| Kunco Logistics Ltd | Transport & logistics | 2014 |
| Kurusha Ltd | Education | 2019 |
| Kusini Safaris Limited | Administrative & support | 2018 |
| Kutumb Ltd | Health & social care | 2026 |
| Kwik Technologies Limited | Information & communication | 2025 |
| Kyrali Ltd | Real estate | 2021 |
| Kyvera Limited | Information & communication | 2025 |
| L H Carpentry Limited | Construction | 2016 |
| L&B Property Management Ltd | Real estate | 2025 |
| L&C Williams Properties Limited | Real estate | 2017 |
| L&M Rock Properties Limited | Real estate | 2025 |
| L.A Heating Ltd | Professional & scientific | 2021 |
| L.A. Modelling Ltd | Arts & recreation | 2019 |
| LA Roofing & Leadwork Ltd | Construction | 2026 |
| Labram Property Management Limited | Households | 2023 |
| Laidon UKI Ltd | Wholesale & retail | 2025 |
| Lains Estates Limited | Real estate | 2013 |
| Lains Shooting School Limited | Arts & recreation | 2009 |
| Lally's Flooring and Building Ltd | Construction | 2025 |
| Lambda Developments Limited | Real estate | 1999 |
| Land Interests Limited | Real estate | 2017 |
| Landlord Pro Ltd | Information & communication | 2026 |
| Langdown Estates LLP | | 2015 |
| Lant Telecoms Ltd | Information & communication | 2018 |
| Laos Orchid Hair Spa Ltd | Other services | 2026 |
| Latrobe Services Ltd | Construction | 2025 |
| Lavender Platinum Ltd | Hospitality | 2024 |
| Lawns Close Management Company Limited | Households | 2017 |
| LC Maintance Ltd | Construction | 2025 |
| LDN Luxury Travel Ltd | Transport & logistics | 2021 |
| LE Creuset Holding Limited | Financial services | 2015 |
| LE Creuset U.K. Limited | Wholesale & retail | 1948 |
| LE Massif Ltd | Professional & scientific | 2024 |
| Leathersmart Ltd | Other services | 2019 |
| Ledsynergy (Displays) Ltd. | Manufacturing | 2001 |
| Ledsynergy Limited | Manufacturing | 2015 |
| LEE Foyle Plumbing & Heating Ltd | Construction | 2022 |
| LEE LOW Studio Ltd | Real estate | 2024 |
| Leemook Accounting Services Limited | Professional & scientific | 2013 |
| Leeshdezynes Limited | Manufacturing | 2023 |
| Leigh Williams Windows Limited | Wholesale & retail | 2014 |
| Leonard Antony Ltd | Other services | 2022 |
| Leopard Print Press Ltd | Information & communication | 2022 |
| LES Johnson Sculptor Ltd | Arts & recreation | 2009 |
| Levelheaded Financial Management Limited | Professional & scientific | 2014 |
| LG Aesthetic Ltd | Health & social care | 2020 |
| LG Lift Services UK Ltd | Construction | 2018 |
| LGS Fast Services Ltd | Construction | 2018 |
| LHD Automotive Ltd | Wholesale & retail | 2024 |
| Lhtr Limited | Professional & scientific | 2023 |
| Liddell Enterprises Limited | Agriculture & fishing | 1973 |
| Lift Studios Ltd | Arts & recreation | 2020 |
| Limitless With Lacey Ltd | Other services | 2026 |
| Limpet Store Limited | Wholesale & retail | 2021 |
| Lincad Drawing Services Ltd | Information & communication | 2013 |
| Lindy's Events Ltd | Hospitality | 2012 |
| Linea Water Solutions Ltd | Water & waste | 2026 |
| Linhof & Studio Limited | Wholesale & retail | 1993 |
| Linkenholt Shepherd Huts Ltd | Manufacturing | 2021 |
| Linley Enterprises Limited | Professional & scientific | 2023 |
| Lionel Hitchen Limited | Manufacturing | 1965 |
| Lionel Hitchen USA Limited | Hospitality | 2007 |
| Lions Logistics Support Ltd | Transport & logistics | 2021 |
| LIQUIDH2O Limited | Professional & scientific | 2018 |
| Liquidity UK Ltd | Professional & scientific | 2002 |
| Little Druids Nursery Limited | Health & social care | 2018 |
| Little Shoddesden Properties LLP | | 2016 |
| Livia Perfect Health Ltd | Health & social care | 2015 |
| LJW Sales Consultancy Limited | Information & communication | 2018 |
| LKS Global Ltd | Financial services | 2020 |
| Lloyd-Baker LLP | | 2014 |
| LOA Andover Ltd | Hospitality | 2022 |
| Lock's Drove Farm Limited | Agriculture & fishing | 2007 |
| Loft Insulation Experts Ltd | Construction | 2022 |
| Logistify Limited | Professional & scientific | 2014 |
| Lol-Trans Ltd | Transport & logistics | 2013 |
| London Roof(London) Ltd | Construction | 2015 |
| Longar Industries Limited | Manufacturing | 1970 |
| Lopezmocktails Ltd | Hospitality | 2020 |
| Lordspattern Ltd | Financial services | 2012 |
| Lost Boys Projects Ltd | Professional & scientific | 2014 |
| Love Andover Limited | Information & communication | 2017 |
| Lovell James Consulting Ltd | Administrative & support | 2018 |
| Lovely Finds Emporium Limited | Wholesale & retail | 2026 |
| Loviro Ltd | Real estate | 2021 |
| Lowecom Ltd | Wholesale & retail | 2025 |
| LS Lifts Limited | Construction | 2015 |
| LS UK Property Group Limited | Real estate | 2024 |
| Lsja Ltd | Manufacturing | 2025 |
| Luca Transport Ltd | Transport & logistics | 2012 |
| Lucas GAS Ltd | Construction | 2020 |
| Lucas Refurbishments Ltd | Construction | 2025 |
| Lucinda and Lissa Green Limited | Arts & recreation | 2015 |
| Ludgershall Auto Centre Ltd | Wholesale & retail | 2024 |
| Ludgershall Properties Ltd | Households | 2026 |
| Lumenav Ltd | Information & communication | 2018 |
| Lumigen Developments Ltd | Construction | 2024 |
| Lusso Leaf Limited | Agriculture & fishing | 2020 |
| Lutashie Limited | Health & social care | 2019 |
| Luxe Nails & Spa Ludgershall Ltd | Other services | 2025 |