| Lockfit (Oxford) Ltd | Construction | 2023 |
| Lockfit (Sutton/Lichfield/Tamworth) Limited | Administrative & support | 2024 |
| Lockfit (Warks) Ltd | Construction | 2020 |
| Locks by Maliha Ltd | Wholesale & retail | 2025 |
| Lockyers Building Services Ltd | Construction | 2026 |
| Locum 2 U Limited | Health & social care | 2004 |
| Locum Vision Plus Ltd | Health & social care | 2016 |
| Lode Heath School | Education | 2011 |
| Lodestone Safety Services Ltd | Professional & scientific | 2024 |
| Lodge Road Freehold Company Limited | Real estate | 2016 |
| Lodhia Investments Limited | Real estate | 2007 |
| Lofthouse Lettings Ltd | Hospitality | 2025 |
| Logdex Ltd | Wholesale & retail | 2023 |
| Logic Care Ltd | Health & social care | 2022 |
| Logic Lory Ltd | Information & communication | 2016 |
| Logical Vehicle Management Limited | Administrative & support | 2008 |
| Logisphere Ltd | Transport & logistics | 2026 |
| Logistix Computer Solutions Limited | Information & communication | 2006 |
| Logomotif Creative Design Limited | Manufacturing | 1988 |
| Logwood Homes Limited | Real estate | 2022 |
| LOH Opticservice (U.K.) Limited | Extraterritorial | 1980 |
| Lollipop Design Studio Limited | Professional & scientific | 2025 |
| LOMBARDIS1921 Ltd | Hospitality | 2024 |
| Lomme Limited | Manufacturing | 2005 |
| London & Sterling Enterprises Limited | Real estate | 2025 |
| London & Sterling International Limited | Real estate | 2025 |
| London & Sterling Limited | Financial services | 2025 |
| London Accountancy & Taxation Ltd | Professional & scientific | 2025 |
| London Global Consulting Group Ltd | Professional & scientific | 2018 |
| London Learners Ltd | Education | 2026 |
| London Looks Barber Ltd | Other services | 2025 |
| London Road Lichfield Limited | Real estate | 2012 |
| London School of Trading Ltd | Education | 2026 |
| London's Car Ltd | Wholesale & retail | 2025 |
| Londons Energy Limited | Other services | 2019 |
| Lone Cypress Ltd | Construction | 2023 |
| Long Garden Dwellings Ltd | Real estate | 2023 |
| Long Garden Holdings Ltd | Financial services | 2023 |
| Long Lane (Fowlmere) Limited | Construction | 2020 |
| Long Vere Group Limited | Professional & scientific | 2020 |
| Long Vere Ltd | Administrative & support | 1989 |
| Long Vere Property Group Ltd | Construction | 2020 |
| Longdon Croft (Management) Limited | Households | 2004 |
| Longmore New House Limited | Hospitality | 2021 |
| Look After Care Ltd | Health & social care | 2022 |
| Look Local Limited | Information & communication | 2005 |
| Look Local Publications Limited | Information & communication | 2002 |
| LOOKING4PLAYERS Ltd | Information & communication | 2026 |
| Looks Skin Clinic Limited | Health & social care | 2022 |
| Loomi NOX Ltd | Arts & recreation | 2025 |
| Loop Living Limited | Real estate | 2022 |
| Loop Worldwide Limited | Information & communication | 2014 |
| Lorash Holdings Limited | Real estate | 2018 |
| Lordswood Property Developments Limited | Real estate | 2017 |
| Loris Fish Bar Ltd | Wholesale & retail | 2016 |
| Lorne Building Limited | Construction | 2023 |
| Lotsawa and Tyndale Global Consulting Services Limited | Wholesale & retail | 2023 |
| Lottek Ltd | Information & communication | 2019 |
| Lotus Home Staging UK Ltd | Real estate | 2017 |
| Lotus Investors Ltd | Real estate | 2025 |
| Lotus Multiservices Ltd | Other services | 2007 |
| Louie and Snoopy Ltd | Wholesale & retail | 2024 |
| Lounge Underwear Limited | Wholesale & retail | 2016 |
| Louvèd Ltd. | Information & communication | 2025 |
| Louy Magroos Ltd | Manufacturing | 2013 |
| Love Admin (Midlands) Limited | Administrative & support | 2019 |
| Love Laundry and DRY Cleaning Ltd | Other services | 2025 |
| Love My Bungalow Limited | Professional & scientific | 2016 |
| Love Nikkie Limited | Wholesale & retail | 2021 |
| Love Property Co (Solihull) Limited | Real estate | 1993 |
| Lovelace Grange Management Limited | Households | 2001 |
| Lovett Investments Limited | Real estate | 2018 |
| LOW Carbon Homes Ltd | Information & communication | 2019 |
| LOW Cost Logs Limited | Wholesale & retail | 2020 |
| Lower Croft Barns Management Company Limited | Households | 2025 |
| Lower Parkside RTM Company Ltd | Households | 2013 |
| Lowes Lemonade Ltd | Financial services | 2021 |
| Lowha Limited | Information & communication | 2026 |
| Lownet Limited | Professional & scientific | 2009 |
| Loxias Limited | Information & communication | 2022 |
| Loxley Square Management Company Limited | Households | 2001 |
| Loxwood Investments Limited | Financial services | 1954 |
| Loyal Events Ltd | Administrative & support | 2025 |
| LPB Properties Midlands Limited | Real estate | 2022 |
| LPD Civil Solutions Ltd | Professional & scientific | 2023 |
| Lrab Medical Services Ltd | Health & social care | 2024 |
| LRK Healthcare Ltd | Health & social care | 2024 |
| LRM Alsager Ltd | Hospitality | 2022 |
| LS Project Management Ltd | Professional & scientific | 2024 |
| LSF Lashes Ltd | Other services | 2019 |
| LSH (Bath Road) Limited | Construction | 2022 |
| LSH (Clifton) Limited | Construction | 2026 |
| LSH (Colney Heath) Ltd | Construction | 2024 |
| LSH (Evesham) Limited | Construction | 2023 |
| LSH (Faringdon) Limited | Construction | 2026 |
| LSH (Henley) Limited | Construction | 2023 |
| LSH (Houghton Regis) Limited | Construction | 2025 |
| LSH (Houldsworth) Limited | Construction | 2021 |
| LSH (Lighthorne) Ltd | Construction | 2023 |
| LSH (Moggerhanger) Limited | Construction | 2018 |