| Jastar Properties Ltd | Construction | 2021 |
| Jasv Properties Ltd | Real estate | 2016 |
| Jasv Support Ltd | Information & communication | 2023 |
| JAT Physiotherapy Limited | Administrative & support | 2006 |
| Jatouk Limited | Wholesale & retail | 2024 |
| JAV Express Ltd | Wholesale & retail | 2026 |
| Javer Labs Ltd | Professional & scientific | 2022 |
| Jawahir Trading Ltd | Other services | 2022 |
| Jaws Developments Limited | Real estate | 2021 |
| JAY ARE Ltd | Financial services | 2011 |
| JAY Blinds Ltd | Other services | 2026 |
| JAY Care Services Ltd | Health & social care | 2021 |
| JAY Emmet Limited | Professional & scientific | 2017 |
| JAY Trim Limited | Wholesale & retail | 1981 |
| JAY2 Limited | Other services | 2014 |
| Jaya Rama Bhagya Holdings Ltd | Financial services | 2023 |
| Jayangusstudios Ltd | Professional & scientific | 2025 |
| Jaybee's Realty Ltd | Real estate | 2025 |
| Jaycees Enterprises Limited | Wholesale & retail | 2020 |
| Jaycity Limited | Extraterritorial | 2022 |
| Jayden Bailey Ltd | Transport & logistics | 2019 |
| Jayes Heating & Plumbing Ltd | Construction | 1999 |
| Jayess World Travels Limited | Administrative & support | 2004 |
| Jayger UK Limited | Wholesale & retail | 2015 |
| Jayinc Ltd | Administrative & support | 2025 |
| Jayla Consultancy Ltd | Education | 2022 |
| Jaymar (Nottingham) Limited | Real estate | 2005 |
| Jaymax Leisure Limited | Wholesale & retail | 2022 |
| Jayplas Building Supplies Ltd | Wholesale & retail | 2010 |
| Jayplas Nottingham Ltd | Wholesale & retail | 2022 |
| Jays Rentals Limited | Administrative & support | 2025 |
| Jaysbuilder Ltd | Real estate | 2026 |
| Jaysons Commercial Enterprises Ltd | Real estate | 1986 |
| Jaysons Dental Services Ltd | Health & social care | 2019 |
| Jaysons Holdings Company Limited | Financial services | 2020 |
| Jaysons Pharmacy Limited | Wholesale & retail | 1986 |
| Jaytai Health Limited | Health & social care | 2019 |
| Jayto Ltd | Financial services | 2025 |
| Jay’S Recycling Ltd | Water & waste | 2025 |
| JAZ Motors Ltd | Wholesale & retail | 2025 |
| Jazz Bunny Limited | Information & communication | 2017 |
| Jazzhouse (Nottinghamshire) Limited | Arts & recreation | 2008 |
| Jazzs Stores Ltd | Wholesale & retail | 2020 |
| JB & Co (Nottingham) Ltd | Construction | 2025 |
| JB 360 Entertainment Ltd | Information & communication | 2025 |
| JB Aircraft Engineering Limited | Manufacturing | 2018 |
| JB Builders Nottingham Ltd | Construction | 2022 |
| JB Colston Limited | Professional & scientific | 2021 |
| Jb's (ENV Services) Limited | Administrative & support | 2009 |
| JBC Plant Hire (Nottingham) Ltd | Administrative & support | 2009 |
| JBF Ancoats Ltd | Hospitality | 2018 |
| JBF Wilmslow Limited | Hospitality | 2021 |
| JBH Maintenance Ltd | Construction | 2025 |
| Jbhs Transport Ltd | Transport & logistics | 2024 |
| JBK Deluxe Ltd | Wholesale & retail | 2024 |
| JBK Electrical (Nottingham) Ltd | Construction | 2023 |
| JBK Holdings Limited | Real estate | 2017 |
| JBK Retail Ltd | Wholesale & retail | 2025 |
| JBL Property Services Ltd | Real estate | 2024 |
| JBL Textiles Limited | Administrative & support | 2007 |
| JBM Landscaping Ltd | Administrative & support | 2019 |
| JBM Property Group Ltd | Real estate | 2021 |
| Jbohp Ltd | Real estate | 2026 |
| Jbrc Ltd | Construction | 2026 |
| JBS (Fish & Chips) Ltd | Hospitality | 2003 |
| JBS Ltd | Wholesale & retail | 2020 |
| JBT Housing Limited | Real estate | 2019 |
| JBW Electrical and Security Limited | Manufacturing | 2016 |
| JC Asset Finance Ltd | Financial services | 2023 |
| JC Dell Ltd | Public administration | 2022 |
| JC Domus Ltd | Real estate | 2025 |
| JC Fearon Ltd | Real estate | 2025 |
| JC Scaffolding Ltd | Construction | 2026 |
| Jc&G Consultancy Ltd | Professional & scientific | 2022 |
| JCC Transport Services Limited | Wholesale & retail | 2015 |
| JCE Properties (Worksop) Limited | Real estate | 2015 |
| JCH Interiors Ltd | Construction | 2012 |
| JCH Joinery Ltd | Construction | 2024 |
| JCH Renovations Limited | Real estate | 2026 |
| JCI Ventures Ltd | Financial services | 2024 |
| JCJ Renovations (EM) Limited | Real estate | 2023 |
| JCL Construction Limited | Construction | 2010 |
| Jcland Global Ltd | Real estate | 2019 |
| JCM New Roofs Ltd | Construction | 2026 |
| Jcmm Properties Ltd | Real estate | 2019 |
| JCP Electrical Contractors Ltd | Construction | 2025 |
| JCP Power and Data Contractors Limited | Construction | 2010 |
| JCR Health Care Ltd | Health & social care | 2020 |
| JCR Investments Limited | Real estate | 2020 |
| JCS Leisure Ltd | Hospitality | 2020 |
| JCS Software Limited | Information & communication | 2013 |
| JCT (Nottingham) Limited | Real estate | 2020 |
| JCT Learning Ltd | Education | 2018 |
| JCT Trading Ltd | Wholesale & retail | 2025 |
| Jctmotorcycles Ltd | Wholesale & retail | 2025 |
| JCW Coaching and Consulting Ltd | Professional & scientific | 2024 |
| JCW Maintenance Services Limited | Professional & scientific | 2024 |
| JD Automotive Nottingham Limited | Wholesale & retail | 2017 |
| JD Business Transformation Limited | Professional & scientific | 2020 |
| JD Construction (Gedling) Limited | Construction | 2025 |