| Hopwood Corporation Limited | Health & social care | 2006 |
| Hopwood Electrical Services Limited | Construction | 2002 |
| Hopwood Holdings Ltd | Real estate | 2022 |
| Hopwood Park Cafe Ltd | Hospitality | 2014 |
| Hopwood Park Pre-School Playgroup CIC | Education | 2018 |
| Hopwood Roofing and Construction Ltd | Construction | 2017 |
| Horrox,Cross and Wilkinson Limited | Financial services | 1965 |
| Hot Vindaloo Ltd | Hospitality | 2020 |
| Hotel Management Support Ltd | Hospitality | 2026 |
| House of Adalja Limited | Wholesale & retail | 2006 |
| House of Hoban Limited | Manufacturing | 2003 |
| House of Linn Ltd | Other services | 2006 |
| HQ Sport Limited | Education | 2022 |
| Hub Caps Pro Ltd. | Wholesale & retail | 2014 |
| Hubert Smolarek Transport Ltd. | Wholesale & retail | 2014 |
| I & L Developments Ltd | Real estate | 2026 |
| I B Holdings Limited | Financial services | 2006 |
| IAN Barker & Co. Limited | Wholesale & retail | 1964 |
| IB TEC Wholesale Ltd | Wholesale & retail | 2021 |
| Ideal Lawns Ltd | Administrative & support | 2020 |
| Ignite Sports and Well-Being Ltd | Health & social care | 2020 |
| IGV Ltd | Extraterritorial | 2005 |
| IK Packaging Ltd | Wholesale & retail | 2024 |
| Ikonic North West Limited | Professional & scientific | 2022 |
| Ikonic Renewables Limited | Energy | 2024 |
| Ikonic Technology Employee Ownership Trustee Limited | Professional & scientific | 2023 |
| Ikonic Technology Holdings Limited | Information & communication | 2016 |
| Ikonic Technology Limited | Information & communication | 2008 |
| IL Vecchio (Rochdale) Limited | Hospitality | 2015 |
| Illucio Ltd | Manufacturing | 2015 |
| Ilumi Signs & Print Ltd | Manufacturing | 2023 |
| Imagesbylumina Ltd | Professional & scientific | 2020 |
| Imdh Consultancy Ltd | Professional & scientific | 2026 |
| Imech Industrial Solutions Ltd | Professional & scientific | 2019 |
| Imli Heywood Ltd | Hospitality | 2022 |
| Imperiontech Limited | Information & communication | 2025 |
| Impex Essentials Limited | Wholesale & retail | 2019 |
| Impm-Services Ltd | Professional & scientific | 2026 |
| IN Charge Services Ltd | Extraterritorial | 2021 |
| IN Your Ears Music | Information & communication | 2021 |
| Independent Country Evidence Research Ltd | Professional & scientific | 2026 |
| Infixio Ltd | Information & communication | 2025 |
| Ingham Pritchard Associates Limited | Construction | 2025 |
| Ingham Services Limited | Administrative & support | 2002 |
| Innosco International & Co Ltd | Wholesale & retail | 2025 |
| Inovah Ltd | Wholesale & retail | 2026 |
| INR Consultants Ltd | Construction | 2022 |
| Insight Solutions Pro Ltd | Professional & scientific | 2025 |
| Inspired Drinks Distribution Ltd | Wholesale & retail | 2023 |
| Inspired Lighting Limited | Wholesale & retail | 2006 |
| Instant Payment Solutions Ltd | Wholesale & retail | 2026 |
| Insulation Manufacturers Association Limited | Other services | 1978 |
| Integrated Global Vision Limited | Administrative & support | 2004 |
| International Consultancy Services (M.East/Asia) Ltd | Other services | 2017 |
| Intricate Interiors Ltd | Construction | 2019 |
| INX Europe Limited | Manufacturing | 2004 |
| INX International UK Limited | Manufacturing | 1992 |
| IPK Solutions Limited | Wholesale & retail | 2023 |
| Irfan LAL Ltd | Wholesale & retail | 2025 |
| Isar Engineering Limited | Administrative & support | 2006 |
| Iseeu Cctv Ltd | Administrative & support | 2016 |
| Ishaak Care Limited | Health & social care | 2022 |
| Isolate Electrical Ltd | Construction | 2022 |
| Isolate Electrical Solutions Ltd | Construction | 2018 |
| Ital Holdings (UK) Ltd | Financial services | 2015 |
| Ital Holdings Management Limited | Financial services | 2022 |
| Ital Logistics Limited | Transport & logistics | 2000 |
| Ital Transport (UK) Limited | Transport & logistics | 2021 |
| ITD Global Topco Limited | Financial services | 2022 |
| ITS Marketplace Ltd | Wholesale & retail | 2025 |
| Iulya Trans Limited | Transport & logistics | 2015 |
| Iustin Vasang Ltd | Transport & logistics | 2017 |
| Ivna Ltd | Wholesale & retail | 2025 |
| IYI Catering Ltd | Hospitality | 2026 |
| J + S Inter Ltd | Wholesale & retail | 2009 |
| J Dreams Ltd | Wholesale & retail | 2025 |
| J J Ceilings Limited | Construction | 2026 |
| J Lewis & Co Limited | Real estate | 2002 |
| J&L Project Solutions Ltd | Professional & scientific | 2025 |
| J.& E.Fabrics Limited | Professional & scientific | 1951 |
| J.C. Drylining (Lancs) Limited | Construction | 2005 |
| J.H Home Construction Ltd | Construction | 2024 |
| J.H. Hussey (Construction) Limited | Construction | 1978 |
| J.L.H. Properties (North West) Ltd | Real estate | 2017 |
| J.Lewis & Co.(Manchester)Limited | Wholesale & retail | 1946 |
| J.M. Aluminium Limited | Manufacturing | 2017 |
| J.P.L Plumbing and GAS Limited | Construction | 2020 |
| JAC Specialst Services Limited | Professional & scientific | 2025 |
| Jacko's Online Ltd | Arts & recreation | 2023 |
| Jacob Roman Limited | Wholesale & retail | 2026 |
| Jade Rabbit Crystals & Crafts Ltd | Wholesale & retail | 2024 |
| Jaguar PAW Properties Ltd | Real estate | 2022 |
| Jain Medics Ltd | Health & social care | 2013 |
| James Hartley (Scrap Metal) Limited | Manufacturing | 1966 |
| Jamie Diamond Transport & Logistics Limited | Transport & logistics | 2016 |
| Jammy Holdings Limited | Real estate | 2016 |
| Jaylyn Ltd | Professional & scientific | 2010 |
| JDA Groundworks Limited | Administrative & support | 2016 |
| Jdmtrackattack Ltd | Administrative & support | 2024 |
| Jeno Floral Ltd. | Wholesale & retail | 2006 |