| J LOW Medical Services Limited | Health & social care | 2008 |
| J M Dale Plumbing & Heating Services Ltd | Construction | 2017 |
| J M E Dance Company Limited | Arts & recreation | 2019 |
| J M Energy Solutions Limited | Construction | 2015 |
| J M Geoghegan Limited | Health & social care | 2025 |
| J M Transport (Essex) Limited | Transport & logistics | 2012 |
| J M W Holdings Limited | Real estate | 2017 |
| J M Wills and Legal Services Limited | Professional & scientific | 2013 |
| J Marsh Limited | Financial services | 2019 |
| J Masemola Ltd | Health & social care | 2026 |
| J Mccallum Production Services Ltd | Information & communication | 2019 |
| J Mobiles Notts Ltd | Wholesale & retail | 2025 |
| J N Hallam Engineering Limited | Agriculture & fishing | 2002 |
| J N S Property Solutions Ltd | Real estate | 2025 |
| J Neecey Brickwork Limited | Construction | 2025 |
| J P Building Solutions Ltd | Construction | 2006 |
| J P E Systems Limited | Information & communication | 2010 |
| J P Mitchell Mortgages & Protection Limited | Professional & scientific | 2019 |
| J P T Solutions Limited | Information & communication | 2003 |
| J Pedroche LLP | | 2015 |
| J Pell Properties Limited | Other services | 2014 |
| J R B Food Safety Ltd | Professional & scientific | 2015 |
| J R D Properties Limited | Real estate | 1999 |
| J R J Developments (UK) Ltd | Construction | 2020 |
| J R J Investments (UK) Ltd | Real estate | 2020 |
| J R M International Limited | Manufacturing | 1998 |
| J R Media Enterprises Ltd | Information & communication | 2012 |
| J R Shouler Trading Estate Management Company Ltd | Real estate | 2021 |
| J Rushton Ltd | Professional & scientific | 2021 |
| J S B C Limited | Professional & scientific | 1999 |
| J S Mahal Holdings Limited | Financial services | 2024 |
| J Samuel & Sons Precision Roofing Limited | Construction | 2023 |
| J Smart Surveying Limited | Administrative & support | 2005 |
| J Stevens GAS & Home Ltd | Construction | 2021 |
| J Swingler Holdings Ltd | Financial services | 2025 |
| J T Armstrong Commerce Limited | Professional & scientific | 2019 |
| J T Ball Limited | Real estate | 2023 |
| J T C Properties (Nott'M) Limited | Real estate | 2007 |
| J T Geldard Ltd | Transport & logistics | 2023 |
| J T Learning Limited | Education | 2013 |
| J T Recruit Ltd | Administrative & support | 2002 |
| J Taylor Properties Limited | Real estate | 2022 |
| J Varci Properties Ltd | Real estate | 2024 |
| J W Alvey & SON Ltd | Wholesale & retail | 2024 |
| J W Joinery Contractors Limited | Construction | 2014 |
| J W Pearl Ltd | Real estate | 2021 |
| J Wetton Electrical Services Limited | Construction | 2007 |
| J Wright Building Ltd | Construction | 2026 |
| J Wright Painting & Decorating Limited | Construction | 2019 |
| J Wynn Car Sales Limited | Wholesale & retail | 2011 |
| J&A Marts Ltd | Wholesale & retail | 2020 |
| J&A Servicing and MOT Ltd | Wholesale & retail | 2021 |
| J&B Joinery Contracts Ltd | Construction | 2012 |
| J&B Solties Limited | Real estate | 2024 |
| J&B Solutions Ltd | Construction | 2021 |
| J&C Logistics Ltd | Transport & logistics | 2025 |
| J&D Property Management Limited | Households | 2023 |
| J&E Development Limited | Transport & logistics | 2008 |
| J&H E Limited | Arts & recreation | 2025 |
| J&I Multi-Services Limited | Professional & scientific | 2013 |
| J&J Corp Ltd | Administrative & support | 2022 |
| J&Km Limited | Health & social care | 2012 |
| J&M Cleaning Solutions Ltd | Administrative & support | 2025 |
| J&M Property (Nottm) Ltd | Real estate | 2021 |
| J&M PUB Co Ltd | Hospitality | 2021 |
| J&N Care Services Ltd | Health & social care | 2022 |
| J&P ASD Management Co Ltd | Education | 2014 |
| J&P Logistics Ltd | Transport & logistics | 2017 |
| J&R C Properties Limited | Real estate | 2023 |
| J&R Estates Limited | Real estate | 2015 |
| J&R Housing Solutions Ltd | Real estate | 2025 |
| J&S Convenience Store Limited | Wholesale & retail | 2025 |
| J&S Electrical & Renewables Ltd | Construction | 2026 |
| J&S Fencing and Maintenance Limited | Construction | 2020 |
| J&S Finance Ltd | Real estate | 2022 |
| J&S Health Limited | Health & social care | 2025 |
| J&S Property Lets Ltd | Households | 2023 |
| J&S Roofing and Building Ltd | Construction | 2025 |
| J&S Supplies Ltd | Wholesale & retail | 2023 |
| J&Spence Plumbing and Heating Services Ltd | Construction | 2025 |
| J-Cast Property Developments Limited | Real estate | 2021 |
| J-Curve Strategies Limited | Professional & scientific | 2019 |
| J-Links Solution Ltd | Information & communication | 2026 |
| J. & B. Properties (Long Eaton) Limited | Real estate | 1966 |
| J. & S. Co Properties Limited | Real estate | 2024 |
| J. Amsson Venues Ltd | Real estate | 2022 |
| J. Hansam Estates Limited | Professional & scientific | 2017 |
| J. Ingram Limited | Information & communication | 2024 |
| J. Luscombe Associates Limited | Transport & logistics | 2000 |
| J. Mccann & Co. (Nottm) Limited | Construction | 1987 |
| J. P. Carty Electrical Contractors Limited | Construction | 1996 |
| J. Pawson Properties Ltd | Real estate | 2025 |
| J. S. M. (Builders and Joiners) Limited | Construction | 1982 |
| J. S. M. Engineering Limited | Manufacturing | 1980 |
| J. Shillitto (Forage) Limited | Manufacturing | 1977 |
| J. Walster Limited | Real estate | 1985 |
| J. Weston & Sons Limited | Construction | 2009 |
| J. Wilkinson Plumbing & Heating Limited | Construction | 2004 |
| J.A. Kent Services (East Midlands) Limited | Administrative & support | 1976 |
| J.A. Kent Services Developments Limited | Construction | 2014 |