| Join the Dots Consultancy Ltd | Professional & scientific | 2023 |
| Jojo's Corner Ltd | Hospitality | 2024 |
| Jomar Properties (Midlands) Ltd | Real estate | 2020 |
| JON Carr Structural Design Limited | Professional & scientific | 2021 |
| Jon's Tyres (2021) Ltd | Professional & scientific | 2021 |
| Jon's Tyres Ltd | Wholesale & retail | 2003 |
| Jonathan Baggaley Electrical Services Limited | Construction | 2026 |
| Jonathan Reeve Bereavement Services Ltd | Other services | 2014 |
| Jones & Co Advisers Limited | Financial services | 2010 |
| Jones & Co Hair Ltd | Other services | 2026 |
| Jones & Co Properties Limited | Real estate | 2012 |
| Jonski Properties Limited | Real estate | 2017 |
| Joseph Williams Limited | Construction | 2015 |
| Joules Homes Limited | Construction | 2019 |
| Joules Options Limited | Real estate | 2023 |
| Joy & RAY Limited | Professional & scientific | 2024 |
| Joyce Miller Homes Ltd | Real estate | 2021 |
| JP Courier 4U Ltd | Transport & logistics | 2018 |
| JP Events & Consulting Ltd | Professional & scientific | 2025 |
| JP Priceless Services Ltd | Administrative & support | 2026 |
| JPC Networking Ltd | Information & communication | 2025 |
| JPC Property & Developments Limited | Construction | 2021 |
| JPC Property Management Limited | Real estate | 2016 |
| JPD Properties Ltd | Construction | 2005 |
| JPH Home Improvements Ltd | Manufacturing | 2019 |
| JPS Building and Maintenance Services Limited | Construction | 2023 |
| JPS Motorhub Ltd | Wholesale & retail | 2025 |
| JPT Maintenance Ltd | Construction | 2024 |
| JPW Investments Ltd | Financial services | 2019 |
| JPW Planning Solutions Ltd | Professional & scientific | 2026 |
| JR Event Catering Ltd | Hospitality | 2025 |
| JR Groundworks and Civils Limited | Construction | 2015 |
| JRD Digital Ltd | Information & communication | 2011 |
| JRF Property Investments Ltd | Real estate | 2022 |
| JRG Leisure Limited | Hospitality | 2014 |
| JRH Driving Ltd | Transport & logistics | 2013 |
| JRH Engineering Ltd | Professional & scientific | 2024 |
| JS Discounts Ltd | Wholesale & retail | 2014 |
| Js-Creative Cuisine Ltd | Hospitality | 2025 |
| JSB Specialist Transport Limited | Transport & logistics | 2026 |
| Jselvan Limited | Real estate | 2025 |
| JSG Consultation Limited | Arts & recreation | 2025 |
| JSK Security Ltd | Administrative & support | 2026 |
| Jsoc Limited | Health & social care | 2016 |
| JSP Trading Private Limited | Wholesale & retail | 2024 |
| JT Audio Limited | Wholesale & retail | 2012 |
| JTD Property Services Limited | Households | 2025 |
| JTS Storage and Moving Services Ltd | Transport & logistics | 2022 |
| Jublee Hills Limited | Wholesale & retail | 2017 |
| Jucosh Ltd | Hospitality | 2026 |
| Judge Design and Build Limited | Construction | 2020 |
| Judge Developments Limited | Real estate | 2009 |
| Judge Investment Properties Limited | Real estate | 2023 |
| Juelou Events Ltd | Hospitality | 2021 |
| Julie Devitt Limited | Other services | 2010 |
| Julie White Limited | Other services | 2022 |
| Julie's Sandwich Shop Ltd | Wholesale & retail | 2024 |
| Junction 29 Plastics Ltd | Wholesale & retail | 2020 |
| Junction Arts Limited | Arts & recreation | 1984 |
| Junction Bar Chesterfield Ltd | Hospitality | 2016 |
| Jura Watches Limited | Extraterritorial | 2024 |
| Just Cars Chesterfield Ltd | Wholesale & retail | 2010 |
| Just Chesterfield Cars Ltd | Wholesale & retail | 2017 |
| Just My Fashion Ltd | Wholesale & retail | 2026 |
| Just My Look Limited | Wholesale & retail | 2007 |
| Just NIC Medical Aesthetics Ltd | Health & social care | 2022 |
| Just the Menagerie Limited | Information & communication | 2007 |
| Justin James Properties Ltd | Real estate | 2026 |
| JV Medical Supplies Ltd | Health & social care | 2011 |
| JVP Enterprises Ltd | Professional & scientific | 2022 |
| JW Ultrasound Consultancy Ltd | Health & social care | 2023 |
| K & E Roberts Properties Ltd | Real estate | 2023 |
| K B Properties & Management Ltd | Real estate | 2022 |
| K B R Homes Limited | Real estate | 2023 |
| K Davey Civils Limited | Construction | 2025 |
| K E Platts & SON Limited | Construction | 2007 |
| K L Installations Ltd | Construction | 2019 |
| K M F Properties Ltd. | Real estate | 2024 |
| K N Forktrucks Limited | Manufacturing | 2017 |
| K R Surg Ltd | Health & social care | 2015 |
| K Stop Developments Ltd | Households | 2023 |
| K&M IT Solutions Limited | Information & communication | 2019 |
| K&Pg Holdings Limited | Financial services | 2025 |
| K.A.S. Construction Limited | Construction | 2003 |
| K.H. Painting & Decorating Services Ltd | Construction | 2017 |
| K.M. Chairs (Retford) Limited | Transport & logistics | 1974 |
| Kadir Kilincarslan Limited | Wholesale & retail | 2025 |
| Kaizen Cars Detailing Ltd | Wholesale & retail | 2025 |
| Kakou CIC | Manufacturing | 2016 |
| Kakou Technologies Limited | Professional & scientific | 2017 |
| Kaleidoscope Inner Harmony Ltd | Administrative & support | 2022 |
| Kama Care Limited | Health & social care | 2026 |
| Kamar Flooring Limited | Extraterritorial | 2010 |
| Kamrul Hussain Mortgages Limited | Financial services | 2019 |
| Kandid 24 Healthcare Ltd. | Administrative & support | 2015 |
| Kanguard Security Ltd | Administrative & support | 2025 |
| Kapingar Limited | Information & communication | 2025 |
| Karl Morgan T/A Walgrove Garage Limited | Real estate | 2002 |
| Karl Rayner Limited | Wholesale & retail | 2003 |
| Karmagik Limited | Wholesale & retail | 2016 |