| Jseh Limited | Professional & scientific | 2022 |
| Jsgr Ltd | Real estate | 2024 |
| JSGR2 Ltd | Real estate | 2026 |
| JSK Motor Sales Limited | Wholesale & retail | 2023 |
| JSK Property Sourcing Ltd | Real estate | 2024 |
| JSK Services Limited | Wholesale & retail | 2008 |
| Jskmarket Ltd | Wholesale & retail | 2025 |
| Jskstuffforsale Limited | Other services | 2018 |
| JSM Transportation Ltd | Transport & logistics | 2026 |
| JSN Store Ltd | Wholesale & retail | 2024 |
| JSP Builders Ltd | Construction | 2024 |
| Jspowar Ltd | Health & social care | 2023 |
| Jsquare Technologies Ltd | Information & communication | 2019 |
| JSR Group Estates Ltd | Professional & scientific | 2023 |
| JSR Group Investments Ltd | Professional & scientific | 2023 |
| JSR Investment Group Limited | Real estate | 2022 |
| JSR Trading Ltd | Hospitality | 2023 |
| JSS Family Harmony Ventures Ltd | Wholesale & retail | 2025 |
| JSS Solutions Ltd | Professional & scientific | 2025 |
| JSS Transport Ltd | Transport & logistics | 2025 |
| Jssr Engineering Services Limited | Professional & scientific | 2024 |
| Jsst Foods Ltd | Transport & logistics | 2019 |
| JSU Capital Limited | Real estate | 2025 |
| JSU Properties Limited | Real estate | 2024 |
| JSU Wholesale Ltd | Wholesale & retail | 2026 |
| JSW Enterprises Limited | Professional & scientific | 2018 |
| JT Professional Management Services Limited | Professional & scientific | 2021 |
| JTB Alpha Construction Ltd | Construction | 2024 |
| Jtfc Limited | Education | 2025 |
| Jtit Services Ltd | Information & communication | 2025 |
| JTS Safety Services Ltd | Extraterritorial | 2015 |
| Jttw Ltd | Hospitality | 2024 |
| Jubilee Court (Newtown) Management Company Limited | Real estate | 2005 |
| Jude and James Ltd | Real estate | 2026 |
| Jude Emergency Electrican Ltd | Construction | 2025 |
| Jude Jacob Cameron-Douglas Limited | Extraterritorial | 2025 |
| Jude MED Ltd | Health & social care | 2025 |
| Judge Carpets Ltd | Wholesale & retail | 2015 |
| Judge Construction Services Ltd | Construction | 2023 |
| Judge Investments Ltd | Real estate | 2024 |
| Juice & Deli Ltd | Wholesale & retail | 2026 |
| Juicy Marcomms Ltd | Professional & scientific | 2018 |
| JUJ Trading Estates Ltd | Wholesale & retail | 2022 |
| Julbella Property Limited | Real estate | 2025 |
| Julie Construction Ltd | Construction | 2026 |
| Jumaa Supermarket Ltd | Other services | 2022 |
| Jumeirah Homes Ltd | Real estate | 2024 |
| Jumera Ltd | Professional & scientific | 2021 |
| Junction 11 Motors Ltd | Wholesale & retail | 2017 |
| Junction 11 Repairs Ltd | Wholesale & retail | 2023 |
| Jungdroip Services Ltd | Information & communication | 2026 |
| Jungle Gym Adventure Play and Café CIC | Hospitality | 2025 |
| Jungle Solutions Limited | Real estate | 2026 |
| Juniper Training Holdings Limited | Financial services | 2020 |
| Juniper Training Limited | Education | 2003 |
| JUR System Ltd | Construction | 2020 |
| Jurta Ltd | Hospitality | 2013 |
| Juss Financial Solutions Ltd | Professional & scientific | 2007 |
| Juss Property Solutions Ltd | Construction | 2021 |
| Just ADD Music (J.A.M) CIC | Information & communication | 2025 |
| Just ASK Dino.Com Limited | Extraterritorial | 2009 |
| Just BE Successful Ltd | Real estate | 2011 |
| Just Bedrooms and Kitchens Ltd | Manufacturing | 2023 |
| Just Bumpers Ltd | Manufacturing | 2023 |
| Just Difrent Caravans Limited | Hospitality | 2024 |
| Just Difrent Music Ltd | Wholesale & retail | 2018 |
| Just German Motors Limited | Wholesale & retail | 2025 |
| Just Gti's Ltd | Wholesale & retail | 2019 |
| Just JAG Education Limited | Information & communication | 2021 |
| Just Keys Limited | Wholesale & retail | 1996 |
| Just Patties Logistic Limited | Hospitality | 2016 |
| Just Ramps C.I.C. | Arts & recreation | 2012 |
| Just TOW IT Ltd | Transport & logistics | 2025 |
| Just Vegan Ltd | Manufacturing | 2026 |
| Justenrolled Ltd | Administrative & support | 2020 |
| Justified Mindsets Ltd | Wholesale & retail | 2023 |
| Justservice Limited | Wholesale & retail | 2001 |
| Juventuele Aesthetics Limited | Other services | 2018 |
| Juwealth Digital Ltd | Wholesale & retail | 2025 |
| JV Celebrations Ltd | Wholesale & retail | 2021 |
| JVL Flipside Ltd | Wholesale & retail | 2022 |
| JVR Courier Ltd | Transport & logistics | 2020 |
| JVT Delivery Partner Ltd | Transport & logistics | 2024 |
| JW Supplies (JWS) Ltd | Wholesale & retail | 2026 |
| JWD Timber Ltd | Wholesale & retail | 2022 |
| JWO Consultancy Limited | Professional & scientific | 2024 |
| JWR Solar Installations Limited | Construction | 2022 |
| JYJ Sraan Investments Ltd | Real estate | 2023 |
| JZS Property (UK) Limited | Real estate | 2025 |
| J’Sons Garden Services Limited | Administrative & support | 2023 |
| K & a Property Investments Limited | Real estate | 2005 |
| K & AB Property Management Ltd | Real estate | 2025 |
| K & D Homes Limited | Real estate | 2024 |
| K & M Associates Limited | Professional & scientific | 2013 |
| K & M Investments Limited | Real estate | 2014 |
| K & Meetcha Property Ltd | Real estate | 2025 |
| K & N Wade Accounting Ltd | Professional & scientific | 2024 |
| K & S Gents Hairdressing Ltd | Other services | 2015 |
| K & S Real Estate Ltd | Real estate | 2024 |
| K & S Skips Ltd | Water & waste | 2018 |