| JMR Transportservices Ltd | Transport & logistics | 2022 |
| JMR Weldconsult Services Limited | Professional & scientific | 2023 |
| Jmstradingz Ltd | Wholesale & retail | 2026 |
| Jmte Consultancy Ltd | Professional & scientific | 2022 |
| JNP Holdings Limited | Financial services | 2017 |
| JNT Property Solutions Ltd | Real estate | 2022 |
| JOE Aspinall Ltd | Arts & recreation | 2020 |
| John Parr & Sons (Farms) Limited | Agriculture & fishing | 1964 |
| John Ross Builders Limited | Construction | 2003 |
| Johnnyx Care Limited | Health & social care | 2013 |
| Johnson Media Ltd | Information & communication | 2019 |
| Joli Consulting Limited | Professional & scientific | 2023 |
| JON Cogley Butchers Ltd. | Wholesale & retail | 2019 |
| JON Mitchell Associates Limited | Professional & scientific | 2011 |
| Jones Plant & Power Ltd | Wholesale & retail | 2025 |
| Joshua Benjamin Howard Ltd | Information & communication | 2025 |
| Joy and JOE Ltd | Manufacturing | 2013 |
| Joy and JOE Properties Limited | Real estate | 2018 |
| Joy and JOE Rainford Ltd | Wholesale & retail | 2008 |
| Joy and JOE Retail Ltd | Wholesale & retail | 2021 |
| Joy Free Community Employment Training FDT Ltd | Professional & scientific | 2025 |
| Joy Free JOB Training CIC | Education | 2025 |
| Joyce Sports Management Ltd | Other services | 2024 |
| JP Lakeside Ltd | Real estate | 2025 |
| Jpds Telecoms Ltd | Manufacturing | 2021 |
| JPG PM Ltd | Information & communication | 2026 |
| JPL Retail Ltd | Wholesale & retail | 2022 |
| JPM Investment Properties Ltd | Real estate | 2024 |
| Jprm Ltd | Professional & scientific | 2025 |
| JPS Development and Construction Limited | Real estate | 2026 |
| JPX Consulting Limited | Other services | 2018 |
| JR IT Consulting Ltd | Other services | 2018 |
| Jruban Ltd | Wholesale & retail | 2026 |
| JS Cars (NW) Limited | Wholesale & retail | 2021 |
| JS Group Construction Ltd | Construction | 2020 |
| JSB Plant Services Ltd | Construction | 2017 |
| Jsmp Trading Ltd | Wholesale & retail | 2022 |
| Jsts (NW) Ltd | Real estate | 2026 |
| JT Recruitment Ltd | Administrative & support | 2026 |
| JTD Holdings Limited | Real estate | 2025 |
| Jtmgastromed Ltd | Health & social care | 2025 |
| JTR Direct Ltd | Information & communication | 2013 |
| Jujon Global Limited | Wholesale & retail | 2009 |
| Juke B Creative Ltd | Information & communication | 2026 |
| Jules Coaching Ltd | Health & social care | 2025 |
| Julie Waterhouse Hair Limited | Other services | 2010 |
| Junction Properties (ST. Helens) Limited | Real estate | 1993 |
| Just Renovating Ltd | Construction | 2025 |
| Just V Ltd. | Hospitality | 2017 |
| JW Boat Rental Ltd | Transport & logistics | 2023 |
| JW Cablejointing Ltd | Construction | 2017 |
| JW Driver(Uk) Ltd | Transport & logistics | 2018 |
| JW Education Ltd | Education | 2026 |
| JW Environmental Ltd | Professional & scientific | 2022 |
| JW Facades Ltd | Construction | 2023 |
| JWH Property Limited | Real estate | 2025 |
| Jwlplanthire Ltd | Administrative & support | 2025 |
| JWT Housing Ltd | Real estate | 2024 |
| K & a Tools Ltd | Wholesale & retail | 2006 |
| K & L Mobility Ltd | Professional & scientific | 2017 |
| K & R Engineering Limited | Wholesale & retail | 2005 |
| K J Communications Ltd | Administrative & support | 2007 |
| K Mullen Limited | Construction | 2017 |
| K Plant Hire and Welding Limited | Wholesale & retail | 2020 |
| K R Properties Limited | Construction | 2002 |
| K&K Investment Holdings Ltd | Real estate | 2023 |
| K.R.S Trading Limited | Wholesale & retail | 2017 |
| K.V. Safety Limited | Construction | 2009 |
| KAH Trading Ltd | Professional & scientific | 2019 |
| Kalentin Italia-Uk Ltd | Professional & scientific | 2014 |
| KAM Barber Ltd | Other services | 2023 |
| KAM Hair Style Ltd | Other services | 2026 |
| Kanatica Ltd | Transport & logistics | 2023 |
| Kandy Klub Coffee Bar Ltd | Hospitality | 2014 |
| Kapaya Care Limited | Health & social care | 2023 |
| KARA34 Limited | Hospitality | 2023 |
| Karoobar Wala Ltd | Real estate | 2021 |
| Kasper Eats Limited | Hospitality | 2023 |
| Katie Ellison Limited | Health & social care | 2016 |
| Katrina Consulting Ltd | Professional & scientific | 2025 |
| Kavija & Co Ltd | Real estate | 2025 |
| Kayndrew Properties Ltd | Real estate | 2025 |
| Kazmar Construction Ltd | Construction | 2024 |
| KB Evergreen Landscaping Ltd | Administrative & support | 2025 |
| Kcrd Bathroom Specialists Ltd | Construction | 2026 |
| KD Travel Ltd | Transport & logistics | 2025 |
| KDW Solutions Limited | Professional & scientific | 2019 |
| Keenans Installations Ltd | Construction | 2017 |
| Keith Johnson Consultancy Ltd | Information & communication | 2011 |
| Keli Evans Limited | Professional & scientific | 2018 |
| Kelzys Limited | Real estate | 2019 |
| Kenable Limited | Wholesale & retail | 2002 |
| Kenikse Yarns Limited | Manufacturing | 2024 |
| Keranov's Organics Limited | Wholesale & retail | 2022 |
| Kerfoot Metals Limited | Water & waste | 2011 |
| Kesinoto Group Ltd | Other services | 2019 |
| Kestrel Electrical Services Limited | Construction | 2016 |
| Keswick Healthcare Limited | Real estate | 2014 |
| Kettle Locum Limited | Health & social care | 2023 |
| Key Line Consulting Limited | Administrative & support | 2017 |