| Juan Quars Limited | Professional & scientific | 2019 |
| Jubilee Business Park (Plot 8) Management Company Limited | Real estate | 2006 |
| Jubilee Business Park (Plot One) Management Company Limited | Real estate | 2005 |
| Jubilee Capital (UK) Ltd | Professional & scientific | 2017 |
| Jubobs Limited | Health & social care | 2024 |
| Judah Living Properties Ltd | Real estate | 2025 |
| Jude Living Ltd | Construction | 2026 |
| Jude Thaddaeus Ltd | Other services | 2020 |
| Judith Hart Jewellers Limited | Wholesale & retail | 2010 |
| Juggling Octopus Business Support Ltd | Administrative & support | 2018 |
| Julian Burd Engineering Services Limited | Manufacturing | 2011 |
| Julie Care Limited | Health & social care | 2015 |
| Julie Mccrery Limited | Financial services | 2024 |
| Julie Todd Cardiology Ltd | Professional & scientific | 2024 |
| Juliet Dunn Design Limited | Manufacturing | 2008 |
| Jullyval Ltd | Administrative & support | 2025 |
| Jumping Clay Derby Ltd | Education | 2013 |
| Juna Housing Ltd | Real estate | 2025 |
| Junction 1 Dealership Limited | Wholesale & retail | 2021 |
| Jungle Cafe Ltd | Agriculture & fishing | 2024 |
| Juniper Home Care Ltd | Health & social care | 2021 |
| Juniper Partners Property Management Limited | Real estate | 2015 |
| Juno Telecoms Ltd | Professional & scientific | 2003 |
| Jupiter Exports Limited | Wholesale & retail | 2022 |
| Jupiter Site Services Limited | Professional & scientific | 2010 |
| Jur-As 80 Ltd | Transport & logistics | 2017 |
| Jura Aerotech Ltd | Manufacturing | 2025 |
| Jura Property Development Ltd | Construction | 2025 |
| Jura Property Services Limited | Real estate | 2024 |
| Jurij's Solutions Ltd | Information & communication | 2021 |
| Just Amazing Bargains Ltd | Wholesale & retail | 2023 |
| Just Beauty.Muskan Limited | Other services | 2021 |
| Just Brickwork (S.Carr & SON) Ltd. | Construction | 2008 |
| Just Construction Limited | Administrative & support | 2007 |
| Just Drinks (Derby) Ltd | Wholesale & retail | 2023 |
| Just Electrical Contracting Ltd | Construction | 2025 |
| Just Electrical Training Ltd. | Education | 2016 |
| Just Fitee Ltd | Wholesale & retail | 2021 |
| Just Headley Futures Ltd | Real estate | 2024 |
| Just Hearing Ltd | Health & social care | 2023 |
| Just Kanvas Ltd | Information & communication | 2025 |
| Just Living Limited | Wholesale & retail | 2019 |
| Just Property Developing Ltd | Construction | 2025 |
| Just Some Theatre CIC | Education | 2025 |
| Just-Sparkle Ltd | Wholesale & retail | 2020 |
| JUST4MED Ltd | Health & social care | 2026 |
| Justcom Distribution Limited | Information & communication | 2016 |
| Justendo Limited | Health & social care | 2016 |
| Justin Ingrey Mentoring Ltd | Professional & scientific | 2022 |
| Justine Tyas Limited | Financial services | 2021 |
| Jute Construction Ltd | Construction | 2023 |
| Juziz Limited | Health & social care | 2023 |
| JV Developments Derby Ltd | Households | 2025 |
| JVM Desai Limited | Hospitality | 2025 |
| Jvw-Hr Ltd | Administrative & support | 2019 |
| JW Alvaston Limited | Hospitality | 2019 |
| JW Property Ventures Limited | Real estate | 2020 |
| JWB Flooring Limited | Construction | 2006 |
| Jwear Ltd | Manufacturing | 2020 |
| Jwellness Ltd | Other services | 2023 |
| JWH Isolations Limited | Construction | 2014 |
| JWH Rail Solutions Limited | Construction | 2016 |
| JWP Group Limited | Wholesale & retail | 2006 |
| Jwtc Trading Limited | Wholesale & retail | 2025 |
| JX Strategic Holdings Ltd | Financial services | 2025 |
| JX2 Limited | Real estate | 2010 |
| JXC Holdings Ltd | Real estate | 2025 |
| JZ 1 Ltd | Health & social care | 2023 |
| JZ Parker Ltd | Manufacturing | 2023 |
| JZ Power Engineering Ltd | Professional & scientific | 2018 |
| K Brown Electrical Services Limited | Construction | 2008 |
| K & a Financial Services Limited | Financial services | 2016 |
| K & a Investments Midlands Limited | Real estate | 2023 |
| K & a Parkinson Limited | Professional & scientific | 2014 |
| K & J RAJ Haulage Limited | Transport & logistics | 2023 |
| K & K Fire Protection Engineers Limited | Other services | 1976 |
| K & K Properties Derby Ltd | Real estate | 2024 |
| K & M Holiday Homes Ltd | Hospitality | 2024 |
| K a Brooks Electrical Limited | Construction | 2004 |
| K a Investment Properties Limited | Real estate | 2006 |
| K a Rehan Limited | Professional & scientific | 2018 |
| K and a Convenience Store Midland Limited | Wholesale & retail | 2022 |
| K Bazar Derby Limited | Wholesale & retail | 2025 |
| K Bramley Holdings Ltd | Financial services | 2026 |
| K C Construction (Midlands) Ltd | Construction | 2016 |
| K C Housing Ltd | Real estate | 2017 |
| K C Jones (Conference & Events) Limited | Administrative & support | 2004 |
| K Chalmers Property Limited | Real estate | 2025 |
| K D Darby Contracts Ltd | Construction | 2003 |
| K D S (Derby) Limited | Hospitality | 2014 |
| K F P Associates Limited | Administrative & support | 2014 |
| K Freudenreich Properties Ltd | Households | 2026 |
| K H. Packaging & Disposables Ltd | Administrative & support | 1998 |
| K J Transport Limited | Transport & logistics | 1995 |
| K K Brreach Limited | Wholesale & retail | 2014 |
| K L Burdon Investments Ltd | Real estate | 2025 |
| K N Holdings (Derby) Limited | Real estate | 2022 |
| K Nails & Spa Beauty Ltd | Other services | 2024 |
| K P Conway Limited | Construction | 2008 |
| K R Mortgages Limited | Financial services | 2023 |