| LME Recruitment Limited | Administrative & support | 2022 |
| Lmkclarkesolutions Ltd | Transport & logistics | 2025 |
| LMS Curry Company Ltd | Hospitality | 2025 |
| LMS Group Ltd | Construction | 2020 |
| LN Consultancy Services Ltd | Professional & scientific | 2019 |
| Lnation Ltd | Information & communication | 2024 |
| LNC Limited | Information & communication | 2014 |
| LNE Electrical Maintenance Services Limited | Construction | 2026 |
| LNF Coaching Limited | Arts & recreation | 2012 |
| Loading Center Logistics Ltd | Transport & logistics | 2013 |
| Loadstar Hedge Holdco Limited | Financial services | 2023 |
| Loal Consultancy Ltd | Financial services | 2018 |
| Lobis Hill Limited | Real estate | 2022 |
| Local Adventures Limited | Education | 2024 |
| Local Express Cabs Ltd | Transport & logistics | 2023 |
| Local Self Storage Limited | Transport & logistics | 2017 |
| Locate Surveys Ltd | Professional & scientific | 2012 |
| Lock & Legend Events Ltd | Information & communication | 2025 |
| Locke Financial Limited | Financial services | 2016 |
| Lockmech Ltd | Wholesale & retail | 2025 |
| Lockslots Limited | Information & communication | 2023 |
| Lockwood Contract Packing Ltd | Extraterritorial | 2013 |
| Lockwood Packaging Group Ltd | Professional & scientific | 2013 |
| Lockwood Packaging Ltd | Manufacturing | 1994 |
| Lockwood Vacuum Forming Ltd | Extraterritorial | 2013 |
| Locus Management Solutions Ltd | Administrative & support | 2005 |
| Lodge Lane Estates Ltd | Real estate | 2021 |
| Loft Boarding Services Ltd | Construction | 2017 |
| Lofty Heights C.I.C. | Health & social care | 2012 |
| Logicentra Solutions Ltd | Information & communication | 2026 |
| Logie Property Co Limited | Real estate | 2020 |
| Logie Property Holding Co Limited | Real estate | 2020 |
| Logik Interiors Ltd | Construction | 2005 |
| Logistics Bureau International Limited | Transport & logistics | 2024 |
| Logoods Ltd | Wholesale & retail | 2025 |
| Lokahi Creative Limited | Professional & scientific | 2020 |
| Lokesh Trading UK Ltd | Construction | 2019 |
| Loki Transport Ltd | Transport & logistics | 2015 |
| Lolerguy Inspections Ltd | Professional & scientific | 2026 |
| Lomax Roofing Limited | Construction | 2007 |
| Lombard Shipping PLC | Transport & logistics | 1985 |
| London & Essex Auto Electrics Ltd | Wholesale & retail | 2010 |
| London Biological Laboratories Ltd | Education | 2012 |
| London Holiday Limited | Administrative & support | 2016 |
| London Luxury Massage Ltd | Other services | 2026 |
| London Medicals EN Ltd | Wholesale & retail | 2015 |
| London Town Property Investments Ltd | Real estate | 2022 |
| Londonbuildsol Ltd | Construction | 2016 |
| Longstop Investments Ltd. | Real estate | 1994 |
| Longstop Management Limited | Extraterritorial | 2002 |
| Loni Taxi Ltd | Transport & logistics | 2023 |
| Lonsdale Suffolk Ltd | Real estate | 2021 |
| Lonzik Ltd | Households | 2024 |
| Look Good Feel Great Nutrition Limited | Health & social care | 2025 |
| Look Wright Laser and Facial Aesthetics Ltd | Other services | 2023 |
| Lookin Sharp Barber Ltd | Other services | 2019 |
| Loose Cannons Conditioning Limited | Health & social care | 2020 |
| Loose Hall Farm Limited | Agriculture & fishing | 1953 |
| Lorana Services Limited | Wholesale & retail | 2023 |
| Lord & Lady Furneaux Limited | Real estate | 2008 |
| Lorericiu RDL Ltd | Transport & logistics | 2019 |
| Lorrimar Investments Limited | Real estate | 2000 |
| LOSTBO6999 Ltd | Wholesale & retail | 2025 |
| LOTS2GO Ltd | Administrative & support | 2025 |
| Lottie Leigh Ltd | Wholesale & retail | 2024 |
| Lotus Construction EA Ltd | Construction | 2025 |
| LOU & TAN Limited | Real estate | 2025 |
| Louie Bennett-Walsh Limited | Financial services | 2022 |
| Louis Gandolfi and Sons Limited | Professional & scientific | 2020 |
| Louise Alexander Ltd | Professional & scientific | 2022 |
| Louise Cobbold Art Limited | Arts & recreation | 2020 |
| Louise Rogers Limited | Professional & scientific | 2014 |
| Louisgardnercarpentry Ltd | Construction | 2022 |
| Loumic Consultancy Ltd | Professional & scientific | 2024 |
| Loumic Property Ltd | Real estate | 2024 |
| Lounge Grooming Ltd | Other services | 2020 |
| Lourdes Care Ltd | Administrative & support | 2022 |
| Louzeck Limited | Wholesale & retail | 2023 |
| Love & Williams Ltd | Arts & recreation | 2011 |
| Love Baby Scans Limited | Health & social care | 2024 |
| Love LHE Burger Ltd | Hospitality | 2025 |
| Love of Beauty Limited | Administrative & support | 2019 |
| Love Outdoor Grilling Limited | Extraterritorial | 2021 |
| Lovell Health Ltd | Health & social care | 2023 |
| Lovell Landscape Solutions Ltd | Administrative & support | 2025 |
| Lovellsolutions Ltd | Real estate | 2024 |
| Lovely Little Properties LLP | | 2024 |
| LOW Motion Limited | Wholesale & retail | 2026 |
| Low-Cal Flares Limited | Manufacturing | 2010 |
| LOW7UP Ltd | Transport & logistics | 2023 |
| Lowe Capital Limited | Real estate | 2026 |
| Lower LEY Ltd | Professional & scientific | 2015 |
| Lowestoft Vision Ltd | Other services | 2012 |
| Loweth Maintenance Limited | Administrative & support | 2013 |
| Loyal Express Cabs Ltd | Transport & logistics | 2023 |
| Loyalty Cars Ipswich Ltd | Wholesale & retail | 2024 |
| Loyl Group Limited | Other services | 2026 |
| LOZ Electrical Service Ltd | Construction | 2023 |
| LPA Brandy Ltd | Wholesale & retail | 2025 |
| LPH Automotive Ltd | Wholesale & retail | 2025 |