| Logifusion Ltd | Construction | 2024 |
| Logimate Shipping & Logistics Limited | Transport & logistics | 2025 |
| Logistic Transport Systems (UK) Ltd | Transport & logistics | 2005 |
| Logisticah Services Ltd | Education | 2023 |
| Logistics and Transport Services Limited | Administrative & support | 2010 |
| Logistics Connections Ltd | Transport & logistics | 2026 |
| Logistride Limited | Transport & logistics | 2025 |
| Logistrium Ltd | Wholesale & retail | 2025 |
| Logos COW Shoe Ltd | Wholesale & retail | 2026 |
| Loice Mayombo Limited | Health & social care | 2023 |
| LOK TIN Holding Limited | Financial services | 2026 |
| Loku's Barber Ltd | Other services | 2023 |
| LOL Civils Ltd | Construction | 2025 |
| Lolly Care Limited | Health & social care | 2023 |
| Lolly Homeless Care Services Limited | Health & social care | 2025 |
| LOM Transport Ltd | Transport & logistics | 2020 |
| Lomasannyoung Properties Ltd | Real estate | 2025 |
| Lombi Ltd | Wholesale & retail | 2026 |
| Lomee Ltd | Wholesale & retail | 2026 |
| London & Gulf Real Estate Limited | Real estate | 2013 |
| London & Nationwide Express Ltd | | 1985 |
| London Airports Taxi Service Ltd | Transport & logistics | 2020 |
| London and Hertfordshire Employment Limited | Administrative & support | 2026 |
| London Arbitration Centre Limited | Professional & scientific | 2014 |
| London Barrel Maker Limited | Administrative & support | 2011 |
| London Building Services - LBS Ltd | Construction | 2020 |
| London Capital Investment Group Limited | Financial services | 2018 |
| London Cars Club Ltd | Wholesale & retail | 2025 |
| London Casino Slots Limited | Arts & recreation | 2025 |
| London Catering Supplies Limited | Hospitality | 2017 |
| London Centre of International Studies Ltd | Education | 2019 |
| London Community College | Administrative & support | 2001 |
| London Daily Needs Ltd | Wholesale & retail | 2020 |
| London Edge Estates Limited | Real estate | 2005 |
| London Golf Residence Airport Ltd | Real estate | 2020 |
| London Homeworks Ltd | Construction | 2025 |
| London Horizon Trading Ltd | Wholesale & retail | 2025 |
| London Hybrid Motors Limited | Wholesale & retail | 2024 |
| London Ideal Home Ltd | Real estate | 2023 |
| London Labour Solutions Ltd | Construction | 2017 |
| London Legal Consultants Ltd | Professional & scientific | 2025 |
| London Luggage Limited | Wholesale & retail | 2021 |
| London Luton Airport Group Limited | Administrative & support | 1998 |
| London Luton Airport Holdings I Limited | Financial services | 2013 |
| London Luton Airport Holdings II Limited | Financial services | 2013 |
| London Luton Airport Holdings III Limited | Financial services | 2013 |
| London Luton Airport Limited | Real estate | 1986 |
| London Luton Airport Operations Limited | Transport & logistics | 1998 |
| London Luton Airport Taxis Limited | Transport & logistics | 2026 |
| London Luton Property Contractors Limited | Real estate | 2018 |
| London Luton Removals Ltd | Transport & logistics | 2025 |
| London Luxury Sold Ltd | Information & communication | 2025 |
| London Marketing Consultants Limited | Wholesale & retail | 2011 |
| London Narrow Boat Project | Hospitality | 1992 |
| London New Properties Limited | Real estate | 2022 |
| London Online Trading Limited | Wholesale & retail | 2018 |
| London Perfume Factory Luton Ltd | Wholesale & retail | 2016 |
| London Pro Tilers Ltd | Construction | 2021 |
| London Rolfing Limited | Health & social care | 2015 |
| London SB Ltd | Transport & logistics | 2023 |
| London Science Point Ltd | Information & communication | 2020 |
| London Skills for Development UK Limited | Education | 2022 |
| London Smart Academy Ltd | Information & communication | 2011 |
| London Student Services Limited | Education | 2020 |
| London Thames Cleaning Ltd | Administrative & support | 2018 |
| London Trading Services Ltd. | Construction | 2019 |
| London UK Star Ltd | Wholesale & retail | 2017 |
| London Vehicle Rentals Limited | Administrative & support | 2021 |
| London Youth Conservatoire | Education | 2009 |
| Londonezy Music Limited | Administrative & support | 2017 |
| Long Landscapes Development Ltd | Administrative & support | 2025 |
| Long Victory Company Ltd | Hospitality | 2024 |
| Long-Range Europe Limited | Wholesale & retail | 2001 |
| Long-Term Investments (Beds) Limited | Construction | 2012 |
| Longacres Management Limited | Households | 1986 |
| Longhorn Farm Limited | Agriculture & fishing | 2021 |
| Longreach Plastering Limited | Construction | 2017 |
| Longridge Technology Limited | Information & communication | 2025 |
| Loni Rail Ltd | Construction | 2026 |
| Lonko Design Ltd | Professional & scientific | 2024 |
| Look N Buy Limited | Information & communication | 2022 |
| Loop Leads Ltd | Information & communication | 2024 |
| Loopcrest Ltd | Administrative & support | 2025 |
| Loopy Motors Ltd | Wholesale & retail | 2026 |
| Lord Indian Limited | Hospitality | 2017 |
| Lori&Ani Ltd | Administrative & support | 2022 |
| Lorien Limited | Administrative & support | 2009 |
| Lorien Resourcing Limited | Administrative & support | 1977 |
| Lorna Meldrum Ltd | Construction | 2025 |
| Loroch Property Ltd | Real estate | 2023 |
| Lorus Ltd | Transport & logistics | 2024 |
| Lory Ltd | Transport & logistics | 2018 |
| Lostear Ltd | Wholesale & retail | 2021 |
| LOT Drops Ltd | Wholesale & retail | 2025 |
| Lotchken Wadwa Ltd | Construction | 2019 |
| Lotus Imperial Ltd | Real estate | 2022 |
| Lotus Infotech Ltd | Information & communication | 2015 |
| Lotus Medical Estates Limited | Real estate | 2006 |
| Lotus Realty Management Limited | Real estate | 2025 |
| Louis DE Soissons Limited | Professional & scientific | 2015 |