| Incisive Clinical Ltd | Public administration | 2022 |
| Incite Consulting Services Ltd | Professional & scientific | 2019 |
| Inclusion Healthcare Social Enterprise CIC | Health & social care | 2010 |
| Inclusion Support Services Ltd | Health & social care | 2023 |
| Incrementa Consulting Limited | Professional & scientific | 2015 |
| Incushq Ltd | Professional & scientific | 2025 |
| Incy Wincy's Preschool Ltd | Health & social care | 2021 |
| Ind.Export Ltd | Wholesale & retail | 2026 |
| IND13 Limited | Information & communication | 2006 |
| Independant Printing Solutions Limited | Administrative & support | 2006 |
| Independence Administration Ltd | Financial services | 2008 |
| Independence Studies Ltd | Administrative & support | 2022 |
| Independent Business Recovery Limited | Professional & scientific | 2016 |
| Independent Child Psychology Services Limited | Education | 2003 |
| Independent Heritage Network Ltd | Professional & scientific | 2024 |
| Independent Living Network Ltd | Health & social care | 2025 |
| Independent Performance & Operations Group Limited | Professional & scientific | 2026 |
| Independent Regulators Limited | Health & social care | 2014 |
| Independent Shopfitting Solutions Ltd | Construction | 2007 |
| Independent Workplace Investigations Limited | Administrative & support | 2025 |
| Inder Bansuri Ltd | Information & communication | 2026 |
| Indersol Limited | Information & communication | 2025 |
| Indesign Interiors Ltd | Manufacturing | 2023 |
| Index DFE Ltd | Other services | 2015 |
| Indi Group Ltd | Wholesale & retail | 2024 |
| Indi Investments Ltd | Real estate | 2022 |
| Indi Johal Ltd | Wholesale & retail | 2025 |
| Indi KAL Limited | Wholesale & retail | 1999 |
| Indi Logistics Limited | Transport & logistics | 2024 |
| Indi Pet Supplies Ltd | Wholesale & retail | 2020 |
| Indi Trading UK Ltd | Wholesale & retail | 2020 |
| India FOOD2GO Ltd | Hospitality | 2019 |
| Indian Foods Ltd | Hospitality | 2025 |
| Indian Kohinoor Foods Ltd | Hospitality | 2014 |
| Indian Law Services Ltd | Administrative & support | 2023 |
| Indian Nature Fresh Ltd. | Wholesale & retail | 2014 |
| Indian OFF License Ltd | Wholesale & retail | 2024 |
| Indian Rooster (Leicester) Limited | Hospitality | 2021 |
| Indian Rooster (Melton Road) Limited | Hospitality | 2022 |
| Indian Rooster Limited | Hospitality | 2018 |
| Indian Spice & Grill Ltd | Hospitality | 2024 |
| Indian Street Food Midlands Ltd | Hospitality | 2025 |
| Indian Sweet Box Oadby Ltd | Hospitality | 2023 |
| Indian Weddings Group Limited | Professional & scientific | 2023 |
| Indiana Foods Ltd | Hospitality | 2022 |
| Indicai Ltd | Health & social care | 2024 |
| Indie and West Ltd | Hospitality | 2019 |
| Indie Education | Education | 2024 |
| Indie Software Co Ltd | Information & communication | 2022 |
| Indiecam Limited | Information & communication | 2002 |
| Indigo 12 Holdings Limited | Financial services | 2019 |
| Indigo Blue Media Ltd | Information & communication | 2010 |
| Indigo Creative UK Limited | Professional & scientific | 2004 |
| Indigo Group Investments Limited | Administrative & support | 2000 |
| Indigo Home Interiors Ltd | Wholesale & retail | 2022 |
| Indigo Properties Management Limited | Real estate | 2021 |
| Indigo Pubs & Bars Ltd | Hospitality | 2010 |
| Indigo Pure Vegetarian Limited | Hospitality | 2025 |
| Indigo Renewable Energies Limited | Manufacturing | 2011 |
| Indigo Square Limited | Education | 2011 |
| Indigo VEG Limited | Hospitality | 2025 |
| INDIGO12 Technology Limited | Information & communication | 2022 |
| Indigotigre Limited | Energy | 2014 |
| Indikal UK Limited | Wholesale & retail | 2007 |
| Indimix Limited | Information & communication | 2006 |
| Indithreads Ltd | Wholesale & retail | 2025 |
| Indland Technologies Limited | Information & communication | 2009 |
| Indo Brit Trade Bureau CIC | Administrative & support | 2024 |
| Indo British UK Limited | Wholesale & retail | 2015 |
| Indomi Limited | Manufacturing | 2022 |
| Indrive Limited | Administrative & support | 2013 |
| Indulge Desserts Coventry Ltd | Hospitality | 2020 |
| Indulza Limited | Hospitality | 2026 |
| Indus Consultancy Services Ltd | Professional & scientific | 2024 |
| Indusbridge Ltd | Professional & scientific | 2026 |
| Industria Franchises Limited | Administrative & support | 2007 |
| Industria Outsourcing Limited | Administrative & support | 2009 |
| Industria Personnel Services Ltd. | Administrative & support | 2002 |
| Industria UK Limited | Information & communication | 2002 |
| Industrial & Commercial Buildings Limited | Manufacturing | 2022 |
| Industrial Bar Project Limited | Hospitality | 2018 |
| Industrial Claims Assessors Ltd. | Professional & scientific | 2002 |
| Industrial Insulation Company Limited | Construction | 1982 |
| Industrial Insulation Contract Services Ltd | Construction | 2005 |
| Industrial Maintenance Supplies (Leicester) Limited | Wholesale & retail | 2005 |
| Industrial Microwave Services Limited | Manufacturing | 1996 |
| Industrial Pumps and Motors Limited | Manufacturing | 2003 |
| Industrial Resin Surfaces Ltd | Construction | 2022 |
| Industrial Wiper Company Limited | Manufacturing | 2003 |
| Industrial Wood Design Ltd | Wholesale & retail | 2024 |
| Industrious Effect Limited | Information & communication | 2020 |
| Industrious Mouse Limited | Information & communication | 2011 |
| Industry Insights Ltd | Professional & scientific | 2015 |
| Indy Enterprises Ltd | Real estate | 2024 |
| Indy Ventures Ltd | Transport & logistics | 2026 |
| Inet Interpreting Ltd | Professional & scientific | 2013 |
| Inferior Fashion Ltd | Manufacturing | 2026 |
| Infill Land Consultants Limited | Construction | 1998 |
| Infinate Trading Ltd | Wholesale & retail | 2023 |
| Infinit Global Ltd | Wholesale & retail | 2023 |