| Imjustbrighton Ltd | Professional & scientific | 2025 |
| Immersia Experiences Ltd | Arts & recreation | 2025 |
| Immicol Ltd | Extraterritorial | 2024 |
| Immigration Guidance Services Ltd | Professional & scientific | 2024 |
| Immiko.Global Holdings Ltd | Manufacturing | 2026 |
| Immo-Invest 55 L.P. | | 2018 |
| Immunoderm Ltd | Health & social care | 2023 |
| Impactlink Research & Innovation Ltd | Information & communication | 2026 |
| Impakt Haus Ltd | Professional & scientific | 2026 |
| Imperial Insight Ltd | Information & communication | 2023 |
| Import Trade Ltd | Manufacturing | 2025 |
| Imprint Advertising Ltd | Manufacturing | 2024 |
| Improving Business Ltd | Information & communication | 2025 |
| IMU International Marketing Co., Ltd | Wholesale & retail | 2026 |
| IMZ Cosmetics Limited | Wholesale & retail | 2025 |
| In-Harmony Education Ltd | Information & communication | 2018 |
| Inara Noir Ltd | Wholesale & retail | 2025 |
| Inarker Ltd | Wholesale & retail | 2025 |
| Inaverse Ltd | Manufacturing | 2025 |
| Inaya Corp Limited | Information & communication | 2026 |
| Inchoi Media Limited | Wholesale & retail | 2025 |
| Inclusive Living NW Ltd | Real estate | 2025 |
| Incorde Limited | Wholesale & retail | 2025 |
| Indeed Cozy Ltd | Information & communication | 2025 |
| Indi Products Limited | Manufacturing | 2026 |
| Indie Game Vault Ltd | Wholesale & retail | 2025 |
| Indigo Brands Limited | Wholesale & retail | 2025 |
| Indigo Pro Cleaning Ltd | Administrative & support | 2026 |
| INDIGO99 Solution Ltd | Administrative & support | 2026 |
| Induolama Europe Potash Co., Ltd | Extraterritorial | 2021 |
| Indus Travels Ltd | Administrative & support | 2026 |
| Infiine Ltd | Wholesale & retail | 2026 |
| Infinite Lightst Media Ltd | Wholesale & retail | 2026 |
| Infinite Payment Group Ltd | Wholesale & retail | 2025 |
| Infinite Tech Traders Ltd. | Wholesale & retail | 2024 |
| Infinite Thunder Network Technology Co., Ltd | Wholesale & retail | 2025 |
| Infinite Universe Technology Co., Ltd | Wholesale & retail | 2025 |
| Infinity Global Trading Ltd | Administrative & support | 2019 |
| Infinity Illume Ltd | Real estate | 2025 |
| Infinity Incorporation Ltd | Other services | 2018 |
| Infinity Investor Services Ltd | Administrative & support | 2018 |
| Infinova Global Ltd | Information & communication | 2025 |
| INFL8 Holdings Ltd | Financial services | 2025 |
| Informationguardian Limited | Information & communication | 2019 |
| Infrapf Limited | Financial services | 2016 |
| Infunity State Ltd | Information & communication | 2026 |
| Infusion (Leominster) Limited | Wholesale & retail | 2024 |
| Initial Technology Ltd | Wholesale & retail | 2023 |
| Initiatv Consulting Limited | Information & communication | 2022 |
| Inker Trading Ltd | Wholesale & retail | 2026 |
| Inklings and Scribbles Limited | Wholesale & retail | 2025 |
| Inkscroll Journeys Ltd | Wholesale & retail | 2025 |
| Inkster Studios Ltd | Professional & scientific | 2026 |
| Inn Control Accountancy Solutions Limited | Professional & scientific | 2020 |
| Inn Control Business Solutions Limited | Administrative & support | 2017 |
| Innaco Ltd. | Transport & logistics | 2014 |
| Inner Mongolia Yiyue Trading Co., Ltd | Wholesale & retail | 2025 |
| Innerbiz Ltd | Information & communication | 2024 |
| Innercent Apps Ltd | Information & communication | 2025 |
| Innermost Mind Limited | Health & social care | 2025 |
| Innex Attachment Ltd | Financial services | 2024 |
| Innofei Ltd | Wholesale & retail | 2024 |
| Innolux Limited | Administrative & support | 2016 |
| Innoprime Ltd | Wholesale & retail | 2024 |
| Innovate Power Ltd | Wholesale & retail | 2025 |
| Innovation Alpha Ltd | Financial services | 2024 |
| Innovation Clothing Ltd | Wholesale & retail | 2025 |
| Innovation Technology House Ltd | Information & communication | 2025 |
| Innovative Technology Solutions Limited | Information & communication | 2007 |
| Innovativea Cloth UK Ltd | Wholesale & retail | 2025 |
| Innovix Creation Ltd | Wholesale & retail | 2024 |
| Inodis Ltd | Wholesale & retail | 2013 |
| Inovia Limited | Professional & scientific | 2007 |
| Inovotex Limited | Administrative & support | 2009 |
| Inphiera Limited | Manufacturing | 2024 |
| Insightpro Advisors Ltd | Financial services | 2024 |
| Insisys Developments Four Limited | Construction | 2023 |
| Insisys Developments Pembroke Limited | Construction | 2020 |
| Insisys Holdings Limited | Financial services | 2018 |
| Inspection Advice & Training Services Limited | Administrative & support | 2019 |
| Inspiration Light Co., Ltd | Education | 2025 |
| Inspire Finance Partners LLP | | 2011 |
| Inspired Accounting Ltd | Professional & scientific | 2021 |
| Inspired Livin Ltd | Construction | 2026 |
| Inspired Training Worldwide LLP | | 2010 |
| Inspired Tutoring Ltd | Transport & logistics | 2018 |
| Inspirevolve Limited | Professional & scientific | 2000 |
| Inspoire Ltd | Wholesale & retail | 2024 |
| Instahost Solutions Ltd | Information & communication | 2018 |
| Instinct Training LLP | | 2004 |
| Institute of Detectorists C.I.C. | Education | 2018 |
| Insur IQ Ltd | Professional & scientific | 2025 |
| INT Records Ltd | Information & communication | 2026 |
| Inte Rparfums (UK) Co., Ltd | Wholesale & retail | 2020 |
| Intecloud Cdnk Ltd | Wholesale & retail | 2023 |
| Integas Consultancy Limited | Professional & scientific | 2020 |
| Integerweb Ltd | Information & communication | 2015 |
| Integra Trade Limited | Wholesale & retail | 2026 |
| Integration Digital Ltd | Wholesale & retail | 2025 |
| Integrity Plus Services C.I.C. | Hospitality | 2020 |