| Leeds Dental Centre Ltd | Health & social care | 2023 |
| Leeds Gentle Dental Centre Ltd | Health & social care | 2022 |
| Legacy Fire and Security Solutions Ltd | Administrative & support | 2023 |
| Legal Marketing Services Limited | Professional & scientific | 1994 |
| Leigh Foley Limited | Professional & scientific | 2017 |
| Lektronixuk Ltd | Wholesale & retail | 2025 |
| Lemon Tree Travel Ltd | Administrative & support | 2018 |
| LEO Building and Maintenance Ltd | Construction | 2023 |
| Leonurus Ltd | Real estate | 2021 |
| Less Common Metals Limited | Manufacturing | 1992 |
| Letap Limited | Real estate | 2025 |
| Letts Decorate Commercial Ltd | Construction | 2024 |
| Let’S Go Travel Store Limited | Administrative & support | 2023 |
| Leung Properties Ltd | Real estate | 2024 |
| Lewis Marine Surveys Ltd | Professional & scientific | 2023 |
| LG Design Management Services Ltd | Professional & scientific | 2026 |
| LG Dwellings Ltd | Real estate | 2019 |
| LG Global Holdings UK Ltd | Wholesale & retail | 2019 |
| Lgaviation Ltd | Manufacturing | 2026 |
| LGN Consulting Limited | Professional & scientific | 2025 |
| Lichfield Angel Ltd | Real estate | 2022 |
| Liegus Ltd | Wholesale & retail | 2026 |
| Lifestylepharmacist Ltd | Health & social care | 2024 |
| Liftket UK Ltd | Wholesale & retail | 2021 |
| Light of India Ltd | Hospitality | 2024 |
| Lightning Gifts Limited | Wholesale & retail | 2014 |
| Lily Associates Ltd | Extraterritorial | 2012 |
| Lime Management (Worldwide) Limited | Other services | 2007 |
| Lime Management Australia Limited | Extraterritorial | 2015 |
| Lime Management Limited | Transport & logistics | 2003 |
| Lime TIG Co Ltd | Financial services | 2023 |
| Limehouse Basin Management Limited | Real estate | 1990 |
| Linda Football Car Parking Limited | Administrative & support | 2023 |
| Lindi Dental Ltd | Health & social care | 2025 |
| Lindow Fields (Wilmslow) Management Company Limited | Households | 2019 |
| Lindsay Gordon Millington Ltd | Mining & quarrying | 2018 |
| Lindsay Murphy Ltd | Health & social care | 2022 |
| Lingar Developments Limited | Extraterritorial | 2015 |
| Linus Properties Ltd | Real estate | 2024 |
| Lisk-Ink Ltd | Wholesale & retail | 2025 |
| Lisle Family Investment Company Limited | Professional & scientific | 2025 |
| Lithu Holdings Ltd | Wholesale & retail | 2025 |
| Little Molly's Tea Rooms Ltd | Hospitality | 2018 |
| Little Teapot Publishing Limited | Information & communication | 2023 |
| Liverpool Aggregates Limited | Water & waste | 2021 |
| Liverpool Centre for Counselling & Psychotherapy Limited | Health & social care | 2015 |
| Liverpool Urology Limited | Health & social care | 2012 |
| Livinrooms Property Ltd | Real estate | 2022 |
| LJ Reynolds Ltd | Real estate | 2023 |
| Llanerch-Y-Mor Dock Holdings Ltd | Real estate | 2015 |
| Llanerch-Y-Mor Land Holdings Ltd | Real estate | 2015 |
| Locatemythings.Com Limited | Extraterritorial | 2009 |
| Lockmate Locksmiths Ltd | Other services | 2024 |
| Locks 4 Vans Limited | Manufacturing | 2003 |
| Logical Management Services Limited | Professional & scientific | 2024 |
| London Endosurgery Limited | Health & social care | 2019 |
| Long Term Leasing Limited | Extraterritorial | 1998 |
| Longbank Electrical Limited | Construction | 2021 |
| Longford Road Dental Holdings Ltd | Financial services | 2023 |
| LOT Property Solutions Ltd | Households | 2024 |
| Lounds & Associates Limited | Professional & scientific | 2013 |
| Love Doesnt Hurt Ltd | Education | 2025 |
| Lowe and Sons Limited | Real estate | 1981 |
| Loxdale Kebab Ltd | Hospitality | 2023 |
| Loyal Blue Care Ltd | Health & social care | 2021 |
| LRF Advanced Healthcare Ltd | Public administration | 2023 |
| LS Stop & Shop Ltd | Wholesale & retail | 2025 |
| Lsdenholdings Ltd | Real estate | 2024 |
| LT Inspection Ltd | Professional & scientific | 2013 |
| Ltautomotive Ltd | Wholesale & retail | 2025 |
| LTG Design Management Services Ltd | Professional & scientific | 2026 |
| LTH 1 Ltd | Financial services | 2025 |
| LTH 2 Ltd | Financial services | 2025 |
| Lumbers Northwest Ltd | Administrative & support | 2022 |
| Luminaire Group Limited | Health & social care | 2025 |
| Luxbuilts Ltd | Real estate | 2024 |
| Luxpand Ltd | Wholesale & retail | 2026 |
| Luxury Items (Cheshire) Ltd | Wholesale & retail | 2026 |
| LV Dental and Aesthetics Limited | Health & social care | 2025 |
| LV Engineering Limited | Construction | 2009 |
| Lyness Homes Ltd | Real estate | 2026 |
| Lynx CNC Ltd | Manufacturing | 2023 |
| Lytham Dental Limited | Health & social care | 2015 |
| M & H Swim School LLP | | 2017 |
| M & P Ashbrooke Horse & Jockey Limited | Hospitality | 2020 |
| M & R Hydraulics Limited | Professional & scientific | 2001 |
| M and a E Properties Ltd | Real estate | 2024 |
| M Heyes Transport Ltd | Transport & logistics | 2015 |
| M J C Newbould Limited | Health & social care | 2014 |
| M J Lavin Plant Sales Ltd | Administrative & support | 2024 |
| M Nails Ltd | Other services | 2025 |
| M P S L Planning & Design Limited | Professional & scientific | 1999 |
| M Plus Ltd | Other services | 2026 |
| M S Clinic Limited | Health & social care | 2021 |
| M Shenton Property Ltd | Real estate | 2024 |
| M&A Clothing Ltd | Wholesale & retail | 2026 |
| M&S Property (Cheshire) Ltd | Hospitality | 2023 |
| M. Cavanagh Digital Consultancy Ltd. | Information & communication | 2015 |
| M22 Online Ltd | Professional & scientific | 2023 |
| M2J Group Limited | Energy | 2024 |