| Longguo Group Limited | Manufacturing | 2024 |
| Longhua Culture Media Co., Ltd | Wholesale & retail | 2025 |
| Longriver Global Advisory Limited | Professional & scientific | 2025 |
| Longrove Farms Limited | Agriculture & fishing | 2018 |
| Longs Property Limited | Real estate | 2017 |
| Longstanton and Northstowe Healthcare Limited | Wholesale & retail | 2020 |
| Longstart Limited | Wholesale & retail | 1985 |
| Longton Landscaping Ltd | Extraterritorial | 2022 |
| Longtown Rosetrees Residents Company Limited | Households | 2004 |
| Longventure Limited | Real estate | 1985 |
| Longway Industrial Co., Limited | Manufacturing | 2017 |
| Lonshine Industrial Co., Ltd | Manufacturing | 2015 |
| Look Ahead Limited | Other services | 2012 |
| LOOP52 Ltd | Information & communication | 2025 |
| Looplabs | Professional & scientific | 2013 |
| Loose Ship Limited | Arts & recreation | 2008 |
| Lopfire Designs Ltd | Wholesale & retail | 2020 |
| Lord Pesto Limited | Wholesale & retail | 2026 |
| Lorianne Ltd | Manufacturing | 2025 |
| Loris Freehold Limited | Households | 2005 |
| Lornag Ltd | Wholesale & retail | 2025 |
| LOS Polistas Ltd | Wholesale & retail | 2024 |
| Losentus (UK) Ltd | Manufacturing | 2024 |
| Lostboyz Marine Ltd | Manufacturing | 2019 |
| LOT 25 Limited | Hospitality | 2012 |
| Lotanina Ltd | Real estate | 2025 |
| Lote Tree Press Ltd | Information & communication | 2019 |
| Lottie's Little America Limited | Hospitality | 2018 |
| Lottielab Ltd | Information & communication | 2021 |
| Lotties Base Ltd | Hospitality | 2022 |
| Lottle Limited | Information & communication | 2018 |
| Lotus Lake Ltd | Hospitality | 2019 |
| LOU Carter Limited | Arts & recreation | 2014 |
| LOU Entertainment Holding Ltd | Financial services | 2025 |
| Loud Architectural Design Consulting Ltd | Extraterritorial | 2018 |
| Louie Limited | Wholesale & retail | 2017 |
| Louise Buckle Property Limited | Financial services | 2018 |
| Louise Eldridge Ltd | Wholesale & retail | 2025 |
| Louispolo London Private Limited | Extraterritorial | 2025 |
| Loupe Works Ltd | Manufacturing | 2026 |
| Loupin Limited | Wholesale & retail | 2013 |
| LOV Properties Ltd | Real estate | 2019 |
| Love CBD Health Ltd | Wholesale & retail | 2020 |
| Love in a CUP Limited | Hospitality | 2010 |
| Love Life Supplements Limited | Wholesale & retail | 2011 |
| Love Millie Limited | Wholesale & retail | 2017 |
| Love Tennis Academy Limited | Arts & recreation | 2017 |
| Love to Cook Limited | Wholesale & retail | 2025 |
| Lovejoy's Ltd | Hospitality | 2019 |
| Lovell Lodge Investments Ltd | Construction | 2004 |
| Lovell Road Ltd | Real estate | 2023 |
| Lovells Nails Ltd | Other services | 2023 |
| Loving Vincent Distribution Limited | Information & communication | 2015 |
| Loving Vincent Limited | Information & communication | 2013 |
| Lowcare Ltd | Health & social care | 2023 |
| Lowfoam Productions Limited | Information & communication | 2026 |
| Lowrisc C.I.C. | Manufacturing | 2014 |
| Lowther Avenue (Moulton) Management Company Limited | Households | 2017 |
| Loxia Wood Property Management Limited | Households | 2003 |
| Loyal-T Ltd | Information & communication | 2023 |
| Loyalty Financial Solutions Limited | Financial services | 2021 |
| Lozi Limited | Hospitality | 2001 |
| LP Bookkeeping Limited | Professional & scientific | 2016 |
| LP Innovations Ltd | Construction | 2014 |
| LPE Financial Group Limited | Professional & scientific | 2017 |
| LRM Services Ltd | Professional & scientific | 2026 |
| LS Aircraft Interiors Ltd | Manufacturing | 2022 |
| LS Developments (Norfolk) Ltd | Real estate | 2025 |
| LS Hospitality Ltd | Hospitality | 2021 |
| LS Kart Limited | Wholesale & retail | 2025 |
| LSB Market Ltd | Wholesale & retail | 2020 |
| Lscc Holdings Ltd | Financial services | 2025 |
| LSL Surfacing Ltd | Construction | 2010 |
| Lsmd Engineering Ltd | Manufacturing | 2026 |
| LST Holdings Ltd | Real estate | 2021 |
| LT Lighting & Electricals Ltd | Wholesale & retail | 2011 |
| LT Valeting Services Ltd | Wholesale & retail | 2018 |
| LT123 Limited | Extraterritorial | 2019 |
| Ltac Investments Ltd | Real estate | 2022 |
| LTC Solutions Design Limited | Professional & scientific | 2016 |
| LTC Testing & Certification Limited | Extraterritorial | 2020 |
| LTE Scientific Limited | Manufacturing | 1991 |
| LTH Longnn Limited | Manufacturing | 2025 |
| LU Weiguo Ltd | Wholesale & retail | 2025 |
| LUB International Corporation Ltd | Extraterritorial | 2019 |
| Lubemaxx Lubricants Ltd | Other services | 2021 |
| Luc.Omposit Ltd | Manufacturing | 2025 |
| Lucas Close Freehold Limited | Households | 2020 |
| Lucas Medical Limited | Other services | 2019 |
| Lucas Oliver Counselling & Training Ltd | Health & social care | 2024 |
| Luceat Academics Ltd | Education | 2024 |
| Lucent AI Ltd | Administrative & support | 2025 |
| Lucida Medical Ltd | Professional & scientific | 2019 |
| Lucie Arnaud Ltd | Professional & scientific | 2014 |
| Lucille Industrial Co., Limited | Wholesale & retail | 2024 |
| Lucin Ltd | Information & communication | 2024 |
| Lucis Global Ltd | Other services | 2022 |
| Lucky a Limited | Professional & scientific | 2023 |
| Lucky Trading Enterprises Ltd | Wholesale & retail | 2023 |
| Lucky Yuan Ltd | Extraterritorial | 2013 |