| Langville Properties Limited | Real estate | 1996 |
| Lank Holdings Limited | Real estate | 2021 |
| Lansafe Communications Ltd | Information & communication | 2014 |
| Lansafe Holdings Limited | Financial services | 2019 |
| Lansafe IT Limited | Information & communication | 2019 |
| Lansafe Limited | Information & communication | 2004 |
| Lansafe Security Limited | Administrative & support | 2019 |
| Lansafe Technology Group Limited | Information & communication | 2025 |
| Lanyte Group Ltd | Construction | 2025 |
| Lanza Optical Ltd | Professional & scientific | 2025 |
| LAP Property Solutions Limited | Real estate | 2014 |
| Lapitia Ltd | Professional & scientific | 2014 |
| Laptops at Cost UK Limited | Wholesale & retail | 2022 |
| Lara Best Shop Ltd | Wholesale & retail | 2025 |
| Lara Lamont Properties Limited | Real estate | 2026 |
| Lara Retail Food Ltd | Wholesale & retail | 2026 |
| Large Rail Ltd | Construction | 2014 |
| LAS Shervy Ltd | Transport & logistics | 2024 |
| Lash Room Interiors Limited | Other services | 2021 |
| Lashietic Limited | Health & social care | 2022 |
| Lasisi Cleaning Services Ltd | Other services | 2023 |
| Lateralus Inns Limited | Hospitality | 2019 |
| Latham Consult Ltd | Professional & scientific | 2022 |
| Latham Motors Limited | Wholesale & retail | 2025 |
| Latham Plumbing & Heating Services Limited | Construction | 2023 |
| Latina Latin Products Ltd | Wholesale & retail | 2024 |
| Launchrandom Limited | Construction | 1991 |
| Laura Lowe Financial Services Ltd | Financial services | 2024 |
| Laura's Hair Salon Limited | Other services | 2023 |
| LAURA1987 Limited | Health & social care | 2026 |
| Laurel 2011 Ltd | Real estate | 2011 |
| Lauren Beard Illustration Ltd | Information & communication | 2017 |
| Lauren Bottrill Limited | Administrative & support | 2012 |
| Lauren Cosmetic Aesthetics Ltd | Other services | 2022 |
| Lauris Medical Limited | Health & social care | 2025 |
| Lauriston (NW) Ltd | Construction | 2021 |
| Lavello Ltd | Professional & scientific | 2025 |
| Law Bookkeeping Limited | Professional & scientific | 2025 |
| Lawcroft Construction Ltd | Construction | 2024 |
| Lawns by Danny Ltd | Administrative & support | 2025 |
| Lawns Property Limited | Real estate | 1994 |
| Lawrenson Investments Ltd | Real estate | 2025 |
| Lawrenson Property Co Limited | Real estate | 2026 |
| Laybats Scenic Artist Ltd | Arts & recreation | 2014 |
| LC Beauty, Aesthetics, Recovery & Spa Ltd | Other services | 2024 |
| LC Digital Media Ltd | Information & communication | 2025 |
| LC Haulage Ltd | Transport & logistics | 2010 |
| LC Lift Holdings Ltd | Wholesale & retail | 2024 |
| LCC Construction Ltd | Construction | 2025 |
| LCF Logistics North West Limited | Transport & logistics | 2022 |
| LCH Projects Ltd | Professional & scientific | 2016 |
| LCN Styles Ltd | Wholesale & retail | 2021 |
| LCR Construction (NW) Ltd | Construction | 2025 |
| LCS VAC Limited | Construction | 2024 |
| LD Services North West Limited | Construction | 2020 |
| Ld&A Consultancy Limited | Health & social care | 2025 |
| LDJ Business Services Limited | Administrative & support | 2023 |
| LDL Lighting Holdings Limited | Wholesale & retail | 2023 |
| LDL Lighting Limited | Wholesale & retail | 1995 |
| Leadermac Holdings Limited | Extraterritorial | 2016 |
| Leadermac Hospitality Limited | Hospitality | 2022 |
| Leadermac UK Limited | Wholesale & retail | 2001 |
| Leading Dental Implants Limited | Health & social care | 2011 |
| Lear Jones Ltd | Transport & logistics | 2008 |
| Learn Cloud Limited | Extraterritorial | 2020 |
| Lease Bridge Ltd | Real estate | 2025 |
| LED Brite Limited | Extraterritorial | 2020 |
| Ledco 2 Limited | Real estate | 2008 |
| Ledson Motor Factors Limited | Professional & scientific | 2013 |
| LEE & Roberts Property Maintenance Ltd | Construction | 2019 |
| LEE Industrial Services Limited | Professional & scientific | 2022 |
| LEE P. Sullivan Limited | Transport & logistics | 2025 |
| Leech Digital Ltd | Information & communication | 2005 |
| Leeking Plumbing Limited | Construction | 2017 |
| Leesway Transport Solutions Ltd | Professional & scientific | 2026 |
| Legacy 7 Ltd | Real estate | 2020 |
| Legal Costs Indemnity Limited | Professional & scientific | 2002 |
| Legal Planning Group Ltd | Administrative & support | 2019 |
| Legal Secretaries Ltd | Extraterritorial | 2017 |
| Legavia Ltd | Professional & scientific | 2025 |
| Leigh & Westhoughton JU Jitsu Clubs Ltd | Arts & recreation | 2017 |
| Leigh Cares Services Ltd | Administrative & support | 2023 |
| Leigh Electrical Services Ltd | Construction | 2007 |
| Leigh Sports Village Limited | Arts & recreation | 2005 |
| Leisure Investment Properties Limited | Real estate | 2022 |
| Leisure Rentals Lancashire Ltd | Real estate | 2025 |
| Leisuretec (UK) Limited | Arts & recreation | 2000 |
| Lemon Accountancy Ltd | Professional & scientific | 2024 |
| LEN Tech Ltd | Construction | 2026 |
| LEO Financial Solutions Limited | Financial services | 2025 |
| Leolott Care Services Ltd | Health & social care | 2025 |
| Leoluna Property Limited | Real estate | 2025 |
| Leonard Property Development Ltd | Real estate | 2017 |
| Leonfray Limited | Information & communication | 2024 |
| Leonhard 1 Ltd | Professional & scientific | 2023 |
| Leonret | Professional & scientific | 2023 |
| Leren Professional Consultants Ltd | Professional & scientific | 2023 |
| Lescloches Ltd | Professional & scientific | 2024 |
| Lesll Ltd | Transport & logistics | 2024 |
| Lesscent Limited | Real estate | 1981 |