| Indulge Desserts Skelmersdale Limited | Wholesale & retail | 2025 |
| Infinity Productions Pro Ltd | Information & communication | 2021 |
| Innox Innovations Limited | Extraterritorial | 2015 |
| Innox Trading Limited | Wholesale & retail | 2010 |
| Inspire Graphic Design Limited | Administrative & support | 2003 |
| Inspire Insulation Limited | Construction | 2012 |
| Inspire Strategy Group Ltd | Administrative & support | 2024 |
| Integrate Pro-Tech Ltd | Information & communication | 2023 |
| Interex Global Ltd | Wholesale & retail | 2018 |
| Intopnic Limited | Wholesale & retail | 2025 |
| Intrepidus Sportswear Ltd | Wholesale & retail | 2025 |
| Introcon Ltd | Construction | 2025 |
| Investa Pals Limited | Construction | 2018 |
| Inzight Building Works Ltd | Construction | 2025 |
| IQ House Ltd | Construction | 2017 |
| IR Landscape and Design Ltd | Administrative & support | 2022 |
| Ironstone Acquisitions Ltd | Real estate | 2026 |
| Irwell Rail Ltd | Professional & scientific | 2013 |
| IT Managed Limited | Information & communication | 2007 |
| IT Managed Services Limited | Information & communication | 2007 |
| Italo Pizza Limited | Hospitality | 2022 |
| ITR Management Holdings Limited | Wholesale & retail | 2010 |
| ITR Management Solutions Limited | Financial services | 2011 |
| ITR Property Management Limited | Real estate | 2017 |
| ITS Management Services Limited | Construction | 2016 |
| IVY Coorp Trade Ltd | Construction | 2024 |
| J & K Confectionery Limited | Wholesale & retail | 2005 |
| J & S Steel Decking Ltd | Construction | 2009 |
| J & T Rigby Limited | Administrative & support | 2016 |
| J Ashurst Properties Ltd | Real estate | 2025 |
| J Russell Building Contractor Limited | Construction | 2013 |
| J Tyrer Building & Maintenance Ltd | Construction | 2025 |
| J Whitfield Groundworks & Civil Engineering Limited | Construction | 2012 |
| J Whitfield Holdings Ltd | Construction | 2018 |
| J.K.Middleton Surgical Engineering Ltd | Manufacturing | 2017 |
| J.L. & Co Enterprise Limited | Transport & logistics | 2017 |
| J.L. Bookkeeping and Advice Services Ltd | Professional & scientific | 2016 |
| J.L. Pisces & Co Limited | Transport & logistics | 2022 |
| J.Moran Consulting Limited | Administrative & support | 2014 |
| Jackson's Detailing Ltd | Wholesale & retail | 2025 |
| Jacksons Property Management Ltd | Households | 2021 |
| Jagg Care Limited | Health & social care | 2016 |
| Jaiguru Limited | Health & social care | 2015 |
| James Clifford Projects Ltd | Real estate | 2019 |
| James MC Transport Ltd | Transport & logistics | 2024 |
| Jane Green Aesthetics Limited | Health & social care | 2016 |
| Jcco Healthcare Limited | Financial services | 2020 |
| Jceps Independent Social Work Consultancy Ltd | Health & social care | 2024 |
| JCT4 Automotive Limited | Wholesale & retail | 2016 |
| JDH Survey & Engineering Ltd | Professional & scientific | 2024 |
| JDM Contracts Limited | Construction | 2000 |
| JDM Joinery Ltd | Construction | 2007 |
| Jerich UK Ltd | Transport & logistics | 2003 |
| Jessol Consulting Limited | Professional & scientific | 2025 |
| JET Document Storage Limited | Transport & logistics | 2005 |
| JJM TM Ltd | Construction | 2018 |
| JJS Hospitality Limited | Hospitality | 2025 |
| JL Couriers Limited | Transport & logistics | 2025 |
| JLJ Machining Limited | Professional & scientific | 2022 |
| JM Electrical (Wigan) Limited | Construction | 2004 |
| JMO Sports Limited | Arts & recreation | 2010 |
| JMT Telecommunications Ltd | Information & communication | 2023 |
| JN Developments & Facility Management Ltd | Real estate | 2025 |
| JN Sports Chorley Limited | Arts & recreation | 2025 |
| JN Sports Coaching Ltd | Education | 2017 |
| JN Sports Events Ltd | Arts & recreation | 2021 |
| JNM Exhibition Services Limited | Construction | 2003 |
| Johnsons & Sons NW Ltd | Real estate | 2014 |
| Jonas Fish Ltd | Wholesale & retail | 2021 |
| Joseph and Sons Solution Ltd | Construction | 2022 |
| JP Gray Builders Ltd | Construction | 2008 |
| JP TM Services Ltd | Construction | 2019 |
| JPA Van Services Ltd | Transport & logistics | 2025 |
| JPC Engineering Services Limited | Professional & scientific | 2017 |
| JPR Packaged Deals Ltd | Administrative & support | 2025 |
| Jprsheetmetal Ltd | Manufacturing | 2025 |
| JTG Civils Limited | Construction | 2024 |
| Just Tyres Commercial (NW) Ltd | Wholesale & retail | 2020 |
| K & S Property Maintenance Ltd | Education | 2025 |
| K Abram Group Limited | Financial services | 2016 |
| K F Electrics Ltd | Construction | 2012 |
| K Rooney Properties Ltd | Real estate | 2020 |
| K Smith Maintenance Ltd | Construction | 2025 |
| K&Baca Logistic Ltd | Transport & logistics | 2022 |
| K&K Fleet Services Ltd | Administrative & support | 2025 |
| K-Line Express Ltd | Transport & logistics | 2019 |
| Kabco Group Ltd | Manufacturing | 2015 |
| Kadak Limited | Extraterritorial | 2024 |
| Kailum Wind Ltd | Information & communication | 2019 |
| Kaiser Transport NW Limited | Transport & logistics | 2021 |
| Kaizen (Design & Project Management) Ltd | Construction | 2020 |
| Kaizen Office Limited | Information & communication | 2020 |
| Kalvin Trans Ltd | Transport & logistics | 2024 |
| Kamden 4 Transport Ltd | Transport & logistics | 2020 |
| Kammy Fast Food Ltd | Hospitality | 2025 |
| Karl Plumbing and Heating Limited | Construction | 2020 |
| Karl Vella (Deeside) Ltd | Wholesale & retail | 2014 |
| Karl Vella Autobody Repairs (Preston) Limited | Wholesale & retail | 1999 |
| Karl Vella Autobody Repairs (Southport) Limited | Wholesale & retail | 1994 |
| Karl Vella Autobody Repairs Limited | Wholesale & retail | 1994 |