| Kiwi Projects and Investments Ltd | Real estate | 2025 |
| Kiwi Property Holdings Ltd | Real estate | 2024 |
| Kizomba Moments Ltd | Arts & recreation | 2023 |
| KJ Electrical Ltd | Construction | 2026 |
| KJC Roofing Ltd | Construction | 2026 |
| KJK Construction Management Services Limited | Construction | 2024 |
| KJP Transport Ltd | Transport & logistics | 2025 |
| KJR Architectural Consultants Limited | Professional & scientific | 2009 |
| Kk's Consulting Ltd | Administrative & support | 2024 |
| Kkrb Associates Ltd | Information & communication | 2009 |
| Klassik Professional Services Ltd | Professional & scientific | 2025 |
| Klaw UK Limited | Wholesale & retail | 2016 |
| KLC Maintenance Ltd | Transport & logistics | 2022 |
| Kleanmaster Ltd | Transport & logistics | 2024 |
| Klezmer Kicks Limited | Information & communication | 2024 |
| Klik IT Limited | Information & communication | 1998 |
| Klipcorp IP Ltd | Information & communication | 2010 |
| Klipstar Studio Ltd | Other services | 2024 |
| Kliq Electrical Ltd | Construction | 2022 |
| Kloudz Consulting Ltd | Professional & scientific | 2023 |
| Kloudz Homes Ltd | Real estate | 2026 |
| KLS Stoves & Installations Limited | Wholesale & retail | 2011 |
| KLT Plumbing & Heating Limited | Construction | 2025 |
| KMA Together Limited | Hospitality | 2026 |
| KMC Electrical & Construction Limited | Construction | 2026 |
| Kmdmarketing Ltd | Wholesale & retail | 2025 |
| KMG Brickwork and Building Contractors LLP | | 2005 |
| KMK Enterprises Limited | Construction | 2007 |
| Kmmart Tech Ltd | Wholesale & retail | 2025 |
| KMN Engineering Ltd | Professional & scientific | 2014 |
| KMP Design and Build Ltd | Construction | 2025 |
| KMR Mortgages Ltd | Financial services | 2026 |
| KMS Courier Services Ltd | Transport & logistics | 2017 |
| KMS Super Store Ltd | Wholesale & retail | 2024 |
| KMS Tyres Limited | Wholesale & retail | 2018 |
| Knight Ares Ltd | Transport & logistics | 2015 |
| Knights Ladder Ltd | Real estate | 2022 |
| Knota Group Ltd | Wholesale & retail | 2024 |
| Knott Estates Limited | Real estate | 2024 |
| Knowles Leak Associates Limited | Professional & scientific | 2005 |
| KNS Consulting Ltd | Manufacturing | 2024 |
| KNS Ventures Limited | Other services | 2023 |
| KNT Europe Limited | Administrative & support | 2013 |
| Ko-Bolt International Ltd | Administrative & support | 2020 |
| Koasta Limited | Manufacturing | 2005 |
| Kodec Limited | Construction | 2013 |
| Kolblewin Limited | Information & communication | 2025 |
| Kolgai Ltd | Education | 2025 |
| Komasha Holdings Ltd | Other services | 2023 |
| Komasha Investments Ltd | Real estate | 2026 |
| Komo Beauty Ltd | Other services | 2019 |
| Konnagar Ltd. | Information & communication | 2012 |
| KOP Hill Classics Ltd | Wholesale & retail | 2018 |
| KOP Hill Climb Limited | Administrative & support | 2015 |
| Koprex Trading UK Ltd | Wholesale & retail | 2025 |
| Koral Foods Ltd | Extraterritorial | 2013 |
| Korotana Limited | Wholesale & retail | 2020 |
| Kosiu Ltd | Construction | 2013 |
| Kosmik Enterprises Limited | Professional & scientific | 2007 |
| Kothari Homes Ltd | Real estate | 2021 |
| Kothari Properties Ltd | Real estate | 2025 |
| KP & Sons Group Ltd | Other services | 2022 |
| KP & Sons Properties Limited | Real estate | 2025 |
| KP Prestige Construction Limited | Construction | 2017 |
| Kpix Ltd | Real estate | 2013 |
| KPJ Transport and Logistic Ltd | Transport & logistics | 2016 |
| Kprt Construction Limited | Construction | 2023 |
| KPW Ltd | Construction | 2007 |
| KR Direct Ltd | Wholesale & retail | 2022 |
| KR Teeth Ltd | Health & social care | 2018 |
| Krandl Properties Limited | Real estate | 2007 |
| KRB Associates Limited | Health & social care | 2018 |
| Kremesti Environmental Consulting Ltd | Professional & scientific | 2020 |
| Krestfield Estates Ltd | Real estate | 2022 |
| Kriscraft Home Solutions Ltd | Construction | 2026 |
| KRL Planning Limited | Professional & scientific | 2013 |
| Krofire Enterprises Limited | Information & communication | 2000 |
| KRT Services Limited | Professional & scientific | 2024 |
| KS Dhillon Constructions Ltd | Construction | 2025 |
| KS Sun Ltd | Wholesale & retail | 2024 |
| KSB Auto Ltd | Wholesale & retail | 2025 |
| KSB Equine Services Limited | Wholesale & retail | 2008 |
| KSE Electric Ltd | Construction | 2014 |
| KSH Homes Ltd | Real estate | 2021 |
| Ksim Property Services Ltd | Real estate | 2025 |
| KSM Construction Ltd | Construction | 2012 |
| KSS IT Solutions Ltd | Information & communication | 2011 |
| KTM Online Limited | Wholesale & retail | 2017 |
| Kubik Cafe Ltd | Hospitality | 2020 |
| Kubiq Adjusters Limited | Financial services | 2011 |
| Kumar Property Holdings UK Ltd | Real estate | 2024 |
| Kumo Consulting Limited | Information & communication | 2021 |
| Kuras Plumbing GAS and Electrical Ltd | Construction | 2015 |
| Kurunji Thottam Ltd | Agriculture & fishing | 2021 |
| KVD Consulting Ltd | Professional & scientific | 2022 |
| KVN Accountants & Business Services Ltd | Professional & scientific | 2020 |
| KW Beyond Chiropractic Ltd | Health & social care | 2026 |
| Kwells Investments Ltd | Real estate | 2020 |
| Kwest Holdings Ltd | Professional & scientific | 2023 |
| KWG Ventures Ltd | Professional & scientific | 2026 |