| Luminous Garage Limited | Wholesale & retail | 2021 |
| Lumneon Signage Ltd | Professional & scientific | 2023 |
| Lumwood Financial Planning Ltd | Financial services | 2015 |
| Luna Associates Ltd | Professional & scientific | 2024 |
| Lunar Nexus Ltd | Wholesale & retail | 2024 |
| Lunarex Limited | Agriculture & fishing | 2021 |
| Lunaris Labs Limited | Other services | 2024 |
| Lund Wealth Management Ltd | Financial services | 2013 |
| Lunddr Limited | Information & communication | 2025 |
| Lundy Site Investigation Limited | Construction | 2015 |
| Lunr Launch Limited | Professional & scientific | 2026 |
| Lupix Ltd | Wholesale & retail | 2021 |
| Lurex Properties Limited | Construction | 2026 |
| Lushhue Limited | Wholesale & retail | 2024 |
| Lusso Executive Travel Ltd | Transport & logistics | 2025 |
| Lust Raffles Ltd | Wholesale & retail | 2025 |
| Lustra Pro Ltd | Administrative & support | 2025 |
| Lustre Aesthetics Clinic Limited | Health & social care | 2020 |
| Luuba Cleaning Ltd | Administrative & support | 2024 |
| Luuba Ltd | Wholesale & retail | 2023 |
| LUV ME Lash ME Ltd | Wholesale & retail | 2018 |
| LUX General Lighting Ltd | Wholesale & retail | 2015 |
| LUX Maison Ltd | Wholesale & retail | 2019 |
| LUX Predia Ltd | Real estate | 2024 |
| Luxdel Ltd | Construction | 2019 |
| Luxe Cleans Group Ltd | Administrative & support | 2025 |
| Luxe Dental LAB Ltd | Health & social care | 2024 |
| Luxe Doors Ltd | Construction | 2022 |
| Luxe Forever Limited | Wholesale & retail | 2025 |
| Luxe Gems Handcrafted Ltd | Wholesale & retail | 2026 |
| Luxe Hair Extensions Professional Ltd | Other services | 2025 |
| Luxe Interiors Ltd | Construction | 2023 |
| Luxe Living Developments Ltd | Real estate | 2024 |
| Luxe Resale Limited | Wholesale & retail | 2016 |
| Luxe Tanz Ltd | Other services | 2024 |
| Luxe Tiling Ltd | Construction | 2023 |
| Luxe Treasures UK Ltd | Wholesale & retail | 2025 |
| Luxe Windows Ltd | Construction | 2021 |
| Luxeco Nest Limited | Real estate | 2024 |
| Luxica Awnings & Pergolas Ltd | Construction | 2023 |
| Luxleads AI Ltd | Information & communication | 2026 |
| Luxo Living Ltd | Wholesale & retail | 2009 |
| Luxor Wells Limited | Financial services | 2017 |
| Luxurite UK Limited | Wholesale & retail | 2006 |
| Luxury Escapes Bath Limited | Hospitality | 2014 |
| Luxury Fashion Management Ltd | Construction | 2018 |
| Luxury Fleet Ltd | Transport & logistics | 2025 |
| Luxury Home Interior Limited | Wholesale & retail | 2021 |
| Luxury Interiors London Ltd | Wholesale & retail | 2023 |
| Luxury Interiors Manufacturing Holdings Limited | Financial services | 2022 |
| Luxury Interiors Manufacturing Limited | Manufacturing | 2022 |
| Luxury Limos Limited | Transport & logistics | 2022 |
| Luxury Links Golf Tours Ltd | Administrative & support | 2021 |
| Luxurypresh Hair Ltd | Other services | 2026 |
| Luxx Chauffeurs Ltd | Transport & logistics | 2026 |
| Luxy Care Limited | Wholesale & retail | 2019 |
| Luxè DE Fleurs Limited | Wholesale & retail | 2018 |
| LV-426 Solutions Ltd | Information & communication | 2019 |
| Lvassessors(Nw) Ltd | Professional & scientific | 2024 |
| Lvin Food Store Limited | Hospitality | 2012 |
| LW International Ltd | Wholesale & retail | 2016 |
| LWA Projects Limited | Construction | 2018 |
| Lwfm Limited | Construction | 2026 |
| Lwgdw Ltd | Real estate | 2014 |
| Lwks Properties LLP | | 2007 |
| Lwpc Ltd | Professional & scientific | 2005 |
| Lwwdesign Ltd | Administrative & support | 2020 |
| LXL Media Ltd | Information & communication | 2018 |
| Lxnd Ltd | Real estate | 2025 |
| Lydian Safety Ltd | Professional & scientific | 2022 |
| Lymm Care Limited | Health & social care | 2014 |
| Lynch Build Co Ltd | Construction | 2025 |
| Lynch&Co Ltd | Real estate | 2026 |
| Lyndhurst 66 Ltd | Real estate | 2026 |
| Lyndon Flats Limited | Real estate | 2014 |
| Lyndsay Walker Limited | Wholesale & retail | 2008 |
| Lynic Cleaning Services Ltd | Administrative & support | 2024 |
| Lyons Assets & Holdings Ltd | Real estate | 2025 |
| Lyons Electrical Limited | Construction | 1996 |
| Lyra Linens Limited | Wholesale & retail | 2021 |
| Lytham Service Station Ltd | Real estate | 2005 |
| Lytham Tutors Independent Ltd | Education | 2025 |
| Líly Light Ltd | Health & social care | 2023 |
| M W Plumbing Limited | Construction | 2011 |
| M & H Superstore Bolton Ltd | Wholesale & retail | 2025 |
| M & a Ceramics Limited | Health & social care | 2016 |
| M & C Driving Ltd | Transport & logistics | 2025 |
| M & Co Investments Ltd | Financial services | 2022 |
| M & D Drains Limited | Construction | 2020 |
| M & D Membranes Ltd | Construction | 2021 |
| M & F Fuels Limited | Real estate | 2017 |
| M & F Garage UK Ltd | Wholesale & retail | 2024 |
| M & I Newsagents Ltd | Wholesale & retail | 2016 |
| M & J Builders & Sons Limited | Construction | 2009 |
| M & J Nuttall Limited | Construction | 2018 |
| M & L Investment (NW) Ltd | Real estate | 2024 |
| M & M Catering Bolton Limited | Hospitality | 2018 |
| M & M Hauliers (Notts) Limited | Transport & logistics | 2018 |
| M & M Knowles Suspended Ceilings & Partitions Limited | Wholesale & retail | 2003 |
| M & R Plumbing & Heating (Maintenance & Repair) Ltd | Manufacturing | 2019 |