| Laksevics Thomason Limited | Construction | 2022 |
| LAL Consultants Limited | Financial services | 2017 |
| Lali Ventures Ltd | Professional & scientific | 2022 |
| Lalo Cutz Ltd | Other services | 2025 |
| Lalu Freight Trans Ltd | Transport & logistics | 2017 |
| Lamash Tech Limited | Information & communication | 2020 |
| Lambda Projects Limited | Professional & scientific | 2004 |
| Lamborghini Smiles Ltd | Transport & logistics | 2025 |
| Lambourne Place Management Ltd | Households | 2026 |
| Lambretta Asia Limited | Wholesale & retail | 2021 |
| Lambretta Distribution Limited | Professional & scientific | 2009 |
| Lambretta Franchising Limited | Professional & scientific | 2009 |
| Lambretta India Limited | Professional & scientific | 2024 |
| Lambretta Licensing Limited | Professional & scientific | 2004 |
| Lambretta Operations Limited | Professional & scientific | 2013 |
| Lambretta Sales Limited | Wholesale & retail | 2021 |
| Lambretta Scooters Limited | Professional & scientific | 2021 |
| Lamey & HOW Housing Ltd | Real estate | 2025 |
| Lami Afri-Wear Limited | Health & social care | 2014 |
| Lamira Limited | Transport & logistics | 2020 |
| Lammas School Limited | Education | 2010 |
| Lamont-Doyle Ltd | Financial services | 2026 |
| Lampholder 2000 Ltd | Manufacturing | 1996 |
| Lamps, Tubes and Lighting Limited | Wholesale & retail | 1996 |
| Lamsa Care Ltd | Health & social care | 2020 |
| Lana Studio Ltd | Wholesale & retail | 2025 |
| Lancaster B Ltd | Construction | 2026 |
| Lancaster Collective Ltd | Real estate | 2025 |
| Lancaster Drive Services Limited | Extraterritorial | 2018 |
| Lancaster Gate (LC) Limited | Real estate | 2023 |
| Lancaster Manor (Goulsbra Road Rushden) Management Company Limited | Households | 2013 |
| Land & Planning Consultants Ltd | Professional & scientific | 2021 |
| Land Based Assessment Limited | Education | 2017 |
| Land Based Learning Limited | Education | 2013 |
| Landau Management Limited | Households | 1989 |
| Landex Commercial and Educational Services Limited | Education | 2012 |
| Landex Land Based Colleges Aspiring to Excellence | Education | 2006 |
| Landmark Estates Bedworth Ltd | Real estate | 2020 |
| Landmark Estates Cheetham Ltd | Construction | 2019 |
| Landmark Estates Development Ltd | Construction | 2018 |
| Landmark Estates Hagley Ltd | Construction | 2019 |
| Landmark Estates Hinckley Ltd | Construction | 2019 |
| Landmark Estates Holloway Birmingham Ltd | Construction | 2019 |
| Landmark Estates LTS Newtown Ltd | Construction | 2019 |
| Landmark Estates Manor Court Ltd | Construction | 2020 |
| Landmark Estates Marhamchurch Ltd | Construction | 2018 |
| Landmark Estates Mayben Ltd | Construction | 2019 |
| Landmark Estates Mayben Three Ltd | Real estate | 2025 |
| Landmark Estates Mayben Two Ltd | Construction | 2019 |
| Landmark Estates Nuneaton Limited | Construction | 2018 |
| Landmark Estates Polbathic Ltd | Construction | 2019 |
| Landmark Estates Shebbear Ltd | Construction | 2019 |
| Landmark Estates Wadebridge Ltd | Construction | 2018 |
| Landsbury Investments Limited | Construction | 2026 |
| Landsdowne Consultants Ltd | Professional & scientific | 2020 |
| Lanes Ecommerce Ltd | Wholesale & retail | 2026 |
| Lanes Employment Solution Specialists Ltd | Professional & scientific | 2018 |
| Langage 10 Renewables Holdco Ltd | Professional & scientific | 2023 |
| Langage 10 Renewables Ltd | Administrative & support | 2023 |
| Langdon Court Manor Ltd | Hospitality | 2016 |
| Langford IT Services Ltd | Information & communication | 2018 |
| Langham Consultants Limited | Information & communication | 2025 |
| Language Preference Ltd | Professional & scientific | 2014 |
| Lanooka Limited | Information & communication | 2010 |
| Lantana Consultancy Ltd | Professional & scientific | 2018 |
| Lantern Davis Limited | Professional & scientific | 2022 |
| Lantern Grove Ltd | Health & social care | 2026 |
| Lapkovskis Ltd | Wholesale & retail | 2025 |
| Lappo Trans Ltd | Transport & logistics | 2019 |
| Larna Ltd | Wholesale & retail | 2025 |
| Larry Benedict Healthcare Limited | Health & social care | 2014 |
| Larry Jordan Electrical Company Limited | Construction | 2014 |
| Lary Trans Ltd | Transport & logistics | 2015 |
| Larza Ltd | Information & communication | 2026 |
| Lasa Logistics Ltd | Transport & logistics | 2025 |
| Laser EYE Consultancy Limited | Health & social care | 2013 |
| Laser Solutions Limited | Professional & scientific | 2025 |
| Lasergraph and Pyrosupport Ltd | Arts & recreation | 2021 |
| Laserline AUS Limited | Wholesale & retail | 2021 |
| Lashed by Soph Ltd | Other services | 2023 |
| Last Stage Finishers Ltd | Administrative & support | 2008 |
| Laszlo Ltd | Information & communication | 2022 |
| LAT Group Ltd | Transport & logistics | 2017 |
| Latimer Associates (U.K) Limited | Administrative & support | 1997 |
| Latimer Land (Braintree) Limited | Real estate | 2000 |
| Latimer Land (Luton) Limited | Real estate | 2000 |
| Latimer Land (Stroud) Limited | Real estate | 2000 |
| Latimer Land Management Limited | Real estate | 2000 |
| Latimer Restaurant Limited | Hospitality | 2014 |
| Latitude Property Services Limited | Real estate | 2023 |
| Latmet Fabrications Ltd | Professional & scientific | 2016 |
| Latymer Properties Limited | Real estate | 2026 |
| Lauda Trading Limited | Wholesale & retail | 2012 |
| Launchpadd UP Ltd | Construction | 2017 |
| Launton Residents Management Company Limited | Real estate | 2020 |
| Laur Ltd | Construction | 2026 |
| Laura Allen Make UP Ltd | Other services | 2018 |
| Laurag Ltd | Manufacturing | 2020 |
| Laurence Capital Limited | Financial services | 2021 |
| Laurence Simons Limited | Administrative & support | 2025 |