| LAPTOPS4CASH Limited | Wholesale & retail | 2009 |
| Larbett Properties Ltd | Real estate | 2026 |
| Larch Consultancy Limited | Professional & scientific | 2024 |
| Lashesbyjade Ltd | Other services | 2025 |
| Latif Food Ltd | Hospitality | 2024 |
| Latitude Travel Ltd | Administrative & support | 2015 |
| Laund View Transport Limited | Transport & logistics | 2015 |
| Laura Heywood Ltd | Professional & scientific | 2017 |
| Laura Riley Ltd | Hospitality | 2019 |
| Laurence Estates Limited | Construction | 2026 |
| Lauryn Consultancy Ltd | Professional & scientific | 2026 |
| LAW2YOU Ltd | Professional & scientific | 2018 |
| LB Pharma Limited | Health & social care | 2024 |
| LBS Sheetmetal Limited | Manufacturing | 2004 |
| LC Reman Ltd | Manufacturing | 2026 |
| LCE (Burnley) Holdings Limited | Financial services | 2024 |
| LCE (Burnley) Limited | Other services | 2000 |
| Ldah Property Ltd | Real estate | 2025 |
| LE Walton & Walton Ltd | Other services | 2024 |
| Leah Designs Limited | Wholesale & retail | 2023 |
| Leanne's Unisex Hair Salon Ltd | Other services | 2011 |
| Leapfrogs Playgym Limited | Arts & recreation | 2017 |
| Learning Cubs Burnley Ltd | Education | 2025 |
| Learning Leap Academy Ltd | Education | 2024 |
| LEB Associates Ltd | Other services | 2012 |
| Lectros International Limited | Professional & scientific | 1996 |
| LED Controls Limited | Wholesale & retail | 1996 |
| LEE Film Locations Ltd | Other services | 2015 |
| LEE Windle Limited | Information & communication | 2015 |
| Leeds Parcel Company Limited | Transport & logistics | 1999 |
| Leeds Super Store Limited | Wholesale & retail | 2025 |
| Lees Chippy Ltd | Hospitality | 2016 |
| Leeson Designs Limited | Manufacturing | 2002 |
| Legacy Education & Wellness Ltd | Education | 2025 |
| Legacy Impact C.I.C. | Education | 2025 |
| Legal PAL UK Ltd | Wholesale & retail | 2024 |
| Legal Services Solutions Ltd | Professional & scientific | 2019 |
| Legal Translation Solutions Ltd | Other services | 2016 |
| Leisure Yorkshire Limited | Real estate | 2025 |
| Lemon-Wood Packaging Ltd. | Professional & scientific | 2020 |
| Lena Services Ltd | Hospitality | 2016 |
| Lendfirst Ltd | Financial services | 2025 |
| Leon Stobbs Site Management Services Ltd | Construction | 2022 |
| Lespg Ltd | Wholesale & retail | 2017 |
| Level Digital Ltd | Professional & scientific | 2022 |
| Lewis Films Limited | Information & communication | 2025 |
| Leyra SHA Ltd | Wholesale & retail | 2026 |
| LG Hairdressing Limited | Other services | 2015 |
| Liam Transport NW Ltd | Transport & logistics | 2025 |
| Liberty Safeguarding Services Ltd | Health & social care | 2023 |
| Lichfield Investments Limited | Information & communication | 2021 |
| Life Church Lancashire | Health & social care | 2010 |
| Life Enhance Solutions Ltd | Health & social care | 2017 |
| Life LAB Ltd. | Manufacturing | 2007 |
| Lifesaver Engineering Ltd | Construction | 2022 |
| Light Express Ltd | Transport & logistics | 2025 |
| Lighten Care Services Ltd | Health & social care | 2022 |
| Lighthouse Travel Ltd | Transport & logistics | 2020 |
| Lighting & Illumination Technology Experience Limited | Manufacturing | 2001 |
| Lighting Options Ltd | Wholesale & retail | 2008 |
| Lignarius Ltd | Manufacturing | 2019 |
| Lils Fast Foods Ltd | Hospitality | 2024 |
| Lime Services Limited | Professional & scientific | 2024 |
| Limefield Group Limited | Financial services | 2019 |
| Linda's Loot Limited | Extraterritorial | 2022 |
| Lindhurst Fish Bar Ltd | Hospitality | 2024 |
| Lindley Property Investment Ltd | Real estate | 2025 |
| Lining Services Limited | Manufacturing | 2004 |
| Liquid Science Holdings Limited | Financial services | 2025 |
| Liquid Science Ltd | Extraterritorial | 1983 |
| Liquid Science Solutions Limited | Manufacturing | 1980 |
| Listenay Ltd | Wholesale & retail | 2025 |
| Lite Holdings Limited | Professional & scientific | 2006 |
| Lite Installations Ltd | Construction | 2013 |
| Litra Limited | Wholesale & retail | 2012 |
| Little Barista Franchising Ltd | Professional & scientific | 2026 |
| Little Blossoms of Barrowford Limited | Health & social care | 2014 |
| Little Miss Protein Ltd | Hospitality | 2024 |
| Little Piglet Ltd | Wholesale & retail | 2024 |
| Little Secrets Clothing Limited | Other services | 2017 |
| Live Sessions Limited | Professional & scientific | 2024 |
| Livefix Ltd | Other services | 2021 |
| Living Landscapes Limited | Agriculture & fishing | 1986 |
| Livsluxe Ltd | Wholesale & retail | 2022 |
| LJ Food Group Ltd | Wholesale & retail | 2025 |
| LJ Signature Joinery Ltd | Construction | 2026 |
| LJK Care Limited | Health & social care | 2023 |
| Ljsf Consulting Ltd | Information & communication | 2026 |
| Lj’S Beamer Specialist Ltd | Wholesale & retail | 2025 |
| Llil MAZ Ltd | Information & communication | 2023 |
| LLW Sales Ltd | Wholesale & retail | 2023 |
| LMC Architecture Ltd | Professional & scientific | 2007 |
| LMH Construction Ltd | Other services | 2021 |
| LMK Online Ltd | Wholesale & retail | 2024 |
| LMK Sales Ltd | Wholesale & retail | 2025 |
| LN Group Ltd | Administrative & support | 2017 |
| LN Mortgage Solutions Ltd | Financial services | 2024 |
| LN Partners Ltd | Information & communication | 2025 |
| LND GAS Plumbing and Heating Ltd | Construction | 2025 |
| Lnfishbar Ltd | Hospitality | 2026 |