| Industrial Maverick Limited | Professional & scientific | 2001 |
| Industrial Mechanical Engineering Ltd | Professional & scientific | 2012 |
| Industrial Moulded Products (Bilston) Limited | Real estate | 1983 |
| Industrial Painting Contractors Ltd | Construction | 2016 |
| Industrial Pipeline Supplies Limited | Wholesale & retail | 2002 |
| Industrial Sales Consulting Ltd | Professional & scientific | 2025 |
| Industrial Software Services Ltd | Professional & scientific | 2019 |
| Industrial Symbiosis Limited | Professional & scientific | 2005 |
| Industrial Vacuums Ltd | Wholesale & retail | 2016 |
| Industrial Valves and Penstocks Limited | Manufacturing | 2022 |
| Industrial Valves Flow Control Limited | Manufacturing | 2020 |
| Industrial Workplace Solutions Limited | Wholesale & retail | 2009 |
| Industries International Limited | Administrative & support | 2004 |
| Industrious Artists Ltd | Wholesale & retail | 2011 |
| Industrious Services Limited | Administrative & support | 2025 |
| Industrisafe Ltd | Wholesale & retail | 2024 |
| Indy and Lola Properties Limited | Real estate | 2025 |
| Indy Carpets Ltd | Construction | 2025 |
| Indy Solutions Limited | Professional & scientific | 2022 |
| Indygroup Ltd | Other services | 2023 |
| Ineffable Attire Limited | Wholesale & retail | 2019 |
| Ineight Technology UK Ltd | Wholesale & retail | 2025 |
| Inels Medicals Limited | Health & social care | 2024 |
| Ines Cafe Ltd | Hospitality | 2022 |
| Inet Integrators Ltd | Construction | 2021 |
| INEZ2021 Limited | Health & social care | 2023 |
| INF Accountants Limited | Professional & scientific | 2023 |
| INF24 Limited | Administrative & support | 2016 |
| Infamous Productionz Limited | Arts & recreation | 2015 |
| Infarmer Ltd | Information & communication | 2021 |
| Inferadata AI Limited | Wholesale & retail | 2025 |
| Inferno Agency Limited | Arts & recreation | 2021 |
| Inferno Community Limited | Other services | 2026 |
| Infernoz Limited | Hospitality | 2019 |
| Infies Influence Limited | Administrative & support | 2024 |
| Infinet Technology Ltd | Information & communication | 2013 |
| Infinite Asset Holding Ltd | Real estate | 2024 |
| Infinite Being Forever Limited | Health & social care | 2020 |
| Infinite Chauffeurs Ltd | Transport & logistics | 2024 |
| Infinite Eco Solutions Ltd | Construction | 2024 |
| Infinite Engineering Limited | Manufacturing | 2011 |
| Infinite Golden Scissors 1 Ltd | Other services | 2025 |
| Infinite Golden Scissors 2 Ltd | Other services | 2025 |
| Infinite Goose Limited | Information & communication | 2018 |
| Infinite Group Services Ltd | Professional & scientific | 2023 |
| Infinite Homes Ltd | Real estate | 2026 |
| Infinite Houses Limited | Real estate | 2020 |
| Infinite Housing Birmingham Limited | Hospitality | 2026 |
| Infinite HQ Properties Ltd | Real estate | 2026 |
| Infinite Land & Property Holdings Ltd | Real estate | 2025 |
| Infinite Legacy Group Ltd | Wholesale & retail | 2020 |
| Infinite Loop Systems Ltd | Other services | 2022 |
| Infinite Medics Ltd | Health & social care | 2010 |
| Infinite Mobiles Limited | Wholesale & retail | 2022 |
| Infinite Picks Ltd | Wholesale & retail | 2025 |
| Infinite Quality Patches and Custom Apparel Limited | Manufacturing | 2022 |
| Infinite Resilience UK Limited | Real estate | 2024 |
| Infinite View Ltd | Information & communication | 2020 |
| Infinite-Echo Limited | Information & communication | 2023 |
| Infinitedeals Limited | Wholesale & retail | 2025 |
| Infiniti Art Ltd | Wholesale & retail | 2020 |
| Infinitive AV Ltd | Administrative & support | 2020 |
| Infinity 2024 Limited | Manufacturing | 2024 |
| Infinity 3D Implants Ltd | Manufacturing | 2022 |
| Infinity 811 Ltd | Health & social care | 2022 |
| Infinity Brewing Company Ltd | Manufacturing | 2016 |
| Infinity Centre Ltd | Arts & recreation | 2019 |
| Infinity Commodities Ltd | Wholesale & retail | 2016 |
| Infinity DE Homeland Limited | Real estate | 2022 |
| Infinity Estates Management Ltd | Real estate | 2024 |
| Infinity Estates Yorkshire Ltd | Real estate | 2011 |
| Infinity Events & Management Limited | Arts & recreation | 2022 |
| Infinity Excellence Ltd | Health & social care | 2021 |
| Infinity Global Solutions Limited | Wholesale & retail | 2025 |
| Infinity Holdings (Wimbledon) Limited | Financial services | 2022 |
| Infinity Home Living Limited | Wholesale & retail | 2023 |
| Infinity Housing Limited | Hospitality | 2018 |
| Infinity Human Ltd | Manufacturing | 2019 |
| Infinity Indemnity Limited | Information & communication | 2016 |
| Infinity Investment Solutions Limited | Real estate | 2011 |
| Infinity KM Limited | Real estate | 2013 |
| Infinity Labs IT Services Ltd | Information & communication | 2015 |
| Infinity London Group Holdings Limited | Financial services | 2022 |
| Infinity Mart Solutions Ltd | Wholesale & retail | 2025 |
| Infinity One AJ Ltd | Transport & logistics | 2025 |
| Infinity Partners Capital Limited | Real estate | 2021 |
| Infinity Peak Venture Ltd | Wholesale & retail | 2025 |
| Infinity Plaza Limited | Wholesale & retail | 2023 |
| Infinity Pluss Ltd | Other services | 2023 |
| Infinity Properties Investments Ltd | Real estate | 2020 |
| Infinity Property Services Birmingham Ltd | Real estate | 2019 |
| Infinity Realisations Ltd | Professional & scientific | 2022 |
| Infinity Renovations Home Limited | Real estate | 2024 |
| Infinity Renovations Ltd | Construction | 2022 |
| Infinity Serviced Offices Dudley Limited | Real estate | 2022 |
| Infinity Speedition Limited | Transport & logistics | 2021 |
| Infinity Tiger Property Limited | Real estate | 2023 |
| Infinity Trading Group Limited | Transport & logistics | 2026 |
| Infinity Training Services {UK} Ltd. | Education | 2018 |
| Infinity Travel Solutions Ltd | Transport & logistics | 2024 |