| Lowdham Leisureworld Holdings Limited | Financial services | 2025 |
| Lowdham Leisureworld Ltd | Wholesale & retail | 2004 |
| Lowdham Outdoor Leisure Limited | Wholesale & retail | 1952 |
| Lowdham Properties Ltd | Real estate | 2010 |
| Lowe's Property Investments Ltd | Real estate | 2020 |
| Lowe's Property Maintenance Ltd | Construction | 2025 |
| Lowercase Solutions Ltd | Information & communication | 2024 |
| Lowes Properties Limited | Transport & logistics | 2019 |
| Lowestoft V.E. Limited | Other services | 1995 |
| Lowez Bargains Ltd | Wholesale & retail | 2025 |
| Lowland Meadows Ltd | Professional & scientific | 2021 |
| Lowmoor Nursing Home Limited | Health & social care | 1994 |
| Lowrys (Nottingham) Limited | Construction | 2012 |
| Loxley Court Management RTM Company Limited | Households | 2005 |
| Loxton Dolby Holdco Limited | Real estate | 2021 |
| Loxton Dolby Limited | Real estate | 2021 |
| Loxton Property Holdco Limited | Real estate | 2021 |
| Loxton Property Limited | Real estate | 2021 |
| Loyal Auto Ltd | Wholesale & retail | 2021 |
| Loyal Coco Beauty Ltd | Other services | 2025 |
| Loyal Healthcare Services Ltd | Health & social care | 2024 |
| Loyalty Electrical Limited | Construction | 2024 |
| Lozi's Catering Limited | Administrative & support | 2012 |
| LP Asset Management Ltd | Real estate | 2013 |
| LP Commerce Limited | Transport & logistics | 2025 |
| LP01 Ltd | Real estate | 2025 |
| Lpaewsepoeb Ltd | Manufacturing | 2026 |
| Lpas 4 U Ltd | Administrative & support | 2026 |
| LPJ Entertainment Limited | Arts & recreation | 2014 |
| LPJ Investment Group Ltd | Real estate | 2021 |
| Lpl-Uk Limited | Transport & logistics | 2026 |
| LR 1971 Limited | Hospitality | 2023 |
| LR Ashburner Property Limited | Real estate | 2021 |
| LR Bereavement Holdings Limited | Financial services | 2022 |
| LR Executive Chauffeurs Ltd | Transport & logistics | 2024 |
| LR Management Limited | Real estate | 2025 |
| LR Performance Tuning Ltd | Wholesale & retail | 2023 |
| LR Supplier Limited | Manufacturing | 2020 |
| LR Tanning Ltd | Other services | 2024 |
| LR UK Servicing Ltd | Professional & scientific | 2026 |
| LR911 Limited | Real estate | 2021 |
| Lrag (UK) Limited | Water & waste | 2025 |
| LRB Catering Limited | Hospitality | 2020 |
| Lrco Carlton Limited | Real estate | 2021 |
| Lrco Colwick Limited | Real estate | 2025 |
| Lrco Limited | Real estate | 2021 |
| Lrco Radcliffe Limited | Real estate | 2021 |
| LRD Investment Holdings Ltd | Real estate | 2026 |
| LRD Property Ventures Ltd | Real estate | 2025 |
| LRE Services Limited | Construction | 2024 |
| Lrlt Holdings Limited | Real estate | 2022 |
| LRM Contact Consultants Ltd | Administrative & support | 2020 |
| LRM Homes Ltd | Real estate | 2025 |
| Lrpk Roofing Services Limited | Construction | 2023 |
| LRS Property Solutions Ltd | Real estate | 2021 |
| LS Core Service Management Ltd | Administrative & support | 2026 |
| LS Electronics Group Limited | Manufacturing | 2002 |
| LS Forklift Training Ltd | Education | 2022 |
| LS Legacy Ltd | Construction | 2017 |
| LS Side Construction Ltd | Construction | 2018 |
| LS Telecoms Limited | Information & communication | 2004 |
| LSB Enterprises Ltd | Hospitality | 2024 |
| LSD Property Ltd | Construction | 2019 |
| LSE Investments Ltd | Financial services | 2020 |
| LSF Transport Limited | Transport & logistics | 2026 |
| LSG Automotive Ltd | Wholesale & retail | 2024 |
| LSG Services Ltd | Other services | 2025 |
| LSJ Services (England) Limited | Administrative & support | 2018 |
| LSL Developers Ltd | Construction | 2024 |
| Lsll Consulting Limited | Professional & scientific | 2022 |
| Lslr Property Limited | Real estate | 2024 |
| LSP Joinery Projects Ltd | Construction | 2017 |
| LSR Homes Ltd | Construction | 2026 |
| LSR Leak Secure Roofing Ltd | Construction | 2025 |
| LSS Elite Ltd | Transport & logistics | 2025 |
| LST Windows & Doors Ltd | Manufacturing | 2025 |
| LT Joinery and Construction Ltd | Manufacturing | 2026 |
| LT Property Sourcing Ltd | Real estate | 2024 |
| Ltang Ltd | Extraterritorial | 2022 |
| LTB Films Limited | Information & communication | 2005 |
| LTC Sales Limited | Wholesale & retail | 2022 |
| LTF Enterprise Ltd | Wholesale & retail | 2024 |
| LTM Compliance (UK) Limited | Water & waste | 2014 |
| LTM Compliance Limited | Water & waste | 2013 |
| Ltstudenthomes Ltd | Real estate | 2016 |
| LU Building Services Ltd | Construction | 2024 |
| LU Supermarket Ltd | Wholesale & retail | 2021 |
| Lu's Art Factory Ltd | Professional & scientific | 2021 |
| Luaesthetics Ltd | Arts & recreation | 2026 |
| Luana Properties Limited | Real estate | 2023 |
| Luartito Ltd | Transport & logistics | 2026 |
| Luba Appliances Group Ltd | Financial services | 2025 |
| Luba Appliances Ltd | Wholesale & retail | 2025 |
| Luba Distribution Ltd | Wholesale & retail | 2016 |
| Luba Holdings Ltd | Financial services | 2025 |
| Luba Investment Ltd | Real estate | 2021 |
| Lubemba Care Services Ltd | Health & social care | 2017 |
| Lubequip Ltd | Professional & scientific | 2019 |
| Lubos Venntures Limited | Information & communication | 2021 |
| Lubriserv Limited | Wholesale & retail | 2009 |