| Landscape Management Group Ltd | Administrative & support | 2024 |
| Landscape Spaces Ltd | Administrative & support | 2025 |
| Lane Comms Limited | Information & communication | 2015 |
| Lane of Consistency Ltd | Manufacturing | 2023 |
| Language IS Everything Limited | Professional & scientific | 1997 |
| Lanham Associates Limited | Professional & scientific | 1999 |
| Lanka Hull Limited | Hospitality | 2021 |
| Lano's Hull Limited | Hospitality | 2014 |
| Lansco Developments Limited | Construction | 2008 |
| Laoluwa Limited | Information & communication | 2025 |
| LAP Property Investments Ltd | Real estate | 2025 |
| Lape Food Ltd | Wholesale & retail | 2023 |
| Lapop Ventures Limited | Manufacturing | 2025 |
| Lara Catering Ltd | Hospitality | 2024 |
| Larissa Limited | Wholesale & retail | 2025 |
| Lark Systems Limited | Information & communication | 2017 |
| Larkin PR Ltd | Professional & scientific | 2020 |
| Larsens Accountants Limited | Professional & scientific | 2008 |
| Laser Consumables Ltd | Wholesale & retail | 2018 |
| Laser RAY Arts Ltd | Manufacturing | 2025 |
| Latino Bistro Limited | Hospitality | 2025 |
| Latis & Stuart Limited | Professional & scientific | 2009 |
| Lattos Bites Ltd | Hospitality | 2024 |
| Latulip Creations Ltd | Hospitality | 2026 |
| Latus Construction Ltd | Construction | 2018 |
| Latus Group (IDC) Ltd | Administrative & support | 2003 |
| Latus Group (UK) Ltd | Health & social care | 2016 |
| Latus Group Bidco Limited | Financial services | 2023 |
| Latus Group Debtco Limited | Financial services | 2023 |
| Latus Health Ltd | Health & social care | 2017 |
| Launched Technologies Limited | Professional & scientific | 2020 |
| Laundry DE Luxe Ltd | Administrative & support | 2025 |
| Launica Pizza Kebab Ltd | Hospitality | 2024 |
| Laura ANN Consulting Ltd | Professional & scientific | 2026 |
| Laura Mazecaite Limited | Health & social care | 2010 |
| Laurelwood Limited | Financial services | 2020 |
| Laurette Glenwright Interim Services Limited | Professional & scientific | 2004 |
| Lavana Food Food Limited | Hospitality | 2025 |
| Lavana Food Kitchen Hull Limited | Hospitality | 2025 |
| Lavana Kitchens Ltd | Hospitality | 2025 |
| LAVIN777 Ltd | Real estate | 2024 |
| Lavoga Ltd | Information & communication | 2024 |
| Lavy's Viennoiserie Family Ltd | Hospitality | 2025 |
| Lavytrans Solutions Ltd | Transport & logistics | 2025 |
| Law Mechanical Ltd | Construction | 2025 |
| Lawless London Ltd | Manufacturing | 2024 |
| Lawncare & Maintenance Limited | Administrative & support | 2024 |
| Lawns Court (Sutton) Ltd | Real estate | 2023 |
| Lawson Court Freehold Limited | Households | 2024 |
| Lawson Electrical Ltd | Construction | 2024 |
| Laybourne Consulting Ltd | Administrative & support | 2025 |
| LAYER8 IT Limited | Information & communication | 2012 |
| Lazenbys Limited | Manufacturing | 1995 |
| LB Ec&I Solutions Ltd | Professional & scientific | 2025 |
| LB Radiation Protection Rope Access Ltd | Professional & scientific | 2018 |
| LB Tech Group Ltd | Information & communication | 2024 |
| LB Transportation Ltd | Transport & logistics | 2021 |
| LBC Beauty Lounge & Training Academy Limited | Other services | 2025 |
| LBD Property Limited | Real estate | 2023 |
| LBN Construction Limited | Construction | 2018 |
| LC Governance Solutions Limited | Professional & scientific | 2024 |
| LC Sanderson Holdings Ltd | Financial services | 2026 |
| LC4E Management Ltd | Construction | 2021 |
| LCB Properties Ltd | Real estate | 2017 |
| LCF Magic MEN Ltd | Manufacturing | 2021 |
| Lcfa Challenge Series Ltd | Arts & recreation | 2025 |
| LCL1904 Ltd | Hospitality | 2023 |
| LD Nails Bar Limited | Other services | 2024 |
| LD Property (Hull) Ltd | Real estate | 2021 |
| LDA Leisure (Holdings) Limited | Arts & recreation | 2016 |
| LDK Sign Services Ltd | Manufacturing | 2025 |
| LDK Transport Limited | Other services | 2015 |
| Ldkh Law Ltd | Professional & scientific | 2023 |
| LDN Joinery Limited | Construction | 2010 |
| LDN Leisure Homes Limited | Construction | 2025 |
| LDN Powerwash Ltd | Administrative & support | 2025 |
| LE Mont Property Limited | Real estate | 2020 |
| LEA Croft Developments Limited | Construction | 2002 |
| LEA Investments | Professional & scientific | 2013 |
| Leafe & Hawkes Hull Limited | Transport & logistics | 2009 |
| Leafe & Hawkes Limited | Transport & logistics | 1971 |
| Leafe Consultancy Limited | Professional & scientific | 2017 |
| Leaflet Delivery UK Hull Ltd | Information & communication | 2025 |
| League Bidco Limited | Financial services | 2024 |
| League Midco Limited | Financial services | 2024 |
| League Topco Limited | Financial services | 2024 |
| Lean-Aps Solutions Ltd | Wholesale & retail | 2019 |
| Leanapex Consultancy Ltd | Professional & scientific | 2025 |
| Leap Ahead Childcare (Nlincs) Ltd | Education | 2020 |
| Leap Ahead Nurseries Limited | Education | 2014 |
| Leap Ahead Ulceby Ltd | Education | 2025 |
| Leapworlduk Limited | Real estate | 2024 |
| Lebasi Ltd | Real estate | 2026 |
| LEC Refinishers Ltd | Wholesale & retail | 2023 |
| LED Panel Store Limited | Wholesale & retail | 2015 |
| Ledsave Limited | Construction | 2011 |
| LEE Advocacy Ltd | Professional & scientific | 2024 |
| LEE Booth Properties Limited | Construction | 2014 |
| LEE Hood Plumbing & Heating Limited | Construction | 2002 |
| LEE Sims Consultancy Limited | Professional & scientific | 2026 |