| LA Group Developments Ltd | Construction | 2021 |
| LA Group Investment Ltd | Real estate | 2021 |
| LA Group Property Services Ltd | Real estate | 2021 |
| LA Isla Marlow Limited | Administrative & support | 2016 |
| LA Sagesse Limited | Administrative & support | 2013 |
| LA Stress Engineering Ltd | Professional & scientific | 2019 |
| LAA HR Consultancy Limited | Administrative & support | 2025 |
| Label RB Boutique Ltd | Wholesale & retail | 2026 |
| Labels OUT Ltd | Wholesale & retail | 2020 |
| Labinvesta Limited | Professional & scientific | 2009 |
| Laboratory Services Ltd | Administrative & support | 2024 |
| Lachjan Ltd | Construction | 2019 |
| Ladies Gardening Services Limited | Administrative & support | 2021 |
| Lady Joiner Ltd | Construction | 2026 |
| Ladyluxeperfume Ltd | Wholesale & retail | 2019 |
| Laevo Limited | Professional & scientific | 2023 |
| Lagado’S Restaurant & Grill Ltd | Hospitality | 2023 |
| Lagan 107 Limited | Construction | 1988 |
| Lagan 108 Limited | Construction | 1986 |
| Lagh Civil Engineering Design Services Limited | Administrative & support | 2014 |
| Laiba Global Goods Limited | Wholesale & retail | 2025 |
| Lake Bank Estate (Coniston) Limited | Households | 1972 |
| Lake Escapes Properties Limited | Real estate | 2018 |
| LAL Sher Limited | Hospitality | 2023 |
| Lallypa Management Services Ltd | Information & communication | 2024 |
| Lamb Lamb Lettings Limited | Real estate | 2024 |
| Lamb ROW Management Company Limited | Professional & scientific | 2010 |
| Lambert Draughting Limited | Administrative & support | 2012 |
| Lambs (UK) Utilities Ltd | Construction | 2025 |
| Lami Engineering Limited | Administrative & support | 2011 |
| Lamp Care Limited | Administrative & support | 2025 |
| Lams Tech Ltd | Information & communication | 2021 |
| LAN Process Limited | Administrative & support | 2014 |
| Lancashire & Cheshire Limited | Professional & scientific | 1996 |
| Lancashire & Yorkshire Railway Company Limited | Manufacturing | 2024 |
| Lancashire Aero Club Ltd | Other services | 2014 |
| Lancastrian Retail and Commercial Lettings Limited | Administrative & support | 2013 |
| Lancer Consultancy Ltd | Professional & scientific | 2019 |
| Land Based Training Solutions Limited | Education | 2026 |
| Land Trust Residential Services Limited | Administrative & support | 2016 |
| Landcrest Capital Ltd | Real estate | 2025 |
| Landlegend Limited | Construction | 2000 |
| Landlord Vision Ltd | Information & communication | 2013 |
| Landscape and Tile Show Limited | Other services | 2022 |
| Landscape Ecology Limited | Administrative & support | 2014 |
| Landscape Project Management Limited | Administrative & support | 2022 |
| Landside Associates Ltd | Professional & scientific | 2019 |
| Lane Burton Holdings Limited | Other services | 2023 |
| Lane Ends Podiatry Ltd | Health & social care | 2015 |
| Laneli Limited | Administrative & support | 2006 |
| Lanes Transport Consultancy Ltd | Transport & logistics | 2021 |
| Langden Investments Limited | Financial services | 2008 |
| Langfields (Warrington) Ltd | Manufacturing | 1984 |
| Langford Chase Solutions Ltd | Administrative & support | 2026 |
| Langmoon Limited | Administrative & support | 2012 |
| Langoptima Ltd | Information & communication | 2025 |
| Langtree Daresbury Limited | Real estate | 2010 |
| Langtree First Step Limited | Construction | 2025 |
| Langtree Group Holdings Limited | Financial services | 2024 |
| Langtree Property Partners Holdings Limited | Financial services | 2019 |
| Langtree Property Partners Limited | Real estate | 2014 |
| Lanham Consultancy Limited | Administrative & support | 2017 |
| Lantern Management Services Limited | Administrative & support | 2015 |
| Lanthanideas Ltd | Professional & scientific | 2023 |
| Lapira Company Ltd | Information & communication | 2022 |
| Laposa IT Consulting Limited | Information & communication | 2013 |
| Lapwing Mechanical Ltd | Professional & scientific | 2019 |
| LAR Solutions Limited | Real estate | 2023 |
| Larches Design Ltd | Administrative & support | 2024 |
| Lares Interiors Ltd | Professional & scientific | 2023 |
| Large Property Management Services Ltd | Households | 2024 |
| Larklain Consulting Limited | Professional & scientific | 2025 |
| Larkspur Books Limited | Information & communication | 2025 |
| Larkspur Rental Limited | Households | 2025 |
| Larkspur WB Limited | Wholesale & retail | 2025 |
| LAS Ramblas Wine and Tapas Limited | Hospitality | 2017 |
| Laser Loot Ltd | Administrative & support | 2023 |
| Laser Ranging Limited | Manufacturing | 2026 |
| Lash Enchantment Ltd | Wholesale & retail | 2026 |
| Laskey Farm Limited | Real estate | 1996 |
| Laskey Properties Limited | Real estate | 2016 |
| Lasso Productions Limited | Arts & recreation | 2013 |
| Lasso Properties Limited | Real estate | 2017 |
| Last Slate Video Ltd | Information & communication | 2025 |
| Lasting Memories Wedding and Events Limited | Professional & scientific | 2021 |
| Lasy UK Ltd | Education | 2022 |
| Latchford Dental Practice Ltd. | Health & social care | 2007 |
| Latchford Physiotherapy Ltd | Health & social care | 2017 |
| Latchford Street Property Limited | Real estate | 2023 |
| Latif H Properties Ltd | Real estate | 2021 |
| Latimer Eica Services Ltd | Administrative & support | 2024 |
| Latitude Logistics Ltd | Transport & logistics | 2020 |
| Latour Solutions Limited | Administrative & support | 2015 |
| Lattice Digital Health Solutions Ltd | Information & communication | 2021 |
| Laudec Ltd | Professional & scientific | 2023 |
| Lauder Engineering Ltd | Professional & scientific | 2021 |
| Launchpoint Digital Media Ltd | Professional & scientific | 2026 |
| Launton Consulting Services Ltd | Professional & scientific | 2024 |
| Laura Grainger Ltd | Information & communication | 2026 |
| Laura MAY Limited | Administrative & support | 2022 |