| Lezen Pilates Studio Limited | Other services | 2019 |
| LF (Holdco) Limited | Professional & scientific | 2019 |
| LF Pearson Ltd | Arts & recreation | 2020 |
| LFA Installations Services Ltd | Other services | 2024 |
| LFA Property Ltd | Real estate | 2026 |
| LFH Socials Ltd | Information & communication | 2024 |
| Lftm Property Limited | Construction | 2019 |
| LFX Films Ltd | Information & communication | 2022 |
| LG Divine Care Limited | Health & social care | 2017 |
| LG DJ Ltd | Arts & recreation | 2026 |
| LGC Pharma Consultancy Services Ltd | Professional & scientific | 2019 |
| LGC Worx Services and Property Limited | Real estate | 2020 |
| LGG Global Limited | Real estate | 1994 |
| LGM Automotive Ltd | Wholesale & retail | 2022 |
| LGS Consultancy Services Limited | Administrative & support | 2020 |
| LGS Finance Consulting Limited | Professional & scientific | 2018 |
| LGXKS4 Limited | Financial services | 2024 |
| LH Consultants Ltd | Health & social care | 2025 |
| LH Environmental Limited | Professional & scientific | 2022 |
| LH Joinery Solutions Limited | Construction | 2023 |
| Lhcrepz Ltd | Wholesale & retail | 2025 |
| LHP Developments Ltd | Construction | 2019 |
| LHP Holdings Ltd | Real estate | 2019 |
| Lhrh Ltd | Health & social care | 2025 |
| LI Osteopathy Limited | Health & social care | 2023 |
| LI Retail Ltd | Wholesale & retail | 2025 |
| LI8 Property Ltd | Real estate | 2025 |
| LIA Property Investments Limited | Real estate | 2024 |
| LIA Support Ltd | Administrative & support | 2021 |
| Liam Capital Limited | Hospitality | 2018 |
| Liam Riley Motor Services Ltd | Wholesale & retail | 2024 |
| Lian and Grace Investments Unlimited | Financial services | 2022 |
| Liba Consulting and Advisory Services Limited | Professional & scientific | 2011 |
| Libby Upton Wellness Ltd | Health & social care | 2026 |
| Libby's Little Loops Limited | Arts & recreation | 2025 |
| Liberal Clothing Limited | Wholesale & retail | 2017 |
| Libertas Management (2011) Ltd | Professional & scientific | 2011 |
| Liberty Gym Limited | Arts & recreation | 2008 |
| Liberty Hvac Ltd | Construction | 2014 |
| Liberty Leisure Limited | Arts & recreation | 2016 |
| Liberty Trail Care Group Ltd | Financial services | 2024 |
| Liberty Trail Homes CIC | Hospitality | 2022 |
| Libra Apartments Limited | Real estate | 2018 |
| Licence Law Consultancy Limited | Professional & scientific | 2017 |
| Licensed to Clear Limited | Water & waste | 2025 |
| Lichen Electrical & Plumbing Limited | Construction | 2018 |
| Lichfield V.E. Limited | Other services | 1996 |
| Lick & Bite Ltd | Hospitality | 2025 |
| Lidder Care Group Limited | Health & social care | 2018 |
| Lieu Donne Ventures Limited | Real estate | 2024 |
| Life & Light Chiropractic Ltd | Health & social care | 2020 |
| Life (Learning in a FUN Environment) Community Interest Company | Education | 2007 |
| Life 5ENSES Ltd | Wholesale & retail | 2024 |
| Life Barriers Ltd | Information & communication | 2013 |
| Life Bridge Homes Ltd | Other services | 2018 |
| Life Education East Midlands Limited | Education | 1996 |
| Life Evergreen UK Limited | Information & communication | 2023 |
| Life Icon Limited | Wholesale & retail | 2015 |
| Life Interiors (FR) Limited | Wholesale & retail | 2020 |
| Life Interiors International Ltd | Wholesale & retail | 2018 |
| Life Interiors Management Ltd | Other services | 2020 |
| Life IS UN Ltd | Wholesale & retail | 2021 |
| Life Matters Coaching Limited | Professional & scientific | 2011 |
| Life Pulse Solutions Limited | Wholesale & retail | 2024 |
| Life Skills Education Charity | Education | 2011 |
| Lifeboy Ltd | Information & communication | 2012 |
| Lifemate Global Services Ltd | Information & communication | 2022 |
| Lifespan Ltd | Professional & scientific | 2022 |
| Lifestyle Investor Ltd | Professional & scientific | 2021 |
| Lifestyle Living Investments Limited | Hospitality | 2013 |
| Lifestyle Newsagent Ltd | Wholesale & retail | 2024 |
| Lifestyle Success Ltd | Administrative & support | 2024 |
| Lifetap Ltd | Information & communication | 2025 |
| Lift Consultancy Holdings Limited | Financial services | 2025 |
| Lift Investments Limited | Financial services | 2004 |
| Liftec Limited | Professional & scientific | 1996 |
| Lifted Drinks Ltd | Manufacturing | 2022 |
| Lifted Moments Ltd | Wholesale & retail | 2025 |
| Liftlink (Mids) Limited | Manufacturing | 2003 |
| Liftup Support Ltd | Health & social care | 2025 |
| Light & Lens Limited | Professional & scientific | 2025 |
| Light and Mirror Consulting Ltd | Professional & scientific | 2024 |
| Light House Healthcare Services Ltd | Health & social care | 2018 |
| Light Matrix Ltd | Information & communication | 2025 |
| Light Never Ltd | Wholesale & retail | 2025 |
| Light Tree Ventures Ltd | Other services | 2024 |
| Lightbeam UK Limited | Information & communication | 2004 |
| Lightbulb Credit Ltd | Information & communication | 2017 |
| Lighthome Trading Ltd | Wholesale & retail | 2026 |
| Lighthome UK Limited | Wholesale & retail | 2009 |
| Lighthouse Accommodation Ltd | Hospitality | 2024 |
| Lighthouse Art Ltd | Arts & recreation | 2025 |
| Lighthouse Display International Limited | Manufacturing | 1992 |
| Lighthouse Display International POS Ltd | Manufacturing | 2019 |
| Lighthouse Property & Investments Limited | Real estate | 2022 |
| Lighting Fabrications Limited | Construction | 2013 |
| Lighting for Staffordshire Holdings Limited | Professional & scientific | 2002 |
| Lighting for Staffordshire Limited | Construction | 2003 |
| Lightj Studios Ltd | Information & communication | 2024 |
| Lightning Consultants (UK) Limited | Construction | 1991 |