| Leather LAB UK Ltd | Other services | 2021 |
| Leather Tech International Limited | Administrative & support | 2023 |
| Lecester Ltd | Construction | 2025 |
| Lecmats Ltd | Transport & logistics | 2024 |
| LED Invisible Sun Lights Ltd | Manufacturing | 2022 |
| LED Rehab Limited | Health & social care | 2016 |
| Ledhero Limited | Wholesale & retail | 2013 |
| LEE Cowell Transport Services Limited | Transport & logistics | 2019 |
| LEE Johnson Transport Ltd | Transport & logistics | 2025 |
| LEE Lane Pet Store Limited | Wholesale & retail | 2010 |
| LEE Norris Ltd | Construction | 2020 |
| LEE O'Neill Engineering Limited | Administrative & support | 2014 |
| LEE Russell Decorators Ltd | Construction | 2006 |
| Lee's Solutions Limited | Other services | 2009 |
| Lee's Transportation Solutions Limited | Transport & logistics | 2023 |
| Lee-Martin Thomas | Financial services | 2024 |
| Leeach Ltd | Wholesale & retail | 2017 |
| Leeds 17 Properties Limited | Real estate | 2022 |
| Leeming Image Limited | Arts & recreation | 2023 |
| Leesa Sleep Limited | Manufacturing | 2015 |
| Leeval Shop Direct Ltd | Wholesale & retail | 2018 |
| Legacy Holdings (Dalston) Limited | Construction | 2017 |
| Legacy Holdings (Whitechapel) Limited | Construction | 2016 |
| Legacy Practice Limited | Professional & scientific | 2021 |
| Legacy Vaper Limited | Wholesale & retail | 2024 |
| Legal 247 Consultancy Ltd | Professional & scientific | 2013 |
| Legal Advisor Ltd | Professional & scientific | 2026 |
| Legal Assist (Bolton) Limited | Professional & scientific | 2026 |
| Legal Assist Ltd | Professional & scientific | 2016 |
| Legal Consultants and Advocates Ltd | Professional & scientific | 2019 |
| Legal Developements (North West) Limited | Professional & scientific | 2020 |
| Legal Marketing & Consultancy Ltd | Professional & scientific | 2017 |
| Legal Practice Support Limited | Professional & scientific | 2015 |
| Legal Resolution Group C.I.C. | Administrative & support | 2024 |
| Legalease Consultancy Ltd | Professional & scientific | 2024 |
| Legend Leather Furniture Ltd | Manufacturing | 2024 |
| Legends in the Frame Limited | Wholesale & retail | 2017 |
| Legends Management NW Ltd | Wholesale & retail | 2024 |
| Legser Ltd | Professional & scientific | 2023 |
| Leigh C Evans Ltd | Professional & scientific | 2021 |
| Leigh EYE Clinic Limited | Wholesale & retail | 2026 |
| Leigh Plant Hire Holdings Ltd | Financial services | 2025 |
| LEIGH582 Limited | Real estate | 2025 |
| Leighton & Jeanine Ltd | Transport & logistics | 2025 |
| Leilah Mirza Coaching & Healing Ltd | Other services | 2025 |
| Leilong Ltd | Wholesale & retail | 2019 |
| Leisure Products (Bolton) Limited | Manufacturing | 1981 |
| Leisure Solutions (NW) Ltd | Other services | 2017 |
| Leisure Vehicle Detailing Ltd | Wholesale & retail | 2022 |
| Leisuredrive (Vehicle Sales) Limited | Manufacturing | 1992 |
| Leisuredrive Campervans Ltd | Manufacturing | 1997 |
| Leisureguard (UK) Limited | Administrative & support | 2004 |
| Leisurely Cheers Limited | Hospitality | 2026 |
| Leisurewear Design Limited | Manufacturing | 2006 |
| Lelantos BIO Limited | Professional & scientific | 2025 |
| Lelantos Consulting Limited | Professional & scientific | 2014 |
| Lemmy Surf Limited | Professional & scientific | 2024 |
| Lemon Financial Technologies Ltd | Information & communication | 2021 |
| Lemsford Lessees RTM Company Ltd | Households | 2016 |
| Lena Pastry Ltd | Wholesale & retail | 2026 |
| Lencia Services Limited | Professional & scientific | 2012 |
| Lendle Finance Group Ltd | Financial services | 2016 |
| Lendle Home Loans Ltd | Financial services | 2017 |
| Lendle Mortgages Ltd | Financial services | 2017 |
| Lenek Limited | Transport & logistics | 2014 |
| Lennon AC Ltd | Construction | 2022 |
| Lennon H Ltd | Transport & logistics | 2026 |
| LEO Aureum Limited | Information & communication | 2022 |
| LEO Carpentry Ltd | Construction | 2024 |
| LEO Persian Ltd | Arts & recreation | 2025 |
| LEO-11 Limited | Other services | 2023 |
| Leodis Software Limited | Information & communication | 2023 |
| Leon Palace UK Ltd | Other services | 2025 |
| Leone Group Ltd | Administrative & support | 2026 |
| Leonis Solutions Ltd | Professional & scientific | 2016 |
| Leos AL Limited | Hospitality | 2022 |
| Leposh Ltd | Wholesale & retail | 2022 |
| LES Williams & Co. (Electrical Insulation) Limited | Manufacturing | 1978 |
| Lesall Ltd | Hospitality | 2025 |
| Lesi Hand Car Wash Limited | Administrative & support | 2016 |
| Lesi Hand Carwash Bolton Limited | Administrative & support | 2026 |
| Lesley ANN Consultancy Limited | Administrative & support | 2004 |
| Let's Brand Ltd | Professional & scientific | 2026 |
| Let's Talk Dessert Ltd | Wholesale & retail | 2023 |
| Let's Work Together - Building Communities Limited | Hospitality | 2023 |
| Letalske Ltd | Wholesale & retail | 2023 |
| Letisha Healthcare Limited | Health & social care | 2014 |
| Lets Study Ltd | Education | 2019 |
| Lets Take a Trip Global Consult Ltd | Administrative & support | 2023 |
| Letting Management Ltd | Real estate | 2025 |
| Letworth Properties Ltd | Real estate | 2025 |
| LETZCRE8 Limited | Information & communication | 2023 |
| LEV & Air Movement Designs Limited | Manufacturing | 2016 |
| Levant Aesthetics Limited | Health & social care | 2026 |
| Levant Estates Limited | Real estate | 2026 |
| Leve Clean Ltd | Administrative & support | 2025 |
| Level 5 Consultants Ltd | Professional & scientific | 2013 |
| Level Accounting Ltd | Professional & scientific | 2016 |
| Level UP Centre CIC | Education | 2023 |
| Level UP Kidz CIC | Education | 2025 |