| Izmir Barber Studio 2 Ltd | Other services | 2025 |
| Izone London Limited | Wholesale & retail | 2013 |
| Izotec Ltd | Construction | 2015 |
| IZS Ltd | Financial services | 2026 |
| Izsa Limited | Financial services | 2016 |
| IZV Construction Ltd | Construction | 2024 |
| Izzokailamin Ltd | Health & social care | 2022 |
| I’M New Here Ltd | Wholesale & retail | 2025 |
| J & a Associate Limited | Professional & scientific | 2007 |
| J & a Growers Limited | Agriculture & fishing | 2002 |
| J & a Mortgage Advice Ltd | Financial services | 2018 |
| J & B (Leicester) Ltd | Wholesale & retail | 2011 |
| J & B Business Support Services Limited | Administrative & support | 2017 |
| J & B Stone Garage Services Limited | Wholesale & retail | 2005 |
| J & C AAA Ltd | Wholesale & retail | 2018 |
| J & E Hospitality Ltd | Real estate | 2025 |
| J & F Sutton Sheet Metal (UK) Limited | Other services | 2009 |
| J & G Vesty Haulage Limited | Transport & logistics | 2003 |
| J & H Supermarket Limited | Wholesale & retail | 2020 |
| J & I Construction Limited | Construction | 2026 |
| J & J Motors (Leicester) Limited | Wholesale & retail | 2002 |
| J & J Resourcing Limited | Construction | 2014 |
| J & JAY Fabrics (Coventry) Limited | Manufacturing | 2001 |
| J & K Care Ltd | Financial services | 2025 |
| J & M News Limited | Wholesale & retail | 2012 |
| J & M Properties (Loughborough) Ltd | Real estate | 2020 |
| J & P Fencing Limited | Construction | 2005 |
| J & P Sonpal Holding Limited | Financial services | 2025 |
| J & R DAR Limited | Health & social care | 2013 |
| J & R Security Limited | Construction | 2006 |
| J & S Flooring Limited | Wholesale & retail | 2003 |
| J & S Hair Salon Ltd | Other services | 2024 |
| J & S Holdings ( Leicester ) Ltd | Financial services | 2024 |
| J & S Home Appliances Ltd | Wholesale & retail | 2010 |
| J & S INV Ltd | Real estate | 2022 |
| J & S Mehat Properties Ltd | Real estate | 2019 |
| J & S Properties (Leicester) Ltd | Real estate | 2012 |
| J & S Thanki Properties Ltd | Real estate | 2023 |
| J & S Travel Limited | Administrative & support | 2016 |
| J a & S H Reason Limited | Professional & scientific | 2013 |
| J a Hardman Limited | Health & social care | 2010 |
| J Adcock & Sons Electrical Contractors Limited | Construction | 2011 |
| J and B Property Holdings Ltd | Real estate | 2019 |
| J and D Leicester Limited | Wholesale & retail | 2022 |
| J and E Motorss Ltd | Wholesale & retail | 2025 |
| J and Rays Ltd | Professional & scientific | 2016 |
| J and S Howkins Landscapes Limited | Administrative & support | 2014 |
| J Aston Courier Services Limited | Transport & logistics | 2018 |
| J B Fleet Services Ltd | Wholesale & retail | 2019 |
| J Ball Contracts Ltd | Construction | 2018 |
| J Best Games Limited | Hospitality | 2016 |
| J Blockley Construction Limited | Construction | 2013 |
| J C Randle Carpentry Ltd | Construction | 2014 |
| J C Brew Ltd | Wholesale & retail | 2024 |
| J C Cockrell Builders Limited | Construction | 2005 |
| J C L Services (Leicester) Limited | Manufacturing | 2004 |
| J C Motors (UK) Ltd | Wholesale & retail | 2016 |
| J C Trans (UK) Ltd | Transport & logistics | 2005 |
| J C Veasey Ltd | Construction | 2013 |
| J Chahal Properties Ltd | Real estate | 2022 |
| J Coates Group Ltd | Financial services | 2023 |
| J D C Civils Limited | Construction | 2020 |
| J D C Companies Limited | Financial services | 2024 |
| J D C Developments (2026) Limited | Construction | 2026 |
| J D C Plant Limited | Financial services | 2024 |
| J D C Stabilisation Limited | Construction | 2024 |
| J D I Project Management Limited | Administrative & support | 2008 |
| J D Promotions Limited | Professional & scientific | 2001 |
| J D Shopfitting Ltd | Construction | 2015 |
| J D T Brickwork Limited | Construction | 2015 |
| J E Allen Services Limited | Transport & logistics | 2000 |
| J E Martin Limited | Other services | 2000 |
| J E Sheard Ltd | Professional & scientific | 2021 |
| J Grant Ltd | Real estate | 2024 |
| J Green Carpentry Ltd | Construction | 2017 |
| J H Amin Ltd. | Financial services | 2010 |
| J H Electrical Contracting Limited | Construction | 2002 |
| J Haulage Ltd | Transport & logistics | 2024 |
| J Hollings Ltd | Professional & scientific | 2025 |
| J J Scaffolding (Leicester) Limited | Construction | 2018 |
| J J Storage Ltd | Hospitality | 2023 |
| J J Vaghela & Company Limited | Professional & scientific | 2013 |
| J Jadeja Ltd | Health & social care | 2020 |
| J K 3 Enterprise Ltd | Wholesale & retail | 2020 |
| J K Building Kavir Ltd | Construction | 2023 |
| J K Haulage (Leicester) Limited | Transport & logistics | 2014 |
| J K Mehta Ltd | Real estate | 2026 |
| J K Motors Limited | Wholesale & retail | 2025 |
| J K Wealth Management Limited | Financial services | 2012 |
| J Kailey Anaesthesia Ltd | Health & social care | 2019 |
| J Kent Holdings Ltd | Financial services | 2020 |
| J Khaira Sonography Ltd | Health & social care | 2025 |
| J Kingra Construction Limited | Construction | 2024 |
| J L Jeffries Ltd | Construction | 2020 |
| J L Maintenance Ltd | Construction | 2022 |
| J LAD Investment Ltd | Real estate | 2020 |
| J Lamb Services Limited | Wholesale & retail | 2015 |
| J Levy & Sons Limited | Professional & scientific | 2019 |
| J Lewin Turf Supplies Ltd | Construction | 2010 |
| J M Cooper Knitwear Ltd | Extraterritorial | 2023 |