| Kolkop Ltd | Construction | 2019 |
| Komm Limited | Professional & scientific | 2017 |
| Komonika Ltd | Construction | 2022 |
| Konark Darshan Buildtech Ltd | Information & communication | 2024 |
| Konds Ltd | Administrative & support | 2016 |
| Konnekt Business Services Ltd | Financial services | 2015 |
| Konnully Properties Ltd | Real estate | 2023 |
| Kormel Investments Limited | Real estate | 2024 |
| Kosodotech Company Limited | Construction | 2019 |
| Kotunwa Services Limited | Wholesale & retail | 2025 |
| KP Cleaners Ltd | Administrative & support | 2015 |
| Kprsfoods Limited | Hospitality | 2023 |
| Kqpp Ltd | Wholesale & retail | 2025 |
| KR Asset Management Ltd | Real estate | 2025 |
| KR Elite FIN Ltd | Wholesale & retail | 2026 |
| KR Property Management Ltd | Real estate | 2024 |
| KR Wholesale Ltd | Wholesale & retail | 2025 |
| Kraphie Group Limited | Professional & scientific | 2025 |
| Krasimir Delchev Ltd | Transport & logistics | 2020 |
| Krikos.Tm Ltd | Transport & logistics | 2021 |
| Kriola DI Força CIC | Education | 2025 |
| Kriplytics Ltd | Information & communication | 2025 |
| Krispychris Ltd | Other services | 2022 |
| Kristis&Co Ltd | Transport & logistics | 2018 |
| KRO Design Ltd | Construction | 2021 |
| Kroshery Ltd | Wholesale & retail | 2025 |
| Krown Consults Ltd | Information & communication | 2015 |
| Kruche Ltd | Wholesale & retail | 2026 |
| Krypton Consulting Ltd | Professional & scientific | 2002 |
| Krypton Development Limited | Real estate | 2019 |
| Krypton Luminous | Professional & scientific | 2021 |
| Krystal Klear Glass Care Ltd | Administrative & support | 2024 |
| KS Business Management Limited | Professional & scientific | 2019 |
| KS Grande Ltd | Construction | 2026 |
| Ksc&Sons Ltd | Transport & logistics | 2021 |
| Ksquared Consultants Limited | Professional & scientific | 2023 |
| KSR London Ltd | Hospitality | 2021 |
| KSS Fibre Limited | Information & communication | 2025 |
| Kssm Ltd | Wholesale & retail | 2025 |
| KST Automobiles Limited | Wholesale & retail | 2022 |
| Kt&Sons Ltd | Wholesale & retail | 2023 |
| KTC Barking Ltd | Hospitality | 2023 |
| KTC Fresh Nann Ltd | Wholesale & retail | 2024 |
| Ktfs Ltd | Financial services | 2024 |
| KTK London Ltd | Wholesale & retail | 2019 |
| Ktree Operations Limited | Manufacturing | 2019 |
| Kubber Health Care Limited | Health & social care | 2025 |
| Kudoscope Ltd | Information & communication | 2019 |
| KUF Services Ltd | Transport & logistics | 2019 |
| Kuhar Project Ltd | Construction | 2024 |
| Kukisa Ltd | Construction | 2022 |
| Kunshi Services UK Ltd | Administrative & support | 2014 |
| Kurda Properties Ltd | Real estate | 2024 |
| Kwamenbo Ltd | Transport & logistics | 2021 |
| KY Group Limited | Real estate | 2020 |
| KY9 Services Limited | Administrative & support | 2020 |
| Kyaltov Ltd | Construction | 2018 |
| KYR Construction Ltd | Construction | 2022 |
| Kyros Ltd | Other services | 2013 |
| KZ MIR Ltd | Wholesale & retail | 2026 |
| L & G Installations Ltd | Construction | 2008 |
| L a Motors Ltd | Manufacturing | 2006 |
| L&A Star House Limited | Construction | 2020 |
| L&G Investment Group Ltd | Real estate | 2025 |
| L&H Mart Limited | Wholesale & retail | 2025 |
| L&Z Building Ltd | Construction | 2021 |
| L'El-Roi Global Ltd | Information & communication | 2025 |
| L. Rochelle Ltd | Wholesale & retail | 2016 |
| L.I.T Property Limited | Real estate | 2023 |
| L2PASS School of Motoring Limited | Education | 2011 |
| LA & Sons Enterprise Ltd | Information & communication | 2024 |
| LA Cuaba Ltd | Real estate | 2026 |
| LA Kaza Property Limited | Households | 2024 |
| LA Macchina Ltd | Wholesale & retail | 2025 |
| LA Motoring Limited | Wholesale & retail | 2019 |
| LA Rose Finance Ltd | Financial services | 2024 |
| LA Traditii Ltd | Transport & logistics | 2023 |
| Laala Living Ltd | Wholesale & retail | 2023 |
| Ladi Painting & Decorating Ltd | Construction | 2024 |
| Ladyb (UK) Limited | Administrative & support | 2016 |
| Ladyb Health Care Recruitment Agency's Ltd | Administrative & support | 2020 |
| Laiorga Ltd | Transport & logistics | 2023 |
| LAJ Careberry Limited | Health & social care | 2021 |
| Lakavath Trading Limited | Wholesale & retail | 2025 |
| Lakeshore Group Limited | Real estate | 2019 |
| Lakson Cleaning Services Limited | Administrative & support | 2018 |
| LAL Consultancy Ltd | Professional & scientific | 2025 |
| Lama Metals Ltd | Manufacturing | 2020 |
| Lambov ALL Construction Ltd | Construction | 2020 |
| Land & Building Solutions Limited | Real estate | 2014 |
| Landmark Letts Ltd | Real estate | 2024 |
| Landvue Group Ltd | Information & communication | 2015 |
| Landvue Limited | Construction | 2024 |
| Lane PS Ltd | Real estate | 2004 |
| Lansdowne Property Works Ltd | Construction | 2025 |
| Lansdowne SPV1 Holdings Limited | Real estate | 2018 |
| Lantech Services Limited | Professional & scientific | 2003 |
| Laredos Catering and Confectionery Limited | Hospitality | 2017 |
| Laredos Homes Limited | Real estate | 2026 |
| Lareine Services Ltd | Health & social care | 2026 |