| Linriss Limited | Information & communication | 2015 |
| Lintel Services Limited | Administrative & support | 2016 |
| Linux Minds Limited | Information & communication | 2019 |
| Linwood Resource Limited | Construction | 2025 |
| Linx Consumer Finance Limited | Financial services | 2012 |
| Linxs Marketing Limited | Professional & scientific | 2016 |
| LIO Trance Ltd | Transport & logistics | 2020 |
| Lioden Ltd | Information & communication | 2015 |
| Lion Estates Lettings Limited | Real estate | 2025 |
| Lion Estates MK Ltd | Real estate | 2019 |
| Lion Estates Seta Limited | Real estate | 2025 |
| Lion Luxury Living Ltd | Real estate | 2023 |
| Lion Prestige Ltd | Real estate | 2025 |
| Lionel Etoo COMPUTER5 Limited | Wholesale & retail | 2025 |
| Lionhart Meeting Rooms Limited | Real estate | 2021 |
| Lionhart Mortgage Solutions Ltd | Financial services | 2019 |
| Lionkent Limited | Manufacturing | 1982 |
| Lionpath Group Limited | Construction | 2025 |
| Lions Europe Limited | Information & communication | 2007 |
| Lions Gate Auto Limited | Wholesale & retail | 2024 |
| Liora Creative Ltd | Information & communication | 2026 |
| Liquid Applied Roofing Systems Ltd | Construction | 2014 |
| Liquor Collective Enterprises Ltd | Hospitality | 2021 |
| Liric Accountants Limited | Professional & scientific | 2001 |
| Lisa Goddard Ltd | Professional & scientific | 2019 |
| Liscarroll Construction Limited | Other services | 2018 |
| Lishman-Weir Homes Limited | Households | 2022 |
| Liss Products Ltd | Wholesale & retail | 2024 |
| Lista (UK) Limited | Manufacturing | 1990 |
| Listen Limited | Administrative & support | 2008 |
| LIT Cube Ltd | Wholesale & retail | 2025 |
| LIT Solutions Ltd | Information & communication | 2020 |
| Litchurch Ltd | Professional & scientific | 2023 |
| Lite ZEN Ltd | Wholesale & retail | 2024 |
| Lite-Touch Consultants Limited | Professional & scientific | 2015 |
| Litefix Limited | Administrative & support | 2003 |
| Lithmare Ltd | Information & communication | 2022 |
| Litoro Ltd | Real estate | 2025 |
| Little & Many Limited | Real estate | 2021 |
| Little Aprons Ltd | Hospitality | 2026 |
| Little Beavers Daycare Limited | Health & social care | 2023 |
| Little Bumbles Childminders Ltd | Health & social care | 2025 |
| Little Dog Lodgings Ltd | Other services | 2019 |
| Little Eagles Limited | Education | 2025 |
| Little Earth MK Limited | Real estate | 2024 |
| Little Feet (Bedford) | Health & social care | 2015 |
| Little Gems Group Ltd | Hospitality | 2022 |
| Little Horwood Manor Management Limited | Households | 1982 |
| Little Kirin Kitchen Ltd | Hospitality | 2026 |
| Little Knox Limited | Wholesale & retail | 2011 |
| Little Meadows Limited | Real estate | 2021 |
| Little Miss Poppins Ltd | Administrative & support | 2026 |
| Little Orchard Productions Limited | Information & communication | 2008 |
| Little Rose Foundation C.I.C. | Other services | 2023 |
| Little Star Media Limited | Professional & scientific | 2006 |
| Little Star Media USA Limited | Professional & scientific | 2018 |
| Little Turtle Swim Company Bedford Limited | Arts & recreation | 2017 |
| Little Wing Investments Limited | Administrative & support | 2010 |
| Little World of Freedom Limited | Professional & scientific | 2025 |
| Littleport Properties Ltd | Construction | 2024 |
| Littler’S Autos Ltd | Wholesale & retail | 2024 |
| Littlesmith Consulting Limited | Professional & scientific | 2021 |
| Littlesweeties Childcare Ltd | Health & social care | 2024 |
| LIU JUN KJ Ltd. | Wholesale & retail | 2025 |
| Live for Lives Ltd | Real estate | 2024 |
| Liveaccess Limited | Administrative & support | 1996 |
| Livemead Limited | Households | 1994 |
| Livenviro Limited | Extraterritorial | 2014 |
| Liverpool and Wirral Property Solutions Limited | Real estate | 2018 |
| Liverpool Design Services Limited | Wholesale & retail | 2010 |
| Livewellbyliv Ltd | Health & social care | 2026 |
| Livewire Utilities Limited | Administrative & support | 2014 |
| Livingway Brand Limited | Real estate | 2020 |
| Livingway Group Limited | Financial services | 2019 |
| Livingway Holding Limited | Financial services | 2018 |
| Livingway Limited | Real estate | 2017 |
| Livingway Team Limited | Real estate | 2021 |
| Livingway Work Limited | Other services | 2025 |
| Livolve Limited | Construction | 2024 |
| LIW Advertising Limited | Information & communication | 2019 |
| Lizuri Ltd | Extraterritorial | 2022 |
| Lizzy's Kitchen Enterprise Limited | Hospitality | 2025 |
| Lizzytech Ltd | Wholesale & retail | 2024 |
| LJ HR Solutions Ltd | Administrative & support | 2026 |
| LJ Photography Limited | Other services | 2016 |
| LJ Procurement Limited | Other services | 2012 |
| LJ Properties 365 Ltd | Real estate | 2025 |
| LJC (Watford) Ltd | Construction | 2016 |
| LJD MK Ltd | Wholesale & retail | 2023 |
| LJM Electrical Contractors Ltd | Construction | 2020 |
| LJT Cooperation Ltd | Professional & scientific | 2026 |
| LK & F Services Ltd | Administrative & support | 2025 |
| LK OFF Licence Limited | Wholesale & retail | 2016 |
| LKP Services Ltd | Construction | 2024 |
| LKV Limited | Extraterritorial | 2021 |
| Llangollen Railway PLC | Transport & logistics | 1992 |
| Llcm Enterprises Ltd | Information & communication | 2025 |
| Llewellyn Properties Limited | Real estate | 2005 |
| Llins Global Ventures Limited | Administrative & support | 2017 |
| LLM B Properties Ltd | Real estate | 2024 |