (SW) Limited | Financial services | 2015 |
| Lower Westerland Farm Ground Management Ltd | Administrative & support | 2026 |
| Lowles Investments Ltd | Real estate | 2021 |
| Lowles Ireland Limited | Real estate | 2026 |
| Lowrie Brokers Ltd | Financial services | 2025 |
| LP Investments Ltd | Real estate | 2012 |
| LPE Distribution Limited | Manufacturing | 2012 |
| LPG Properties Torquay Limited | Hospitality | 2010 |
| LR Virtual HR Assistant Limited | Administrative & support | 2024 |
| LRO Energy Ventures Limited | Energy | 2025 |
| LRP Trading Ltd | Wholesale & retail | 2020 |
| LS Transportation Limited | Transport & logistics | 2019 |
| LSC Supplement Solutions Ltd | Wholesale & retail | 2024 |
| LTB Services Ltd | Transport & logistics | 2020 |
| Lucerne Management Company Limited | Households | 1982 |
| Lucius Street Properties Ltd | Real estate | 2025 |
| Lucky Gifts Ltd | Wholesale & retail | 2012 |
| Lucwin Limited | Professional & scientific | 2016 |
| Lucy Faye Ltd | Financial services | 2019 |
| Lulu's Coffee House Ltd | Extraterritorial | 2019 |
| Luscombe House Property Management Limited | Construction | 2018 |
| LUXCARE4U Limited | Health & social care | 2025 |
| Luxe Asset Holdings Ltd. | Other services | 2017 |
| Luxe Bullion Limited | Other services | 2020 |
| Luxe Horizons Limited | Hospitality | 2023 |
| Luzon Limited | | 1986 |
| LVK Ltd | Real estate | 2018 |
| Lydwell Developments Ltd | Real estate | 2020 |
| Lygetun Ltd | Information & communication | 2022 |
| LYL (WSM) Ltd | Real estate | 2017 |
| Lyme View RTM Company Limited | Households | 2010 |
| LYN Trading Ltd | Hospitality | 1982 |
| Lyncourt Management Company (Torquay) Limited | Households | 2008 |
| Lynway Court RTM Company Limited | Households | 2011 |
| Lytton House & Waldon Court Ltd. | Real estate | 2004 |
| M & a Armbruster Limited | Wholesale & retail | 2017 |
| M Callam Ltd | Construction | 2015 |
| M H Nankivell Limited | Health & social care | 2022 |
| M LOW Consultancy Limited | Professional & scientific | 2021 |
| M N Scaffolding Ltd | Construction | 2011 |
| M T Churston Court Limited | Hospitality | 2022 |
| M&A Ashworth Ltd | Health & social care | 2014 |
| M&E Surfacing Ltd | Construction | 2015 |
| M&G Stores Ltd | Wholesale & retail | 2024 |
| M&J Coffee House Ltd | Hospitality | 2022 |
| M&S Industries Ltd | Administrative & support | 2025 |
| M&T Catering ( Torquay) Ltd | Hospitality | 2020 |
| M. L Eden & SON Plumbing & Heating Services Ltd | Construction | 2014 |
| M.J. & K.L. Limited | Real estate | 2023 |
| M.M. Essex Building Ltd | Construction | 2015 |
| M.R. Consultants Limited | Information & communication | 1998 |
| M.R. Furnishing & Design Limited | | 1990 |
| M.W. Benney Limited | Construction | 1998 |
| M.W. Enterprises Limited | Wholesale & retail | 1984 |
| Mabuhay Medics Ltd | Health & social care | 2026 |
| MAC & SON Tax Services Ltd | Professional & scientific | 2020 |
| MAC Eleven Ltd | Professional & scientific | 2009 |
| Maciej Targowski Limited | Health & social care | 2012 |
| Mackerel Torquay Limited | Hospitality | 2026 |
| Macrotone Consulting Limited | Information & communication | 1996 |
| Maddock Wealth Management Ltd | Professional & scientific | 2025 |
| Maddox Buildworx Ltd | Construction | 2026 |
| Made for ME (Furniture) CIC | Other services | 2024 |
| Made to Hold Tattoo Ltd | Other services | 2017 |
| Maevalun Company Limited | Health & social care | 2025 |