| L Farrow Consulting Services Limited | Professional & scientific | 2009 |
| L G Cranes Ltd | Wholesale & retail | 2021 |
| L I H Trans Limited | Transport & logistics | 2017 |
| L I Legrand Consulting Ltd | Professional & scientific | 2015 |
| L J M Financial Services Ltd | Financial services | 2021 |
| L K Accounts Ltd | Professional & scientific | 2015 |
| L L D Services Limited | Construction | 2013 |
| L Mannering Projects Ltd | Manufacturing | 2024 |
| L N H Investments Limited | Extraterritorial | 2018 |
| L R S Consultants Limited | Information & communication | 2010 |
| L T Baldwin Holdings Limited | Financial services | 2022 |
| L T Baldwin Transport Limited | Transport & logistics | 2002 |
| L&C Recovery Limited | Transport & logistics | 2022 |
| L&C Recruitment Limited | Administrative & support | 2019 |
| L. Crawford Services Ltd | Wholesale & retail | 2024 |
| L.A.R.K Carpentry Ltd | Construction | 2018 |
| L.Tec Limited | Wholesale & retail | 2023 |
| L2SQUARED Ltd | Health & social care | 2022 |
| LA & SON Investment Ltd | Real estate | 2020 |
| LA Cara Ltd | Administrative & support | 2013 |
| LA Favela Ltd | Hospitality | 2025 |
| LA Fire Stopping Ltd | Administrative & support | 2021 |
| LA Moda Bags London Limited | Wholesale & retail | 2013 |
| LA Treats Services Limited | Health & social care | 2015 |
| LA Vogue London Ltd | Wholesale & retail | 2025 |
| La'Belle Skinstudio Limited | Other services | 2022 |
| Labbyrod Global Limited UK Limited | Manufacturing | 2020 |
| Labtos Charcoal Merchant Limited | Mining & quarrying | 2017 |
| Labtrad Homes & Investments Ltd | Real estate | 2016 |
| Lacrosoft Limited | Wholesale & retail | 2025 |
| Lade Advanced Aesthetics Ltd | Other services | 2026 |
| LAE LAE Limited | Wholesale & retail | 2023 |
| LAG Trans Ltd | Transport & logistics | 2018 |
| Lagtransport Ltd | Transport & logistics | 2019 |
| Lahk Consulting Ltd | Professional & scientific | 2024 |
| Laikam Limited | Manufacturing | 2015 |
| LAJ Services Ltd | Transport & logistics | 2022 |
| Lajkonik Ltd | Transport & logistics | 2019 |
| Lakefront Developments Limited | Real estate | 2020 |
| Lakefront Holdings Limited | Financial services | 2024 |
| Lakefront Properties Limited | Real estate | 2025 |
| Lakeside & Purfleet Taxis Limited | Transport & logistics | 2007 |
| Lakeside Area Limited | Professional & scientific | 2009 |
| Lakeside Carcentre Limited | Wholesale & retail | 2024 |
| Lakeside Carpet & Flooring Supplies Ltd | Wholesale & retail | 2024 |
| Lakeside Carpet and Flooring Ltd | Wholesale & retail | 2017 |
| Lakeside Dental and Medical Clinic Ltd | Health & social care | 2023 |
| Lakeside Gifts Limited | Hospitality | 2021 |
| Lakeside Merchants Association Limited | Professional & scientific | 1991 |
| Lakeside Taxis and Cars Ltd | Transport & logistics | 2016 |
| Lakesideville Limited | Hospitality | 2025 |
| Lakshmi Oils Ltd | Wholesale & retail | 2026 |
| LAM Glazing Ltd | Construction | 2024 |
| Lamod Limited | Professional & scientific | 2012 |
| Lanbi Services Limited | Hospitality | 2015 |
| Land Pact Ltd | Information & communication | 2026 |
| Langdon Hills Golf and Country Club Limited | Arts & recreation | 2001 |
| Langdon Hills Golf Club | Arts & recreation | 2001 |
| Langs Tools & Industrial Supplies Limited | Wholesale & retail | 2008 |
| Langton House RTM Company Ltd | Households | 2020 |
| Lannister Investire Ltd | Real estate | 2021 |
| Lanre Foods Wholesale Limited | Wholesale & retail | 2025 |
| Lanzaish Event Solutions Ltd | Administrative & support | 2025 |
| Lark Property Holdings Limited | Real estate | 2019 |
| Lash Konsult Limited | Professional & scientific | 2015 |
| Lashed in Essex Ltd | Other services | 2019 |
| Lasi Ltd | Construction | 2017 |
| Lastminute Healthcare Services Limited | Administrative & support | 2016 |
| Launchflow UK Limited | Information & communication | 2026 |
| Laura Denise Ltd | Real estate | 2024 |
| Lauren Nicole Homes Limited | Construction | 2015 |
| Lawrencecold Ltd | Professional & scientific | 2019 |
| Lawseth Ltd | Extraterritorial | 2018 |
| Laya Photography Ltd | Wholesale & retail | 2020 |
| Layer 17 Ltd | Information & communication | 2025 |
| Lazrid Limited | Households | 2026 |
| Lazwood Limited | Construction | 2019 |
| LBP (UK) Ltd | Wholesale & retail | 2010 |
| LD Drive Ltd | Transport & logistics | 2015 |
| LD Maintenance Ltd | Construction | 2025 |
| LDC Construction Ltd | Construction | 2022 |
| Ldeconnect Ltd | Wholesale & retail | 2022 |
| LE Miel London Limited | Wholesale & retail | 2023 |
| LE Strategist Ltd. | Professional & scientific | 2019 |
| Leaf ND Root Ltd | Other services | 2025 |
| Learnify Partners Ltd | Information & communication | 2025 |
| Learning Fountain Limited | Other services | 2009 |
| Learnlogic Solutions Ltd | Administrative & support | 2023 |
| Leather Creations Limited | Wholesale & retail | 2019 |
| Leaua Logistics&Transport Ltd | Transport & logistics | 2026 |
| LEE Flowers Ltd | Wholesale & retail | 2016 |
| LEE Mallett Agencies Limited | Manufacturing | 2013 |
| Leech Professional Support Services Ltd | Administrative & support | 2019 |
| Lefkotrans Ltd | Transport & logistics | 2016 |
| Legacy Domain Limited | Health & social care | 2024 |
| Legal Advocates Ltd | Professional & scientific | 2023 |
| Legion Lifts Ltd | Construction | 2024 |
| Legion Ltd | Wholesale & retail | 2017 |
| Legno Limited | Construction | 2013 |
| Leighview Children's Care Ltd | Health & social care | 2024 |