| Jurisprudence & Diligence Management Ltd | Professional & scientific | 2024 |
| Jusark Interiors Ltd | Construction | 2022 |
| Jusc Contract Ltd | Construction | 2024 |
| Just Courier 2025 Limited | Transport & logistics | 2025 |
| Just for FUN Ltd | Wholesale & retail | 2019 |
| Just for Humanity | Health & social care | 2025 |
| Just in Time Agency (JIT) Ltd | Administrative & support | 2016 |
| Just in Time Solutions Limited | Transport & logistics | 2020 |
| Just Kids Daycare (RM1) Ltd | Education | 2025 |
| Just Kids Daycare Limited | Health & social care | 2020 |
| Just Lettings London Limited | Real estate | 2026 |
| Just Litigate Ltd | Professional & scientific | 2024 |
| Just Move Ltd | Real estate | 2010 |
| Just Protect IT Limited | Real estate | 2022 |
| Just Saver Ltd | Information & communication | 2026 |
| Just Smart Ltd | Information & communication | 2011 |
| Just SO Italian Limited | Hospitality | 2018 |
| Just Soup Limited | Hospitality | 2024 |
| Just Sparky Ltd | Construction | 2025 |
| JUST4KIDS Day Nursery & Pre-School Limited | Education | 2014 |
| JUST4WATCHES Limited | Wholesale & retail | 2021 |
| Justcoursebooking Ltd | Professional & scientific | 2022 |
| Justin Facades Ltd | Construction | 2019 |
| Justwatches Limited | Wholesale & retail | 2020 |
| Jusya Limited | Wholesale & retail | 2025 |
| Juve T Mars 369 Ltd | Hospitality | 2025 |
| JV Holdings Limited | Real estate | 2021 |
| JV TEC Software Solutions Limited | Information & communication | 2012 |
| JV Transport Ltd | Transport & logistics | 2024 |
| JWC Medical Limited | Health & social care | 2020 |
| JWD Direct Ltd | Administrative & support | 2017 |
| Jwin Service Station Ltd | Wholesale & retail | 2018 |
| JWP Distributors Ltd | Wholesale & retail | 2024 |
| JY Consultancy Limited | Administrative & support | 2019 |
| JZ Traders (London) Ltd | Wholesale & retail | 2023 |
| JZM Global Limited | Transport & logistics | 2025 |
| K & a Building Services Ltd | Real estate | 2023 |
| K & a Developments Ltd | Other services | 2015 |
| K & a Orza Ltd | Transport & logistics | 2016 |
| K & a Properties Group Ltd | Real estate | 2026 |
| K & B Traders Co Limited | Wholesale & retail | 2023 |
| K & C Group Ltd | Professional & scientific | 2024 |
| K & C Motors Ltd | Wholesale & retail | 2025 |
| K & M Western Limited | Other services | 1982 |
| K & Mcevoy Ltd | Real estate | 2020 |
| K & P Renovations Limited | Construction | 1999 |
| K & S (London) Ltd | Wholesale & retail | 2011 |
| K & Shah Ltd | Hospitality | 2021 |
| K & T Property Group Ltd | Real estate | 2022 |
| K & V Gardening London Ltd | Administrative & support | 2024 |
| K & W (UK) Ltd | Education | 2014 |
| K 1 Tyres Limited | Wholesale & retail | 2009 |
| K a Inc Limited | Real estate | 2021 |
| K and D Property Developments Limited | Construction | 2020 |
| K and N Cleaning Services Ltd | Administrative & support | 2024 |
| K and S Motor Services Limited | Administrative & support | 2000 |
| K and S Supermarket Ltd | Wholesale & retail | 2024 |
| K B S Bars Limited | Hospitality | 2010 |
| K Bhagwan Limited | Real estate | 2021 |
| K Brand Limited | Wholesale & retail | 2013 |
| K Bridge Ltd | Financial services | 2017 |
| K Capital (Castle Grove) Ltd | Real estate | 2024 |
| K Capital Camberley Ltd | Real estate | 2025 |
| K Capital Holdings Limited | Real estate | 2020 |
| K Capital Ltd | Real estate | 2010 |
| K Cheema Investments Ltd | Real estate | 2021 |
| K Customz Ltd | Wholesale & retail | 2024 |
| K Dhingra Limited | Real estate | 2025 |
| K Doubleglazing Limited | Manufacturing | 2008 |
| K Electronic Gadgets Ltd | Wholesale & retail | 2021 |
| K G Dispensing Ltd | Wholesale & retail | 2019 |
| K I Commercial Limited | Construction | 2023 |
| K J Motors Services Ltd | Wholesale & retail | 2025 |
| K K & S Properties Ltd | Real estate | 2025 |
| K K Capital Investments Ltd | Construction | 2015 |
| K Kamaly Services Limited | Health & social care | 2022 |
| K Movers Limited | Transport & logistics | 2017 |
| K N Global Limited | Wholesale & retail | 2019 |
| K P Properties & Management Limited | Real estate | 2022 |
| K Rooster Ltd | Hospitality | 2019 |
| K S a Investment Limited | Real estate | 2022 |
| K S Juti Ltd | Real estate | 2024 |
| K S Plumb and Heat Ltd | Construction | 2019 |
| K S R Bakers UK Ltd | Wholesale & retail | 2009 |
| K S Solution London Limited | Construction | 2013 |
| K Smile Ltd | Construction | 2018 |
| K Sons Limited | Financial services | 2019 |
| K T I Systems Limited | Information & communication | 2011 |
| K Teck Ltd | Wholesale & retail | 2023 |
| K W Starling Limited | Construction | 2015 |
| K&B Technologies Limited | Other services | 2016 |
| K&C Property Investments Ltd | Real estate | 2026 |
| K&C1 Limited | Real estate | 2025 |
| K&D Infotech Limited | Information & communication | 2017 |
| K&D Sivas Limited | Real estate | 2024 |
| K&E Pest Control Ltd | Administrative & support | 2023 |
| K&Gmechanical Limited | Construction | 2025 |
| K&K London Ltd | Hospitality | 2019 |
| K&Kr Limited | Real estate | 2022 |
| K&L Fixing Ltd | Construction | 2015 |