| JSI Standard Ltd | Wholesale & retail | 2018 |
| Jsidhu Ltd | Real estate | 2026 |
| JSJ Estates Ltd | Real estate | 2025 |
| JSJ Superstore Ltd | Wholesale & retail | 2024 |
| JSK Autos Ltd | Wholesale & retail | 2019 |
| JSK Builder Services Limited | Construction | 2020 |
| JSK Line Ltd | Transport & logistics | 2025 |
| JSM 14 Distributions Ltd | Wholesale & retail | 2024 |
| JSM Finds Ltd | Wholesale & retail | 2024 |
| JSN Haulage Ltd | Transport & logistics | 2015 |
| Jsnk UK Properties Ltd | Real estate | 2023 |
| Jsps Properties Limited | Real estate | 2025 |
| JSR Hospitality Lewes Ltd | Hospitality | 2025 |
| JSR Khaira Group Ltd | Hospitality | 2018 |
| Jsrk Homes Limited | Real estate | 2024 |
| JSS Contractors Ltd | Transport & logistics | 2023 |
| JSS Global Enterprise UK Limited | Agriculture & fishing | 2024 |
| Jssr LLP | | 2007 |
| Jsva Properties Ltd | Real estate | 2022 |
| JT Advance Ltd | Real estate | 2025 |
| JTP Properties Ltd | Real estate | 2014 |
| JTR Fried Limited | Hospitality | 2016 |
| Jubilee Carpets & Flooring Ltd | Construction | 2012 |
| Jubilee Properties Hayes Limited | Real estate | 2026 |
| Jujhar Global Ltd | Construction | 2023 |
| Juliens Property Maintenance Limited | Energy | 2023 |
| Juls Care Limited | Other services | 2015 |
| Junior Arabist Limited | Administrative & support | 2013 |
| Juno Construction Ltd | Construction | 2025 |
| Jupitor Construction Limited | Construction | 2025 |
| JUS and REM Limited | Information & communication | 2022 |
| Just 8 Curry Ltd | Hospitality | 2023 |
| Just Bounce Ltd | Arts & recreation | 2022 |
| Just Burgers Bedfont Ltd | Hospitality | 2023 |
| Just Chauffeurs Ltd | Transport & logistics | 2023 |
| Just IT Solutions Ltd | Wholesale & retail | 2023 |
| Just Mortgage Ltd | Financial services | 2018 |
| Just Simply Supplying Limited | Transport & logistics | 2025 |
| Juxtaposition Limited | Construction | 2015 |
| JVC (Midlands) Ltd | Real estate | 2020 |
| JVC Investments Limited | Real estate | 2002 |
| JVM Properties Limited | Real estate | 2004 |
| JVM Transport Limited | Transport & logistics | 2024 |
| Jwala Singh Cricket Academy (UK) Ltd | Education | 2023 |
| Jyot Constructions Ltd | Construction | 2021 |
| JZ Building Services Ltd | Construction | 2023 |
| K & B Design & Builds Ltd | Construction | 2018 |
| K & D Investment Ltd | Wholesale & retail | 2018 |
| K & K Transport and Travel Ltd | Transport & logistics | 2025 |
| K & S Property Management Ltd | Real estate | 2018 |
| K a Plumbing Supplies Ltd | Wholesale & retail | 2026 |
| K Bajwa Contruction Ltd | Construction | 2022 |
| K Connect London Ltd | Wholesale & retail | 2022 |
| K Electrical Services Limited | Construction | 2011 |
| K G Enterprise (London) Ltd | Real estate | 2023 |
| K Rental Properties Ltd | Real estate | 2023 |
| K S Property Investments Limited | Real estate | 2016 |
| K Yogarajah Transport Ltd | Transport & logistics | 2021 |
| K&B Oscar Ltd | Real estate | 2025 |
| K&M Group Limited | Water & waste | 2018 |
| K&M Halal Meat Ltd | Wholesale & retail | 2023 |
| K&S Car Wash Ltd | Administrative & support | 2023 |
| K&S Designing Limited | Construction | 2020 |
| K.K. Luimbe Cleaning Services Ltd | Administrative & support | 2017 |
| K.P.S.G Ltd | Professional & scientific | 2009 |
| K.R Urban Link Express Limited | Transport & logistics | 2025 |
| K.S.C Construction Ltd | Construction | 2024 |
| K.T.Singh Construction Ltd | Construction | 2021 |
| K2 FIX Ltd | Wholesale & retail | 2026 |
| K2 Motors Hayes Ltd | Wholesale & retail | 2026 |
| K2 Motors Plus Ltd | Professional & scientific | 2018 |
| K2S Cosy Houses Limited | Real estate | 2026 |
| K2S Property Couple Limited | Real estate | 2026 |
| K2S Real Estate Limited | Financial services | 2025 |
| K3 Property Group Ltd | Real estate | 2021 |
| KA Courier Service Ltd | Transport & logistics | 2025 |
| KA Fitness Ltd | Information & communication | 2025 |
| KA Properties UK Ltd | Real estate | 2017 |
| Kaaj Nationwide Ltd | Real estate | 2023 |
| Kabir IT Consultancy Limited | Information & communication | 2018 |
| Kadence Ltd | Information & communication | 2024 |
| Kadm Professional Services Ltd | Other services | 2021 |
| Kafla Ltd | Real estate | 2025 |
| Kahlon Construction Services Limited | Construction | 2026 |
| Kahlon Logistics Ltd | Transport & logistics | 2020 |
| Kahloon Ltd | Administrative & support | 2022 |
| Kaidouk Ltd | Wholesale & retail | 2025 |
| Kailash Logistics Ltd | Transport & logistics | 2024 |
| Kainemitchellproperty Ltd | Real estate | 2022 |
| Kairon Construction Ltd | Construction | 2022 |
| Kaizay Property Limited | Real estate | 2020 |
| Kajriwala Construction Ltd | Construction | 2026 |
| KAK Innovations PVT Ltd | Information & communication | 2026 |
| Kakkar Ltd | Real estate | 2018 |
| Kakkar Sons Limited | Wholesale & retail | 2023 |
| Kalandar Property (London) Limited | Real estate | 2018 |
| Kaleem Group of Companies Ltd | Wholesale & retail | 2020 |
| Kaleere Ltd | Wholesale & retail | 2025 |
| Kaler Scaffolding Ltd | Construction | 2026 |
| Kaley Ltd | Real estate | 2019 |