| Kameleon SO Ltd | Professional & scientific | 2020 |
| Kamesha Ltd | Information & communication | 2014 |
| Kams Investments Limited | Real estate | 2022 |
| Kana Service Limited | Construction | 2025 |
| Kanaan Medical Services Ltd | Health & social care | 2022 |
| Kanade Construct Ltd | Construction | 2019 |
| Kanika International Limited | Hospitality | 2023 |
| KAP Healthcare Limited | Health & social care | 2025 |
| Kapita Moore Limited | Construction | 2013 |
| Kappy Interior Designers Ltd | Manufacturing | 2024 |
| Kapur House Ltd | Real estate | 2021 |
| KAR (RD) Ltd | Professional & scientific | 2024 |
| Karan Brothers Ltd | Administrative & support | 2015 |
| Kardis Ltd | Other services | 2026 |
| Karia Advisory Ltd | Professional & scientific | 2024 |
| Karibu Ventures Limited | Financial services | 2019 |
| Karika Solutions UK Limited | Information & communication | 2019 |
| Karina Real Homes Ltd | Real estate | 2020 |
| Karismatic Beauty Ltd | Other services | 2022 |
| Karlco Ltd | Wholesale & retail | 2025 |
| Karth Technologies Limited | Information & communication | 2025 |
| Kasca Support Ltd | Health & social care | 2016 |
| Kashab Rental Property Limited | Real estate | 2018 |
| Kaslau Ltd | Construction | 2025 |
| Kasso Digital Consulting Ltd | Information & communication | 2026 |
| Katherine's Court (Ampthill) Limited | Households | 1977 |
| Katherines Garden Limited | Households | 1999 |
| Kattv Ltd | Construction | 2015 |
| Kavanagh Services Limited | Construction | 2019 |
| Kawsar Mirashy Contruction Ltd | Construction | 2024 |
| Kayako Properties Ltd | Real estate | 2025 |
| KAZALQ1 Ltd | Real estate | 2023 |
| Kazcon Limited | Construction | 2024 |
| KB Carpentry Services Ltd | Other services | 2021 |
| KB Customs Ltd | Wholesale & retail | 2026 |
| KB Investment Properties Ltd | Real estate | 2020 |
| KB Retail Limited | Wholesale & retail | 2024 |
| Kborg Limited | Other services | 2018 |
| KBP Tech Ltd | Information & communication | 2023 |
| KC Helping Hands Ltd | Transport & logistics | 2025 |
| KC Investments & Trading Limited | Wholesale & retail | 2025 |
| KD Wealth Management Ltd | Financial services | 2014 |
| KD Wills Limited | Professional & scientific | 2022 |
| Kd&I Services Ltd | Construction | 2011 |
| KDD Denford Limited | Real estate | 2022 |
| KDH Heating Ltd | Construction | 2014 |
| KDH Water Management Ltd | Construction | 2016 |
| Kdifa Ltd | Administrative & support | 2024 |
| KDL Medical Limited | Manufacturing | 2019 |
| KDP Fishries Ltd | Hospitality | 2021 |
| KDS Creations Ltd | Information & communication | 2018 |
| KDS Haulage Ltd | Construction | 2024 |
| KEA Ventures Limited | Information & communication | 2024 |
| Keane Aviation Ltd | Education | 2026 |
| Kedleston (Brookways School) Limited | Education | 2017 |
| Kedleston (Hatton Hill) Limited | Real estate | 2019 |
| Kedleston (High Peak School) Limited | Education | 2014 |
| Kedleston (Ivytree) Limited | Real estate | 2022 |
| Kedleston (Olsen House Holdings) Limited | Professional & scientific | 2009 |
| Kedleston (Olsen House) Limited | Education | 2009 |
| Kedleston (OS Education) Limited | Education | 1987 |
| Kedleston (Wings Education) Limited | Education | 2003 |
| Kedleston Group Limited | Professional & scientific | 2012 |
| Kedleston Group Properties 2 Limited | Real estate | 2024 |
| Kedleston Group Properties Limited | Real estate | 2021 |
| Kedleston Real Estate Limited | Real estate | 2006 |
| Kedleston Schools (London) Ltd | Education | 2008 |
| Kedleston Schools Limited | Education | 2006 |
| Kedleston Wings Holdco Ltd | Financial services | 2008 |
| Keen Security Ltd | Manufacturing | 2007 |
| Keen-Newport Global Limited | Manufacturing | 1967 |
| Keenshare Limited | Professional & scientific | 2006 |
| Keeping IT Real TV Limited | Information & communication | 2022 |
| Kelaca Ltd | Administrative & support | 2024 |
| Kellian Ventures Ltd | Wholesale & retail | 2023 |
| Kelly Works Ltd | Construction | 2024 |
| KEM ( Kalyan Electrical & Maintenance) Ltd | Manufacturing | 2024 |
| KEN Accounting Services Limited | Professional & scientific | 2014 |
| Kenfig Hill Limited | Wholesale & retail | 2018 |
| Kenilworth Court Management Company Limited | Households | 1981 |
| Kenley Management Company Ltd | Households | 2026 |
| Kennedy Harrison Hayes Ltd | Extraterritorial | 2023 |
| Kensington Hotel Services Limited | Hospitality | 2025 |
| Kent Ehfa Holdco Limited | Financial services | 2013 |
| Kent Ehfa Projectco Limited | Construction | 2013 |
| Kentish Paradise Limited | Real estate | 2025 |
| Keplin Group Limited | Wholesale & retail | 2018 |
| Keplin Holdings Ltd | Financial services | 2020 |
| Keplin Investments Limited | Real estate | 2020 |
| Keralitekitchens Ltd | Hospitality | 2025 |
| Kermotion UK Holdings Limited | Professional & scientific | 2010 |
| Kerr U.K. Limited | Manufacturing | 1973 |
| Keshav Pharm Ltd | Wholesale & retail | 2022 |
| Kesterpage Limited | Professional & scientific | 2020 |
| Kestrel Heights Management Company Limited | Real estate | 1988 |
| Key Address Ltd | Real estate | 2020 |
| Key for Change Limited | Health & social care | 2012 |
| Key-Line Building Services Ltd | Construction | 2020 |
| Keyapps Limited | Information & communication | 2011 |
| Keyhole Construction Limited | Construction | 2016 |