| Kintu Fashion Limited | Wholesale & retail | 2020 |
| Kirshamay Limited | Real estate | 2020 |
| Kissing Frog Ltd | Administrative & support | 2022 |
| Kivelin Limited | Construction | 2016 |
| Kivelin Properties Ltd | Real estate | 2024 |
| KJP Business Consulting Limited | Professional & scientific | 2018 |
| KJP UK Limited | Professional & scientific | 2008 |
| KK Infotech Ltd | Information & communication | 2011 |
| KKU Design Ltd | Professional & scientific | 2024 |
| KL Maintenance Ltd | Construction | 2022 |
| KLP Enterprise Ltd | Other services | 2024 |
| Klsv Investments Ltd | Real estate | 2022 |
| Kman Cafe Ltd | Hospitality | 2021 |
| KMM Property Limited | Real estate | 2023 |
| KN & Aren Associates Ltd | Professional & scientific | 2022 |
| Knifton Court Limited | Hospitality | 1993 |
| Knight Group (Europe) Limited | Manufacturing | 2012 |
| Knight Group (International) Limited | Manufacturing | 2014 |
| Knight Group (UK) Limited | Manufacturing | 2012 |
| Knight Group Limited | Financial services | 2018 |
| Knight Portfolio 2 Ltd | Real estate | 2020 |
| Knight Portfolio 3 Ltd | Real estate | 2021 |
| Knight Portfolio Ltd | Real estate | 2018 |
| Knight Precision Metals Limited | Manufacturing | 2012 |
| Knight Precision Wire Limited | Manufacturing | 2002 |
| Knml Properties Ltd | Real estate | 2020 |
| Knubisoft Global Ltd | Information & communication | 2018 |
| Knuway House Property Management Ltd | Real estate | 2011 |
| Koala Sleepovers and Events Ltd | Other services | 2022 |
| Kobek Consulting Ltd | Professional & scientific | 2012 |
| Kohak Limited | Health & social care | 2023 |
| Kombucha Warehouse Ltd | Manufacturing | 2021 |
| Konnect Holdings Limited | Financial services | 2021 |
| Konnect Services Limited | Construction | 2007 |
| Kontacto Limited | Administrative & support | 2014 |
| Kontominasfotis Ltd | Manufacturing | 2021 |
| Kood International Limited | Professional & scientific | 1997 |
| Kooples Properties Ltd | Hospitality | 2013 |
| Kooto Ltd | Other services | 2006 |
| Kosamu TM Ltd | Construction | 2024 |
| Kotto Ceramica Limited | Wholesale & retail | 2026 |
| Kovale Limited | Hospitality | 2016 |
| Kozmik Work Space Ltd | Other services | 2013 |
| KPG Nelson Limited | Real estate | 2018 |
| KPW Group Limited | Manufacturing | 2016 |
| Kratos Corporation Limited | Other services | 2013 |
| Kreshniku Transport Ltd | Other services | 2023 |
| Krinnachem Ltd | Other services | 2022 |
| Krish Ventures Limited | Real estate | 2012 |
| Kristen Filice Consulting Ltd | Other services | 2024 |
| KRJ Business Consultancy and Coaching Limited | Other services | 2025 |
| KRJ Trading Ltd | Hospitality | 2021 |
| KS MAY Cleaning Ltd | Professional & scientific | 2005 |
| KTA Sport and Leisure Limited | Arts & recreation | 2010 |
| Kutchenhaus Potters Bar Ltd | Professional & scientific | 2022 |
| Kvik Limited | Health & social care | 2011 |
| KW Operations Ltd | Administrative & support | 2026 |
| Kylie Skin Clinic Ltd | Other services | 2023 |
| L & B M Services Ltd | Other services | 2020 |
| L G M Services (London) Limited | Construction | 2014 |
| L Hamilton Roofing and Build Ltd | Construction | 2025 |
| L T M Investments Limited | Real estate | 2008 |
| L&A Chiswick Limited | Real estate | 2019 |
| L&I Aesthetics Ltd | Health & social care | 2024 |
| L&S Construction and Utilities Limited | Construction | 2022 |
| L&X Builders Ltd | Construction | 2014 |
| L.A. Cleaning Limited | Other services | 1995 |
| L.J.P. Scaffolding Ltd | Construction | 2019 |
| LA Cresta Ltd | Construction | 2024 |
| LA Nostra Italia Ltd | Hospitality | 2019 |
| LA Vina Tapas Bar Ltd | Hospitality | 2005 |
| Label Loft London Ltd | Wholesale & retail | 2020 |
| Laberna Ltd | Administrative & support | 2007 |
| Ladbroke Grove House Limited | Households | 1990 |
| Land & Co Properties Ltd | Real estate | 2025 |
| Land & Property Navigation Yard Limited | Construction | 1948 |
| Land Invest 1 Limited | Real estate | 2026 |
| Land Invest 10 Limited | Construction | 2026 |
| Land Invest 11 Limited | Construction | 2026 |
| Land Invest 12 Limited | Construction | 2026 |
| Land Invest 13 Limited | Construction | 2026 |
| Land Invest 14 Limited | Construction | 2026 |
| Land Invest 15 Limited | Construction | 2026 |
| Land Invest 16 Limited | Construction | 2026 |
| Land Invest 17 Limited | Construction | 2026 |
| Land Invest 18 Limited | Construction | 2026 |
| Land Invest 19 Limited | Construction | 2026 |
| Land Invest 2 Limited | Construction | 2026 |
| Land Invest 20 Limited | Construction | 2026 |
| Land Invest 21 Limited | Construction | 2026 |
| Land Invest 23 Limited | Construction | 2026 |
| Land Invest 24 Limited | Construction | 2026 |
| Land Invest 25 Limited | Construction | 2026 |
| Land Invest 26 Limited | Construction | 2026 |
| Land Invest 27 Limited | Construction | 2026 |
| Land Invest 28 Limited | Construction | 2026 |
| Land Invest 29 Limited | Construction | 2026 |
| Land Invest 3 Limited | Construction | 2026 |
| Land Invest 30 Limited | Construction | 2026 |
| Land Invest 4 Limited | Construction | 2026 |