| Keystep Properties Ltd | Real estate | 2023 |
| Keystep Property Management Limited | Real estate | 2022 |
| Keystone Builders Group Ltd | Manufacturing | 2026 |
| Keystone Business Partnerships Limited | Professional & scientific | 2011 |
| Keystone Care Group (U.K.) Ltd | Health & social care | 2023 |
| Keystone Software Technology Services Ltd | Information & communication | 2017 |
| Keystone Sterling Accounts & Tax Ltd | Professional & scientific | 2026 |
| Keytec Geomembranes Limited | Manufacturing | 2001 |
| Keytec Installation Services Limited | Financial services | 2011 |
| Keytronics Ltd | Wholesale & retail | 2025 |
| Keyvan Export Ltd | Wholesale & retail | 2025 |
| Keyway Trading Ltd | Wholesale & retail | 2025 |
| Kezo Property Ltd | Real estate | 2024 |
| KF Decoration Limited | Construction | 2025 |
| KF Estates Limited | Real estate | 2024 |
| KF Kamfilming Production Ltd | Professional & scientific | 2020 |
| KFC Services (Bradford) Limited | Manufacturing | 2003 |
| KFD - People Engagement Limited | Professional & scientific | 2019 |
| KG Contracting Building Services Ltd | Construction | 2021 |
| KG Drivers Ltd | Transport & logistics | 2026 |
| KG Investment Properties Limited | Real estate | 2025 |
| KG Kriya Consulting Ltd | Information & communication | 2015 |
| KG Oikos Limited | Real estate | 2023 |
| KGA Holdings Limited | Financial services | 2022 |
| KGB Fashions Limited | Wholesale & retail | 2009 |
| KGD Consultancy Ltd | Information & communication | 2010 |
| KGG Developments Limited | Construction | 2014 |
| KGI Fire Limited | Professional & scientific | 2014 |
| KGS Recruitment Services Ltd | Administrative & support | 2013 |
| KH Landmarks Ltd | Real estate | 2025 |
| KH Landsdown Investments | Financial services | 2024 |
| KH Local Hospitality Ltd | Hospitality | 2025 |
| KH Plumbing Ltd | Construction | 2025 |
| KH Properties Investment Limited | Real estate | 2010 |
| KH Resourcing Limited | Administrative & support | 2013 |
| KH Skylark Investments | Financial services | 2024 |
| KH Training Limited | Administrative & support | 2018 |
| Khabra Property Solutions Limited | Real estate | 2016 |
| Khadem Ltd | Hospitality | 2025 |
| Khadija Healthcare Resources Limited | Administrative & support | 2025 |
| Khalbros (Saxton Lane) Limited | Financial services | 2020 |
| Khalbros Eastgate Holdco Limited | Financial services | 2025 |
| Khalbros JV (Park ROW) Limited | Real estate | 2025 |
| Khalbros Management Ltd | Real estate | 2017 |
| Khalbros Office Ltd | Real estate | 2010 |
| Khalsmith (Portfolio) Limited | Real estate | 2010 |
| Khalsmith Investments Limited | Financial services | 2014 |
| Khalsmith Limited | Real estate | 2004 |
| Kham T & L Limited | Wholesale & retail | 2025 |
| Khamis Healthcare Limited | Health & social care | 2023 |
| Khan & Co. Leeds Limited | Transport & logistics | 2014 |
| Khan Business Services Ltd | Professional & scientific | 2020 |
| Khan Health Ltd | Health & social care | 2014 |
| Khan Management Service's Limited | Professional & scientific | 2014 |
| Khan Pharma (Leeds) Limited | Wholesale & retail | 2018 |
| Khan Sultan Limited | Wholesale & retail | 2022 |
| Khans Jutt Limited | Hospitality | 2025 |
| Khans' Shipping and Logistics Ltd | Transport & logistics | 2024 |
| Khanzaiq Ltd | Transport & logistics | 2025 |
| Khan’S Group Ltd | Wholesale & retail | 2025 |
| Khaos Technology Limited | Professional & scientific | 2008 |
| Khaparia Limited | Professional & scientific | 2021 |
| Kharazm Ltd | Construction | 2022 |
| Khawaja Ltd | Professional & scientific | 2022 |
| Khawar Brothers Limited | Wholesale & retail | 2025 |
| Khego Ltd | Wholesale & retail | 2017 |
| Khela (UK) Limited | Real estate | 2004 |
| Khela Limited | Real estate | 2013 |
| Khells Estates Ltd | Real estate | 2025 |
| Khells Ltd | Financial services | 2023 |
| Khells Projects Ltd | Construction | 2026 |
| Khera Consultants Limited | Professional & scientific | 2000 |
| Kherafa Limited | Construction | 2020 |
| Kheshig Expeditions Ltd | Administrative & support | 2025 |
| Khlaxon Ltd | Wholesale & retail | 2021 |
| KHO Care Limited | Health & social care | 2018 |
| Khodadadi Group Limited | Real estate | 2024 |
| Khogianis Global Services Limited | Manufacturing | 2023 |
| Khosa & Krolik Capital Limited | Administrative & support | 2025 |
| Khrti Services Limited | Professional & scientific | 2018 |
| Khruathai Limited | Hospitality | 2016 |
| Khsh Holdings Ltd | Information & communication | 2025 |
| Khupe Legal Services Ltd | Professional & scientific | 2015 |
| Khwaja Holdings Ltd | Financial services | 2025 |
| Khyamtraders Ltd | Wholesale & retail | 2025 |
| KHZ Foods Ltd | Hospitality | 2019 |
| KI Hana Limited | Information & communication | 2024 |
| Ki-Tone Ltd | Education | 2017 |
| Kian & Anah's Ltd | Hospitality | 2025 |
| Kiatrade Ltd | Wholesale & retail | 2018 |
| Kibard Ltd. | Manufacturing | 2023 |
| Kibs Housing Ltd | Real estate | 2024 |
| Kibs Pain Solutions Limited | Health & social care | 2010 |
| Kicho Properties Ltd | Real estate | 2025 |
| Kickin Chicken Limited | Hospitality | 2026 |
| Kicking for Grassroots CIC | Arts & recreation | 2018 |
| Kickstart Skills Ltd | Arts & recreation | 2019 |
| Kiddi Galore Limited | Education | 2007 |
| Kiddies World Limited | Wholesale & retail | 2003 |
| Kidiera Ltd | Transport & logistics | 2022 |