| LWP Etail Ltd | Wholesale & retail | 2009 |
| LX Tequila Ltd | Wholesale & retail | 2025 |
| Lychee Foods Ltd | Hospitality | 2020 |
| Lyciar (UK) Limited | Professional & scientific | 2011 |
| Lycolife Limited | Professional & scientific | 2014 |
| Lycomirai Ltd | Wholesale & retail | 2025 |
| Lydgate Ltd | Real estate | 2025 |
| Lydia Logic Ltd | Wholesale & retail | 2020 |
| Lydlynch Pre-School Limited | Education | 2005 |
| Lykos Construction Limited | Construction | 2024 |
| Lyle Hill Ltd | Administrative & support | 2005 |
| Lymar Ltd | Real estate | 2025 |
| Lymington Court Leavesden Management Limited | Households | 1989 |
| Lymington Enterprise Centre (Management) Ltd | Real estate | 2004 |
| Lymington Technical Services Limited | Administrative & support | 1981 |
| Lynbury Court Management Company Limited | Households | 1979 |
| Lyndhurst Stag Ltd | Hospitality | 2024 |
| Lyne Ltd | Construction | 2024 |
| Lynes Digital Studio Limited | Professional & scientific | 2026 |
| Lynne Ball Limited | Financial services | 2014 |
| Lynsey Morgan Limited | Health & social care | 2024 |
| Lyons Property Management (Kent) Limited | Construction | 2013 |
| Lyons Tea Rooms Ltd | Wholesale & retail | 2020 |
| Lyss Luxe Limited | Other services | 2019 |
| Lyvwell Clinic Ltd | Health & social care | 2026 |
| LYY Limited | Wholesale & retail | 2019 |
| LZ Carpentry Ltd | Construction | 2018 |
| M & C Motor Services Ltd | Wholesale & retail | 2015 |
| M & D Interiors Ltd. | Construction | 2018 |
| M & J Mobility Limited | Professional & scientific | 2008 |
| M & M (Hythe) Limited | Hospitality | 2007 |
| M & N Transport Limited | Administrative & support | 2001 |
| M & R Airflow Limited | Construction | 2002 |
| M & R Electrical Services Limited | Construction | 2003 |
| M & S Locke and SON Limited | Construction | 2000 |
| M & Y Trans Ltd | Transport & logistics | 2019 |
| M a Autolocks Ltd | Administrative & support | 2026 |
| M a Hillyear Ltd | Construction | 2018 |
| M a Singerr & Sons Ltd | Professional & scientific | 2015 |
| M a Systems & Control Limited | Professional & scientific | 1991 |
| M B Tiling Limited | Construction | 2011 |
| M Bagley Builders Limited | Construction | 2003 |
| M Benfield and Co Limited | Professional & scientific | 2004 |
| M Carter & Associates Ltd | Wholesale & retail | 2024 |
| M Cole Consultancy Ltd | Professional & scientific | 2024 |
| M COX Motorcycles Limited | Wholesale & retail | 2018 |
| M Curtis GAS Services Limited | Construction | 2019 |
| M D Jones Plumbing and Heating Ltd | Construction | 2023 |
| M D Stroud Limited | Wholesale & retail | 2018 |
| M E White Ltd | Health & social care | 2022 |
| M G Ceilings & Linings (UK) Limited | Construction | 2011 |
| M G S Developments Limited | Construction | 1999 |
| M H Building Projects Limited | Construction | 2025 |
| M Hoare Rail Ltd | Construction | 2023 |
| M Holmes Roofing Limited | Construction | 2020 |
| M Jallow Ltd | Manufacturing | 2016 |
| M K Facades Limited | Construction | 2013 |
| M K Rowe Trading Ltd | Wholesale & retail | 2025 |
| M Khan Solutions Ltd | Professional & scientific | 2017 |
| M L Kitchens Limited | Construction | 2013 |
| M L Sparky Limited | Manufacturing | 2016 |
| M N Ahmed Investments Ltd | Real estate | 2019 |
| M Qais London Ltd | Wholesale & retail | 2026 |
| M R Grove Haulage Limited | Transport & logistics | 2009 |
| M S Lift Services Ltd | Construction | 2009 |
| M Saliba Building Technical Limited | Professional & scientific | 2025 |
| M Shelley Electrical Ltd | Construction | 2018 |
| M Signs SOU Ltd | Professional & scientific | 2025 |
| M Singh Logisitcs Limited | Transport & logistics | 2026 |
| M Studio Gym Limited | Arts & recreation | 2018 |
| M Sunder Properties Limited | Real estate | 2019 |
| M Turner Psychology Ltd | Education | 2025 |
| M W Woodford & Sons Limited | Administrative & support | 2016 |
| M Wilson Enterprise Limited | Other services | 2017 |
| M&A Global Ventures Limited | Wholesale & retail | 2024 |
| M&B Group Holdings Limited | Financial services | 2023 |
| M&C Predators MMA Ltd | Education | 2025 |
| M&C Steelfixing and Concrete Placement Limited | Construction | 2016 |
| M&G Homes Ltd | Real estate | 2017 |
| M&G Interiors Ltd | Construction | 2025 |
| M&G0510 Ltd. | Transport & logistics | 2017 |
| M&I Autos Ltd | Wholesale & retail | 2026 |
| M&J Airbnbs Limited | Real estate | 2023 |
| M&J Gardening Services Ltd | Administrative & support | 2025 |
| M&K Group Holdings Ltd | Financial services | 2020 |
| M&L Decorators Ltd | Construction | 2020 |
| M&M Painting and Decorating Ltd | Construction | 2026 |
| M&M Pro Decorating Ltd | Construction | 2021 |
| M&M Security Services Limited | Administrative & support | 2024 |
| M&Q Hair Salon Ltd | Other services | 2021 |
| M&S Pour Limited | Wholesale & retail | 2025 |
| M&V Construct Ltd | Construction | 2019 |
| M&W Building Services Limited | Construction | 2013 |
| M-Advance Limited | Extraterritorial | 2000 |
| M-Pro Services Limited | Construction | 2026 |
| M-Pulse Electrical Limited | Construction | 2014 |
| M-Tech Electrical Services South Ltd | Construction | 2022 |
| M. & B. Fuel Injection Service Limited | Wholesale & retail | 1976 |
| M. Ahari Plant Limited | Construction | 2010 |
| M. Garwin Plumbing & Heating Limited | Construction | 2009 |