| Kearing Co Ltd | Wholesale & retail | 2025 |
| Kellko Ltd | Financial services | 2018 |
| KELVIN2U Limited | Professional & scientific | 2022 |
| Kenit Euro Co. Ltd | Wholesale & retail | 2011 |
| Kennedy Maintenance Ltd | Construction | 2022 |
| Kennedy-Svensson Ltd | Real estate | 2018 |
| Kensington Court Residents (IOW) Limited | Real estate | 2016 |
| Keoma Beauty Limited | Other services | 2018 |
| Kepco Service Ltd | Construction | 2012 |
| Kesac Holdings Ltd | Arts & recreation | 2026 |
| Kestrel Roofing Limited | Manufacturing | 2019 |
| Kev.In Consulting Ltd | Professional & scientific | 2018 |
| Keys Residential Holdings Limited | Financial services | 2001 |
| Keys Residential Limited | Real estate | 1974 |
| Keyxpro Ltd | Information & communication | 2024 |
| KFG Solutions Ltd | Professional & scientific | 2019 |
| KG Sports Group Ltd | Arts & recreation | 2022 |
| KGP Consultants Ltd | Administrative & support | 2013 |
| Khaldi Holdings Limited | Construction | 2025 |
| KHL Building Services Ltd | Construction | 2022 |
| Khlearn Ltd | Education | 2024 |
| Khoban Ltd | Transport & logistics | 2021 |
| Kiddiecorner (PVT) Ltd | Education | 2019 |
| Kiddo Kids | Other services | 2017 |
| Kildara Construction Ltd | Construction | 2013 |
| Kims Club Ltd | Financial services | 2025 |
| Kims Club Property Ltd | Real estate | 2025 |
| Kingdom Search Ltd | Administrative & support | 2026 |
| Kings Avenue House Ltd | Real estate | 2011 |
| Kings Fruit Ltd | Hospitality | 2025 |
| Kings View Court Limited | Real estate | 1989 |
| Kingston Brickwork Limited | Construction | 2007 |
| Kingston Chinese Association Limited | Other services | 2005 |
| Kingston Employment Services Limited | | 1988 |
| Kingston Environment Centre | Other services | 2012 |
| Kingston General Practice Chambers Limited | Health & social care | 2008 |
| Kingston Oak Tree Ltd | Education | 2020 |
| Kingston Sushi Ltd | Hospitality | 2024 |
| Kingston Topco Limited | Professional & scientific | 2013 |
| Kingston Tuition Centre Ltd | Education | 2003 |
| Kingston Waste Clearance Ltd | Water & waste | 2024 |
| Kingston Wellbeing Ltd | Education | 2018 |
| Kingsway Properties Freehold Ltd | Real estate | 2026 |
| Kingsway Tax Ltd | Professional & scientific | 2026 |
| Kiramathu Virunthu Limited | Hospitality | 2020 |
| Kishmo Cleaning Services Ltd | Administrative & support | 2025 |
| Kishmo Trading Ltd | Wholesale & retail | 2024 |
| Kitegesi Limited | Wholesale & retail | 2015 |
| KKJ Thiru Limited | Real estate | 2024 |
| Klajdi Construction Ltd | Construction | 2025 |
| Klam Developments Ltd | Real estate | 2018 |
| Klisman Construction Ltd | Construction | 2020 |
| KLP Design Ltd | Professional & scientific | 2015 |
| KMS31 Property Limited | Real estate | 2021 |
| KNB F&B Ltd | Hospitality | 2022 |
| KNB Trade Ltd | Hospitality | 2020 |
| Knyaz Cleaning Ltd | Administrative & support | 2023 |
| Knyaz Limited | Construction | 2015 |
| Knyaz Property Ltd | Construction | 2024 |
| Kocera Constructions Ltd | Construction | 2021 |
| Kokilanav Ltd | Wholesale & retail | 2026 |
| Komoandko Ltd | Wholesale & retail | 2025 |
| Konevych Football Development Centre Ltd | Education | 2025 |
| Konu KIM Tenor Ltd | Arts & recreation | 2023 |
| KOR Link Communication Ltd | Administrative & support | 2017 |
| Kor.Bbq Ltd | Hospitality | 2022 |
| Korea Foods Company Limited | Wholesale & retail | 1999 |
| Korea Town Foundation CIC | Professional & scientific | 2022 |
| Korean Culture and Arts UK CIC | Hospitality | 2020 |
| Korean Restaurants & Supermarkets Association CIC | Administrative & support | 2024 |
| Kotoni Ltd | Administrative & support | 2016 |
| Koyoo Trade Ltd | Wholesale & retail | 2013 |
| KPL Business Services Limited | Administrative & support | 2020 |
| Krameta Limited | Real estate | 2016 |
| Kreassive UK Limited | Wholesale & retail | 2014 |
| Kris Kirkham Photography Limited | Professional & scientific | 2015 |
| Krishnan Medical Ltd | Professional & scientific | 2014 |
| Kruger Renovations Ltd | Construction | 2022 |
| Ksks Coffee Ltd | Hospitality | 2025 |
| Ksrlproperty Ltd | Real estate | 2025 |
| KT Structures Ltd | Construction | 2018 |
| KT3 Shop Ltd | Wholesale & retail | 2024 |
| KTH Trading Ltd | Real estate | 2018 |
| Ktownnewmalden Limited | Hospitality | 2021 |
| Kucas Ltd | Professional & scientific | 2014 |
| Kumar Practise Limited | Health & social care | 2018 |
| Kumeran Properties Ltd | Real estate | 2020 |
| Kurd Fade Newmalden Ltd | Other services | 2025 |
| Kurtwood Properties Ltd | Real estate | 2021 |
| KW BMS Controls Ltd | Construction | 2025 |
| KW Letting Agents Limited | Real estate | 2021 |
| KW Letting and Sales Ltd | Real estate | 2025 |
| KW Sales and Lettings Limited | Real estate | 2012 |
| Kwons Tour Ltd | Administrative & support | 2022 |
| KX202201 Limited | Real estate | 2022 |
| KX202202 Limited | Real estate | 2022 |
| KY Accountancy Services Limited | Professional & scientific | 2014 |
| KY Consulting Services Ltd | Professional & scientific | 2016 |
| Kycg Europe Ltd | Administrative & support | 2021 |
| KYJ Development Ltd | Real estate | 2018 |