| Jungle Video Ltd | Information & communication | 2016 |
| Junior Cricket Bristol Ltd | Arts & recreation | 2025 |
| Junior Darts Corporation Ltd | Arts & recreation | 2010 |
| Junior Premier League Limited | Arts & recreation | 2012 |
| Juniper Court Care Limited | Health & social care | 2022 |
| Juniper Group Debt Holding Ltd | Financial services | 2026 |
| Juniper Homes (Bath) Ltd | Construction | 2017 |
| Juniper Homes (BOA) Limited | Construction | 2017 |
| Juniper Homes (Easton) Ltd | Construction | 2019 |
| Juniper Homes (Granville) Limited | Construction | 2017 |
| Juniper Homes (Rangeworthy) Ltd | Construction | 2018 |
| Juniper Homes (Southville) Limited | Construction | 2014 |
| Juniper Homes (Wilder) Limited | Construction | 2017 |
| Juniper Homes Holdings Limited | Financial services | 2024 |
| Juniper Homes Limited | Construction | 2017 |
| Juniper Kitchens Limited | Manufacturing | 2020 |
| Junk Monsters Limited | Water & waste | 2014 |
| Junk Poet Ltd | Arts & recreation | 2017 |
| Jupiter (Ashton) Limited | Real estate | 2015 |
| Jupiter (Cheltenham) Limited | Real estate | 2016 |
| Jupiter Emerging & Frontier Income Trust PLC | Financial services | 2017 |
| Jupiter Security Solutions Ltd. | Administrative & support | 2025 |
| Jupiter Ventures Limited | Real estate | 2001 |
| Jupiter Ventures Number 2 Limited | Real estate | 2017 |
| Jurash Ltd | Transport & logistics | 2024 |
| Jurassic Bark Dogs Ltd | Extraterritorial | 2021 |
| Jurassic Events Ltd | Hospitality | 2020 |
| Jurassic View Ltd | Extraterritorial | 2021 |
| Jurg 108 Property Ltd | Real estate | 2020 |
| Juristenhof Limited | Other services | 2017 |
| Juro Spain Limited | Administrative & support | 2026 |
| Juscproperty Ltd | Real estate | 2021 |
| Jussor Global Education Services Ltd | Administrative & support | 2026 |
| Just Air Conditioning Limited | Construction | 2009 |
| Just Alex Ltd | Information & communication | 2024 |
| Just Arrived Limited | Transport & logistics | 2026 |
| Just AS YOU ARE Tea Cottage Ltd | Hospitality | 2019 |
| Just by Design Ltd | Professional & scientific | 2023 |
| Just Canned Ltd | Administrative & support | 2022 |
| Just Collect Limited | Administrative & support | 2019 |
| Just Collecting (UK) Limited | Administrative & support | 2021 |
| Just Creative (Bristol) Ltd | Professional & scientific | 2024 |
| Just Duggal IT Ltd | Financial services | 2026 |
| Just Energy 1 Limited | Financial services | 2024 |
| Just Farm Ltd | Professional & scientific | 2020 |
| Just Feedback Ltd | Information & communication | 2023 |
| Just Just Productions Ltd | Information & communication | 2024 |
| Just Lets @ Bristol Limited | Real estate | 2006 |
| Just Lets Management Limited | Real estate | 2016 |
| Just Panels Limited | Extraterritorial | 2005 |
| Just Pressed Cider Limited | Manufacturing | 2020 |
| Just Rock Holdings Ltd | Administrative & support | 2025 |
| Just Scrumptious Ltd | Hospitality | 2018 |
| Just Tankers Ltd | Real estate | 2020 |
| Just US Creative Ltd | Administrative & support | 2017 |
| Just Vehicle Group Ltd | Wholesale & retail | 2024 |
| Just Wild Limited | Agriculture & fishing | 2009 |
| Just Words Limited | Construction | 1996 |
| Justgoodsolutions Limited | Professional & scientific | 2019 |
| Justice Colab Ltd | Professional & scientific | 2022 |
| Justin Bishop Services Ltd | Construction | 2023 |
| Justin Pro Services Limited | Construction | 2024 |
| Justirie Limited | Wholesale & retail | 2022 |
| Justjuliant Limited | Health & social care | 2015 |
| Juura Holdings Ltd | Financial services | 2025 |
| Juuwu Ltd | Wholesale & retail | 2025 |
| Juvo Limited | Professional & scientific | 1997 |
| JV Bikes Limited | Wholesale & retail | 2017 |
| JV Property Investors Limited | Real estate | 2013 |
| JV Trans Ltd | Transport & logistics | 2014 |
| Jvbr Consultancy Limited | Other services | 2017 |
| JVM Solutions Limited | Wholesale & retail | 2014 |
| JVP Holdings Limited | Financial services | 2021 |
| JVS Partnership UK Ltd | Professional & scientific | 2019 |
| JVT Legal Ltd | Professional & scientific | 2026 |
| JVW Properties Ltd | Real estate | 2019 |
| JW & SH Properties Limited | Real estate | 2025 |
| JW Accountancy Limited | Professional & scientific | 2010 |
| JW Agri Services Limited | Other services | 2012 |
| JW Carpentry and Build Ltd | Construction | 2022 |
| JW Group South West Limited | Construction | 2021 |
| JW IT Services Limited | Information & communication | 2018 |
| JW Properties (Leeds) Limited | Real estate | 2017 |
| JW Property (Bristol) Limited | Real estate | 2025 |
| JW Strange Ltd | Health & social care | 2018 |
| JW Town Planning Ltd | Professional & scientific | 2025 |
| JW Veterinary Services Ltd | Professional & scientific | 2023 |
| Jwbode Limited | Wholesale & retail | 2010 |
| JWD Property Consultants Ltd | Real estate | 2025 |
| JWG South West Limited | Financial services | 2026 |
| JWH Marine Services Limited | Manufacturing | 2021 |
| Jwhebb Engineering Services Ltd | Professional & scientific | 2022 |
| Jwjbsj Limited | Information & communication | 2024 |
| Jwjc Properties Ltd | Real estate | 2020 |
| JWL Plant Limited | Wholesale & retail | 2016 |
| JWR Flooring Limited | Wholesale & retail | 2017 |
| JWR Wind Tech Ltd | Professional & scientific | 2025 |
| JWS Electrical Contractors Limited | Manufacturing | 2003 |
| JWT Capital Ltd | Financial services | 2025 |
| Jw’S Property Services Limited | Construction | 2021 |