| Liva Food Ltd | Hospitality | 2021 |
| Live Cinema Ltd. | Information & communication | 2014 |
| Live Electrical Solutions Ltd | Construction | 2025 |
| Live Social Media Ltd | Professional & scientific | 2019 |
| Livin Technologies Ltd | Information & communication | 2025 |
| Livsmartservices Ltd. | Other services | 2018 |
| LIZ Gill Mortgages Ltd | Financial services | 2021 |
| LIZ Godman Education Consultancy Ltd | Education | 2011 |
| LIZ Higgs Ltd | Health & social care | 2021 |
| Lizzie Logistics Ltd | Transport & logistics | 2023 |
| LJ Properties (Yorkshire) Limited | Real estate | 2024 |
| LJ Roofing Services Ltd | Construction | 2024 |
| LJ Taylor Legal Recruitment Limited | Administrative & support | 2021 |
| LJB Home Cctv Ltd | Administrative & support | 2019 |
| LJB Property Ltd | Real estate | 2021 |
| LJC Tree Specialists Limited | Administrative & support | 2025 |
| LJW Holdings 2026 Ltd | Administrative & support | 2026 |
| LK Equestrian Ltd | Wholesale & retail | 2022 |
| LL Consulting Limited | Professional & scientific | 2023 |
| Llama Travel Marketing Limited | Professional & scientific | 2021 |
| Llcpp Limited | Real estate | 2018 |
| LLV Setting OUT & Surveying Ltd | Construction | 2008 |
| LM Legal Services Ltd | Professional & scientific | 2025 |
| LM Uddin Ltd | Wholesale & retail | 2023 |
| Lm&Aj Ltd | Health & social care | 2021 |
| LMC Joinery Ltd | Construction | 2012 |
| Lmdiaz Ltd | Health & social care | 2024 |
| LMG Fourdrignier Limited | Health & social care | 2015 |
| LMH Corporation Ltd | Health & social care | 2024 |
| Lmjt Ltd | Wholesale & retail | 2026 |
| LMK Nurse Services Ltd | Health & social care | 2025 |
| LMP Online Limited | Wholesale & retail | 2026 |
| LMW Investments Limited | Real estate | 2022 |
| LMW Management Ltd | Real estate | 2020 |
| LMZ Properties Limited | Real estate | 2022 |
| LNW Property Investments Limited | Real estate | 2025 |
| Loading Systems (U.K.) Limited | Professional & scientific | 1997 |
| Lobaz Anaesthetic Services Ltd | Health & social care | 2019 |
| Local Home Solutions Ltd | Construction | 2009 |
| Local Services 2 YOU Limited | Professional & scientific | 2011 |
| Localblend Residents Management Limited | Households | 1987 |
| Locdis Limited | Professional & scientific | 2023 |
| Lochlan Developments Limited | Construction | 2020 |
| Lochlan Purdie Investments Ltd. | Administrative & support | 2016 |
| Lockerroom 002 Ltd | Hospitality | 2024 |
| Lockside Self Storage Ltd | Transport & logistics | 2023 |
| Locksure Solutions Ltd | Manufacturing | 2022 |
| Lockwood A1 Taxis Limited | Transport & logistics | 2025 |
| Lockwood Apartments Ltd | Real estate | 2020 |
| Lockwood Family Property Ltd | Real estate | 2021 |
| Lockwood Health Limited | Wholesale & retail | 2025 |
| Lockwood Leisure Limited | | 1987 |
| Lockwood Property Holdings Limited | Real estate | 2024 |
| Lockwood Residences Ltd | Health & social care | 2024 |
| Lockwood Surgery Prime Health Ltd | Health & social care | 2014 |
| Lockwood Tyres & Service Centre Ltd | Wholesale & retail | 2020 |
| Lockwood Window Company (Yorkshire) Limited | Manufacturing | 2021 |
| Lockwood Windows Coloured Frames Limited | Manufacturing | 2007 |
| Locky Enterprises Limited | Hospitality | 2015 |
| Locorum Ltd | Information & communication | 2017 |
| Loctech Pharmacia Limited | Wholesale & retail | 1999 |
| Locum for Hire Ltd | Wholesale & retail | 2025 |
| Locum NH Ltd | Health & social care | 2021 |
| Locums Pro Ltd | Administrative & support | 2023 |
| Locus Realities Limited | Information & communication | 2020 |
| Locusmart Limited | Wholesale & retail | 2022 |
| Lodge Commercial Limited | Real estate | 2025 |
| Lodge Vision Ltd | Information & communication | 2021 |
| Lodonfoods Limited | Hospitality | 2025 |
| Loft Cushions Limited | Manufacturing | 2025 |
| Loftable Ltd | Real estate | 2026 |
| Logan Roberts Farming LLP | | 2020 |
| Logato Ltd | Wholesale & retail | 2019 |
| Logical Thought Ltd | Information & communication | 2022 |
| Logicalfocus Limited | Information & communication | 1999 |
| Logidct Ltd | Professional & scientific | 2025 |
| Logistics HF Limited | Transport & logistics | 2025 |
| Logistics Media and Publishing Ltd | Professional & scientific | 2025 |
| Logistics Media Ltd | Professional & scientific | 2023 |
| Logo Tape Limited | Administrative & support | 2003 |
| Lojoco Limited | Information & communication | 2008 |
| Lola Capital Ltd | Real estate | 2025 |
| Lola Caterers Ltd | Hospitality | 2019 |
| Lola Events Management Ltd | Other services | 2019 |
| Loly Properties Limited | Real estate | 2025 |
| Lomani Ltd | Wholesale & retail | 2013 |
| Lomax & O'Neill Ltd | Professional & scientific | 2026 |
| London & Provincial Consolidated Investments Limited | Construction | 1993 |
| London Antiques & Rare Gemstones Ltd | Manufacturing | 2021 |
| London Business Search Limited | Professional & scientific | 2007 |
| London Metabolic and Bariatric Surgery Ltd | Health & social care | 2015 |
| London Privé Ltd | Wholesale & retail | 2026 |
| Lone Wolf Security Services Ltd | Extraterritorial | 2015 |
| Long Gate Equestrian Ltd | Agriculture & fishing | 2016 |
| Long ING Ltd | Information & communication | 2016 |
| Long Xiang Co. Ltd | Hospitality | 2021 |
| Longden Electrical Ltd | Construction | 2016 |
| Longley House Enterprise Limited | Households | 2025 |
| Longo & Co UK Ltd | Wholesale & retail | 2019 |
| Longos Property Services Limited | Real estate | 2013 |