| Layjo Ltd | Wholesale & retail | 2023 |
| Lbcompany LLP | | 2025 |
| LBM Network Ltd | Information & communication | 2022 |
| LBS Consulting Limited | Professional & scientific | 2025 |
| LC Apps Ltd | Information & communication | 2025 |
| LCJ Consulting Ltd | Professional & scientific | 2023 |
| LCK Digital Ltd | Professional & scientific | 2026 |
| LCW Invest L.P. | | 2018 |
| LDN Bars Ltd | Hospitality | 2021 |
| LDN HQ Ltd | Hospitality | 2024 |
| LDN Operations Ltd | Hospitality | 2025 |
| Ldvita Ltd | Information & communication | 2024 |
| LE Collectioniste Ltd | Other services | 2021 |
| LE Remede Ltd | Wholesale & retail | 2023 |
| Lead D’Europe Ltd | Wholesale & retail | 2024 |
| Lead Experts Limited | Professional & scientific | 2023 |
| Lead Funnel Marketing Ltd | Professional & scientific | 2022 |
| Leader Kingdom Business School Ltd | Information & communication | 2025 |
| Leadership and Sport Ltd | Information & communication | 2025 |
| Leadership Ready Ltd | Professional & scientific | 2025 |
| Leadstar Import L.P. | | 2019 |
| Leafy Plants CIC | Health & social care | 2024 |
| Lealey Limited | Administrative & support | 2019 |
| Leap ERA Ltd | Wholesale & retail | 2025 |
| Leashaw Limited | Real estate | 2023 |
| Lebliss Health Ltd | Wholesale & retail | 2025 |
| Ledcetera Ltd | Wholesale & retail | 2024 |
| Ledgerpath Ltd | Professional & scientific | 2026 |
| Ledo Concept Ltd | Wholesale & retail | 2022 |
| LEE Snowdon Limited | Wholesale & retail | 2010 |
| LEE Wood Valley Community Interest Company | Arts & recreation | 2024 |
| Leenas Occasions Ltd | Professional & scientific | 2023 |
| Left Hook Learning Limited | Education | 2023 |
| Legacy Line Ventures Ltd | Wholesale & retail | 2023 |
| Legacy Living Properties Ltd | Real estate | 2023 |
| Legend IT Ltd | Information & communication | 2009 |
| Lehigh Consulting Ltd | Professional & scientific | 2025 |
| Leighton Networks L.P. | | 2017 |
| Leizhang Studio Limited | Information & communication | 2025 |
| Lelejoy Limited | Wholesale & retail | 2025 |
| Lellow Labs Ltd | Manufacturing | 2026 |
| Lemen Cross-Border Trade Co., Ltd | Wholesale & retail | 2026 |
| Lemofack Services Ltd | Administrative & support | 2026 |
| Lemon Ginger Limited | Other services | 2024 |
| Lemur Tango Games Ltd | Information & communication | 2026 |
| Lentra Limited | Hospitality | 2025 |
| Leonmidgard Ltd | Wholesale & retail | 2023 |
| Leopard Web Limited | Administrative & support | 2016 |
| Lepox Ltd | Construction | 2013 |
| Lerina Limited | Extraterritorial | 2018 |
| Lesnic Abrasive Limited | Wholesale & retail | 2026 |
| Lessington Invest 2025 Ltd | Real estate | 2025 |
| Let's Nail Energy LLP | | 2025 |
| Letters to Africa CIC | Education | 2025 |
| Level UP Products Ltd | Real estate | 2025 |
| Levent Global Ltd | Wholesale & retail | 2021 |
| Lewis Technologies Ltd | Information & communication | 2024 |
| Lewt.Gg Ltd | Information & communication | 2026 |
| Lexpro Invest L.P. | | 2018 |
| LFR Wembley Limited | Manufacturing | 2004 |
| Lhcm Group Ltd | Financial services | 2025 |
| Lhpa Homes Limited | Real estate | 2024 |
| Lhpr Ltd | Professional & scientific | 2026 |
| Libby Health & Wellness Limited | Health & social care | 2025 |
| Liberty Invest Group Limited | Real estate | 2024 |
| Librabell Ltd | Other services | 2023 |
| Liburd Elite Ltd | Arts & recreation | 2023 |
| Licence Office Ltd | Information & communication | 2025 |
| Licona Ltd | Wholesale & retail | 2021 |
| Licordelaquinta Limited | Wholesale & retail | 2025 |
| Life Begins at Midlife Ltd | Professional & scientific | 2025 |
| Lifeaid Honduras Limited | Other services | 2026 |
| Life’S BIN Good Ltd | Administrative & support | 2023 |
| Lift & Press Ltd | Wholesale & retail | 2020 |
| Lift&Leaf Ltd | Wholesale & retail | 2025 |
| Liftech Products Ltd. | Hospitality | 2014 |
| Lightpear Solutions Ltd | Information & communication | 2016 |
| Lights, Cymru, Action Ltd | Information & communication | 2024 |
| Lily Charmed Ltd. | Wholesale & retail | 2006 |
| Limbotenai Limited | Wholesale & retail | 2025 |
| Lime Hospitality Management (Warrington) Ltd | Hospitality | 2025 |
| Limee Network Ltd | Information & communication | 2025 |
| Liminal Exist Ltd | Professional & scientific | 2025 |
| Limitless Getaways Ltd | Administrative & support | 2024 |
| Limitless Innovations Ltd | Construction | 2022 |
| Limitless Trading Services Ltd | Education | 2025 |
| Limtless Lift OFF Events Ltd | Other services | 2025 |
| Lina Global Limited | Wholesale & retail | 2025 |
| Lincolnshire Accountancy & Consulting Ltd | Professional & scientific | 2024 |
| Lincs Fire Safety Ltd | Financial services | 2022 |
| Linden Grange Properties Ltd | Real estate | 2026 |
| Line Rate IT Ltd | Information & communication | 2025 |
| Linemark Limited | Professional & scientific | 1999 |
| Lineup Construction Specialists Limited | Construction | 2018 |
| Lingfield Asset Management Limited | Construction | 2023 |
| Lingua Craft Ltd | Wholesale & retail | 2023 |
| Linguaproof Ltd | Information & communication | 2024 |
| Links Marketing Limited | Wholesale & retail | 2025 |
| Linomus Ltd | Wholesale & retail | 2021 |
| Linuscent Ltd | Information & communication | 2025 |