| L'Amour Pure Ltd. | Manufacturing | 2015 |
| L. M. Pemberton Holdings Limited | Financial services | 2025 |
| L.M.S Engineering Ltd | Manufacturing | 2021 |
| L.S Cladding Ltd | Construction | 2021 |
| L.S.L Electrical Limited | Construction | 2017 |
| L22 Media Ltd | Information & communication | 2024 |
| L2P Ltd | Education | 2025 |
| L3DTRANSGO Ltd | Administrative & support | 2019 |
| LA Avram Grill Shawarm Ltd | Agriculture & fishing | 2026 |
| LA Avram Grill Shawarma Ltd | Hospitality | 2026 |
| LA Boliviana Films Ltd | Information & communication | 2023 |
| LA Caserta Ltd | Real estate | 2019 |
| LA Friends Pizza Ltd | Hospitality | 2017 |
| LA Iosif Deserts Ltd | Hospitality | 2024 |
| LA Malva Rosa Limited | Real estate | 2018 |
| LA Matache Macelaru Ltd | Wholesale & retail | 2023 |
| LA Pomme Ltd | Wholesale & retail | 2019 |
| LA Roma Gifts Ltd | Wholesale & retail | 2025 |
| LAB Construction Group Ltd | Construction | 2026 |
| Lababoo Limited | Professional & scientific | 2019 |
| Labaks Services Limited | Health & social care | 2015 |
| Labbrax Ltd | Professional & scientific | 2022 |
| Labeloryx File Order Limited | Information & communication | 2026 |
| Labquip Limited | Wholesale & retail | 1997 |
| Labrador Cottages Limited | Construction | 2022 |
| Labrador Retreats Ltd | Hospitality | 2025 |
| LAC Masonry Ltd | Construction | 2024 |
| Lace & Legacy Ltd | Wholesale & retail | 2025 |
| Lacuna Limited | Professional & scientific | 1996 |
| Lacuna UK and Ireland Ltd | Wholesale & retail | 2015 |
| Ladiva Beauty Lounge Ltd | Other services | 2026 |
| Ladservices Ltd | Construction | 2018 |
| Lady Bakewell-Park Ltd | Manufacturing | 2021 |
| Lady KAS Limited | Health & social care | 2016 |
| LAE Projects Ltd | Information & communication | 2014 |
| Lair the Movie Ltd | Information & communication | 2019 |
| Lakeside Accountancy Ltd | Professional & scientific | 2025 |
| Lakewood Consultancy Ltd | Professional & scientific | 2024 |
| Lakha Haulage Ltd | Transport & logistics | 2023 |
| Lalex Ltd | Health & social care | 2024 |
| Lambert Properties Limited | Real estate | 2003 |
| Lamom Limited | Manufacturing | 2024 |
| Lamp Light Productions Limited | Arts & recreation | 2025 |
| Lamson Limited | Wholesale & retail | 2003 |
| Lamue Limited | Extraterritorial | 2015 |
| Lana's Holistic Centre Ltd | Health & social care | 2022 |
| Lanacross Properties Limited | Real estate | 2005 |
| Land & Marine Publications Limited | Information & communication | 1992 |
| Landastech Limited | Wholesale & retail | 2026 |
| Landex Commercial Property Limited | Real estate | 2016 |
| Landex Holdings Limited | Financial services | 2016 |
| Landex Limited | Construction | 2006 |
| Landex Property Limited | Real estate | 2005 |
| Landmark Construction Services Limited | Construction | 2001 |
| Landmark Group (E.A) Ltd | Financial services | 2017 |
| Landmark Hire Services Limited | Administrative & support | 2019 |
| Landmark Plant Services Limited | Administrative & support | 2019 |
| Landmark Properties & Letting Ltd | Real estate | 2024 |
| Landmark Property Services Ltd | Real estate | 2019 |
| Landmark Training and Consultancy Services Limited | Education | 2019 |
| Landscapability Ltd | Administrative & support | 2020 |
| Landseer Services Ltd | Information & communication | 2019 |
| Langa Freight Management Ltd | Transport & logistics | 2026 |
| Langden Games Ltd | Wholesale & retail | 2017 |
| Langer Park Service Station Ltd | Manufacturing | 2012 |
| Langham Barns Management Company Limited | Extraterritorial | 2007 |
| Langham Oaks Developments Limited | Construction | 2025 |
| Langison Ltd | Real estate | 2025 |
| Langshaw Close Management Company Ltd | Real estate | 2024 |
| Langston Properties Ltd | Real estate | 2026 |
| Langton Place Residential Limited | Construction | 2007 |
| Langton Vale Management Company Limited | Households | 2020 |
| Lanlink Management Ltd | Real estate | 2015 |
| Lansdown House Property Limited | Financial services | 2022 |
| Lanya Kebab Ltd | Hospitality | 2026 |
| Lanyard Place Management Limited | Households | 2007 |
| Lanzar Ltd | Wholesale & retail | 2024 |
| Lanzar TT Ltd | Professional & scientific | 2024 |
| LAP Ipswich Limited | Transport & logistics | 2016 |
| Lapool Limited | Information & communication | 2015 |
| Laprey Investments Limited | Extraterritorial | 2013 |
| Lapwing Suffolk Limited | Education | 2010 |
| LAR Running Limited | Arts & recreation | 2024 |
| Larch Croft Properties Ltd | Real estate | 2025 |
| Larch Property Management LLP | | 2021 |
| Larimar Properties Limited | Real estate | 2017 |
| Lark Grove (Somersham) Management Company Limited | Households | 2021 |
| Lark Property Group Client Account Ltd | Financial services | 2025 |
| Lark Property Group Limited | Real estate | 2024 |
| Larkspur Homes Ltd | Real estate | 2019 |
| Lasan Indian Take Away Limited | Administrative & support | 2018 |
| Lashone Group Ltd | Information & communication | 2023 |
| Lashone Healthcare Home Limited | Health & social care | 2026 |
| Last Financial Limited | Financial services | 2025 |
| Lastbit Limited | Information & communication | 2025 |
| Lasting Dreams Limited | Real estate | 1999 |
| Latchmere Investments Ltd | Real estate | 2026 |
| Latdean Limited | Information & communication | 1998 |
| Latest Records Ltd | Information & communication | 2000 |
| Latham's Candy Co Ltd | Wholesale & retail | 2025 |