| Lintbells Health Ltd | Financial services | 2017 |
| Lintbells Limited | Manufacturing | 2006 |
| Lion Gate Capital Limited | Real estate | 2025 |
| Lion Gate UK Capital Limited | Real estate | 2025 |
| Lion Parking Ltd | Transport & logistics | 2025 |
| LION8 Limited | Administrative & support | 2018 |
| Lionheart Freestyle Academy Ltd | Arts & recreation | 2020 |
| Lionsgate Logistics Ltd | Administrative & support | 2018 |
| Lionsgate Protection Limited | Administrative & support | 2019 |
| Liotwin Ltd | Agriculture & fishing | 2025 |
| Liou Limited | Wholesale & retail | 2025 |
| Lipovanu Trans Ltd | Transport & logistics | 2016 |
| Lippys Cafe Ltd | Hospitality | 2025 |
| Liquid Living Limited | Real estate | 2025 |
| Lirkapiti Limited | Transport & logistics | 2021 |
| Lisa Lawrie Limited | Administrative & support | 2012 |
| Lishan International Trade Co., Ltd | Wholesale & retail | 2021 |
| Lisselton London Limited | Health & social care | 2022 |
| Lite Cart Ltd | Wholesale & retail | 2026 |
| Lite IT UP Ltd | Information & communication | 2021 |
| Litmon Investments Ltd | Real estate | 2016 |
| Liton Group Ltd | Hospitality | 2019 |
| Little Bells London Limited | Wholesale & retail | 2025 |
| Little Cave Limited | Wholesale & retail | 2020 |
| Little Cubs U.K. Limited | Health & social care | 2023 |
| Little Marsh Road (Management Company) Limited | Real estate | 2022 |
| Little Rainbow Childcare Limited | Health & social care | 2017 |
| Little Revel END Limited | Arts & recreation | 2022 |
| Little Soak Ltd | Wholesale & retail | 2026 |
| Little Wonders Day Care Ltd | Health & social care | 2019 |
| LIV for Pets Ltd | Other services | 2018 |
| Live Earth Options Investments Limited | Financial services | 2007 |
| Live JOB Limited | Administrative & support | 2025 |
| Live Together Limited | Education | 2017 |
| Live Wire Installations Ltd | Construction | 2018 |
| LIVE1 Ltd | Information & communication | 2020 |
| LIVE360TV Ltd | Information & communication | 2024 |
| Lived Expert | Administrative & support | 2023 |
| Liveinthetee Ltd | Professional & scientific | 2025 |
| Livelloo Homeware Ltd | Wholesale & retail | 2026 |
| Lively Gems Ltd | Manufacturing | 2024 |
| Living Vizuri HMO Ltd | Real estate | 2023 |
| Living Well Homecare Ltd | Health & social care | 2014 |
| Living With Hearing Loss CIC | Wholesale & retail | 2021 |
| Liviu SIE Transport Ltd | Transport & logistics | 2019 |
| Livmore Interiors Ltd | Construction | 2025 |
| Liyf Holdings Ltd | Health & social care | 2025 |
| Lizbas Ltd | Health & social care | 2022 |
| Lizzy Health Care Ltd | Health & social care | 2018 |
| LJC Consultants Limited | Professional & scientific | 2018 |
| LJJ Construction Ltd | Construction | 2023 |
| LK Construction & Utilities Ltd | Construction | 2026 |
| LK Food and Wine Ltd | Wholesale & retail | 2018 |
| Lk&K Property Ltd | Real estate | 2025 |
| LKO Maintenance Limited | Other services | 2019 |
| Lkstrade Ltd | Wholesale & retail | 2026 |
| Llazo Ltd | Construction | 2021 |
| LLC Motor Trading UK Ltd | Wholesale & retail | 2018 |
| Llenti Limited | Wholesale & retail | 2026 |
| Llfi Grocers Limited | Wholesale & retail | 2018 |
| Lloyd Build Limited | Construction | 2023 |
| Lloyds M&E Ltd | Manufacturing | 2025 |
| LM Motor Centre Ltd | Wholesale & retail | 2025 |
| LM Transport Ltd | Transport & logistics | 2016 |
| LM Valley Property Limited | Construction | 2025 |
| LMJ Accountants Limited | Professional & scientific | 2014 |
| LML Holdings Ltd | Real estate | 2019 |
| LMN 2002 Ltd | Financial services | 2020 |
| LMS Builders Ltd | Construction | 2022 |
| LNC Trans Limited | Transport & logistics | 2024 |
| Lncatering Ltd | Hospitality | 2025 |
| LNG Performance Ltd | Real estate | 2024 |
| LNK Management Limited | Construction | 2026 |
| LNT- Damsel Limited | Health & social care | 2023 |
| Load FLY Ltd | Transport & logistics | 2023 |
| Load Research Limited | Information & communication | 2004 |
| Loaddeliverysafe Ltd | Transport & logistics | 2024 |
| Loaded Donner Luton Ltd | Hospitality | 2023 |
| Loadex Logistics Ltd | Transport & logistics | 2025 |
| Loadx Ltd | Transport & logistics | 2018 |
| Loavish Ltd | Information & communication | 2026 |
| Lobbay Ltd | Wholesale & retail | 2025 |
| Loca Group Limited | Administrative & support | 2017 |
| Local Carpets & Flooring Ltd | Wholesale & retail | 2023 |
| Local GAS Solutions Ltd | Construction | 2018 |
| Local Support Network | Health & social care | 2015 |
| Localhandyman.Co.Uk Ltd | Construction | 2025 |
| Localscope Limited | Administrative & support | 2026 |
| Locfet Ltd | Health & social care | 2015 |
| Lochessy Ltd | Health & social care | 2011 |
| Lockedincl Limited | Wholesale & retail | 2026 |
| Lockshill Healthcare Company Limited | Health & social care | 2015 |
| Locums Direct Limited | Other services | 2009 |
| Lodestone Golden Limited | Real estate | 2025 |
| Lodhi's Flooring Ltd | Construction | 2024 |
| Loftandladders Ltd | Manufacturing | 2014 |
| Lofty Healthcare Limited | Wholesale & retail | 2019 |
| Logical Logistics Limited | Transport & logistics | 2018 |
| Logicbyte Technologies Limited | Information & communication | 2004 |
| Logicom Online Limited | Information & communication | 2001 |