| Kipwell Limited | Wholesale & retail | 2026 |
| Kiranmaye Lettings Limited | Real estate | 2023 |
| Kirsty Venghaus Transformational Coach Limited | Administrative & support | 2019 |
| Kirtech Engineering Management Limited | Professional & scientific | 2010 |
| KIT4TRIPS Ltd | Wholesale & retail | 2021 |
| Kitchen Site Services Ltd | Construction | 2016 |
| Kite Hill Farm (Wanborough) Management Company Limited | Real estate | 2001 |
| Kittytcg Ltd | Wholesale & retail | 2025 |
| Kiwix Limited | Transport & logistics | 2018 |
| KJ Limousines Ltd | Transport & logistics | 2019 |
| Kjcrozier Consultant Ltd | Health & social care | 2026 |
| KJD IT Solutions Limited | Information & communication | 2015 |
| KJH Services Limited | Administrative & support | 2022 |
| KJM Flooring Ltd | Construction | 2025 |
| KJM Transport Limited | Transport & logistics | 2016 |
| KK Art Group LLP | | 2024 |
| KK589 Ltd | Hospitality | 2025 |
| KKI Trading Ltd | Wholesale & retail | 2022 |
| Kkmpower Ltd | Transport & logistics | 2013 |
| KKR Brickwork Limited | Construction | 2017 |
| KL & JT Homes Ltd | Real estate | 2024 |
| KL Admin Solutions Limited | Administrative & support | 2024 |
| KL Driver Training Limited | Education | 2022 |
| Klaatu IT Security Limited | Information & communication | 2017 |
| Klarendon Ltd | Professional & scientific | 2023 |
| Klef Construction Ltd | Construction | 2021 |
| Klef Interiors Ltd | Construction | 2023 |
| KLM Takeaway Ltd | Hospitality | 2021 |
| Klma Promotions Ltd | Arts & recreation | 2022 |
| Klosters Limited | Wholesale & retail | 1990 |
| KM Global Consultancy Ltd | Professional & scientific | 2021 |
| KM Haulage & Recovery Ltd | Transport & logistics | 2026 |
| KM Rental Cars Limited | Administrative & support | 2026 |
| KMC MOT Ltd | Wholesale & retail | 2026 |
| Kmij Transport Ltd | Transport & logistics | 2025 |
| Kmita Twins Limited | Information & communication | 2023 |
| KMK Solutions Ltd | Information & communication | 2014 |
| Kmps Property Ltd | Construction | 2023 |
| KMS Plant Hire Limited | Other services | 2024 |
| Kmzdistro Limited | Wholesale & retail | 2025 |
| KN Flooring LLP | | 2024 |
| KN Property Group Ltd | Real estate | 2020 |
| KN688 Ltd | Hospitality | 2024 |
| Knabs Ridge Wind Farm Limited | Energy | 2005 |
| Knapp Renovations Ltd | Real estate | 2022 |
| Knbg Trans Ltd | Transport & logistics | 2021 |
| KNG Plus Limited | Information & communication | 2018 |
| Knightsbridge Construction PRC Ltd | Construction | 2009 |
| KNM Holdings Limited | Real estate | 2015 |
| Knott’S Property Services Ltd | Real estate | 2021 |
| Know More Ltd | Professional & scientific | 2021 |
| Knowledge Base Publications Limited | Information & communication | 1992 |
| KNS Swim School Limited | Education | 2019 |
| Knvre Doode Ltd | Wholesale & retail | 2025 |
| KO Moving Services Ltd | Transport & logistics | 2025 |
| Kobal Ventures Limited | Transport & logistics | 2024 |
| Koder Ltd | Information & communication | 2023 |
| Kodru Music Ltd | Wholesale & retail | 2023 |
| Koenig Film Consultancy Ltd. | Information & communication | 2017 |
| Kojis Antique Jewellery Limited | Wholesale & retail | 1992 |
| Kojis Limited | Wholesale & retail | 1997 |
| Kokoroko Limited | Hospitality | 2024 |
| Komos Transfers Travels & Cargo Limited | Transport & logistics | 2020 |
| Kompuzone Ltd | Information & communication | 2024 |
| Komteck Limited | Hospitality | 2023 |
| Komuso System Martial Arts Limited | Arts & recreation | 2014 |
| KON Limited | Real estate | 2020 |
| Konex Electrical Ltd | Construction | 2022 |
| Kong Kong Art Transport Co., Ltd | Transport & logistics | 2025 |
| Konnectapps Ltd | Information & communication | 2021 |
| Konqd Ltd | Transport & logistics | 2021 |
| Kontinium Ltd | Professional & scientific | 2026 |
| Kooltek Ltd | Manufacturing | 2023 |
| KOP-2076452 Ltd | Professional & scientific | 2019 |
| KOR Group Limited | Construction | 2025 |
| Kordian Ltd | Wholesale & retail | 2023 |
| Kotio Limited | Real estate | 2023 |
| Kovex Limited | Hospitality | 2017 |
| KP Components Limited | Wholesale & retail | 2016 |
| KP Payroll Ltd | Other services | 2018 |
| KP Shai Property Ltd | Real estate | 2023 |
| KPJ Electrical Services Limited | Construction | 2019 |
| KPM Change Solutions Limited | Professional & scientific | 2014 |
| KPP Group Limited | Real estate | 2023 |
| KPR IT Services Ltd | Information & communication | 2019 |
| KR Water Services Ltd | Construction | 2026 |
| Krafty BEE Ltd | Wholesale & retail | 2024 |
| Krafty Trade Ltd | Extraterritorial | 2019 |
| Kraken Grips Ltd | Information & communication | 2025 |
| Krawczyk Medical Assistance Ltd | Health & social care | 2025 |
| Kreative Interior Ltd | Construction | 2016 |
| Krhandymanservices Limited | Construction | 2026 |
| Krolak Entertainment Ltd | Arts & recreation | 2026 |
| Kroma International Limited | Manufacturing | 2002 |
| Krontec Design Limited | Professional & scientific | 2008 |
| KRS Merchants Ltd | Wholesale & retail | 2024 |
| KRS Retail Express Ltd | Wholesale & retail | 2026 |
| Krumbz Cafe Ltd | Administrative & support | 2021 |
| KSM Car Sales & Hire Ltd | Wholesale & retail | 2025 |
| Ksprop Ltd | Real estate | 2010 |