| Imarx Digital Solutions Ltd | Professional & scientific | 2025 |
| IMC Business Growth Limited | Information & communication | 2008 |
| IMC Developments Ltd | Construction | 2022 |
| IMC Optometry Ltd | Health & social care | 2022 |
| IMC Property Management Limited | Real estate | 2022 |
| Imchemeng Limited | Professional & scientific | 2018 |
| Imck Ltd | Wholesale & retail | 2023 |
| Imco Director Limited | Professional & scientific | 2002 |
| Imco Secretary Limited | Professional & scientific | 2002 |
| Imco Shareholder (1) Limited | Professional & scientific | 2003 |
| Imco Shareholder (2) Limited | Professional & scientific | 2003 |
| Imcow Ltd | Other services | 2022 |
| Imedia Trades Ltd | Construction | 2022 |
| IMF Commercial Ltd | Real estate | 2022 |
| Imf&H Ltd | Real estate | 2022 |
| IMI (Yorkshire) LLP | | 2011 |
| IMI Training & Compliance Limited | Professional & scientific | 2010 |
| Imitating the Dog International Ltd | Arts & recreation | 2022 |
| Imjretails Limited | Wholesale & retail | 2022 |
| Imlah Communications Ltd | Professional & scientific | 2023 |
| Imlah Consultancy Limited | Construction | 2023 |
| Immense Group Ltd | Construction | 2025 |
| Immerseum Ltd | Information & communication | 2023 |
| Immersio Travel Limited | Administrative & support | 2025 |
| Immersive Mobile Designs PVT Ltd | Information & communication | 2024 |
| Immigration Legal Advice Centre C.I.C. | Professional & scientific | 2011 |
| Immiuk Limited | Professional & scientific | 2025 |
| Immortal Bloom CIC | Professional & scientific | 2021 |
| Immortal Engines Ltd | Wholesale & retail | 2026 |
| Immortal Fight Ltd | Education | 2022 |
| Immortal Martial Arts Ltd | Arts & recreation | 2022 |
| Immortal Ninja Ltd | Education | 2022 |
| Immsoc Ltd | Health & social care | 2025 |
| Immutably Storage Ltd | Information & communication | 2025 |
| Imnioz Ltd | Professional & scientific | 2018 |
| Imogen Group Limited | Extraterritorial | 2016 |
| Imolites Yorkshire CIC | Other services | 2023 |
| Imox Limited | Administrative & support | 2015 |
| IMP Media Limited | Information & communication | 2006 |
| Impact (North) Limited | Health & social care | 2013 |
| Impact Capital Investments Ltd | Administrative & support | 2025 |
| Impact Construction Solutions Limited | Wholesale & retail | 2023 |
| Impact Ctmd Ltd | Real estate | 2016 |
| Impact Diamond Tools Limited | Extraterritorial | 1988 |
| Impact Direct UK Ltd | Wholesale & retail | 2016 |
| Impact Garments Trading UK Ltd | Wholesale & retail | 2026 |
| Impact Healthcare UK Ltd | Administrative & support | 2022 |
| Impact Immersive Ltd | Construction | 2019 |
| Impact Investment Property Ltd | Real estate | 2018 |
| Impact ME Properties Ltd | Real estate | 2026 |
| Impact Mechanical Ltd | Construction | 2018 |
| Impact Minds Limited | Health & social care | 2019 |
| Impact People Management Ltd | Administrative & support | 2019 |
| Impact Plastics & Coatings Ltd | Construction | 2019 |
| Impact Property & Developments Ltd | Real estate | 2024 |
| Impact Scaffolding (Yorkshire) Ltd | Construction | 2023 |
| Impact Support Services Ltd | Health & social care | 2020 |
| Impactly Group Ltd | Hospitality | 2025 |
| Impactxp Group Ltd | Financial services | 2026 |
| Impala Accountancy Limited | Professional & scientific | 2018 |
| Impala Solutions Limited | Administrative & support | 2021 |
| Impart Limited | Professional & scientific | 2012 |
| Imperatus Games Ltd | Wholesale & retail | 2025 |
| Imperial Accountancy Limited | Extraterritorial | 2014 |
| Imperial Bars Limited | Hospitality | 2018 |
| Imperial Consulting and Technology Company Limited | Information & communication | 2012 |
| Imperial Designs to Build Ltd | Manufacturing | 2026 |
| Imperial Mane Ltd | Wholesale & retail | 2025 |
| Imperial Network Global CIC | Health & social care | 2025 |
| Imperial Personal Management Limited | Professional & scientific | 2007 |
| Imperial Search Consulting Ltd | Administrative & support | 2015 |
| Imperium Consultancy Group Ltd | Construction | 2017 |
| Imperium Investments and Holding Company Limited | Financial services | 2025 |
| Impero (Development Management) Limited | Real estate | 2015 |
| Impetus Enclosure Systems Limited | Manufacturing | 2002 |
| Impex Developments Limited | Construction | 2018 |
| Impex Holdings 2025 Limited | Financial services | 2025 |
| Impex Parts Limited | Wholesale & retail | 1998 |
| Implant Planning Excellence Ltd | Health & social care | 2024 |
| Implexus Limited | Arts & recreation | 2015 |
| Import Nation 2 Ltd | Information & communication | 2024 |
| Import Nation 3 Ltd | Information & communication | 2024 |
| Import Nation 4 Ltd | Information & communication | 2024 |
| Import Nation Ltd | Information & communication | 2024 |
| Impression Clothing Limited | Wholesale & retail | 2016 |
| Impression Made Ltd | Professional & scientific | 2026 |
| Impression Works Limited | Manufacturing | 2013 |
| Impressive Interiors Limited | Wholesale & retail | 2019 |
| Imprint Haven Solutions Limited | Administrative & support | 2025 |
| Improvia Ltd | Professional & scientific | 2025 |
| Impulse Design Ltd | Information & communication | 2025 |
| Impulse Products & Services Limited | Extraterritorial | 2012 |
| Imran and Isma Limited | Health & social care | 2018 |
| Imrex Limited | Wholesale & retail | 2023 |
| IMS Business Solutions Limited | Professional & scientific | 2003 |
| IMS Robotics UK Limited | Administrative & support | 2021 |
| Imsgroup Europe Limited | Professional & scientific | 2015 |
| Imstar Properties Ltd | Real estate | 2025 |
| Imtd Tax Services Ltd | Administrative & support | 2017 |
| IMZ Investments Midlands Limited | Financial services | 2025 |