| Kuber Enterprise Ltd | Hospitality | 2025 |
| Kuber Trading Ltd | Professional & scientific | 2023 |
| Kuberra Limited | Professional & scientific | 2009 |
| Kufa Consulting (UK) Limited | Construction | 2002 |
| Kumar Global Trading Ltd | Financial services | 2026 |
| Kumar Import & Export Ltd | Wholesale & retail | 2026 |
| Kumar Properties Limited | Construction | 2026 |
| Kumar Property Investments Ltd | Real estate | 2019 |
| Kumar Stores Limited | Wholesale & retail | 2011 |
| Kumarzen Ltd | Wholesale & retail | 2023 |
| Kumar’S Ventures Ltd | Wholesale & retail | 2025 |
| KUN Seng Keng Dragon & Lion Dance UK Ltd | Arts & recreation | 2018 |
| Kunal Production Ltd | Information & communication | 2018 |
| Kundan LAL | Administrative & support | 2009 |
| Kunmera Investments Limited | Real estate | 2026 |
| Kushi Retail Ltd | Wholesale & retail | 2025 |
| Kutting Professionals Limited | Other services | 2021 |
| KV Chicken Ltd | Hospitality | 2022 |
| KV Property Management Services Ltd | Real estate | 2023 |
| KVK Services Ltd | Professional & scientific | 2018 |
| KVP Medicare Limited | Wholesale & retail | 2025 |
| KVP Renewable Energy Limited | Water & waste | 2025 |
| Kwencho Ltd | Wholesale & retail | 2026 |
| Kwikfasttech Limited | Wholesale & retail | 2025 |
| KWT Construction Limited | Construction | 2018 |
| KX Asset Management Ltd | Financial services | 2022 |
| KY24 Ltd | Wholesale & retail | 2025 |
| Kyrillous Ltd | Real estate | 2023 |
| Kyvex Supply Ltd | Wholesale & retail | 2026 |
| Köma Jewellery Ltd | Manufacturing | 2019 |
| L & a London Limited | Professional & scientific | 2024 |
| L D Building Services Ltd | Construction | 2023 |
| L K Investments Ltd | Real estate | 2016 |
| L K Portfolio Investments Ltd | Real estate | 2023 |
| L K Portfolio Ltd | Real estate | 2023 |
| L&A Ards Ltd | Real estate | 2021 |
| L&Co Security Ltd | Transport & logistics | 2012 |
| L&D Property Management Services Ltd | Real estate | 2022 |
| L&D&A Ltd | Construction | 2017 |
| L&P London Ltd | Wholesale & retail | 2020 |
| L.Bhundia Consultancy Limited | Administrative & support | 2026 |
| L.C Shop Limited | Wholesale & retail | 2023 |
| L.Helman Limited | Real estate | 1957 |
| L.L.E. Construction Ltd | Construction | 2025 |
| LA Bellavoire Atelier & Co Limited | Professional & scientific | 2026 |
| LA Crosta Sottile Ltd | Hospitality | 2023 |
| LA Mirna Design Studio Ltd | Professional & scientific | 2024 |
| LA Piovra Limited | Construction | 2015 |
| LA TUA Londra Cafe Ltd | Hospitality | 2026 |
| LA TUA Parigi Ltd | Administrative & support | 2026 |
| Laab Investments Limited | Professional & scientific | 2025 |
| Label Nation Limited | Wholesale & retail | 2019 |
| Labelle Stays Ltd | Hospitality | 2025 |
| Labh Holdings Limited | Real estate | 2025 |
| Labhu Acquisitions Limited | Real estate | 2024 |
| Labibaa Ltd | Wholesale & retail | 2016 |
| Labii Reatum Limited | Wholesale & retail | 2026 |
| Labocon Scientific Limited | Wholesale & retail | 2016 |
| Labodam Equipment Ltd | Wholesale & retail | 2020 |
| Lacerda Rentals Ltd | Wholesale & retail | 2024 |
| Lachin Technologies Ltd | Information & communication | 2023 |
| Laconsu Shan Ltd | Wholesale & retail | 2024 |
| Lacy Ltd | Wholesale & retail | 2026 |
| Laebra Ltd | Information & communication | 2024 |
| Lahori Masala Wembley Ltd | Hospitality | 2026 |
| Lahori Zaika Ltd | Hospitality | 2019 |
| Lahurey BSL Ltd | Real estate | 2024 |
| Lahurey Ltd | Water & waste | 2024 |
| Lakeland Physiotherapy Limited | Health & social care | 2016 |
| Lakha Jewellery Limited | Wholesale & retail | 2026 |
| Lakosh Technology Ltd | Wholesale & retail | 2018 |
| Laksha Enterprise Ltd | Wholesale & retail | 2024 |
| Lakshmi Wallis Limited | Hospitality | 2026 |
| Lakshmi Wings Limited | Hospitality | 2026 |
| Lala Parish Beauty Ltd | Wholesale & retail | 2025 |
| Lala Trans 17 Limited | Manufacturing | 2018 |
| Lancaster for Water & Wastewater Infrastructure Projects Ltd | Water & waste | 2020 |
| Lancelot Road Newsagents Ltd | Wholesale & retail | 2023 |
| Land of Chicken Ltd | Hospitality | 2022 |
| Land of Innovation Limited | Wholesale & retail | 2025 |
| Lander Studios Limited | Households | 2022 |
| Langdale House Management Limited | Real estate | 1996 |
| Langevan Services Ltd | Real estate | 2022 |
| Language Support Ltd | Professional & scientific | 2019 |
| Lantern Close Residents (Wembley) Limited | Households | 1970 |
| Lantern Lodge Limited | Real estate | 2017 |
| Lapinski Transport Limited | Transport & logistics | 2017 |
| Lapsicorp Ltd | Health & social care | 2023 |
| Laptech IT Services Limited | Wholesale & retail | 2024 |
| Laptop & PC Supplies Ltd | Wholesale & retail | 2024 |
| Laptop Parts Direct Limited | Wholesale & retail | 2019 |
| Larisa London Limited | Wholesale & retail | 2016 |
| Lashes by Amaani Ltd | Other services | 2022 |
| Lasmipprathaa Entertainment Ltd | Information & communication | 2017 |
| Lasta Limited | Real estate | 2025 |
| Laszlo Abseiling Company (L.A.C.) Ltd. | Construction | 2019 |
| Latgar Ltd | Transport & logistics | 2026 |
| Latimer Services Ltd | Construction | 2017 |
| Lats & Navs Properties Ltd | Real estate | 2020 |
| Laundrmate Ltd | Other services | 2025 |