| Lkstrain Ltd | Real estate | 2023 |
| LL Couriers Limited | Transport & logistics | 2022 |
| LL Electrical Services Ltd | Construction | 2026 |
| LL Enterprise Ltd | Hospitality | 2026 |
| Llama Digital Limited | Information & communication | 2006 |
| LLC Holdings Ltd | Real estate | 2025 |
| Llewelyn Davies Aviation Limited | Professional & scientific | 2013 |
| Llewelyn Davies Limited | Professional & scientific | 2017 |
| Llewelyn Davies Planning Limited | Professional & scientific | 2013 |
| Llewelyn Davies Yeang Limited | Professional & scientific | 2013 |
| Llewelyn-Davies International Limited | Professional & scientific | 1978 |
| LLHD2025 Limited | Health & social care | 2025 |
| LLJ Houses Limited | Real estate | 2022 |
| Lloyd Clough & Sons Limited | Construction | 1988 |
| Lloyd Langford Expedition Training Limited | Arts & recreation | 2015 |
| Lloyds Access Workshop Ltd | Manufacturing | 2023 |
| Lloyds Consultancy Services Limited | Professional & scientific | 2017 |
| LLS Architech Ltd | Information & communication | 2025 |
| Llsecom Ltd | Wholesale & retail | 2025 |
| Llwyn DU Holiday Park Limited | Hospitality | 2021 |
| LM & Sons Roofing Ltd | Construction | 2023 |
| LM Hair & Beauty Lounge Limited | Other services | 2025 |
| LM Performance & Fitness Ltd | Arts & recreation | 2025 |
| Lm&Ap Ltd | Wholesale & retail | 2023 |
| LM07 Hospitality Ltd | Hospitality | 2025 |
| LM8 Group Ltd | Hospitality | 2025 |
| LMB Estates Ltd | Households | 2023 |
| LMB Hillcrest Home Limited | Health & social care | 2013 |
| LMB Mechanical Services (Midlands) Limited | Construction | 2023 |
| LMC Products Limited | Wholesale & retail | 2007 |
| LMC Stone Surfaces Ltd | Manufacturing | 2025 |
| LMC Yorkshire Ltd | Construction | 2022 |
| LMD Hospitality Ltd | Hospitality | 2026 |
| LMD Property Limited | Real estate | 2018 |
| LML Ecom Ltd | Wholesale & retail | 2024 |
| LMP Data Consultancy Ltd | Information & communication | 2023 |
| Lmrb Limited | Real estate | 2021 |
| LMS Catering Limited | Hospitality | 2012 |
| LN Caffrey Developments Ltd | Real estate | 2021 |
| LN Community Foundation CIC | Education | 2026 |
| LNO Cladding Solutions Limited | Construction | 2018 |
| Load Pixels Ltd | Professional & scientific | 2026 |
| Loadcart Limited | Wholesale & retail | 2025 |
| Loaded and Layered Ltd | Hospitality | 2026 |
| Loader Limited | Information & communication | 2019 |
| Loadhog 2011 Limited | Manufacturing | 2001 |
| Loadhog Foundation | Professional & scientific | 2021 |
| Loadhog Limited | Manufacturing | 2003 |
| Loading Bay Services Limited | Extraterritorial | 2008 |
| Lobo Bobo Ltd | Wholesale & retail | 2021 |
| Lobo Property Limited | Real estate | 2002 |
| Lobster BOY Limited | Information & communication | 2013 |
| Lobsy Consulting Services Limited | Professional & scientific | 2016 |
| Loca FC Ltd | Arts & recreation | 2024 |
| Local & International Food Supermarket Ltd | Wholesale & retail | 2025 |
| Local Action for Better CVD Prevention (Labcvd) CIC | Professional & scientific | 2026 |
| Local Business Marketing Ltd | Professional & scientific | 2024 |
| Local Convenience Market Ltd | Wholesale & retail | 2025 |
| Local Democracy and Health Limited | Professional & scientific | 2012 |
| Local Drumchapel Limited | Wholesale & retail | 2026 |
| Local Europe Ltd | Wholesale & retail | 2024 |
| Local FIX Ltd | Construction | 2025 |
| Local Link Hub Ltd | Information & communication | 2024 |
| Local Mini Market S80 Ltd | Wholesale & retail | 2024 |
| Local Offlicence Ltd | Wholesale & retail | 2024 |
| Local Plusss Ltd | Wholesale & retail | 2025 |
| Local Scaffold Services Ltd | Construction | 2016 |
| Local Scaffolding Services Ltd | Construction | 2015 |
| Local Windows and Building Services Limited | Construction | 2013 |
| Locale Coffee Ltd | Manufacturing | 2023 |
| Localhelpar Ltd | Wholesale & retail | 2025 |
| Locallens Ltd | Extraterritorial | 2025 |
| Localphone Limited | Information & communication | 2007 |
| Localyze (UK) Ltd | Administrative & support | 2021 |
| Lochside Limousines Ltd | Transport & logistics | 2025 |
| Lock & Key Sheffield Ltd | Administrative & support | 2025 |
| Lock Climbing Ltd | Manufacturing | 2021 |
| Lock the Tent Productions Ltd | Information & communication | 2020 |
| Locked Group Ltd | Information & communication | 2024 |
| Lockinson Properties Limited | Real estate | 2024 |
| Lockoff Promotions Ltd | Arts & recreation | 2024 |
| Locksafe UK Limited | Transport & logistics | 2008 |
| Locksley Distilling Company Limited | Manufacturing | 2013 |
| Lockwood Consultancy Ltd | Information & communication | 2023 |
| Lockwood Trading Ltd | Wholesale & retail | 2015 |
| Lockwood's Flooring Limited | Construction | 2023 |
| Lockwood's Investments Limited | Real estate | 2025 |
| Lockwoods Flowers Limited | Wholesale & retail | 2010 |
| Locs Consultant Limited | Information & communication | 2020 |
| Lodestar Estates Limited | Agriculture & fishing | 1987 |
| Lodestar Holdings Limited | Professional & scientific | 1920 |
| Lodestone Advisors Limited | Administrative & support | 2010 |
| Lodestone Recruitment Ltd | Administrative & support | 2020 |
| Lodge Lane OFF Licence Ltd | Wholesale & retail | 2025 |
| Lodge Moor Apartments RTM Company Limited | Administrative & support | 2009 |
| Lodge Moor Consulting Limited | Information & communication | 2016 |
| Lodge Pizza Ltd | Hospitality | 2025 |
| Lodgemoor Holdings Ltd | Professional & scientific | 2016 |
| Lodgemoor Investments Ltd | Financial services | 2020 |
| Loft Conversion Sheffield Limited | Construction | 2025 |