| Kairos Intl Ltd | Wholesale & retail | 2026 |
| Kairos Partners UK Limited | Information & communication | 2022 |
| Kaizen Developers Ltd | Real estate | 2025 |
| Kaizen Global Limited | Health & social care | 2017 |
| Kaizen Interim Recruitment Ltd | Administrative & support | 2017 |
| Kaizen Investment Group Ltd | Real estate | 2019 |
| Kaizen UK Consulting Limited | Professional & scientific | 2018 |
| KAIZENROCKS365 Ltd | Professional & scientific | 2022 |
| Kaizon Limited | Construction | 2019 |
| Kajetanotrans Ltd | Transport & logistics | 2021 |
| Kaka Locum Limited | Health & social care | 2019 |
| Kakapo Optics Ltd | Wholesale & retail | 2025 |
| Kakapo Properties Ltd | Real estate | 2025 |
| Kakaran Limited | Wholesale & retail | 2024 |
| KAL House Improvements Ltd | Construction | 2016 |
| KAL Portfolio Trading Limited | Extraterritorial | 2013 |
| Kalaiarasi UK Limited | Hospitality | 2023 |
| Kalash Investments Ltd | Real estate | 2020 |
| Kalash Medics Limited | Administrative & support | 2015 |
| Kaleida Kompany Limited | Real estate | 2015 |
| Kaleidoscope IP Group Ltd | Professional & scientific | 2024 |
| Kalenjin Limited | Professional & scientific | 2015 |
| Kalex Cafe Limited | Hospitality | 2018 |
| Kali Properties Limited | Real estate | 2019 |
| Kaliko Entertainment Ltd | Information & communication | 2023 |
| KALIS1 Limited | Financial services | 2022 |
| Kaliyah Cleans Ltd | Administrative & support | 2024 |
| Kalk Bay Developments Ltd | Construction | 2024 |
| Kalkowski Forestry Services Ltd | Agriculture & fishing | 2023 |
| Kallis Group Ltd | Real estate | 2022 |
| Kallis Group Property Ltd | Real estate | 2025 |
| Kallista Properties Ltd | Real estate | 2018 |
| Kallistra Limited | Manufacturing | 1998 |
| Kalm Insight Ltd | Professional & scientific | 2018 |
| Kalon Skin Academy Ltd | Education | 2025 |
| Kalonga Ltd | Health & social care | 2013 |
| Kalossa Limited | Transport & logistics | 2017 |
| Kaltrax Ltd | Information & communication | 2026 |
| Kalusi Consulting Limited | Administrative & support | 2016 |
| KAM Electrical Engineering Ltd | Manufacturing | 2022 |
| KAM Limited | Professional & scientific | 2002 |
| KAM Studios Ltd | Information & communication | 2025 |
| KAM Vehicle Solution Retail Ltd | Wholesale & retail | 2024 |
| Kama Clinical Services Ltd | Other services | 2007 |
| Kamal Food (Nottingham) Limited | Wholesale & retail | 2018 |
| Kamal Food Store Limited | Wholesale & retail | 2018 |
| Kamal JAN and Sons Limited | Wholesale & retail | 2022 |
| Kamann & Co Ltd | Wholesale & retail | 2026 |
| Kamiluk Ltd | Transport & logistics | 2018 |
| Kamva Properties Limited | Real estate | 2016 |
| Kamy 99 Ltd | Other services | 2024 |
| Kamyabi | Manufacturing | 2006 |
| Kanat Ltd | Health & social care | 2024 |
| Kanazi Limited | Health & social care | 2023 |
| Kando Logistics Limited | Other services | 2025 |
| Kandore Limited | Wholesale & retail | 2005 |
| Kandore Takeaway Ltd | Hospitality | 2019 |
| Kandyfans Ltd | Professional & scientific | 2023 |
| Kane & Raymond Limited | Extraterritorial | 1977 |
| Kang HAN Taekwondo Limited | Arts & recreation | 2013 |
| Kangen Centre Nottingham Limited | Wholesale & retail | 2020 |
| Kangenite Ltd | Wholesale & retail | 2020 |
| Kanik Consultancy Ltd | Professional & scientific | 2025 |
| Kano Innovation Ltd | Professional & scientific | 2017 |
| Kanto Investments Limited | Real estate | 2026 |
| Kaos Clothing Limited | Manufacturing | 2001 |
| Kaoula Enterprise Limited | Real estate | 2024 |
| Kapatol Developments (Nottingham) Limited | Construction | 2001 |
| Kapkom Limited | Professional & scientific | 2013 |
| Kappa 1 Ltd | Professional & scientific | 2022 |
| KAPTIV8 Ltd | Administrative & support | 2016 |
| Kaptive CX Limited | Professional & scientific | 2023 |
| Kapture Communications Ltd | Professional & scientific | 2026 |
| Kapwell House Management Company Limited | Households | 2006 |
| Kar-La OFF Licence Limited | Wholesale & retail | 2021 |
| Karadia Limited | Wholesale & retail | 2009 |
| Karan Properties Ltd | Real estate | 2020 |
| Karan Stanley Ltd | Wholesale & retail | 2025 |
| Karash Ltd | Manufacturing | 2024 |
| KARE4UK Limited | Construction | 2025 |
| Kareer Properties Ltd | Real estate | 2017 |
| Karen Avenell Limited | Arts & recreation | 2016 |
| Karen Williams Marketing Limited | Professional & scientific | 2023 |
| Karibim Ventures Limited | Transport & logistics | 2018 |
| Karikana Nottingham Ltd | Administrative & support | 2018 |
| Karimia Association Limited | Other services | 2011 |
| Karke Lebanese Food Ltd | Hospitality | 2022 |
| Karki & Sons Ltd | Wholesale & retail | 2021 |
| Karl Hull Limited | Hospitality | 2018 |
| Karl Marriott Limited | Financial services | 2015 |
| Karl Moult Limited | Administrative & support | 2016 |
| Karl Wood Associates Ltd | Professional & scientific | 2009 |
| Karlita Constructions Ltd | Construction | 2022 |
| Karlsruhe House Limited | Real estate | 2024 |
| Karma Botanics Limited | Health & social care | 2019 |
| Karma IT Solutions Ltd | Information & communication | 2018 |
| Karmacist Limited | Information & communication | 2019 |
| Kartar Holdings Limited | Real estate | 2016 |
| Kartikeya Foods Limited | Wholesale & retail | 2026 |
| Karydis Holding Company Limited | Administrative & support | 2019 |