| L. H. Evans Holdings Limited | Professional & scientific | 2007 |
| L.A Building Maintenance Limited | Construction | 2023 |
| L.A.B. Global Contracting Ltd | Professional & scientific | 2013 |
| L.A.Gant Limited | Information & communication | 2013 |
| L.B Consttructions Ltd | Construction | 2023 |
| L.B. London Business Ltd | Professional & scientific | 2011 |
| L.D Magic Planet Ltd. | Real estate | 2016 |
| L.H Electrical and Fire Ltd | Construction | 2024 |
| L.H. Evans Limited | Wholesale & retail | 1976 |
| L.Haworth Construction Limited | Construction | 2016 |
| L.I.F.E Memorial Care Ltd | Administrative & support | 2026 |
| L.J. Quantity Surveying Limited | Construction | 2012 |
| L.J.R.U.K Ltd | Transport & logistics | 2016 |
| L.J.Stoll Limited | Real estate | 1960 |
| L.K Construction & Consulting Ltd | Construction | 2026 |
| L.L.S Property Maintenance Ltd | Households | 2018 |
| L.N.O. Accounting Group Ltd | Professional & scientific | 2020 |
| L.O.R. Contracting N.E Ltd | Construction | 2022 |
| L.P.H. Management Services Limited | Financial services | 2020 |
| L.T.H IM- & Export Limited | Administrative & support | 2004 |
| L.W.Evans (Contractors) Limited | | 1962 |
| L1 Bars Limited | Hospitality | 2019 |
| L2 Venue Limited | Financial services | 2019 |
| L34DS Limited | Information & communication | 2020 |
| L8AGA1N Limited | Administrative & support | 2022 |
| LA (U.K) Public Limited Company | Professional & scientific | 2003 |
| LA Bagnes Ltd | Hospitality | 2019 |
| LA Bottega Dell'Arte Ltd | Professional & scientific | 2022 |
| LA Canadian Limited | Hospitality | 2019 |
| LA Cara Medical Ltd | Health & social care | 2025 |
| LA Cucina DA Mara Limited | Hospitality | 2020 |
| LA Cymru Production Services Limited | Information & communication | 2022 |
| LA DE DA Boutique Limited | Administrative & support | 2015 |
| LA Deesse Beauty Loft Ltd | Other services | 2019 |
| LA Developer Compliance Limited | Administrative & support | 2023 |
| LA Financial Planning Limited | Financial services | 2017 |
| LA Hospo Ltd | Hospitality | 2024 |
| LA Livraison Limited | Transport & logistics | 2018 |
| LA Maison Deluxe Limited | Real estate | 2026 |
| LA Mama Shawarma & Grill Limited | Hospitality | 2020 |
| LA Mart Limited | Wholesale & retail | 2022 |
| LA Menta Limited | Hospitality | 2017 |
| LA Mina Juice Bar Limited | Hospitality | 2021 |
| LA Perla Global Ltd | Real estate | 2015 |
| LA Pietra Ltd | Wholesale & retail | 2019 |
| LA Poricy (Oxford) Skin Management Co., Ltd. | Extraterritorial | 2018 |
| LA Power Electrical Limited | Construction | 2017 |
| LA Projects Wakefield Ltd | Construction | 2026 |
| LA Property Developers Limited | Real estate | 2017 |
| LA Reggia Ltd | Manufacturing | 2025 |
| LA Rica Supplies Ltd | Hospitality | 2020 |
| LA Sheba Hair Extensions Ltd | Wholesale & retail | 2016 |
| LA Suite DE L'Art Ltd | Wholesale & retail | 2024 |
| LA Supreme Limited | Manufacturing | 2018 |
| LA Vita Verde Limited | Wholesale & retail | 2022 |
| Laalev Ltd | Wholesale & retail | 2022 |
| LAB 19 Digital Limited | Information & communication | 2012 |
| LAB 22 (GB) Ltd | Hospitality | 2014 |
| LAB 22 (UK) Ltd | Other services | 2014 |
| LAB Class Limited | Information & communication | 2014 |
| LAB Events Ltd | Professional & scientific | 2013 |
| LAB Recordings Limited | Information & communication | 2022 |
| LAB Testing API Limited | Health & social care | 2017 |
| Labarde Management Limited | Financial services | 2018 |
| Labardi Ltd | Manufacturing | 2021 |
| Labed Limited | Real estate | 2025 |
| Labeehood Global Ltd | Wholesale & retail | 2024 |
| Labelneeds Limited | Manufacturing | 1986 |
| Labelsbyabel Ltd | Wholesale & retail | 2018 |
| Laberell Global PC | | 2018 |
| Labinformatics Limited | Information & communication | 2025 |
| Labli Consultancy Ltd | Education | 2026 |
| Labocom Limited | Professional & scientific | 2006 |
| Labont Limited | Extraterritorial | 1988 |
| Laboratory Alterations and Building Services Limited | Construction | 2020 |
| Labs Properties Limited | Real estate | 2019 |
| Labs Soft Digital Ltd | Information & communication | 2025 |
| Labyrinth Learning Limited | Education | 2013 |
| Labyrinth Tattoo Studio Limited | Arts & recreation | 2025 |
| Lacedan Ltd | Hospitality | 2025 |
| Lacegrove Limited | Real estate | 1987 |
| Lacey Landscapes Ltd | Construction | 2021 |
| Lacheela Ltd | Wholesale & retail | 2020 |
| Lacin Catering Ltd | Hospitality | 2021 |
| Lacostee Ltd | Wholesale & retail | 2025 |
| Lactobulk Ltd | Manufacturing | 2025 |
| Lacuna RTM Company Limited | Households | 2012 |
| Ladverts Ltd | Financial services | 2023 |
| Lady Boss Stitch Ltd | Manufacturing | 2024 |
| Lady Healthcare LLP | | 2012 |
| Lady Mary Stores Limited | Wholesale & retail | 2018 |
| Lady Nails & Spa Limited | Other services | 2024 |
| Ladybird Trading Limited | Wholesale & retail | 2021 |
| Ladybirds Cleaning Services Ltd. | Households | 2006 |
| Ladybirds Day Nursery Limited | Health & social care | 2005 |
| Ladytech Repair Ltd | Other services | 2024 |
| Ladyvogue Limited | Wholesale & retail | 2025 |
| Lael Properties Ltd | Real estate | 2021 |
| Laennec AI Limited | Professional & scientific | 2022 |
| Laenter Huningo Ltd | Wholesale & retail | 2025 |