| LQ Audio Limited | Extraterritorial | 2017 |
| LQ Technologies (Wuxi) Ltd | Professional & scientific | 2013 |
| LR Fast Idea Ltd. | Extraterritorial | 2021 |
| LR Mullen Limited | Administrative & support | 2024 |
| LRK Plastic Co., Ltd | Extraterritorial | 2016 |
| Lssfe Ltd | Professional & scientific | 2026 |
| LT Surfaces Limited | Administrative & support | 2023 |
| LTI Testing&Certification Ltd | Information & communication | 2024 |
| Ltmoulds Trading Co., Ltd | Manufacturing | 2023 |
| Luan Xiang Trading Co., Limited | Extraterritorial | 2020 |
| Luca Bozkurt Limited | Other services | 2014 |
| Luca MIO Limited | Hospitality | 2022 |
| Luck Tree Limited | Manufacturing | 2024 |
| Luckshury Trade Limited | Administrative & support | 2023 |
| Lucky Baby Ltd | Wholesale & retail | 2025 |
| Lucky COW Quiz Company Ltd | Arts & recreation | 2024 |
| Lucky International Trade Co., Ltd. | Extraterritorial | 2016 |
| Lucky PAN Import and Export Co., Ltd | Wholesale & retail | 2023 |
| Lucky Star International Limited | Extraterritorial | 2015 |
| Lucky Star Shipping Limited | Transport & logistics | 2021 |
| Lucy Hobson Limited | Professional & scientific | 2023 |
| Lucyshannon Ltd | Professional & scientific | 2026 |
| Lugana Ltd | Hospitality | 2015 |
| LUK Yeung Technology & Trade Limited | Manufacturing | 2023 |
| Luke West Design Ltd | Professional & scientific | 2023 |
| Lulufa Trading Co., Ltd | Extraterritorial | 2021 |
| Lumico Solutions Limited | Extraterritorial | 2025 |
| Lumina Group Limited | Wholesale & retail | 2023 |
| Luminol Audio Ltd | Information & communication | 2016 |
| Luminous Future Limited | Hospitality | 2025 |
| Luna & Bloom Ltd | Wholesale & retail | 2020 |
| Lunaa Bearings Co., Ltd. | Extraterritorial | 2009 |
| Lunaandthemoon Ltd. | Manufacturing | 2014 |
| Lunar Lumen Ltd | Wholesale & retail | 2018 |
| Lunna Heerman Limited | Manufacturing | 2024 |
| Luobo Ltd | Information & communication | 2024 |
| Luomuni (Israel) Chemical Industry Group Ltd | Extraterritorial | 2022 |
| Lupa Local Limited | Real estate | 2017 |
| Lusa Building Management and Services Limited | Construction | 2014 |
| Lutra Contracting Limited | Construction | 2014 |
| Luxbub Ltd | Wholesale & retail | 2025 |
| Luxe London Cosmetics Limited | Extraterritorial | 2023 |
| Luxenest Ltd | Real estate | 2023 |
| Luxeto Manufacturing Limited | Extraterritorial | 2015 |
| Luximon Consulting Limited | Professional & scientific | 2022 |
| Luxor P&D Ltd | Construction | 2025 |
| Luxury Automotives Ltd | Wholesale & retail | 2025 |
| Luxury Brand Consulting UK Ltd | Wholesale & retail | 2024 |
| Luxury Bride House Ltd | Other services | 2025 |
| Luxury Cosmetic (London) Limited | Wholesale & retail | 2025 |
| LUXURY4U Ltd | Wholesale & retail | 2023 |
| Luxurybagclub Limited | Other services | 2022 |
| Lvnsh Ltd | Financial services | 2022 |
| Lyan Cosmetics Packing Solution Co., Ltd | Wholesale & retail | 2021 |
| Lyncscare Ltd | Health & social care | 2022 |
| Lynton Road Management Limited | Households | 2023 |
| Lynton Road Rentals Limited | Real estate | 2023 |
| Lynton Road SE1 Developments Limited | Construction | 2021 |
| Lyntop Limited | Extraterritorial | 2020 |
| Lynx Treasury Services Limited | Other services | 2002 |
| Lyric Hammersmith Productions Limited | Arts & recreation | 1983 |
| Lysi-Smarthome Ltd | Construction | 2026 |
| Lytian Trading Limited | Wholesale & retail | 2020 |
| LZ Materials Co., Ltd. | Manufacturing | 2021 |
| M & H Automotive Limited | Wholesale & retail | 1997 |
| M & H Property Lettings Ltd | Real estate | 2021 |
| M & J Carpentry and Joinery Limited | Manufacturing | 2009 |
| M & M Teams Ltd | Construction | 2021 |
| M Alldridge Limited | Professional & scientific | 2022 |
| M Bukauskiene Limited | Administrative & support | 2011 |
| M Global Logistics Ltd. | Extraterritorial | 2014 |
| M Griffin Ltd | Administrative & support | 2012 |
| M K Property (Beckenham) Ltd | Real estate | 2025 |
| M K Richardson Studio Ltd | Professional & scientific | 2017 |
| M K Surfacing Limited | Construction | 2025 |
| M R Grafix Limited | Professional & scientific | 2020 |
| M Ronan Consultancy Ltd | Professional & scientific | 2021 |
| M S Burke Limited | Professional & scientific | 2013 |
| M Sanders Consultancy Limited | Professional & scientific | 2025 |
| M&G (UK) Holding Limited | Professional & scientific | 2014 |
| M&M Grooming Ltd | Other services | 2020 |
| M&M Paper Limited | Administrative & support | 2012 |
| M&Tip (UK) Limited | Extraterritorial | 2020 |
| M. Gorman Ltd | Construction | 2005 |
| M.A.R Electric Media Ltd | Construction | 2018 |
| M.I.M. Music Ltd | Arts & recreation | 2021 |
| M.S Mobile Spa Treatments Limited | Other services | 2017 |
| M3S Trading Co., Ltd | Extraterritorial | 2018 |
| M8M Properties Ltd | Real estate | 2024 |
| MA OMA Limited | Wholesale & retail | 2022 |
| Maaan Ltd | Extraterritorial | 2023 |
| Maanshan Yingkai International Trading Co., Ltd | Wholesale & retail | 2020 |
| MAB Industries Limited | Manufacturing | 2026 |
| Macdev Services Limited | Construction | 2023 |
| Mach Asset Limited | Other services | 2026 |
| Macintyre Consultants Limited | Professional & scientific | 2013 |
| Mackenzie Management Limited | Households | 2025 |
| Macross Digital Technology Ltd | Information & communication | 2021 |
| Macure Home Industries Co., Ltd | Extraterritorial | 2019 |
| Macx Co., Limited | Manufacturing | 2022 |