| Jp's Foodbox Ltd | Hospitality | 2020 |
| JPA Services Ltd | Real estate | 2025 |
| JPD Security Ltd | Administrative & support | 2014 |
| Jpkh Logistics Ltd | Transport & logistics | 2026 |
| Jplatt Design Engineering Ltd | Professional & scientific | 2024 |
| JPM Hair Limited | Other services | 2019 |
| JPR Roofing and Flooring Limited | Construction | 1984 |
| JR & SR Properties Limited | Real estate | 2016 |
| JR7'S Grassroots Boots CIC | Arts & recreation | 2026 |
| JRA Estates Ltd | Real estate | 2026 |
| JRB Construction Ltd | Construction | 2020 |
| JRB Plant & Surfacing Ltd | Construction | 2021 |
| JRH Coal Merchants Limited | Financial services | 2022 |
| JRJ Construction Services Ltd | Construction | 2023 |
| JRJ Family Ltd | Real estate | 2020 |
| JRJ Global Ltd | Administrative & support | 2019 |
| JRS Technologies Limited | Information & communication | 2021 |
| JS Bars & Pubs Ltd | Hospitality | 2024 |
| JS Branding Limited | Wholesale & retail | 2020 |
| JS Properties (Stafford) Limited | Real estate | 2002 |
| JS Randhawa Transport Ltd | Transport & logistics | 2026 |
| JSA Developments & Properties Ltd | Real estate | 2022 |
| JSB Technologies Limited | Professional & scientific | 2020 |
| Jsbm Ltd | Hospitality | 2023 |
| JSC ST Properties Limited | Real estate | 2020 |
| JSJ Precision Engineering Limited | Manufacturing | 2020 |
| Jsjs Engineering Ltd | Professional & scientific | 2011 |
| JSM 247 Ltd | Transport & logistics | 2022 |
| JSM Sales Agencies Ltd | Wholesale & retail | 2021 |
| Jsm.T Ltd | Hospitality | 2023 |
| JSO Couriers Ltd | Transport & logistics | 2024 |
| JSP Group Ltd | Wholesale & retail | 2015 |
| JSP HR Services Ltd | Administrative & support | 2024 |
| JSR Business Management Ltd | Professional & scientific | 2021 |
| Jsrt Logistics Ltd | Transport & logistics | 2026 |
| JSW Building Solutions Ltd | Construction | 2012 |
| JT Golf Ltd | Arts & recreation | 2021 |
| JT Kelter Ltd | Professional & scientific | 2025 |
| JT Plant & Transport Consultant Ltd | Construction | 2024 |
| Jtbo Construction Limited | Construction | 2025 |
| JTD Fleet Management Ltd | Administrative & support | 2025 |
| JTF Group Ltd | Wholesale & retail | 2024 |
| JTW Technical Services Ltd | Manufacturing | 2025 |
| JU Delivery Express Ltd | Transport & logistics | 2026 |
| JU Developments Limited | Construction | 2021 |
| Jubjub Holdings Limited | Financial services | 2022 |
| Jubjub Properties Limited | Real estate | 2022 |
| Jubok UK Limited | Health & social care | 2025 |
| Judi Thorley Solutions Ltd | Professional & scientific | 2013 |
| Judosa Integrated Ltd | Wholesale & retail | 2025 |
| Juice N Boost Limited | Wholesale & retail | 2025 |
| Juiced Property Solutions Limited | Other services | 2021 |
| Juju Construction Ltd | Construction | 2015 |
| Jukejam Music Ltd | Arts & recreation | 2022 |
| Julei Ltd | Transport & logistics | 2025 |
| Jumbo Holdings Limited | Wholesale & retail | 2007 |
| Jumbo House 511 Limited | Hospitality | 2023 |
| Junaid's Trade Ltd | Wholesale & retail | 2025 |
| Jungle Leaders Limited | Information & communication | 2025 |
| Juniper UK Group Limited | Wholesale & retail | 2019 |
| Jupeter (UK) Ltd | Professional & scientific | 2009 |
| Jupeter EPA Limited | Education | 2020 |
| Jupit Ltd | Transport & logistics | 2017 |
| JUS Makhni Property Ltd | Real estate | 2020 |
| Just 4 U 2020 Limited | Transport & logistics | 2024 |
| Just F Kids Ltd | Wholesale & retail | 2018 |
| Just Geezers Ltd | Other services | 2013 |
| Just Meat Direct Ltd | Wholesale & retail | 2018 |
| Just Meat Direct Retail Limited | Wholesale & retail | 2020 |
| Just Perfect Wines Ltd | Wholesale & retail | 2013 |
| Just Property Electrical Limited | Construction | 2026 |
| Just Shop Trading Limited | Wholesale & retail | 2017 |
| Just Translation Ltd | Professional & scientific | 2023 |
| Just Travel Private Hire Limited | Transport & logistics | 2021 |
| Just WED Ltd | Other services | 2023 |
| Just XJS Cars Limited | Wholesale & retail | 2014 |
| Justin Boyle Limited | Construction | 2016 |
| Justin Dale Limited | Manufacturing | 2015 |
| JUU Traders Ltd | Wholesale & retail | 2024 |
| JVH Property Investment Ltd | Real estate | 2022 |
| JVH Trading Ltd | Households | 2023 |
| JVS Services Ltd | Professional & scientific | 2024 |
| Jvsd Property Limited | Real estate | 2026 |
| JVT Estates Limited | Wholesale & retail | 2024 |
| JW Accountancy and Bookkeeping Ltd | Professional & scientific | 2024 |
| JW Car and Commercials Ltd | Wholesale & retail | 2020 |
| JW Duffield Limited | Information & communication | 2025 |
| JW Electrical Staffordshire Limited | Manufacturing | 2014 |
| JWC Stoke Ltd | Administrative & support | 2018 |
| JWC & SMC Consultancy Ltd | Professional & scientific | 2026 |
| JWH Logistics & Storage UK Ltd | Transport & logistics | 2026 |
| JWH Logistics Ltd | Transport & logistics | 2024 |
| JWI Global Ltd | Professional & scientific | 2000 |
| JWK Holdings Ltd | Real estate | 2019 |
| JWK Media Ltd | Administrative & support | 2025 |
| JWL Building & Roofing Ltd | Construction | 2009 |
| JWL Consulting Ltd | Professional & scientific | 2026 |
| K & G Hughes Limited | Construction | 2012 |
| K & M Elite Construction Limited | Construction | 2026 |
| K & R Properties & Investments Ltd | Real estate | 2017 |