| Kanishk Impex Ltd | Wholesale & retail | 2021 |
| Kaoc Limited | Health & social care | 2021 |
| Kaos Trading Ltd | Wholesale & retail | 2025 |
| Kapland Properties Limited | Real estate | 2021 |
| Kapstick Properties Limited | Real estate | 2023 |
| KAR Enterprise Ltd | Transport & logistics | 2026 |
| Kara Technology Ltd | Information & communication | 2024 |
| Karabi UK Ltd | Other services | 2018 |
| KARACAYIR29 Ltd | Real estate | 2025 |
| Karachi Spicy Cuisine Ltd | Hospitality | 2022 |
| Karam Haulage Ltd | Transport & logistics | 2020 |
| Karamac Ltd | Construction | 2022 |
| Karamac Solar Limited | Construction | 2022 |
| Karas Care Ltd | Health & social care | 2023 |
| Karaskrib Limited | Other services | 2022 |
| Karbud Limited | Construction | 2016 |
| Karena Healthcare Limited | Health & social care | 2015 |
| Karim Halal Meat and Fish Limited | Manufacturing | 2023 |
| Karm Azzez & Co Ltd | Other services | 2019 |
| Karrie Associates Limited | Professional & scientific | 2019 |
| Kasa Building Services Ltd | Construction | 2018 |
| Kashif Builders Ltd | Construction | 2025 |
| Kasol Transport Ltd | Transport & logistics | 2018 |
| Kastanstory Home Care Services Limited | Hospitality | 2021 |
| Kastrati Contractors Ltd | Construction | 2012 |
| KAT London Properties Ltd | Real estate | 2022 |
| Katatumba Limited | Health & social care | 2012 |
| Kate Nkanta Consultancy Limited | Health & social care | 2019 |
| Kate Property Ltd | Real estate | 2023 |
| Katya DI Cleaning Ltd | Administrative & support | 2018 |
| Kaval Limited | Construction | 2025 |
| Kawani Cars Ltd | Wholesale & retail | 2026 |
| Kawther Limited | Education | 2022 |
| KAY 2020 Limited | Health & social care | 2009 |
| KAY Kleaning Company Ltd | Other services | 2022 |
| KAY Meadows Limited | Health & social care | 2026 |
| Kaya 2023 Ltd | Hospitality | 2023 |
| Kaya G Ltd | Construction | 2024 |
| KAYAK78 Limited | Transport & logistics | 2013 |
| Kayz Connect Limited | Information & communication | 2026 |
| KAZ Group Contractor Limited | Hospitality | 2016 |
| KAZ Group Ltd | Manufacturing | 2025 |
| KB Auto Traders Ltd | Wholesale & retail | 2026 |
| KB Logistics Group Limited | Transport & logistics | 2022 |
| KB School of Thought Limited | Education | 2021 |
| KBA Supplies Limited | Wholesale & retail | 2017 |
| Kbpn Rabari Ltd | Information & communication | 2026 |
| Kbrad Limited | Extraterritorial | 2014 |
| KC & GEO Drylining Ltd | Construction | 2018 |
| KC2 Builders UK Limited | Construction | 2024 |
| KCA Management Ltd | Professional & scientific | 2025 |
| KCA Properties Ltd | Real estate | 2022 |
| Kcmelectrical Services Ltd | Extraterritorial | 2020 |
| KCR Services Ltd | Administrative & support | 2023 |
| KCS Utilities & Groundworks Limited | Water & waste | 2020 |
| Ke&Ve Limited | Other services | 2014 |
| Kebabish Green Lane Ltd | Hospitality | 2009 |
| Kechkaycleaning Ltd | Administrative & support | 2026 |
| Kedad Properties Ltd | Real estate | 2022 |
| Kedad Services Ltd | Construction | 2015 |
| Keem Ventures Limited | Professional & scientific | 2016 |
| Keerthivas Limited | Wholesale & retail | 2023 |
| Kelly Dispatch Limited | Transport & logistics | 2024 |
| Kelnaida Limited | Health & social care | 2016 |
| Kenn Property Services Ltd | Construction | 2023 |
| Kennyg Ltd | Health & social care | 2016 |
| Kenya Diaspora Women Ministers CIC | Other services | 2026 |
| KEP Autos UK Ltd | Wholesale & retail | 2018 |
| Kerai Ltd | Financial services | 2020 |
| Kerr Eclectic Limited | Information & communication | 2019 |
| Kettles and Mettles Group Ltd | Water & waste | 2026 |
| Kevaz Property Investment Ltd | Real estate | 2025 |
| Kevin Cutz Ltd | Other services | 2024 |
| Kevin N Limited | Construction | 2015 |
| Kevose Limited | Construction | 2014 |
| Kev’S Professional Services Ltd. | Hospitality | 2016 |
| Key Equity Exchange & Knowledge Operations Ltd | Other services | 2025 |
| Key Fitters. Ltd | Construction | 2025 |
| Keylign Logistics Ltd | Transport & logistics | 2023 |
| Keylink Estates Ltd | Real estate | 2020 |
| Keyplots Limited | | 1985 |
| Keyplumb Ltd | Wholesale & retail | 2025 |
| Keystone & Young Ltd | Wholesale & retail | 2024 |
| KF Property Investment Ltd | Real estate | 2024 |
| KG Dagenham Ltd | Construction | 2019 |
| Kg-Trans Ltd | Transport & logistics | 2022 |
| KGH Services Ltd. | Real estate | 2013 |
| KGT London Ltd | Wholesale & retail | 2018 |
| KHA Logistics Ltd | Wholesale & retail | 2023 |
| Khalice Ltd | Health & social care | 2019 |
| Khalij Islamic (UK) Limited | Professional & scientific | 2021 |
| Khalij Trustees Limited | Professional & scientific | 2021 |
| Khalsa Car Gallery Limited | Wholesale & retail | 2025 |
| Khan Lodi Gold & Silver Limited | Wholesale & retail | 2025 |
| Khan Lodi Real Estate Limited | Real estate | 2025 |
| Khan PHV Ltd | Other services | 2025 |
| Khan Recovery Ltd | Transport & logistics | 2023 |
| Khan Sepehar Ehtesham Khan Lodi Limited | Professional & scientific | 2025 |
| Khan Trader and Services Limited | Wholesale & retail | 2026 |
| Khan's Real Estates Limited | Real estate | 2024 |