| KWF Aesthetics and Skin Clinic Ltd | Other services | 2026 |
| Kwikpick Solutions Limited | Other services | 2015 |
| Kwiktrak (UK) Limited | Wholesale & retail | 2010 |
| KWR Technologies Limited | Financial services | 2010 |
| L & I Pubs Co Limited | Hospitality | 2013 |
| L & L Joinery Limited | Construction | 2020 |
| L & T Nails Beauty Ltd | Other services | 2023 |
| L a Procter Properties Ltd | Real estate | 2020 |
| L J H Construction Services Limited | Professional & scientific | 2017 |
| L&P Hall Ltd | Professional & scientific | 2024 |
| L&Wa Limited | Administrative & support | 2024 |
| L'Assaggino Limited | Hospitality | 2017 |
| L. C. Consulting & Training Solutions Ltd | Professional & scientific | 2011 |
| L. Fitton Limited | Other services | 2006 |
| L.A. Harford Electrical Ltd | Construction | 2023 |
| L.A.P.E. Transport Ltd | Administrative & support | 2017 |
| L.A.S Fencing Ltd | Administrative & support | 2025 |
| L.A.W. Construction (NW) Limited | Construction | 2003 |
| L.Marsh Limited | Extraterritorial | 2010 |
| LA Coffee Ltd | Hospitality | 2023 |
| LA Rocca Ristorante Limited | Hospitality | 2016 |
| LA VIE Royale Concierge Limited | Wholesale & retail | 2025 |
| LAB 814 Ltd | Hospitality | 2023 |
| Labels & Logos Limited | Manufacturing | 2023 |
| LAC Future Limited | Hospitality | 2024 |
| Lace Lounge Limited | Hospitality | 2017 |
| Lacoustics (NW) Limited | Construction | 2011 |
| Ladderguard Limited | Manufacturing | 2018 |
| Ladybiker Limited | Wholesale & retail | 2017 |
| LAE Acquisitions Limited | Administrative & support | 2012 |
| LAE Enviromental Ltd | Water & waste | 2025 |
| LAE Vehicle Rental Limited | Administrative & support | 2008 |
| LAE Welfare Solutions Ltd | Administrative & support | 2021 |
| Lagan's Group Holdings Limited | Financial services | 2022 |
| Lagan's Haven Limited | Health & social care | 2022 |
| Lagan's Healthcare Limited | Health & social care | 2022 |
| Lagoa Café Ltd | Hospitality | 2021 |
| Laidiesai Ltd | Information & communication | 2025 |
| Lairds House Northumberland Limited | Hospitality | 2019 |
| Lake District Granite Limited | Mining & quarrying | 2022 |
| Lakeland Carpentry Ltd | Construction | 2025 |
| Lakeland Farm Ltd | Agriculture & fishing | 2019 |
| Lakeland Investments (Bouth) Ltd | Real estate | 2018 |
| Lakeland Prestige Properties Ltd | Real estate | 2025 |
| Lakeland Sofas by Edward James Ltd | Wholesale & retail | 2019 |
| Lakeland Verandahs Franchising Limited | Construction | 2020 |
| Lakeland Verandahs UK Limited | Construction | 2022 |
| Lakes Electrical Supplies Limited | Wholesale & retail | 2016 |
| Lakes Training Services Ltd | Administrative & support | 2024 |
| Lakeside Hotel Windermere Limited | Extraterritorial | 2005 |
| Lala Pizzeria Ltd | Hospitality | 2020 |
| Lambda Calibration Limited | Administrative & support | 1993 |
| Lambs (UK) Telecoms Ltd | Construction | 2020 |
| Lambs RD Ltd | Real estate | 2026 |
| Lammack Technology Limited | Professional & scientific | 2003 |
| Lanacre Professional Tree Care Ltd | Administrative & support | 2014 |
| Lancashire Bespoke Plastering Limited | Construction | 2015 |
| Lancashire Children's Football LLP | | 2016 |
| Lancashire Energy Ltd | Professional & scientific | 2023 |
| Lancashire Express Deliveries Ltd | Transport & logistics | 2022 |
| Lancashire Facade Installations Limited | Construction | 2013 |
| Lancashire Garage Conversions Limited | Construction | 2021 |
| Lancashire Haulage Solutions Ltd | Transport & logistics | 2023 |
| Lancashire Land Group Limited | Financial services | 2015 |
| Lancashire Land Investments Limited | Real estate | 2016 |
| Lancashire Land Limited | Real estate | 2016 |
| Lancashire Lifting Limited | Administrative & support | 2025 |
| Lancashire Luxury Developments Limited | Construction | 2013 |
| Lancashire Machinery Ltd | Manufacturing | 2021 |
| Lancashire MAN and Van Ltd | Transport & logistics | 2025 |
| Lancashire One Limited | Administrative & support | 2006 |
| Lancashire Pest Control Limited | Administrative & support | 2020 |
| Lancashire Plant Services Ltd | Professional & scientific | 2019 |
| Lancashire Roofing and Pointing Ltd | Construction | 2019 |
| Lancashire Roofing Limited | Construction | 2017 |
| Lancashire S12 Limited | Health & social care | 2021 |
| Lancashire Shopfronts Ltd | Manufacturing | 2014 |
| Lancashire Vintage China Hire Ltd | Other services | 2018 |
| Lancashire Waste Services Limited | Manufacturing | 2006 |
| Lancel Consulting Limited | Information & communication | 2015 |
| Lancrose Holdings Limited | Financial services | 2021 |
| Lancrose Limited | Professional & scientific | 2017 |
| Lancspubgroup Ltd | Hospitality | 2024 |
| Landfill Projects Limited | Construction | 2011 |
| Landspect Ltd | Information & communication | 2022 |
| Langley Energy Supply Limited | Energy | 2025 |
| Lanley Developments Limited | Construction | 1988 |
| Lannstac Drivers Ltd | Transport & logistics | 2026 |
| Lapwing Antiques Ltd | Wholesale & retail | 2018 |
| Lars Cars Ltd | Transport & logistics | 2015 |
| LAS Trans Ltd | Transport & logistics | 2017 |
| Lasante Consulting Ltd | Information & communication | 2022 |
| Laser & Beauty by Gemma Limited | Other services | 2025 |
| Laser Medica Limited | Health & social care | 2013 |
| LASTMILE24 Ltd | Transport & logistics | 2025 |
| Latchum Heritage Wealth Management Ltd | Financial services | 2022 |
| Laterlife Law Limited | Professional & scientific | 2025 |
| Latitude Studios Limited | Professional & scientific | 2012 |
| Laugherne Limited | Real estate | 2023 |
| Laura Hartley Consultancy Limited | Professional & scientific | 2019 |