| Lazordi Limited | Manufacturing | 2025 |
| LB (Burnley) Limited | Hospitality | 2025 |
| LBI Electrical Contractors Ltd | Construction | 2023 |
| LC Transport Group Ltd | Transport & logistics | 2026 |
| LCD Plastering Limited | Construction | 2015 |
| LCD Property Developments Limited | Real estate | 2020 |
| LCF Logistics Ltd | Transport & logistics | 2015 |
| LCI Services Ltd | Mining & quarrying | 2019 |
| LCI Supplies UK Ltd | Wholesale & retail | 2020 |
| LDB (NW) Holdings Limited | Financial services | 2019 |
| LDE Access Services Ltd | Construction | 2024 |
| LDF Access Services Ltd | Construction | 2025 |
| LE Garage Francais Limited | Wholesale & retail | 2025 |
| Lead Solutions Limited | Construction | 2005 |
| Leading Renovations Ltd | Construction | 2024 |
| Leadville Ltd | Information & communication | 2012 |
| Lean & Hard (UK) Ltd | Administrative & support | 2015 |
| Lean Kitchen (Preston) Limited | Hospitality | 2019 |
| Learndrive Ltd | Education | 2008 |
| Learning D - Limited | Professional & scientific | 2012 |
| Learnopoly Ltd | Information & communication | 2021 |
| Leaves and Lattes Limited | Wholesale & retail | 2026 |
| Leburr Limited | Construction | 2007 |
| Leckpatrick Oils Ltd | Wholesale & retail | 2025 |
| LEE Fenton Planning Services Limited | Professional & scientific | 2019 |
| LEE M Brown Fabrications Limited | Construction | 2018 |
| LEE O'Hara Joinery Ltd | Construction | 2026 |
| LEE Sanderson Electrical Contractors Limited | Construction | 2005 |
| Leedale Homes Ltd | Real estate | 2025 |
| Leelask Ltd | Wholesale & retail | 2026 |
| Leep Access Ltd | Construction | 2017 |
| Leera Limited | Professional & scientific | 2010 |
| Leewood Oval Ltd | Wholesale & retail | 2025 |
| Lefroy Mitre Ltd | Wholesale & retail | 2025 |
| Leftcoast Blackpool | Arts & recreation | 2018 |
| Legacy Tattoo Products Limited | Wholesale & retail | 2025 |
| Legal & Financial Investigation Services Limited | Professional & scientific | 2015 |
| Legal Allianz Ltd | Professional & scientific | 2020 |
| Legend for Hair Ltd | Other services | 2018 |
| Legendary Loot Locker Ltd | Wholesale & retail | 2025 |
| Leisure Dynamics Ltd | Hospitality | 2025 |
| Leisure Hotels Limited | Hospitality | 2016 |
| Leisure Management North West Limited | Real estate | 2013 |
| Leith Facilities Ltd | Professional & scientific | 2013 |
| Lemmys Bar Ltd | Hospitality | 2024 |
| Lemniscate Technology Ltd | Information & communication | 2017 |
| Lengs Funeral Services NW Ltd | Other services | 2024 |
| Lennox Build & Design Limited | Administrative & support | 2017 |
| Leofric Legends Limited | Wholesale & retail | 2019 |
| Leom Investments Limited | Financial services | 2024 |
| Leon Leisure Services Ltd | Real estate | 2026 |
| Leonard Property Services Limited | Real estate | 2003 |
| Leonard Property Solutions Limited | Real estate | 2018 |
| Leonards Gate Property Limited | Construction | 2025 |
| Leroy Mark Hairdressing Ltd | Other services | 2003 |
| LES Petits Essentiels Limited | Wholesale & retail | 2020 |
| Leslie Gilbert Limited | Construction | 2003 |
| Less Costs Supermarket Ltd | Wholesale & retail | 2017 |
| Lester's Storage (N.W.) Limited | Administrative & support | 2013 |
| LET My Homes Ltd | Real estate | 2017 |
| LET SAS GB Ltd | Real estate | 2025 |
| Leta Ltd | Information & communication | 2018 |
| Level (Preston) Limited | Arts & recreation | 2016 |
| Level 8 Experience Limited | Extraterritorial | 2019 |
| Leviathan Labs Ltd | Manufacturing | 2024 |
| LEX Trans Ltd | Transport & logistics | 2016 |
| Lexcor Ltd | Hospitality | 2019 |
| Lexington Law Limited | Professional & scientific | 2017 |
| Lexsar Solutions Limited | Professional & scientific | 2018 |
| LG Energy Group Limited | Professional & scientific | 2011 |
| LG Window Cleaning Ltd | Administrative & support | 2022 |
| Lgwl Limited | Administrative & support | 2018 |
| LH Builders Limited | Construction | 2024 |
| LH Fabrications Limited | Construction | 2016 |
| LHA Hotels Ltd | Hospitality | 2025 |
| LHC Ventilations Limited | Construction | 2023 |
| LHE Avram Limited | Transport & logistics | 2022 |
| Lhla Property Holdings Ltd | Real estate | 2024 |
| LI & Scully Investments Ltd | Hospitality | 2025 |
| Liam Roberts Ltd | Transport & logistics | 2026 |
| Liar's Bar Limited | Hospitality | 2025 |
| Libre Consultancy Ltd | Information & communication | 2015 |
| Licence Training Solutions Ltd | Professional & scientific | 2018 |
| Licorne Consulting Limited | Information & communication | 2016 |
| Lidvertise Media Ltd | Professional & scientific | 2017 |
| Life Association Limited | Education | 2006 |
| Life Change Holdings Limited | Health & social care | 2023 |
| Lifeafter Limited | Real estate | 2019 |
| Lifestyle TV Limited | Arts & recreation | 2006 |
| Lifestyletastic Limited | Wholesale & retail | 2021 |
| Lifton Hall Hotel Ltd | Hospitality | 2011 |
| Liger Business Ltd | Wholesale & retail | 2025 |
| Liger Hub Ltd | Wholesale & retail | 2025 |
| Lightburne Consulting Ltd | Professional & scientific | 2024 |
| Lighten Your Load Limited | Administrative & support | 2016 |
| Lighthouse Acoustics Limited | Extraterritorial | 2014 |
| Lighthouse Marine Consultancy Limited | Professional & scientific | 2019 |
| Lilajagan Ltd | Real estate | 2025 |
| Lilliput Kennels Limited | Other services | 2025 |
| Lilo Charcoal Ltd | Hospitality | 2018 |