| Kolenz Electric Co., Ltd | Extraterritorial | 2015 |
| Kong CV1 Limited | Wholesale & retail | 2011 |
| Konmann Seiko Technology Co., Limited | Administrative & support | 2023 |
| Koolcom Group Ltd | Wholesale & retail | 2020 |
| Kora Sustainability Limited | Information & communication | 2021 |
| KPC Therapy Centre Limited | Health & social care | 2002 |
| Kram Holdings Ltd | Professional & scientific | 2021 |
| Kreta Technology Ltd | Extraterritorial | 2017 |
| KSL7 Properties Ltd | Real estate | 2019 |
| Kslehal Ltd | Financial services | 2012 |
| Ktscc Limited | Arts & recreation | 2026 |
| Kunpeng International Co., Ltd | Administrative & support | 2015 |
| Kuntuo International Trade Co., Ltd | Administrative & support | 2022 |
| Kunyuan Trading Co., Ltd | Extraterritorial | 2019 |
| Kuso Construction Ltd | Construction | 2020 |
| Kynaston Road Property Limited | Households | 2013 |
| KZ Capital International Co., Ltd | Wholesale & retail | 2019 |
| L & M Domestic Scaffolding Limited | Administrative & support | 2013 |
| L F Pro Ltd | Extraterritorial | 2007 |
| L&A Int'L Industry Co., Limited | Manufacturing | 2017 |
| L&C Industry Supply Co., Ltd | Administrative & support | 2014 |
| L&K International Trading Co., Ltd | Extraterritorial | 2016 |
| L&Y International Trading Ltd | Administrative & support | 2026 |
| L'Academie Limited | Other services | 2004 |
| L.D.Expert Limited | Extraterritorial | 2021 |
| LA ARI Ltd | Wholesale & retail | 2021 |
| Labarche Trading China Branch Co., Ltd | Extraterritorial | 2013 |
| Labora Investments Limited | Financial services | 2015 |
| Lacovia International Limited | Manufacturing | 2016 |
| Laggan Limited | Real estate | 1998 |
| LAJ Architectural Design Ltd | Professional & scientific | 2017 |
| Lake District Cottages Limited | Hospitality | 2008 |
| Lambert Holdings Limited | Administrative & support | 1996 |
| Lancaster Holdings Limited | Wholesale & retail | 2017 |
| Land at Back Ends SPV Ltd | Real estate | 2025 |
| Land at Bourton on the Hill SPV Limited | Construction | 2023 |
| Land at Carterton SPV Ltd | Real estate | 2024 |
| Land at Charlbury SPV Ltd | Real estate | 2023 |
| Land at Clifton Hall Farm SPV Ltd | Construction | 2023 |
| Land at Crays Pond SPV Limited | Real estate | 2024 |
| Land at Great Rissington SPV Ltd | Real estate | 2024 |
| Land at Grevel Lane 1 SPV Limited | Real estate | 2020 |
| Land at Kemble 2 SPV Ltd | Construction | 2025 |
| Land at Leighterton Holdco SPV Limited | Financial services | 2025 |
| Land at Leighterton SPV Ltd | Real estate | 2024 |
| Land at Mickleton SPV Ltd | Construction | 2026 |
| Land at Milton SPV Ltd | Real estate | 2025 |
| Land at Nether Westcote SPV Limited | Construction | 2022 |
| Land at Park Road Campden SPV Ltd | Construction | 2026 |
| Land at Parnham SPV Ltd | Real estate | 2024 |
| Land at Shipston SPV Ltd | Construction | 2023 |
| Land at Stow on the Wold SPV Ltd | Real estate | 2025 |
| Land at Temple Guiting Holdco SPV Ltd | Real estate | 2025 |
| Land at Temple Guiting SPV Ltd | Construction | 2022 |
| Land at the Sheppey SPV Ltd | Construction | 2022 |
| Land at the Warwickshire 1 SPV Limited | Real estate | 2019 |
| Land at Walgrave SPV Limited | Real estate | 2024 |
| Land at Willersey SPV Ltd | Construction | 2023 |
| Lanro Investments Ltd | Hospitality | 2020 |
| Lansdowne Associates Limited | Transport & logistics | 1992 |
| Lapiere Management Ltd | Extraterritorial | 2024 |
| Laserarch Properties Limited | Construction | 1984 |
| Lataya TMS LLP | | 2023 |
| Laurel Court Management (Coventry) Limited | Real estate | 2000 |
| Lavish Construction & Facilities Management Ltd | Professional & scientific | 2016 |
| Lavish Group Ltd | Professional & scientific | 2000 |
| Lavish Home Improvements Ltd | Real estate | 2016 |
| Lavish Phkb Ltd | Professional & scientific | 2024 |
| Lavish Property Holdings Ltd | Real estate | 2019 |
| Layman Solutions Limited | Information & communication | 1997 |
| Lazbaz Ltd | Hospitality | 2024 |
| LC Studio Limited | Professional & scientific | 2001 |
| Lcr&Fb Trading Co., Ltd | Wholesale & retail | 2024 |
| LE Bowke Logistics Limited | Transport & logistics | 2007 |
| Leading Edge Global Communications Ltd | Professional & scientific | 2019 |
| Leamlink Limited | Transport & logistics | 2013 |
| Learn AS YOU Go Ltd | Education | 2023 |
| Leblanc Trading Co., Ltd | Extraterritorial | 2019 |
| Leek Wootton Village Hall Limited | Arts & recreation | 2005 |
| Leena Trading Co., Limited | Wholesale & retail | 2020 |
| Legal Advice Warwickshire Limited | Professional & scientific | 2021 |
| Legal IT Solutions Limited | Information & communication | 2004 |
| Legaleese Limited | Professional & scientific | 2007 |
| Leisure Concepts Design Limited | Professional & scientific | 2001 |
| Leisure Concepts Limited | Professional & scientific | 1995 |
| Leisurelines (Kenilworth) Limited | Extraterritorial | 2011 |
| Lembor Limited | Professional & scientific | 2014 |
| Lemon Trade Ltd | Extraterritorial | 2024 |
| Lena Gore Coaching Ltd | Professional & scientific | 2021 |
| Leqe Co., Ltd | Administrative & support | 2020 |
| Lever Outdoor Products Co., Ltd | Extraterritorial | 2024 |
| LEX Direct Limited | Professional & scientific | 2011 |
| Leyes Lane Pharmacy Limited | Wholesale & retail | 2014 |
| LF Clinics Limited | Health & social care | 2025 |
| LF Investments Limited | Financial services | 2017 |
| Lf-Km Holdings Limited | Real estate | 2020 |
| LI ZE Shipping Co., Ltd | Other services | 2020 |
| LID Raisers Limited | Information & communication | 2011 |
| Life Equilibrium Ltd | Manufacturing | 2019 |
| Lifenology UK Limited | Manufacturing | 2022 |