| J R Auto Sales Ltd | Wholesale & retail | 2025 |
| J R Care Ltd | Administrative & support | 2019 |
| J R P R Limited | Professional & scientific | 2003 |
| J R Racing Services Limited | Arts & recreation | 2018 |
| J R Steel Fabrication Limited | Construction | 2014 |
| J R Tyson Ltd | Information & communication | 2025 |
| J Ransome Limited | Construction | 2013 |
| J Register Limited | Administrative & support | 2022 |
| J Roberts & Sons Limited | Administrative & support | 2005 |
| J Robertson Ltd | Other services | 2024 |
| J Robinson Engineering Ltd | Professional & scientific | 2023 |
| J Roche Building Services Ltd | Construction | 2026 |
| J Roche Electrical Limited | Construction | 2014 |
| J Ryan Heating Services Limited | Construction | 2019 |
| J S a Taxi Ltd | Transport & logistics | 2022 |
| J S Bistro Ltd | Hospitality | 2024 |
| J S D Industrial Roofing Limited | Construction | 2020 |
| J S Reakes Ltd | Professional & scientific | 2012 |
| J S Sebugwawo Limited | Transport & logistics | 2014 |
| J Souch Trading and Investing Ltd | Professional & scientific | 2021 |
| J Squared Properties Limited | Real estate | 2019 |
| J Sutherland Consulting Limited | Administrative & support | 2021 |
| J T General Services Ltd | Real estate | 2023 |
| J T Ince Building & Maintenance Limited | Construction | 2005 |
| J T Palmer Ltd | Manufacturing | 2006 |
| J T Property and Development Ltd | Real estate | 2024 |
| J to O Electrical Services Ltd | Construction | 2025 |
| J Vincent Lofts Limited | Construction | 2021 |
| J W Aviation Ltd | Transport & logistics | 2023 |
| J W Brickwork Limited | Construction | 2005 |
| J W Presland Ltd | Construction | 2007 |
| J W Webdev Ltd | Information & communication | 2018 |
| J Wallis Ltd | Construction | 2023 |
| J Warrack Limited | Administrative & support | 2011 |
| J White Electrical Services Limited | Construction | 2012 |
| J Wild Accounting and Audit Limited | Professional & scientific | 2018 |
| J Wild Consultancy & Bookkeeping Services Ltd | Professional & scientific | 2015 |
| J&A Collective Ltd | Wholesale & retail | 2025 |
| J&A Smiles Ltd | Health & social care | 2019 |
| J&B Decorating Services Ltd | Construction | 2020 |
| J&B Properties Bristol Ltd | Real estate | 2025 |
| J&B Wilson Enterprises Ltd | Hospitality | 2023 |
| J&Bash Ltd | Wholesale & retail | 2023 |
| J&Co Property Services Ltd | Information & communication | 2022 |
| J&D Southwest Ltd | Construction | 2016 |
| J&E Cleaning Services Limited | Administrative & support | 2024 |
| J&F Renovation Group Ltd | Construction | 2026 |
| J&F Restaurants Ltd | Real estate | 2020 |
| J&H Residential Holdings Ltd | Real estate | 2024 |
| J&J Cash Limited | Wholesale & retail | 2009 |
| J&J Ideal Lets Ltd | Real estate | 2023 |
| J&Jcreations Ltd | Manufacturing | 2025 |
| J&K Property Group Ltd | Real estate | 2024 |
| J&L Distributions Ltd | Wholesale & retail | 2024 |
| J&L Home and Garden Improvements Ltd | Administrative & support | 2025 |
| J&L Home Construction Limited | Construction | 2024 |
| J&L Properties (Bristol) Ltd | Real estate | 2022 |
| J&M Lettings Limited | Real estate | 2025 |
| J&N UN Limited | Wholesale & retail | 2020 |
| J&R Heritage Ltd | Real estate | 2026 |
| J&R Philippine Food Market & Catering Ltd | Wholesale & retail | 2026 |
| J&S Giles Limited | Construction | 2022 |
| J&S Orchard Properties Ltd | Hospitality | 2024 |
| J&T Cutz Ltd | Other services | 2025 |
| J&T SW Services Ltd | Administrative & support | 2024 |
| J&Tm Services Ltd | Hospitality | 2026 |
| J&W Play Ltd | Arts & recreation | 2023 |
| J'S Autofast Repairs Limited | Wholesale & retail | 2018 |
| J'S Bristol Property Services Limited | Wholesale & retail | 2006 |
| J-Cut Videography Ltd | Information & communication | 2022 |
| J-Mac Group Ltd | Financial services | 2022 |
| J-Tech MOT Limited | Wholesale & retail | 2019 |
| J. & J. Carpenters Ltd. | Construction | 1993 |
| J. a. Equestrian Ltd | Agriculture & fishing | 2021 |
| J. Barton Connect Ltd | Professional & scientific | 2026 |
| J. Buckingham Rendering, Renovations & Plastering Specialist Ltd | Construction | 2021 |
| J. Crozier (Builder) Limited | Construction | 1985 |
| J. Crozier Limited | Other services | 1957 |
| J. D. Refrigeration & Air Conditioning Limited | Construction | 2004 |
| J. E. Harris Electrical Limited | Professional & scientific | 2017 |
| J. Edwards Associates Limited | Other services | 2003 |
| J. F. M. Plant Hire Limited | Administrative & support | 1994 |
| J. K. Carpentry & Construction Limited | Construction | 2009 |
| J. Parker & Co Ltd. | Construction | 1999 |
| J. Priddice Groundworks Ltd | Construction | 2024 |
| J. S. Clean IT Limited | Administrative & support | 2011 |
| J. Sawicki and Partners Ltd | Professional & scientific | 2022 |
| J. V. Barrett & Co. Limited | Manufacturing | 1975 |
| J. Wieckowski Consulting UK Ltd | Real estate | 2022 |
| J.A.C.S.(Uk) Limited | Manufacturing | 2001 |
| J.A.Pitt (Hallatrow) Limited | Transport & logistics | 1968 |
| J.A.T. Environmental Reclamation Limited | Wholesale & retail | 2002 |
| J.B. Contracts | | 1997 |
| J.B. Contracts (Avon) Limited | Wholesale & retail | 1990 |
| J.B. Farriery Services Ltd | Professional & scientific | 2014 |
| J.Burford Ltd | Wholesale & retail | 2022 |
| J.C Lighting & Entertainment Ltd | Manufacturing | 2023 |
| J.C.Portman Estate Ltd | Real estate | 2021 |
| J.Customz Ltd | Manufacturing | 2023 |
| J.D.M.S Carpentry Ltd | Construction | 2013 |