| Imminent Realty Limited | Professional & scientific | 2020 |
| Imminent Realty Property Management Ltd | Real estate | 2025 |
| Immobilien Engler Limited | Administrative & support | 2008 |
| Immora Limited | Administrative & support | 2008 |
| Immortal Humans CIC | Education | 2024 |
| Immortal MMA Coleshill Ltd | Arts & recreation | 2025 |
| Immovable Estates Ltd | Real estate | 2023 |
| Immunepeptides Limited | Professional & scientific | 2008 |
| Immunogen Europe Limited | Professional & scientific | 2005 |
| IMN Investments Limited | Real estate | 2020 |
| Imobile World Ltd | Wholesale & retail | 2019 |
| Imotiv Limited | Information & communication | 2020 |
| IMP Systems Technology Limited | Professional & scientific | 2017 |
| Imp-Tech Solutions Limited | Manufacturing | 2014 |
| Impact 4LIFE Well-Being CIC | Other services | 2019 |
| Impact Aerial Ltd. | Manufacturing | 2018 |
| Impact Architectural Systems Ltd | Manufacturing | 2024 |
| Impact Architectural Systems Trading Ltd | Manufacturing | 2026 |
| Impact Beauty Ltd | Other services | 2020 |
| Impact Champions Ltd | Education | 2025 |
| Impact Fireworks Ltd | Wholesale & retail | 2012 |
| Impact Fostering Ltd | Health & social care | 2023 |
| Impact Futures Group Ltd | Education | 2016 |
| Impact G and G (Holdings) Ltd | Manufacturing | 2023 |
| Impact Gym Oldbury Ltd | Arts & recreation | 2025 |
| Impact Metrix Ltd | Information & communication | 2026 |
| Impact Network Ltd | Professional & scientific | 2024 |
| Impact Repair Centre Limited | Wholesale & retail | 1986 |
| Impact.Me Group Limited | Professional & scientific | 2018 |
| Impactful Communities Limited | Professional & scientific | 2022 |
| Impacts Management Ltd | Information & communication | 2025 |
| Impactvisible Ltd. | Professional & scientific | 2006 |
| Impak Housing Ltd | Health & social care | 2022 |
| Impala Holdings Limited | Financial services | 2007 |
| Impeccable Foods & Catering Ltd | Hospitality | 2026 |
| Impeccable Hardware Limited | Wholesale & retail | 2025 |
| Impeccable Results Ltd | Administrative & support | 2019 |
| Imperator Perfumes Ltd | Manufacturing | 2026 |
| Imperfections by Jenna Chantal Ltd | Other services | 2020 |
| Imperial Auto Planet Ltd | Wholesale & retail | 2022 |
| Imperial Building & Properties Ltd | Construction | 2020 |
| Imperial Business Management Services Ltd | Professional & scientific | 2014 |
| Imperial Chaunsa Ltd | Wholesale & retail | 2026 |
| Imperial Clothing Ltd | Wholesale & retail | 2019 |
| Imperial English UK Ltd | Education | 2003 |
| Imperial Finance Solutions Limited | Financial services | 2025 |
| Imperial Gadgets Limited | Wholesale & retail | 2024 |
| Imperial GAS Training Services Ltd | Professional & scientific | 2021 |
| Imperial Green Systems Limited | Construction | 2024 |
| Imperial Grooming House Ltd | Other services | 2025 |
| Imperial Home & Hardware Limited | Other services | 2023 |
| Imperial Home Management Ltd | Real estate | 2020 |
| Imperial Home Services Limited | Administrative & support | 2022 |
| Imperial Homeware London Limited | Wholesale & retail | 2014 |
| Imperial Housing (West Midlands) Limited | Households | 2024 |
| Imperial K9 Security Services Ltd | Administrative & support | 2024 |
| Imperial Lane Couriers Ltd | Transport & logistics | 2026 |
| Imperial Lash Ltd. | Wholesale & retail | 2015 |
| Imperial Lettings & Sales (Shropshire) Limited | Real estate | 2008 |
| Imperial Living (Birmingham) Ltd | Real estate | 2025 |
| Imperial Logistics Ltd | Transport & logistics | 2021 |
| Imperial Motor Sales Ltd | Wholesale & retail | 2017 |
| Imperial Motors Midland Ltd | Wholesale & retail | 2025 |
| Imperial Packaging Solution T/A the Packaging Solution Limited | Manufacturing | 2021 |
| Imperial Press UK Ltd | Education | 2015 |
| Imperial Printing Services Limited | Manufacturing | 2022 |
| Imperial Privilege Limited | Transport & logistics | 2026 |
| Imperial Properties (Birmingham) Ltd | Real estate | 2024 |
| Imperial Properties(Uk) Ltd | Real estate | 2025 |
| Imperial Residential Building & Roofing Limited | Construction | 2006 |
| Imperial Sales (Shropshire) Limited | Professional & scientific | 2010 |
| Imperial Security Solutions Ltd | Administrative & support | 2021 |
| Imperial Specialist Cars Ltd | Wholesale & retail | 2020 |
| Imperial Supply Ltd | Wholesale & retail | 2024 |
| Imperial Tongseoi Limited | Hospitality | 2024 |
| Imperial Trucking Ltd | Transport & logistics | 2022 |
| Imperial World Foods Limited | Wholesale & retail | 2023 |
| Imperial Yard Limited | Manufacturing | 2015 |
| Imperian Limited | Wholesale & retail | 2024 |
| Imperio Electrical Solutions Ltd | Construction | 2022 |
| Imperio Management Limited | Real estate | 2022 |
| Imperium Car Hire Ltd | Administrative & support | 2025 |
| Imperium Realty Ltd | Real estate | 2025 |
| Impero London Limited | Wholesale & retail | 2006 |
| Impex Communication Ltd | Information & communication | 2011 |
| Impex Furniture UK Limited | Wholesale & retail | 2023 |
| Implantcast UK Limited | Wholesale & retail | 2012 |
| Implantly Ltd | Health & social care | 2021 |
| Importante Services Ltd | Public administration | 2020 |
| Importiva Ltd | Transport & logistics | 2023 |
| Imposter PUB Group Limited | Hospitality | 2022 |
| Impregnation Solutions Limited | Manufacturing | 2016 |
| Imprensa Limited | Administrative & support | 2008 |
| Impress Branding Limited | Manufacturing | 2024 |
| Impress Healthcare Ltd | Health & social care | 2015 |
| Impressions Beauty Studio (UK) Limited | Other services | 2012 |
| Impressive Ltd | Construction | 2025 |
| Impresso Coffee Lounge Ltd | Hospitality | 2023 |
| Improbable Fiction Limited | Arts & recreation | 2015 |
| Improving Healthcare Solutions Ltd | Health & social care | 2021 |