| Incendio Limited | Wholesale & retail | 2011 |
| Incendium Arts Limited | Real estate | 2024 |
| Incepto Limited | Real estate | 2016 |
| Include Consulting Ltd | Professional & scientific | 2024 |
| Inclusive Consulting Ltd | Administrative & support | 2019 |
| Inclusive Housing Ltd | Real estate | 2017 |
| Inclusive Workforce Limited | Professional & scientific | 2021 |
| Inco Corp Ltd | Hospitality | 2020 |
| Inco Financial Limited | Financial services | 2023 |
| Inconcert People Limited | Professional & scientific | 2026 |
| Inconel Holdings Ltd | Hospitality | 2024 |
| Incplast Limited | Construction | 2019 |
| Incydental Limited | Administrative & support | 2013 |
| Independant Health Ltd | Health & social care | 2011 |
| Independent Benz Repairs Ltd | Wholesale & retail | 2020 |
| Independent Contractor Security Limited | Other services | 2007 |
| Independent Cost Consultants Limited | Information & communication | 2026 |
| Independent Electrical Wholesalers Limited | Wholesale & retail | 2007 |
| Independent Forgings & Alloys Limited | Manufacturing | 2000 |
| Independent Funeral Services (Kiveton) Ltd | Other services | 2017 |
| Independent Hotel Solutions Ltd | Professional & scientific | 2019 |
| Independent International Cleaning Services Ltd | Administrative & support | 2011 |
| Independent Label Market Limited | Arts & recreation | 2012 |
| Independent Lifts Limited | Professional & scientific | 1995 |
| Independent Mortgage Experts Limited | Financial services | 2018 |
| Independent Petrochemical Group Ltd | Wholesale & retail | 2017 |
| Independent Safety Services Limited | Professional & scientific | 2000 |
| Independent Surveying Supplies Ltd. | Wholesale & retail | 2009 |
| Index Constructionagency Ltd | Administrative & support | 2025 |
| Indian Bayleaves Limited | Hospitality | 2010 |
| Indian Food Chef Ltd | Hospitality | 2022 |
| Indian K Limited | Hospitality | 2024 |
| Indie Markets Ltd | Arts & recreation | 2019 |
| Indigo Adventures Limited | Administrative & support | 2025 |
| Indigo Facilities 2025 Limited | Administrative & support | 2009 |
| Indigo Homes Limited | Real estate | 2019 |
| Indigo Lounge Interiors Ltd | Wholesale & retail | 2020 |
| Indigo Manchester Crew Limited | Administrative & support | 2018 |
| Indrik Ltd | Construction | 2025 |
| Indrik Properties Ltd | Real estate | 2026 |
| Inductai Ltd | Information & communication | 2026 |
| Induction Furnace Solutions Limited | Financial services | 2025 |
| Induction Hardeners Limited | Professional & scientific | 1965 |
| Induction Melting Repairs Limited | Manufacturing | 2002 |
| Indulge Group Limited | Hospitality | 2025 |
| Indulgence Salon Limited | Other services | 2026 |
| Indus Catering Limited | Hospitality | 2023 |
| Indus Cloud Consulting Limited | Information & communication | 2021 |
| Indus Healthcare Limited | Health & social care | 2016 |
| Indus Occupational Health Ltd | Health & social care | 2002 |
| Indus Pink Salt Ltd | Wholesale & retail | 2024 |
| Indus the Restaurant Limited | Hospitality | 2010 |
| Industrial Contracts (Incon) Limited | Professional & scientific | 1984 |
| Industrial Control Systems Limited | Information & communication | 1995 |
| Industrial Fabrication and Site Services Limited | Manufacturing | 2019 |
| Industrial Welding Supplies Ltd | Manufacturing | 2024 |
| Industry Auto Sales Limited | Wholesale & retail | 2024 |
| Industry Auto Services Limited | Wholesale & retail | 2014 |
| Industry Property Management Limited | Real estate | 2024 |
| INDUSTRY8 Ltd | Professional & scientific | 2025 |
| Indvest Ltd | Real estate | 2025 |
| Indypendant Hair Studios Ltd | Other services | 2025 |
| Ineo Recruitment Limited | Administrative & support | 2024 |
| Inert Coin Limited | Information & communication | 2022 |
| Inex Resin & Landscaping Ltd | Administrative & support | 2023 |
| Inez Investments Ltd | Real estate | 2010 |
| Infant and Wisdom Ltd | Health & social care | 2025 |
| Infascape Ltd | Manufacturing | 2022 |
| INFIN8 Design Ltd | Information & communication | 2011 |
| Infinite Building Services Ltd | Construction | 2021 |
| Infinite Chapters Ltd | Information & communication | 2025 |
| Infinite Innovations Limited | Information & communication | 1997 |
| Infinite Partnerships Limited | Construction | 2021 |
| Infinite Prosperity Ltd | Hospitality | 2024 |
| Infinite Rice Pudding LLP | | 2022 |
| Infinite Skills CIC | Education | 2021 |
| Infinite Skills Community CIC | Education | 2025 |
| Infiniti Consortium Limited | Hospitality | 2018 |
| Infinito Supermarket Limited | Wholesale & retail | 2024 |
| Infinity 168 Limited | Other services | 2023 |
| Infinity Cleaning Solutions SY Ltd | Administrative & support | 2025 |
| Infinity Design & Install Ltd | Construction | 2022 |
| Infinity Eco Limited | Transport & logistics | 2023 |
| Infinity Fit Club Ltd | Arts & recreation | 2024 |
| Infinity Funeral Care Ltd | Other services | 2021 |
| Infinity Laser Clinics Limited | Professional & scientific | 2012 |
| Infinity Software Services Limited | Information & communication | 2021 |
| Infinity Wealth Management (Estate Protection) Ltd. | Financial services | 2008 |
| INFINITY8HUB Ltd | Wholesale & retail | 2025 |
| Infintec Limited | Professional & scientific | 2014 |
| Inflammable Films Limited | Arts & recreation | 2009 |
| Inflammable Productions Limited | Professional & scientific | 2019 |
| Inflecto Systems Ltd | Information & communication | 2008 |
| Inflight Limited | Professional & scientific | 2020 |
| Influential Comedy Ltd | Arts & recreation | 2025 |
| Infokraze Ltd | Wholesale & retail | 2025 |
| Inforcept Ltd | Information & communication | 2026 |
| Inform Surveying Limited | Professional & scientific | 2015 |
| Information and Records Management Society Limited | Other services | 2020 |
| Information for Health Limited | | 1989 |