| J a Garner Associates Ltd | Real estate | 2000 |
| J a Integrated Solutions Limited | Health & social care | 2014 |
| J a Jordan & Associates Limited | Health & social care | 2006 |
| J a Property Company (Bristol) Limited | Real estate | 2016 |
| J Adams Bristol Ltd | Water & waste | 2025 |
| J Adams Transport Limited | Water & waste | 2016 |
| J and J Bristol Brothers Limited | Health & social care | 2015 |
| J and J Construction and Maintenance Ltd | Administrative & support | 2014 |
| J and S Tucker Consulting Ltd | Professional & scientific | 2022 |
| J and TF Properties Ltd | Real estate | 2024 |
| J Andrew Griffiths Limited | Construction | 2016 |
| J B Control Systems Limited | Professional & scientific | 2026 |
| J B Murdoch Properties Limited | Real estate | 2015 |
| J B Palmer Limited | Construction | 2011 |
| J Barnett Limited | Professional & scientific | 2012 |
| J Barrett Holdings Ltd | Professional & scientific | 2025 |
| J Blessed Ltd | Information & communication | 2014 |
| J C Carpentry Ltd | Construction | 2023 |
| J C Equestrian LLP | | 2013 |
| J C Property Investments Limited | Real estate | 1997 |
| J C R Building & Property Developments Ltd | Real estate | 2020 |
| J C Specialist Cars Limited | Professional & scientific | 2005 |
| J C Thomas & Sons Limited | Water & waste | 2002 |
| J C Thomas Group 1924 Limited | Administrative & support | 2003 |
| J Carpentry & Maintenance Ltd | Construction | 2014 |
| J Colt Studio Ltd | Arts & recreation | 2026 |
| J Cook Electrics Limited | Construction | 2017 |
| J Covell Designs Limited | Professional & scientific | 2025 |
| J D AD Art Limited | Professional & scientific | 1979 |
| J D B Software Solutions Limited | Information & communication | 1997 |
| J D Benton Developments Limited | Construction | 2024 |
| J D H Property Holdings Ltd | Real estate | 2021 |
| J D Home Improvements & SON Ltd | Construction | 2016 |
| J D L Consultants Limited | Professional & scientific | 2001 |
| J D Morgan Transport Limited | Transport & logistics | 2012 |
| J D Property Rentals Limited | Real estate | 2019 |
| J D Reynolds & Co. Limited | Professional & scientific | 2012 |
| J D Services (Bristol) Limited | Wholesale & retail | 2025 |
| J D Woodward Building Contractor Ltd | Construction | 2014 |
| J Dolan Home Improvements Ltd | Construction | 2017 |
| J Dooley Plumbing and Heating Limited | Construction | 2014 |
| J E Godwin Properties Ltd | Real estate | 2024 |
| J E Holdings Limited | Financial services | 2006 |
| J E M Environmental Ltd | Construction | 2011 |
| J Edwards Services Ltd | Transport & logistics | 2016 |
| J Estates Ltd | Real estate | 2024 |
| J F K & SON Flooring Contractors Limited | Wholesale & retail | 2016 |
| J Ferris Ltd | Other services | 2020 |
| J Franklin Properties Ltd | Real estate | 2020 |
| J FRY Heating Solutions Limited | Construction | 2001 |
| J G Bricklaying Limited | Construction | 2003 |
| J G Holdings Limited | Construction | 2008 |
| J G Sutton Holdings Ltd | Extraterritorial | 2022 |
| J Gleek Properties Limited | Financial services | 2003 |
| J Graphic & Digital Design Limited | Manufacturing | 2012 |
| J H Agriculture Limited | Agriculture & fishing | 2004 |
| J H Audio Limited | Professional & scientific | 2005 |
| J H Design & Print Ltd | Wholesale & retail | 2020 |
| J H Landscapes Limited | Construction | 2001 |
| J H Plant Hire & Contracting Limited | Administrative & support | 2003 |
| J H Scaffolding Limited | Construction | 1999 |
| J H Screeding Ltd | Construction | 2011 |
| J Harris Construction Limited | Construction | 2017 |
| J Haskins Electrical Ltd | Construction | 2019 |
| J Havard Associates Ltd. | Professional & scientific | 2004 |
| J Hayman Properties Ltd | Real estate | 2025 |
| J House Consulting Ltd | Professional & scientific | 2018 |
| J I Cole Ltd | Wholesale & retail | 2024 |
| J I COX Building Services Limited | Construction | 2005 |
| J J Care Limited | Health & social care | 2012 |
| J J Properties (Bristol) Limited | Real estate | 2020 |
| J J Property Holdings Ltd | Real estate | 2024 |
| J Keddi Limited | Information & communication | 2010 |
| J L Hemmings and SON Ltd | Transport & logistics | 2021 |
| J L Siney & Sons Limited | Construction | 2004 |
| J L Steel Erection Limited | Construction | 2012 |
| J L Windows and Doors Ltd | Manufacturing | 2020 |
| J LOW Property Ltd | Real estate | 2024 |
| J M & J Bartlett Limited | | 1948 |
| J M Car Parts Ltd | Wholesale & retail | 2014 |
| J M Corporate Ltd | Professional & scientific | 2024 |
| J M Hazell Electrical Ltd | Construction | 2007 |
| J M Painting Ltd | Construction | 2018 |
| J M Services (Bristol) Limited | Wholesale & retail | 2007 |
| J Macfarlane Property Management Ltd | Administrative & support | 2025 |
| J Mart Limited | Wholesale & retail | 2026 |
| J Mcalinden Property Ltd | Real estate | 2026 |
| J Moore Roofing Limited | Construction | 2021 |
| J Motors Ltd | Wholesale & retail | 2020 |
| J P Adams Consulting Ltd. | Professional & scientific | 2012 |
| J P Hospitality Limited | Hospitality | 2013 |
| J P Maxwell Limited | Professional & scientific | 2009 |
| J P Properties Bristol Limited | Real estate | 2023 |
| J P Whelan Ltd | Extraterritorial | 2007 |
| J Packer Property Ltd | Real estate | 2023 |
| J Palmer Electrical Ltd | Construction | 2026 |
| J Perry & Sons Ltd | Construction | 2023 |
| J Pheobe Muzei Foundation International Ltd | Other services | 2023 |
| J Point Medical Training Ltd | Education | 2023 |
| J Quick Construction Ltd | Construction | 2019 |