| Jonathon’S Limited | Wholesale & retail | 2018 |
| Jordanebanks Limited | Other services | 2025 |
| JOT Property Management Ltd | Real estate | 2025 |
| JOT Transport Limited | Transport & logistics | 2025 |
| Joyful Janitors Service Ltd | Administrative & support | 2025 |
| Joys Express Limited | Wholesale & retail | 2022 |
| JP Construction (Midland) Ltd | Construction | 2021 |
| JR Cladding Ltd | Construction | 2023 |
| JR Property’S Development Ltd | Real estate | 2025 |
| JSD Host Ltd | Real estate | 2018 |
| JSK7 Limited | Transport & logistics | 2009 |
| Jsmk Commercial Limited | Construction | 2025 |
| Jsmk Limited | Real estate | 2023 |
| JSN News and Wine Ltd | Wholesale & retail | 2025 |
| JSN Retail Ltd | Wholesale & retail | 2022 |
| JSR Contracts Limited | Construction | 2012 |
| JSR Midlands Ltd | Real estate | 2025 |
| Jssr Property Ltd | Real estate | 2025 |
| JT Residences Ltd | Real estate | 2025 |
| JTS Transport Limited | Transport & logistics | 2021 |
| JTS Transport Solutions Limited | Transport & logistics | 2024 |
| Jubilee Corporation Limited | Health & social care | 2026 |
| Just DO IT Roofing & Building Ltd | Construction | 2026 |
| Just Plant Hire UK Ltd | Construction | 2020 |
| Just Straight Talk Community Interest Company | Health & social care | 2012 |
| Jusur Limited | Education | 2025 |
| JV Autos Repairss Limited | Administrative & support | 2025 |
| Jztroath Respiratory and Sleep Diagnostic Services Ltd | Health & social care | 2024 |
| K and L Developments Limited | Real estate | 2025 |
| K Brar Homes Ltd | Real estate | 2024 |
| K.B. 2006 Limited | Other services | 2006 |
| K.O.H. Sportcards Ltd | Wholesale & retail | 2020 |
| K2 Beauty Ltd | Other services | 2026 |
| Kada Media Limited | Information & communication | 2009 |
| KAE Tech Solutions Limited | Wholesale & retail | 2024 |
| Kafain Consultancy Ltd | Construction | 2024 |
| Kahlon Haulage Ltd | Transport & logistics | 2017 |
| KAK Healthcare Services Limited | Health & social care | 2016 |
| Kaler Group Ltd | Transport & logistics | 2026 |
| Kaler Trading Company Limited | Real estate | 2018 |
| Kalmore Limited | Administrative & support | 2014 |
| Kamberi Commercial Ltd | Construction | 2025 |
| Kamberi Home Improvements Ltd | Construction | 2025 |
| Kamberi Ltd | Construction | 2024 |
| Kampioni Logistics Ltd | Transport & logistics | 2022 |
| Kang Supply & Trade Ltd | Wholesale & retail | 2026 |
| Kangspace Ltd | Construction | 2025 |
| KAR Land and Developments Limited | Construction | 2017 |
| Karak Chai BNS Ltd | Wholesale & retail | 2025 |
| Kareer Courier Limited | Transport & logistics | 2019 |
| Karlson Group Limited | Administrative & support | 2024 |
| Karwal Holdings Ltd | Financial services | 2023 |
| Karwals Ltd | Real estate | 2023 |
| Kaur Freight Ltd | Transport & logistics | 2026 |
| Kaura Construction Limited | Construction | 2018 |
| Kavanagh's a C Services Limited | Energy | 2024 |
| Kayelle Designs Ltd | Manufacturing | 2020 |
| Kayes Consultancy Limited | Information & communication | 2017 |
| Kayes Property Investment Ltd | Real estate | 2019 |
| KDJ Barbers Ltd | Other services | 2025 |
| Keefz and Blewusi Limited | Health & social care | 2020 |
| Keerat Ltd | Transport & logistics | 2022 |
| Kelly Care Services Limited | Health & social care | 2026 |
| Kenwill Ltd | Administrative & support | 2021 |
| Key Coats Ltd | Construction | 2018 |
| KFD Investment Ltd | Real estate | 2026 |
| Kgag Investments Limited | Real estate | 2024 |
| KH98 Limited | Construction | 2025 |
| Khalis Group Ltd | Transport & logistics | 2022 |
| Khela Investment Group Limited | Financial services | 2024 |
| Khilafah Online Limited | Education | 2012 |
| Kings Haulage Ltd | Transport & logistics | 2020 |
| Kiriyash Ltd | Wholesale & retail | 2022 |
| Kitchen BOX7 Ltd | Hospitality | 2025 |
| Kito Enterprises Ltd | Hospitality | 2026 |
| Kiva Wears Limited | Manufacturing | 2025 |
| KJI Properties Ltd | Real estate | 2026 |
| KJP Property Solutions Ltd | Real estate | 2023 |
| KK Sofas & Furniture Ltd | Manufacturing | 2025 |
| Klassik Kutz Ltd | Administrative & support | 2017 |
| Klassy White Limited | Real estate | 2020 |
| KM Deliveries Limited | Transport & logistics | 2025 |
| KMC Food Group Limited | Manufacturing | 2022 |
| Kmcfg Holdings Limited | Professional & scientific | 2022 |
| Knaves Property Services Ltd | Real estate | 2025 |
| Knightsbridge Apertures Ltd | Extraterritorial | 2021 |
| Kohinoor Cuisine Ltd | Hospitality | 2025 |
| Komotk Properties Limited | Real estate | 2025 |
| Kompfort Ltd | Wholesale & retail | 2023 |
| Kona Family Care Agent Limited | Health & social care | 2017 |
| Kooner Hardware Company Limited | Wholesale & retail | 2025 |
| Kooner Properties U.K. Ltd | Real estate | 2021 |
| Kooner Shop Fitters Limited | Manufacturing | 2018 |
| Kpel Limited | Health & social care | 2022 |
| KRD Barbers Ltd | Other services | 2021 |
| Krivco Investments Limited | Real estate | 2023 |
| Krivco Properties Limited | Real estate | 2025 |
| KRT Testing Services Limited | Construction | 2026 |
| KS1 Property Limited | Real estate | 2025 |
| KSA Haulage Ltd | Transport & logistics | 2025 |