| Krishnathasan Ltd | Health & social care | 2023 |
| Krismarked Ltd | Information & communication | 2024 |
| Krisp & Kleen Ltd | Other services | 2012 |
| Krispy Bite Ltd | Hospitality | 2024 |
| Krispy Chicken Liverpool Ltd | Hospitality | 2026 |
| Kristaval Day Care Limited | Health & social care | 2012 |
| Kristo Ltd | Transport & logistics | 2020 |
| Kristy Cleaning Ltd | Administrative & support | 2025 |
| Kriushwin Properties Ltd | Real estate | 2020 |
| KRK Kirishika Convenience Store Ltd | Wholesale & retail | 2022 |
| KRL Management Limited | Professional & scientific | 2003 |
| KRN Corporate Events Ltd | Administrative & support | 2022 |
| KRN Events Limited | Hospitality | 2018 |
| Krol Corlett Construction Group Limited | Construction | 2023 |
| Krol Corlett Special Projects Limited | Construction | 2024 |
| Kronan Spirits UK Ltd | Wholesale & retail | 2026 |
| Kronanbuilders Ltd | Construction | 2024 |
| KRP Machinery Ltd | Wholesale & retail | 2025 |
| KRP Power Source (UK) Ltd. | Wholesale & retail | 1966 |
| KRS Express Ltd | Wholesale & retail | 2020 |
| KRT Properties Ltd | Real estate | 2017 |
| KRT Property Management Ltd | Real estate | 2025 |
| Kruger Tissue (Consumer) Limited | Extraterritorial | 1984 |
| Kruger Tissue (Industrial) Limited | Extraterritorial | 1968 |
| Kruger Tissue Group (UK) Limited | Extraterritorial | 1994 |
| Krukid Figaz Ltd | Professional & scientific | 2018 |
| Kruxial AI Ltd | Information & communication | 2025 |
| Kryss.Uk Ltd | Transport & logistics | 2015 |
| Krystal CSG UK Ltd | Administrative & support | 2020 |
| Krystal Financial Solutions Ltd | Financial services | 2013 |
| Krystallos Ltd | Financial services | 2022 |
| KS Contractors (NW) Ltd | Construction | 2025 |
| KS Handy & Maintenance Ltd | Construction | 2025 |
| KS Medical Psychotherapy Services Ltd | Health & social care | 2025 |
| KS Quantity Surveyors Limited | Professional & scientific | 2020 |
| KS Services (NW) LP | | 2021 |
| KS Tour Media Limited | Professional & scientific | 2024 |
| Ks&A Ltd | Transport & logistics | 2025 |
| KS1 Holding Ltd | Financial services | 2022 |
| KS1 Rentals Ltd | Real estate | 2022 |
| KS3 Investments Limited | Real estate | 2022 |
| KS3 Tech Limited | Information & communication | 2013 |
| Ksac Holdings Ltd | Real estate | 2017 |
| KSF Counselling Ltd | Health & social care | 2013 |
| KSG Rail & Construction Limited | Construction | 2023 |
| KSI Commercials Ltd | Wholesale & retail | 2026 |
| KSL Brickwork Contractors Ltd | Construction | 2007 |
| Kssk Motors Limited | Wholesale & retail | 2025 |
| KS’ Live Euro Ltd | Administrative & support | 2018 |
| KT Electrical Services Ltd | Construction | 2020 |
| KT Improvements Ltd | Construction | 2023 |
| Ktams Food Limited | Hospitality | 2024 |
| KTC Electrical Services Ltd | Construction | 2021 |
| KTJ Associates Ltd | Extraterritorial | 2019 |
| KTK Residential Ltd | Real estate | 2024 |
| KTM Systems Limited | Professional & scientific | 2012 |
| Kttpc Ltd | Arts & recreation | 2026 |
| Ktzms Properties Ltd | Real estate | 2026 |
| Kuarvo Maya Ltd | Real estate | 2025 |
| Kuavo Ltd | Real estate | 2017 |
| Kuavo Property Services Ltd | Real estate | 2018 |
| Kube Management Consultants Ltd | Professional & scientific | 2018 |
| Kubechinte Services Limited | Other services | 2014 |
| Kubersiddhi Limited | Professional & scientific | 2025 |
| Kudos 07 Ltd | Real estate | 2021 |
| Kudos MN Ltd | Other services | 2018 |
| Kuir Dreamstay Ltd | Hospitality | 2025 |
| Kujawiak Mini Market Ltd | Wholesale & retail | 2025 |
| Kukka Ltd | Wholesale & retail | 2025 |
| Kukuruku Transport Ltd | Transport & logistics | 2022 |
| Kula Studio Ltd | Professional & scientific | 2025 |
| Kulture Records Ltd | Arts & recreation | 2023 |
| Kuma Football Limited | Arts & recreation | 2025 |
| Kumalu Ltd | Administrative & support | 2014 |
| Kumarai Virava Murthi Namaha Ltd | Wholesale & retail | 2022 |
| Kunadian Cardiology Ltd | Health & social care | 2021 |
| Kunal Capital Limited | Real estate | 2026 |
| Kunal Mandalia Limited | Information & communication | 2018 |
| Kunal Mandalia Property Ltd | Real estate | 2023 |
| Kung Developments Ltd | Real estate | 2021 |
| Kung Luxury Estates Ltd | Real estate | 2022 |
| Kung Peverell Estates Ltd | Real estate | 2024 |
| Kung Properties Ltd | Real estate | 2018 |
| Kung Property Group Ltd | Financial services | 2021 |
| Kunham Painter and Engineer Ltd | Construction | 2020 |
| Kunji Ltd | Hospitality | 2020 |
| Kuppd Ltd | Manufacturing | 2022 |
| Kurd Barberz Ltd | Other services | 2024 |
| Kurd Construction General Ltd | Manufacturing | 2025 |
| Kurd Food Ltd | Hospitality | 2025 |
| Kurdina Holdings Ltd | Professional & scientific | 2018 |
| Kurdina Properties Limited | Construction | 2022 |
| Kurdina Restaurants Ltd | Hospitality | 2017 |
| Kurdistan Cafe (NW) Ltd | Hospitality | 2025 |
| Kurdo Barber 77 Ltd | Other services | 2025 |
| Kurdo Barber Ltd | Other services | 2023 |
| KURIAN96 Limited | Construction | 2025 |
| Kush Community CIC | Education | 2023 |
| Kuta Thania Ltd | Hospitality | 2019 |
| Kuttingco Limited | Other services | 2024 |