| Impact Control Systems Limited | Construction | 1991 |
| Impact Data Metrics Ltd | Information & communication | 2017 |
| Impact Electrical Services Ltd | Construction | 2017 |
| Impact Energy Limited | Construction | 2015 |
| Impact Fundraising Limited | Administrative & support | 2012 |
| Impact Marketing (Liverpool) Ltd | Professional & scientific | 2026 |
| Impact Medical Limited | Administrative & support | 2001 |
| Impact Plus Limited | Health & social care | 2025 |
| Impact Property (NW) Ltd | Real estate | 2005 |
| Impact Security Systems Ltd | Administrative & support | 2021 |
| Impact Services (Northern) Limited | Administrative & support | 2002 |
| Impact Signs & Design Limited | Manufacturing | 1999 |
| Impact Solutions PVT Ltd | Professional & scientific | 2022 |
| Impact Support Solutions Limited | Administrative & support | 2008 |
| Impact Vehicle Services Ltd | Administrative & support | 2021 |
| Impact Window Cleaning Limited | Administrative & support | 2014 |
| Impactful Advertising Limited | Professional & scientific | 2024 |
| Impacto Strategic Ltd | Education | 2019 |
| Impactt Properties Ltd. | Professional & scientific | 2014 |
| Impax Taxi Services Ltd | Transport & logistics | 2024 |
| Impeccable Interiors Ltd | Construction | 2022 |
| Impel Construction Limited | Construction | 2015 |
| Imperial Autos Ltd | Wholesale & retail | 2026 |
| Imperial BC Ltd | Administrative & support | 2024 |
| Imperial Buildings Apartments Management Company Ltd | Households | 2025 |
| Imperial Chef & Domestic Ltd | Hospitality | 2017 |
| Imperial Cleaning Services Limited | Administrative & support | 2025 |
| Imperial Event Planners Ltd | Hospitality | 2026 |
| Imperial LEE Properties Ltd | Real estate | 2024 |
| Imperial Logic Ltd | Professional & scientific | 2020 |
| Imperial Scaffolding Solutions Ltd | Construction | 2021 |
| Imperial Way Properties Limited | Real estate | 2002 |
| Imperioli Ltd | Administrative & support | 2023 |
| Imperion Events Services Ltd | Administrative & support | 2025 |
| Imperium Martial Arts Ltd | Other services | 2024 |
| Imperium Renewable Energy Ltd | Professional & scientific | 2019 |
| Impero Global Limited | Professional & scientific | 2025 |
| Impetus Business Intelligence Limited | Information & communication | 2024 |
| Implant Arch Limited | Health & social care | 2026 |
| IMPORT2019 Ltd | Wholesale & retail | 2025 |
| Impressions Screen Print Limited | Administrative & support | 2004 |
| Impropriety CIC | Arts & recreation | 2013 |
| Impulse Padel UK Ltd | Arts & recreation | 2025 |
| Impulso Hospitality Ltd | Wholesale & retail | 2025 |
| Impulso Music Ltd | Education | 2025 |
| IMR Heating & Plumbing Limited | Construction | 2014 |
| IMR Motor Solutions Ltd | Other services | 2017 |
| IMS Concierge Services Ltd | Professional & scientific | 2025 |
| IMS DRY Lining Limited | Construction | 2010 |
| IMS Facades Limited | Construction | 2015 |
| IMS Property Developments Ltd | Construction | 2017 |
| IMS Savvy Ltd | Information & communication | 2024 |
| Imza Homes Ltd | Real estate | 2019 |
| IN a BIT Tech Ltd | Information & communication | 2023 |
| IN Extensions Ltd | Wholesale & retail | 2024 |
| IN House Legal Support Limited | Professional & scientific | 2022 |
| IN Property NW Ltd | Real estate | 2025 |
| IN Retirement Inc Ltd | Other services | 2013 |
| IN Ruff Company Limited | Other services | 2023 |
| IN Sport Holdings Ltd. | Professional & scientific | 2016 |
| IN Step in Touch Ltd | Health & social care | 2015 |
| IN Tavola Italian Food & Wine Company Limited | Wholesale & retail | 2014 |
| IN the Clear Limited | Administrative & support | 2018 |
| IN the Here and NOW Ltd | Other services | 2020 |
| IN the NOW Psychology Ltd | Health & social care | 2019 |
| IN the Outside Ltd | Information & communication | 2023 |
| IN the Q Ltd | Administrative & support | 2015 |
| IN the Red Ltd | Information & communication | 2015 |
| IN Through Ltd | Other services | 2019 |
| IN Your Prime Ltd | Health & social care | 2025 |
| In-House Legal Solutions Limited | Professional & scientific | 2016 |
| In-Motion Facilities Management Ltd | Administrative & support | 2021 |
| In-Motion Hospitality & Events Ltd | Administrative & support | 2024 |
| In-Motion Property Group Ltd | Real estate | 2023 |
| In-Phase Training Limited | Education | 2006 |
| In-Style Kitchens & Bedrooms Ltd | Construction | 2013 |
| INA4 Media Limited | Professional & scientific | 2002 |
| Inc Digital Group Limited | Professional & scientific | 2025 |
| Inca Energy Ltd | Financial services | 2025 |
| Ince Blundell Garages Limited | Wholesale & retail | 2003 |
| Ince Digital Ltd | Wholesale & retail | 2019 |
| Ince Property Lettings Limited | Real estate | 2012 |
| Ince Services NW Ltd | Construction | 2026 |
| Incendia Card Services Limited | Financial services | 2014 |
| Incendia Card Solutions Limited | Financial services | 2014 |
| Incendia Group Limited | Professional & scientific | 2009 |
| Incendia Payment Solutions Limited | Financial services | 2009 |
| Incendia Professional Services Limited | Administrative & support | 2011 |
| Inch Group Limited | Manufacturing | 2019 |
| Incipit Limited | Financial services | 2004 |
| Incline Financial Ltd | Professional & scientific | 2024 |
| Inclus-Ability North West CIC | Arts & recreation | 2025 |
| Inclusion and Diversity in Nuclear | Professional & scientific | 2021 |
| Inclusion Compass Limited | Education | 2026 |
| Inclusive Companies Limited | Other services | 2018 |
| Inclusive Pathways Liverpool CIC | Education | 2025 |
| Incocharge Limited | Wholesale & retail | 2025 |
| Income Plus Enterprises (UK) Ltd | Administrative & support | 2018 |
| Income Plus Racing Limited | Arts & recreation | 2018 |
| Income Point Ltd | Administrative & support | 2024 |