| Lokmatic Limited | Information & communication | 2023 |
| Lomart Limited | Wholesale & retail | 1991 |
| Londinius Ltd | Administrative & support | 2017 |
| London Autocare Ltd | Wholesale & retail | 2019 |
| London Bonsai Limited | Agriculture & fishing | 2024 |
| London Builders Ealing Limited | Construction | 2022 |
| London Coastal Ltd | Construction | 2026 |
| London Cooperate Building Ltd | Construction | 2016 |
| London Crystal Window Cleaning Co Limited(The) | Professional & scientific | 1946 |
| London Culture and Media Group Ltd | Professional & scientific | 2019 |
| London Darvaz Property Management Ltd | Real estate | 2026 |
| London Eco Build Ltd | Construction | 2026 |
| London Electric Services Ltd | Construction | 2017 |
| London Event DJS Ltd | Arts & recreation | 2018 |
| London Fencing Group Ltd | Administrative & support | 2024 |
| London Food Machinery Limited | Administrative & support | 2010 |
| London Global Educational Limited | Education | 2025 |
| London Grace Commerce Limited | Other services | 2023 |
| London Grill House Limited | Hospitality | 2024 |
| London Imperial Security UK Limited | Administrative & support | 2014 |
| London Infrastructure AS Code Ltd | Information & communication | 2019 |
| London Kitchens and Stone Worktops Ltd | Manufacturing | 2025 |
| London Landscape Group Ltd | Administrative & support | 2023 |
| London Living Rent Ltd | Real estate | 2021 |
| London Luggage Centre Limited | Wholesale & retail | 2019 |
| London Medicolegal Services Ltd | Health & social care | 2012 |
| London Motorbike Ltd | Wholesale & retail | 2025 |
| London Ophthal Limited | Health & social care | 2024 |
| London Prime Carpet Cleaning Ltd | Administrative & support | 2026 |
| London Psychiatric Clinic Limited | Health & social care | 2008 |
| London Renovate Limited | Construction | 2014 |
| London Safe and Secure Ltd | Other services | 2018 |
| London School of Innovation Ltd | Education | 2019 |
| London Soundproofing R US Limited | Construction | 2022 |
| London South DRY Cleaners Limited | Other services | 2020 |
| London South East Construction Ltd | Construction | 2019 |
| London Telugu Radio Ltd | Information & communication | 2025 |
| London Underpinning Construction Ltd | Construction | 2014 |
| London's Mobile Nails Limited | Other services | 2022 |
| Londons Home FIX Ltd | Administrative & support | 2019 |
| Long Island INK Ltd | Other services | 2010 |
| Longacre Court Management Limited | Professional & scientific | 1989 |
| Longbox Media Ltd | Information & communication | 2024 |
| Looop Ltd | Information & communication | 2026 |
| Loot Stacz Music Limited | Extraterritorial | 2018 |
| Lorac Court (Sutton) Limited | Real estate | 2018 |
| Lord's Mercy Limited | Health & social care | 2015 |
| Lorems Properties Ltd | Construction | 2025 |
| Lorenzo UNO Ltd | Construction | 2018 |
| Lorven Estates Limited | Real estate | 2020 |
| Lorven Global Services Limited | Information & communication | 2014 |
| Lost Seouls Club Ltd | Wholesale & retail | 2021 |
| Lotus Ceramic World Ltd | Wholesale & retail | 2026 |
| Louiemay Limited | Households | 2013 |
| Lovatts Publications Limited | Extraterritorial | 1998 |
| Love Community Trust C.I.C. | Arts & recreation | 2023 |
| Love Crepe Ltd | Hospitality | 2015 |
| Love Fridays Ltd | Wholesale & retail | 2019 |
| Love Your Crafts Limited | Administrative & support | 2019 |
| Loving Care Training Centre (Nursing and Care Services) Limited | Administrative & support | 2002 |
| LOW Cost Roofing Limited | Construction | 2025 |
| Lowendaa Ltd | Wholesale & retail | 2022 |
| Lowes Construction Ltd | Construction | 2019 |
| LP 78 Ltd | Real estate | 2024 |
| LP Agency Ltd | Professional & scientific | 2015 |
| LP Developments Surrey Ltd | Construction | 2015 |
| LP SD Eighty Eight Limited | Wholesale & retail | 2023 |
| LP SD Eighty Four Limited | Wholesale & retail | 2023 |
| LP SD Eighty Nine Limited | Wholesale & retail | 2023 |
| LP SD Eighty Three Limited | Wholesale & retail | 2023 |
| LP SD Fifty Four Limited | Wholesale & retail | 2023 |
| LP SD Fifty Limited | Wholesale & retail | 2023 |
| LP SD Fifty One Limited | Wholesale & retail | 2023 |
| LP SD Fifty Three Limited | Wholesale & retail | 2023 |
| LP SD Fifty Two Limited | Wholesale & retail | 2023 |
| LP SD Forty Eight Limited | Wholesale & retail | 2023 |
| LP SD Forty Seven Limited | Wholesale & retail | 2023 |
| LP SD Ninety Four Limited | Wholesale & retail | 2023 |
| LP SD Ninety One Limited | Wholesale & retail | 2023 |
| LP SD Ninety Seven Limited | Wholesale & retail | 2023 |
| LP SD Ninety Three Limited | Wholesale & retail | 2023 |
| LP SD One Hundred Five Limited | Wholesale & retail | 2023 |
| LP SD One Hundred Four Limited | Wholesale & retail | 2023 |
| LP SD One Hundred Limited | Wholesale & retail | 2023 |
| LP SD One Hundred One Limited | Wholesale & retail | 2023 |
| LP SD One Hundred TEN Limited | Wholesale & retail | 2023 |
| LP SD One Hundred Three Limited | Wholesale & retail | 2023 |
| LP Training Academy Ltd | Professional & scientific | 2022 |
| LPG Fibre Limited | Construction | 2024 |
| LPM - 22 Ltd | Transport & logistics | 2023 |
| Lprops Ltd | Real estate | 2018 |
| LQ Dog Walking Ltd | Agriculture & fishing | 2026 |
| LR Cleaning Services Ltd | Administrative & support | 2013 |
| LS Ticket Hub Ltd | Wholesale & retail | 2023 |
| LSA OIL Limited | Wholesale & retail | 2015 |
| LSA OIL Ramsgate Limited | Wholesale & retail | 2019 |
| LSA OIL Reigate Limited | Wholesale & retail | 2018 |
| LSA OIL Telscombe Ltd | Wholesale & retail | 2016 |
| LSA Retail Ltd | Wholesale & retail | 2015 |
| LSA Retail Property Ltd | Construction | 2020 |