| Instant Eco Homes Contracting Ltd | Construction | 2018 |
| Instantasp Limited | Information & communication | 2003 |
| Insure Savvy Limited | Financial services | 2025 |
| Intago Limited | Professional & scientific | 2026 |
| Intecho Limited | Information & communication | 2010 |
| Interesting Products Ltd | Wholesale & retail | 2003 |
| Interflex Marketing Associates Limited | Wholesale & retail | 1986 |
| Interise Media Ltd | Professional & scientific | 2026 |
| Interna Bespoke Flooring Ltd | Construction | 2024 |
| International Association for Body Dysmorphic Disorder CIC | Information & communication | 2025 |
| International Fire Protection Ltd | Professional & scientific | 2022 |
| Intertech Asia Limited | Information & communication | 2015 |
| Inverjack Ltd | Administrative & support | 2010 |
| Investment Works Limited | Extraterritorial | 2018 |
| Invive Business Strategists Limited | Administrative & support | 2015 |
| IQ Fitness & Strength Limited | Arts & recreation | 2020 |
| IQ Freight and Logistics Ltd | Transport & logistics | 2025 |
| Irlam Investments Limited | Construction | 2014 |
| Irlam Properties Group Holdings Limited | Financial services | 2023 |
| Irlam Properties Limited | Real estate | 2008 |
| Irlams (Estate Agents) Ltd | Real estate | 2013 |
| Island Sailing Limited | Arts & recreation | 2011 |
| Ites Youth Initiative C.I.C. | Health & social care | 2022 |
| ITMIGR8 Limited | Professional & scientific | 2020 |
| Ivape Global Ltd | Wholesale & retail | 2021 |
| J & R Bell Limited | Agriculture & fishing | 2015 |
| J E Root Limited | Arts & recreation | 2013 |
| J L Carter and Sons Limited | Real estate | 2014 |
| J.B. Trucking Limited | Real estate | 1980 |
| J.P. Unterhalter Limited | Real estate | 2006 |
| JA Mcbrowcor Consulting Ltd | Professional & scientific | 2018 |
| Jackson Grove Limited | Real estate | 2025 |
| Jackson Trading International Ltd | Professional & scientific | 2018 |
| Jake's Global Trading Ltd | Wholesale & retail | 2026 |
| James Jackson Roofing Limited | Construction | 2026 |
| James James of West Kirby Limited | Manufacturing | 2006 |
| James Mooney Ltd | Professional & scientific | 2019 |
| Jamm Real State Ltd | Construction | 2024 |
| Jampot Investments Limited | Financial services | 2023 |
| JAS North West Limited | Financial services | 2023 |
| JAS Plumbing & Heating Limited | Construction | 2006 |
| JAY Asset Management Limited | Financial services | 2025 |
| JB TEC Consultants Ltd | Information & communication | 2026 |
| Jbejee Ltd | Administrative & support | 2025 |
| JC Advisory Services Ltd | Professional & scientific | 2022 |
| JC Buttler Promotions Limited | Arts & recreation | 2013 |
| JDW Property Services Ltd | Administrative & support | 2025 |
| Jemswise Limited | Health & social care | 2005 |
| Jest NW Ltd | Wholesale & retail | 2020 |
| Jesudason Consulting Ltd | Administrative & support | 2017 |
| Jetty Hospitality Limited | Real estate | 2020 |
| JF Property Developments Holdings Ltd | Construction | 2025 |
| JI North West Limited | Real estate | 2015 |
| Jinsuns Limited | Wholesale & retail | 2004 |
| JJ CLO Limited | Wholesale & retail | 2025 |
| Jjac Holdings Ltd | Financial services | 2026 |
| JKM 2013 Ltd | Hospitality | 2013 |
| JMT Advisory Ltd | Professional & scientific | 2025 |
| JMT Engineering and Manufacturing Search Ltd | Administrative & support | 2026 |
| JMT Engineering Recruitment Limited | Administrative & support | 2019 |
| JN Investments Ltd | Real estate | 2011 |
| JOB Consultancy Ltd | Administrative & support | 2012 |
| John J Paul Ltd | Information & communication | 2019 |
| John Ollier Refrigeration Limited | Professional & scientific | 2018 |
| John Shaw Equestrian Limited | Agriculture & fishing | 2007 |
| Johncaspar Properties Ltd | Real estate | 2018 |
| Johnson James Studios Ltd | Professional & scientific | 2022 |
| Johnson Sharp Limited | Real estate | 2002 |
| Johnson Sunblinds Limited | Construction | 2016 |
| Johnsons Specialist Services Limited | Transport & logistics | 2003 |
| Johnsons Workplace Limited | Transport & logistics | 2018 |
| JON Worsnop Property Ltd | Real estate | 2020 |
| Jones Davey Search & Selection Limited | Administrative & support | 2006 |
| Jones Tarr Developments Limited. | Construction | 1989 |
| Journeys by JET Ltd | Administrative & support | 2018 |
| Jp-Finance (UK) Ltd | Financial services | 2014 |
| JPC Property Holdings Ltd | Real estate | 2023 |
| JRL Agencies Ltd | Wholesale & retail | 2019 |
| JRS Financial 2020 Ltd | Professional & scientific | 2022 |
| JS Equine Management Limited | Agriculture & fishing | 2008 |
| JT HR Solutions Limited | Other services | 2018 |
| JTX2 Ltd | Real estate | 2022 |
| Just Colour Ltd | Wholesale & retail | 2017 |
| Just Nothing Ltd | Information & communication | 2016 |
| Just P4YROLL Ltd | Financial services | 2025 |
| Just P4YROLLUK Ltd | Financial services | 2025 |
| Just “B” Sweet Ltd | Manufacturing | 2026 |
| JVX Projects Limited | Professional & scientific | 2015 |
| JY Coaching & Consultancy Ltd | Professional & scientific | 2025 |
| K C Driving School Ltd | Education | 2019 |
| K Hill Property Limited | Real estate | 2024 |
| K-Town Films Limited | Information & communication | 2022 |
| K.L. (Knutsford) Ltd | Real estate | 2024 |
| K.Y.T. Properties Limited | Real estate | 2002 |
| K3DP Ltd | Manufacturing | 2025 |
| Kaan Investments Ltd | Real estate | 2019 |
| Kage Trading Limited | Manufacturing | 2018 |
| Kale Logistics Ltd | Water & waste | 2025 |
| KAM Group Holdings 2020 Limited | Financial services | 2020 |
| KAM Group Holdings Limited | Construction | 2018 |