| Kalloz Limited | Transport & logistics | 2025 |
| Kallu Shop Ltd | Hospitality | 2023 |
| Kamex Solutions Ltd | Wholesale & retail | 2024 |
| Kamkof Logistics Ltd | Transport & logistics | 2021 |
| Kamp Real Estates Ltd | Real estate | 2024 |
| Kamran Naveed Limited | Manufacturing | 2022 |
| Kamrosh Ltd | Financial services | 2022 |
| Kamzah Ltd | Health & social care | 2016 |
| Kanan Inc Ltd | Professional & scientific | 2025 |
| Kanda Consultants Limited | Information & communication | 2023 |
| Kandriani Ltd | Wholesale & retail | 2017 |
| Kanea Contractors Ltd | Construction | 2017 |
| Kang & Daughters Properties Limited | Real estate | 2022 |
| Kang Stores Redditch Ltd | Wholesale & retail | 2015 |
| Kani Lounge Limited | Hospitality | 2023 |
| Kani Restaurant Limited | Hospitality | 2018 |
| Kanna Design Ltd | Construction | 2021 |
| Kannappar & Kasinathan Limited | Hospitality | 2015 |
| Kansagra Consulting Services Limited | Health & social care | 2013 |
| Kanson Corporation Limited | Wholesale & retail | 1998 |
| Kanson Services Limited | Financial services | 2004 |
| KAP Associates Limited | Information & communication | 2005 |
| KAP Energy Holdings Ltd | Professional & scientific | 2026 |
| Kap-Uniq Ltd | Wholesale & retail | 2020 |
| Kapsons Enterprises Limited | Professional & scientific | 2002 |
| KAR Cash Registers Limited | Wholesale & retail | 2012 |
| Karach Import Export Ltd | Wholesale & retail | 2016 |
| Karam Enterprise Ltd | Real estate | 2016 |
| Karaman Consultancy Limited | Professional & scientific | 2020 |
| Karamoko Lugal C&I Consultancy Ltd | Construction | 2025 |
| Karearea Limited | Information & communication | 2017 |
| Karen HRM Limited | Administrative & support | 2019 |
| Karibo International Technology Co., Ltd | Wholesale & retail | 2025 |
| Karim (U.K.) Limited | Wholesale & retail | 2003 |
| Karim Properties Limited | Real estate | 2003 |
| Karina Martus Ltd | Manufacturing | 2023 |
| Karine Properties Limited | Real estate | 2023 |
| Karmeks Limited | Transport & logistics | 2025 |
| Karnavar Culinary Consultancy Ltd | Hospitality | 2023 |
| Karnavar Limited | Health & social care | 2012 |
| Karpasi Food Imports Limited | Wholesale & retail | 2009 |
| Kartel Business Enterprise Ltd | Administrative & support | 2014 |
| Karwaze Limited | Transport & logistics | 2019 |
| KAS Property Ltd | Real estate | 2017 |
| Kash Accounting Ltd | Professional & scientific | 2014 |
| Kashas Croydon Ltd | Hospitality | 2025 |
| Kashmir Valley Coulsdon Limited | Hospitality | 1991 |
| Kashoutkicks Ltd | Wholesale & retail | 2025 |
| Kasinc Ltd | Real estate | 2015 |
| Kasish Ltd | Hospitality | 2022 |
| Kaspas Distribution Ltd | Wholesale & retail | 2014 |
| Kaspas Foundation Ltd | Health & social care | 2020 |
| Kaspas Franchise Limited | Other services | 2013 |
| Kaspas West Croydon Ltd | Hospitality | 2019 |
| Kasrawi Estates Ltd | Real estate | 2020 |
| Kassaterra Ltd | Hospitality | 2025 |
| Kasterlee UK Limited | Hospitality | 2006 |
| KAT Davies Studio Ltd | Professional & scientific | 2017 |
| Kath & Cath Limited | Wholesale & retail | 2015 |
| Katharo Cleaning Limited | Administrative & support | 2019 |
| Kathay Services Limited | Wholesale & retail | 2012 |
| Kathleen Groves Childminding Limited | Health & social care | 2025 |
| Katielou’S Nail Bar Ltd | Other services | 2024 |
| Kato Enterprises Limited | Wholesale & retail | 1996 |
| Kaur & Singh UK Limited | Real estate | 2026 |
| Kaurz Jewellery Ltd | Wholesale & retail | 2025 |
| Kausar Trader Ltd | Wholesale & retail | 2024 |
| Kavam Ltd | Professional & scientific | 2018 |
| Kavam Property Investments Ltd | Real estate | 2026 |
| Kavanagh Motor Services Limited | Financial services | 2015 |
| Kavandco Ltd | Administrative & support | 2019 |
| Kavideh Ltd | Hospitality | 2026 |
| Kavin DS Ltd | Wholesale & retail | 2005 |
| Kavoprop Ltd | Construction | 2025 |
| Kavt Property Ltd | Real estate | 2023 |
| Kay-Racompany Limited | Wholesale & retail | 2026 |
| Kayacan Limited | Hospitality | 2019 |
| Kaydeebee Services Limited | Administrative & support | 2015 |
| Kayi Medical Equipment Ltd | Administrative & support | 2018 |
| Kaysim Ltd | Construction | 2015 |
| Kay’S MAN With a Van Ltd | Transport & logistics | 2023 |
| KB Asset Limited | Real estate | 2021 |
| KB Autos Limited | Wholesale & retail | 2018 |
| KB Maintenance & Decorations Ltd | Construction | 2019 |
| KB Motor Engineers Limited | Wholesale & retail | 1999 |
| KB Property Management Services Limited | Real estate | 2025 |
| KB Real Estate Management Limited | Real estate | 2015 |
| KB Salt & Minerals Ltd | Wholesale & retail | 2018 |
| KB Taxi Ltd | Transport & logistics | 2025 |
| KB World Ltd | Real estate | 2015 |
| Kbdrone Limited | Construction | 2025 |
| Kbouras Limited | Health & social care | 2022 |
| KC Estates Management Ltd | Real estate | 2025 |
| KC Group Ltd | Construction | 2026 |
| KC Platinum Ltd | Real estate | 2016 |
| KCB Plumbing & Heating Ltd | Construction | 2019 |
| KCD Catering Limited | Hospitality | 2023 |
| KCI Developments Limited | Real estate | 2020 |
| KCL Tamil SOC Ltd | Administrative & support | 2025 |
| Kcwa Trust Ltd | Education | 2010 |