| Imogen Aesthetics Limited | Other services | 2023 |
| Impact Coaching Group Ltd | Education | 2021 |
| Impact Repairs Limited | Wholesale & retail | 2002 |
| Impact Sales Training Limited | Professional & scientific | 1998 |
| Impact Tyres Limited | Wholesale & retail | 2020 |
| Impala Estates Limited | Real estate | 2006 |
| Imperial Centre Ltd | Hospitality | 2023 |
| Imperial Mansions Residential Management Company Limited | Real estate | 2006 |
| Imperial Skate Republic Ltd | Extraterritorial | 2012 |
| Imperium Global Group Limited | Professional & scientific | 2025 |
| Imperium Global Search Ltd | Administrative & support | 2019 |
| Implantsure Limited | Financial services | 2013 |
| Impression Recruitment Limited | Administrative & support | 2017 |
| Impulse Chiro Ltd | Health & social care | 2022 |
| Impulse Decisions Ltd | Administrative & support | 2010 |
| Impulse Estates Ltd | Real estate | 2020 |
| IN Hot Property (Hotels) LLP | | 2019 |
| IN Hot Property (Investments) Limited | Real estate | 2015 |
| IN Hot Property Limited | Hospitality | 2016 |
| IN OUT Drinks Ltd | Manufacturing | 2021 |
| IN Outer Space Limited | Professional & scientific | 2008 |
| IN Time Design Limited | Wholesale & retail | 2015 |
| IN2NET Ltd | Extraterritorial | 2013 |
| Inboxxia/Inboxxium Limited | Information & communication | 2021 |
| Inca Europe Ltd. | Information & communication | 1998 |
| IND1ANA Limited | Wholesale & retail | 2020 |
| Indentations Ltd | Wholesale & retail | 2011 |
| Independent Advisory Network Limited | Professional & scientific | 2017 |
| Independent Steel Importers Ltd | Manufacturing | 2011 |
| India Mahon Limited | Wholesale & retail | 2016 |
| Indie Collection Ltd | Wholesale & retail | 2024 |
| Indigo Care Newco Limited | Financial services | 2025 |
| Indigo Care Services (2) Limited | Health & social care | 2017 |
| Indigo Care Services Limited | Health & social care | 2015 |
| Indigowhite Limited | Wholesale & retail | 2020 |
| Industrial Development Projects Limited | Real estate | 2020 |
| Industrial Development Solutions Limited | Extraterritorial | 2022 |
| Indy Car Ltd | Extraterritorial | 2015 |
| Inengineering (Nottingham) Limited | Manufacturing | 2015 |
| INFIN8 Limited | Professional & scientific | 2016 |
| Infinite Green Energy Global (Igeg) Ltd | Manufacturing | 2022 |
| Infinite Property Services Ltd | Construction | 2021 |
| Infinity 88 Properties Ltd | Real estate | 2026 |
| Infinity Blue Creative Limited | Professional & scientific | 2025 |
| Infinity Blue Group Ltd | Professional & scientific | 2017 |
| Infinity Blue Holdings Limited | Financial services | 2023 |
| Infinity Blue Imports Ltd | Wholesale & retail | 2022 |
| Infinity Blue Retail Limited | Wholesale & retail | 2022 |
| Infinity Markets Limited | Information & communication | 2025 |
| Influencer Sales Agency Limited | Wholesale & retail | 2024 |
| Influx Limited | Extraterritorial | 2025 |
| Information Nation Limited | Extraterritorial | 2012 |
| Infronix Trading & Contracting Ltd | Extraterritorial | 2022 |
| Ingenium SL Limited | Information & communication | 2012 |
| Ingerthorpe Construction Group Ltd | Construction | 2024 |
| Ingerthorpe Dairy Limited | Agriculture & fishing | 2025 |
| Ingerthorpe Holdings Ltd | Financial services | 2026 |
| Ingerthorpe Properties Limited | Real estate | 2024 |
| Inglehurst Estates Limited | Real estate | 2015 |
| Inglehurst Homes Limited | Real estate | 2025 |
| Inglehurst Limited | Real estate | 2015 |
| Inglehurst Property Limited | Construction | 2015 |
| Ingot House Management Limited | Real estate | 2001 |
| INGR1D Ltd | Extraterritorial | 2020 |
| Inicio Consultants Limited | Administrative & support | 2024 |
| Inicio Properties Limited | Real estate | 2022 |
| Initsolve Consulting Limited | Information & communication | 2024 |
| INK Investment Holdings Limited | Financial services | 2019 |
| Inmarco Limited | Professional & scientific | 2011 |
| Innova Solutions Limited | Wholesale & retail | 2002 |
| Innova Trustees Limited | Administrative & support | 2023 |
| Innovamed Ltd | Wholesale & retail | 2024 |
| Innovationem Vigilando Limited | Other services | 2025 |
| Innovative Exploits Ltd | Wholesale & retail | 2020 |
| Innovative Improvement Ltd. | Professional & scientific | 2011 |
| Inovus Products Limited | Wholesale & retail | 2024 |
| Inquirer Media Limited | Information & communication | 2026 |
| Inracing Limited | Manufacturing | 2015 |
| Insect Secure Ltd | Administrative & support | 2019 |
| Inside OUT Communications Ltd | Professional & scientific | 2016 |
| Insideout Supplies Ltd | Wholesale & retail | 2013 |
| Inspir IT Ltd | Manufacturing | 2015 |
| Inspire Intimates Limited | Wholesale & retail | 2011 |
| Inspire Intimates Property Ltd | Real estate | 2015 |
| Inspire KBB Ltd | Wholesale & retail | 2017 |
| Inspired Lets Ltd | Real estate | 2021 |
| Inspiring Properties Limited | Real estate | 2019 |
| Insulation Jacketing and Accessories Limited | Other services | 2016 |
| Insync Global Education Ltd. | Education | 2013 |
| Inteda International Education Consulting Company Ltd | Other services | 2019 |
| Integra Advisory Ltd | Professional & scientific | 2026 |
| Integrated Access Limited | Construction | 2010 |
| Integrated Laboratory Services Ltd. | Manufacturing | 1995 |
| Integriti-Test Services Ltd | Professional & scientific | 2023 |
| Intekral for Trade Ltd | Wholesale & retail | 2023 |
| Intellect Management Limited | Professional & scientific | 1998 |
| Intelligence Hosting Services Ltd | Information & communication | 2017 |
| Intelligent Business Partners Limited | Professional & scientific | 2008 |
| Intelligent Flow Management Ltd | Information & communication | 2019 |
| Intelligent Waste Ltd | Professional & scientific | 2000 |