| KSG Property Holdings Ltd | Real estate | 2024 |
| Ksinl Ltd | Construction | 2025 |
| KSJ Brothers Ltd | Real estate | 2016 |
| KSK Foods Limited | Manufacturing | 2014 |
| KSM Haulage Limited | Transport & logistics | 2022 |
| KSN Properties (Colindale) Ltd | Real estate | 2024 |
| KSN Properties (Coventry) Ltd | Real estate | 2024 |
| KST Lucky Group Limited | Wholesale & retail | 2021 |
| Kstrendz Ltd | Wholesale & retail | 2025 |
| KSV Estates Ltd | Real estate | 2025 |
| KU Investments Ltd | Real estate | 2013 |
| Kuber Coffee Cafe Ltd | Hospitality | 2024 |
| Kuchi Dress Ltd | Wholesale & retail | 2024 |
| Kuick FIX Autos Limited | Wholesale & retail | 2025 |
| KUK Limited | Real estate | 2025 |
| Kukran Enterprise Limited | Wholesale & retail | 1999 |
| Kulcha House Ltd | Hospitality | 2019 |
| Kulcha King Ltd | Hospitality | 2019 |
| Kuldeep Construction Ltd | Construction | 2020 |
| Kuldip Manak Memorial Organisation (UK) Ltd | Health & social care | 2011 |
| Kuldipsingh Builders Limited | Construction | 2014 |
| Kull & KUN Ltd | Wholesale & retail | 2025 |
| Kulmis Cars Limited | Administrative & support | 2022 |
| Kulveer Transport Ltd | Transport & logistics | 2018 |
| Kulwant Singh Ltd | Construction | 2025 |
| Kulwinder Singh Home Improvement Ltd | Construction | 2021 |
| Kulwinder SINGH4 Ltd | Construction | 2022 |
| Kulwinderjit Singh Ltd | Construction | 2018 |
| Kumar Kitchen & Furniture Limited Limited | Other services | 2025 |
| Kundanlal Raju Ltd | Construction | 2025 |
| Kuovi Tech Ltd | Wholesale & retail | 2026 |
| Kutchen Studio Ltd | Wholesale & retail | 2019 |
| Kutmasterz Ltd | Manufacturing | 2023 |
| KV Fish and Chips Ltd | Hospitality | 2024 |
| KV Money Exchange Ltd | Financial services | 2021 |
| Kwik Haulage & Skips Limited | Water & waste | 2015 |
| Kwikfix Locksmiths Ltd | Manufacturing | 2026 |
| KY Autos Limited | Wholesale & retail | 2015 |
| KY Property Solutions Limited | Real estate | 2024 |
| Kyce Ltd | Transport & logistics | 2018 |
| Kykp Ltd | Construction | 2025 |
| Kyovine Ltd | Information & communication | 2025 |
| L & M Cinema Ltd | Information & communication | 2026 |
| L & M Property Corporation Limited | Real estate | 2016 |
| L Singh Construction Limited | Construction | 2017 |
| L&A Supplements Ltd | Wholesale & retail | 2025 |
| L&H Estate Limited | Real estate | 2018 |
| L&K Brothers Limited | Wholesale & retail | 2024 |
| L&L Events London Ltd | Other services | 2020 |
| LA Bonita Ltd | Wholesale & retail | 2024 |
| LA Freshco Events Ltd | Hospitality | 2021 |
| LA Guarderia Spanish Nursery Limited | Health & social care | 2023 |
| Labour Asians Society Ltd | Health & social care | 2024 |
| Lacroix Ltd | Wholesale & retail | 2025 |
| Ladan Shop Ltd | Wholesale & retail | 2022 |
| Ladoo Ltd | Other services | 2023 |
| Lagrove Insurance Brokers Ltd | Financial services | 2000 |
| Lagrove Management Ltd | Professional & scientific | 2016 |
| Lahore Village Ltd | Hospitality | 2021 |
| Lahori Masala Southall Ltd | Hospitality | 2022 |
| Lahori Savour Ltd | Administrative & support | 2017 |
| LAK and Hanware Ltd | Construction | 2019 |
| Lakeland Business Development and Consultancy Ltd | Professional & scientific | 2015 |
| Lakhan Sweets and Savoury Ltd | Manufacturing | 2018 |
| Lakhi Multani Tailors Ltd | Other services | 2026 |
| Lakhwinder Singh Construction Ltd | Construction | 2020 |
| Lakshay Portfolio Ltd | Real estate | 2026 |
| Lalarukh Ltd | Wholesale & retail | 2015 |
| Lalka Builders & Contractors Ltd | Construction | 2026 |
| Lamba & Sons Limited | Wholesale & retail | 2014 |
| Lamba Trading Limited | Wholesale & retail | 2014 |
| Lampaka Ltd | Wholesale & retail | 2025 |
| Lampton 360 Limited | Professional & scientific | 2013 |
| Lampton Greenspace 360 Limited | Administrative & support | 2017 |
| Lampton Leisure Limited | Arts & recreation | 2020 |
| Lampton Recycle 360 Limited | Water & waste | 2016 |
| Lancing Food & Wine Ltd | Wholesale & retail | 2015 |
| Landery PVT Ltd | Real estate | 2023 |
| Landlords Property Services Ltd | Real estate | 2023 |
| Landmark Builders Limited | Other services | 2014 |
| Landmark Developers London Ltd | Real estate | 2020 |
| Landmark Steel Fabrications Ltd | Construction | 2023 |
| Langani & Lowgani LLP | | 2023 |
| Langdon Brooks Limited | Real estate | 2021 |
| Langley 23 Limited | Real estate | 2026 |
| Langley Crescent Limited | Real estate | 2026 |
| Lantern Arts Community Interest Company | Arts & recreation | 2025 |
| Larouge Beauty Salon Ltd | Other services | 2020 |
| Lascanel Ltd | Wholesale & retail | 2025 |
| Lascelles Park (2) Limited | Real estate | 2024 |
| Laser Van Rentals Ltd | Administrative & support | 2012 |
| LATCHMAN764 Ltd | Administrative & support | 2024 |
| Latent Research Ltd | Information & communication | 2026 |
| Latti Prime Chauffeurs Ltd | Administrative & support | 2026 |
| Laundra Moon Ltd | Other services | 2021 |
| Laurinus Limited | Wholesale & retail | 2019 |
| Lavandis Limited | Wholesale & retail | 2025 |
| Lavik Flower House Ltd | Wholesale & retail | 2025 |
| Lavish Kitchen & Bedroom Ltd | Manufacturing | 2024 |
| LAZ Solution Limited | Wholesale & retail | 2023 |