| Lealton Systems Ltd | Information & communication | 2025 |
| Leap Savvy Savers Ltd | Education | 2024 |
| Learn With Mobile Limited | Information & communication | 2015 |
| Learningbook Ltd | Education | 2012 |
| Leasingcom Ltd | Extraterritorial | 2016 |
| Leasingdotcom Ltd | Extraterritorial | 2015 |
| LED Technologies Ltd | Wholesale & retail | 2008 |
| Lenart Ltd | Information & communication | 2018 |
| Leon Design & Build Limited | Construction | 2024 |
| LES Dennis Limited | Arts & recreation | 2015 |
| Let's Go Catering Limited | Hospitality | 2018 |
| Let's Make & DO Ltd | Wholesale & retail | 2024 |
| Letterbox Beauty Limited | Wholesale & retail | 2020 |
| Levant Street Food Ltd | Hospitality | 2017 |
| Levedale Limited | Professional & scientific | 2011 |
| Level Seven (Cheshire) Limited | Arts & recreation | 2021 |
| Lewis Access Ltd | Manufacturing | 2020 |
| LEX Specialis Ltd | Professional & scientific | 2020 |
| Lexp Ltd | Administrative & support | 2026 |
| Liaise Business Services Limited | Real estate | 2022 |
| Libet Control Solutions Ltd | Construction | 2023 |
| Life&Soul Ltd | Hospitality | 2017 |
| Life&Soul Management Limited | Hospitality | 2023 |
| Lifestyle Choices Group Ltd | Information & communication | 2022 |
| Lightbuzz Limited | Professional & scientific | 2010 |
| Lightech Sound & Light Ltd | Administrative & support | 2002 |
| Lightfoot Renewables Ltd | Professional & scientific | 2026 |
| Lightwood Entertainment & Experiences Limited | Arts & recreation | 2024 |
| Limpet Marketing Limited | Other services | 1993 |
| Lindale Consulting Limited | Professional & scientific | 2022 |
| Lindow Landscaping Limited | Administrative & support | 2014 |
| Lingle Limited | Professional & scientific | 2014 |
| Link Wray Ltd | Information & communication | 2021 |
| Linny Limited | Professional & scientific | 2015 |
| Linquartz (2) Limited | Manufacturing | 2013 |
| Liquid Care Services Limited | Health & social care | 2023 |
| Liquidigloo Ltd | Administrative & support | 2005 |
| Lisa Cowen Photography Limited | Professional & scientific | 2012 |
| Little Bean Coffee Bar Ltd | Hospitality | 2026 |
| Little Monkeys Holmes Chapel Limited | Health & social care | 2026 |
| Little Sticks Forest School Ltd | Health & social care | 2019 |
| Littlemoor Court Management Company Limited | Households | 2004 |
| Lizand Limited | Professional & scientific | 2012 |
| Lizard Surf Sports Ltd | Wholesale & retail | 2015 |
| Lkmr Group Ltd | Manufacturing | 2026 |
| LMA Contract Flooring Ltd | Construction | 2017 |
| LNM Propco Limited | Real estate | 2023 |
| Loachbrook Ltd | Professional & scientific | 2021 |
| Load & Go Waste Services Limited | Water & waste | 2017 |
| Load Integrity Ltd | Professional & scientific | 2025 |
| Local Life Online Ltd | Professional & scientific | 2020 |
| Locum VET Staff Limited | Professional & scientific | 2014 |
| LOGIC9 Ltd | Information & communication | 2020 |
| Logistics 24-7 Limited | Transport & logistics | 2024 |
| Logun International Limited | Extraterritorial | 2017 |
| Lomita Limited | Professional & scientific | 2018 |
| Lomox Limited | Manufacturing | 2007 |
| Longsdon Developments Ltd | Construction | 2021 |
| Longstone Property Developments Ltd | Real estate | 2020 |
| Longtail Consultancy Ltd | Professional & scientific | 2024 |
| Longworth Technology Limited | Information & communication | 2023 |
| Lonstile Limited | Professional & scientific | 2012 |
| Lordex Ltd | Manufacturing | 2018 |
| LOS Jefes Limited | Professional & scientific | 2013 |
| LOS Romeros Limited | Professional & scientific | 2009 |
| Lottie Lashes Limited | Wholesale & retail | 2020 |
| Loungemore Ltd | Wholesale & retail | 2023 |
| Love ALL of YOU Limited | Other services | 2020 |
| Lovelive Graphics Ltd | Professional & scientific | 2014 |
| Lovelive Group Ltd | Financial services | 2020 |
| Loving U Limited | Wholesale & retail | 2023 |
| Lower Heath Chip Shop Ltd | Hospitality | 2023 |
| Lower Peak Holdings Limited | Manufacturing | 2018 |
| Loyal Yarns UK Ltd | Wholesale & retail | 2024 |
| Lrmjd Ltd | Real estate | 2024 |
| LT Hospitality Limited | Hospitality | 2025 |
| LTW Property Ltd | Real estate | 2026 |
| Lucie Morgan Studio Ltd | Professional & scientific | 2023 |
| Lucie Watson Photography Limited | Professional & scientific | 2022 |
| Lucien Cooper Ltd | Arts & recreation | 2023 |
| Luckypulltcg Limited | Wholesale & retail | 2026 |
| Lucy Boka PUB Limited | Hospitality | 2025 |
| Lucy Legal Limited | Professional & scientific | 2020 |
| Lukrativ Concepts Ltd | Manufacturing | 2016 |
| Lumley Road Developments LLP | | 2021 |
| Luxhub Ltd | Real estate | 2020 |
| Luxury Hub Group Ltd | Construction | 2019 |
| M a B Joinery & Construction Limited | Construction | 2021 |
| M C Designs (North West) Ltd | Manufacturing | 2014 |
| M G Plumbing Services Ltd | Construction | 2008 |
| M Gaunt Electrical Installations Ltd | Construction | 2025 |
| M Green Automotive Ltd | Wholesale & retail | 2026 |
| M H Furniture Holdings Ltd | Wholesale & retail | 2016 |
| M Long Building Ltd | Construction | 2016 |
| M S C Builders Limited | Construction | 2003 |
| M&A Medical Aesthetics Ltd | Health & social care | 2022 |
| M&K Property LLP | | 2026 |
| M-Tech Connect Ltd | Professional & scientific | 2020 |
| M3 Media Group Limited | Professional & scientific | 2021 |
| Macclesfield Paints Limited | Wholesale & retail | 1980 |