| Laurazuri Limited | Professional & scientific | 2021 |
| Laurel & Hardy Limited | Wholesale & retail | 2025 |
| Laurel Place Health Care Limited | Health & social care | 2023 |
| Laurelli Group Ltd | Wholesale & retail | 2021 |
| Lauren Brown Consulting Ltd | Professional & scientific | 2025 |
| Lauren Grimson Design Limited | Professional & scientific | 2026 |
| Lauren Thorpe Designs Limited | Construction | 2023 |
| Laurie's Lets Ltd | Real estate | 2025 |
| Lava and Leaf Publishing Limited | Wholesale & retail | 2025 |
| Lavandula Holdings Ltd | Financial services | 2024 |
| Lavender Cottage Penistone Limited | Hospitality | 2026 |
| Lavender International Trustee Company Limited | Professional & scientific | 2015 |
| Lavender Road Ltd | Information & communication | 2019 |
| Lavenders of Sheffield Limited | Extraterritorial | 2022 |
| Laver Investment Properties Limited | Real estate | 2015 |
| Laver Leisure (Oakamoor) Limited | Hospitality | 2009 |
| Laver Leisure Limited | Hospitality | 2015 |
| Laver Regeneration Group Limited | Professional & scientific | 2007 |
| Laver Regeneration Holdings Limited | Professional & scientific | 2007 |
| Laver Regeneration Limited | Construction | 1932 |
| Laver Regeneration Topco Limited | Professional & scientific | 2023 |
| Lavin Hall Limited | Real estate | 2025 |
| Lavin Immigration Services Ltd | Professional & scientific | 2025 |
| Lavish Layover Ltd | Transport & logistics | 2025 |
| Law Brothers (Tours) Limited | Wholesale & retail | 1961 |
| Law Brothers Limited | Real estate | 2006 |
| Law DB Ltd | Real estate | 2025 |
| Law-Mech Ltd | Professional & scientific | 2017 |
| Lawa Barbers Ltd | Other services | 2024 |
| Lawfm Acquisitions Ltd | Financial services | 2015 |
| Lawless L&D Ltd | Hospitality | 2024 |
| Lawnsmith's Landscapes Ltd | Administrative & support | 2016 |
| Lawrence Beety Interiors Ltd | Construction | 2023 |
| Laws Geophysics Limited | Mining & quarrying | 2011 |
| Lawson Brothers Construction Ltd | Construction | 2022 |
| Lawson Data Services Ltd | Information & communication | 2023 |
| Lawson Material & Logistic Management Ltd | Construction | 2025 |
| Lawson Wills & Probate Limited | Professional & scientific | 2020 |
| Lawsys Consulting Limited | Information & communication | 2024 |
| Lawton Consultants Ltd | Arts & recreation | 2026 |
| Laxey Road Flats Management Limited | Households | 1981 |
| Laxmi Dabbi Ltd | Other services | 2024 |
| Laxmi Healthcare Ltd | Health & social care | 2018 |
| Laycock Precision Limited | Manufacturing | 1984 |
| LAYER3 Data Services Limited | Information & communication | 2004 |
| Layers Flooring Limited | Wholesale & retail | 2009 |
| Layers Property Limited | Real estate | 2024 |
| Layla Nails Ltd | Other services | 2025 |
| Layne Electrical and Mechanical Services Ltd | Manufacturing | 2004 |
| Lays Rail Ltd | Construction | 2018 |
| LAZ28 Ltd | Hospitality | 2024 |
| Lazy Leisure Campers Limited | Professional & scientific | 2015 |
| La’S Sarnie Stop Ltd | Hospitality | 2024 |
| LB and JB Properties Limited | Real estate | 2018 |
| LB Children and Family Consultancy Limited | Professional & scientific | 2021 |
| LB Construction & Design Ltd | Construction | 2010 |
| LB Development Properties Limited | Construction | 2017 |
| LB Music Group Ltd | Arts & recreation | 2026 |
| Lbbdetailing Ltd | Administrative & support | 2020 |
| LBG Homes Ltd | Construction | 2019 |
| LBM Property Solutions Limited | Real estate | 2021 |
| LBP Commercial Limited | Real estate | 2025 |
| LBP Professional Services Limited | Health & social care | 2025 |
| Lbsf Holdings Ltd | Professional & scientific | 2018 |
| LC Consultancy Services Ltd | Professional & scientific | 2015 |
| LC Electrical (UK) Ltd | Construction | 2009 |
| LC Electrical 96 Limited | Energy | 2017 |
| LC Electrical Property & Maintenance Ltd | Construction | 2025 |
| LC Fitness and Coaching Ltd | Education | 2022 |
| LC Gems & Collectables Ltd | Wholesale & retail | 2024 |
| LC Mantilly Property Ltd | Real estate | 2024 |
| LC Operations Consultants Limited | Hospitality | 2025 |
| LC Water Products Limited | Wholesale & retail | 2015 |
| LCB Occupational Health Consultancy Ltd | Health & social care | 2011 |
| LCG Propco Limited | Real estate | 2017 |
| LCI Joinery Limited | Manufacturing | 2025 |
| Lciaoc Ltd | Arts & recreation | 2008 |
| LCW1 Limited | Real estate | 2016 |
| LD Electrical Ltd | Construction | 2016 |
| LD Flooring Solutions Limited | Construction | 2022 |
| LD Innovation & IP Ltd | Financial services | 2025 |
| LD Solar Ltd | Construction | 2024 |
| LD Wheels Limited | Wholesale & retail | 2026 |
| LDA (Transmission Engineering) Limited | Manufacturing | 1975 |
| LDD Property Ltd | Real estate | 2021 |
| LDP Surfacing Ltd | Construction | 2021 |
| LDR Logistics Ltd | Transport & logistics | 2026 |
| LDS Construction Yorkshire Limited | Construction | 2024 |
| LDS Estates Limited | Construction | 2005 |
| LDS Group Limited | Financial services | 2020 |
| LDS Properties Yorkshire Limited | Households | 2023 |
| LDS Property Development Limited | Construction | 2019 |
| LDS Waste Management Ltd | Administrative & support | 2020 |
| LE HAO Limited | Hospitality | 2024 |
| LE Haricot Middlewood Limited | Hospitality | 2025 |
| LE Mondo Ltd | Real estate | 2024 |
| LE Morne Real Estate Ltd | Real estate | 2023 |
| LE Petite Boutique Ltd | Wholesale & retail | 2020 |
| LE PLA & Co.Limited | Manufacturing | 1960 |
| LE Property Developments Ltd | Real estate | 2025 |