| Imagioplus Studio Ltd | Professional & scientific | 2025 |
| Imago Extra Ltd | Administrative & support | 2019 |
| Imaintain Ltd | Manufacturing | 2018 |
| Imajin Ltd | Construction | 2024 |
| Imara Development Programmes Limited | Professional & scientific | 2008 |
| IMB Technology Limited | Information & communication | 2016 |
| Imbibe Venues Ltd | Hospitality | 2024 |
| Imbridge Investment Limited | Real estate | 2025 |
| IMC Group Consulting Limited | Extraterritorial | 2013 |
| Imeduk Ltd | Education | 2023 |
| Imergeflow Limited | Information & communication | 2026 |
| IMF Homes Limited | Real estate | 2019 |
| Imli Takeaway Ltd | Hospitality | 2026 |
| Immaculateness Clean Ltd | Administrative & support | 2025 |
| Immanis Limited | Administrative & support | 1999 |
| Immediate Accounting Solutions Limited | Professional & scientific | 2015 |
| Immediate Properties Ltd | Real estate | 2020 |
| Immerced Limited | Professional & scientific | 2023 |
| Immersive Training Limited | Education | 2016 |
| Immigration Advice Ltd | Professional & scientific | 2018 |
| Immigration Joss Ltd | Professional & scientific | 2019 |
| Immlec Ltd | Professional & scientific | 2012 |
| Immovestanstalt Property Ltd | Real estate | 2022 |
| Immy Estates Ltd | Real estate | 2023 |
| Imogen Arora Limited | Hospitality | 2018 |
| Impacd C.I.C. | Other services | 2018 |
| Impact Accident Repairs (Nottingham) Limited | Wholesale & retail | 2003 |
| Impact Accountancy Limited | Professional & scientific | 2023 |
| Impact Building Services EOT Limited | Administrative & support | 2020 |
| Impact Building Services Holdings Limited | Financial services | 2012 |
| Impact Building Services Limited | Construction | 1995 |
| Impact Investment Group UK Limited | Real estate | 2025 |
| Impact Leadership Limited | Education | 2024 |
| Impact Marketing & Publicity Limited | Information & communication | 1985 |
| Impact Metal Finishing (2004) Ltd | Manufacturing | 2004 |
| Impact People & Change Ltd | Professional & scientific | 2019 |
| Impact Physiotherapy and Sports Injury Clinics Limited | Health & social care | 2010 |
| Impact Powertech Limited | Professional & scientific | 2014 |
| Impact Properties (East Midlands) Limited | Professional & scientific | 2011 |
| Impact Safety With Shane Clark Ltd | Arts & recreation | 2024 |
| Impactful People Limited | Information & communication | 2023 |
| Impala Bidco Limited | Financial services | 2017 |
| Impala Bondco PLC | Administrative & support | 2021 |
| Impatient Management Limited | Professional & scientific | 2005 |
| Imperial Accounting Services Limited | Professional & scientific | 2018 |
| Imperial Auto Traders Ltd | Wholesale & retail | 2025 |
| Imperial Avenue 1963 Limited | Extraterritorial | 2014 |
| Imperial Care Consortium Ltd | Health & social care | 2022 |
| Imperial Cars Ltd | Wholesale & retail | 2025 |
| Imperial Chauffeur Services Limited | Administrative & support | 2015 |
| Imperial Dining Club Ltd | Wholesale & retail | 2025 |
| Imperial Fragrances UK Ltd | Wholesale & retail | 2024 |
| Imperial Heating & GAS Services Limited | Construction | 2014 |
| Imperial Investment Holdings Limited | Financial services | 2023 |
| Imperial Monarch Ltd | Wholesale & retail | 2017 |
| Imperial Properties Notts Ltd | Real estate | 2025 |
| Imperial Residential Developments Limited | Construction | 2019 |
| Imperial SME Accounting Limited | Professional & scientific | 2006 |
| Imperial Ventures Inc Ltd | Real estate | 2020 |
| Imperio Construction and Maintenance Ltd | Construction | 2026 |
| Imperio Services and Maintenance Limited | Other services | 2026 |
| Imperium Electrical Projects Limited | Construction | 2024 |
| Impero Associates Ltd | Real estate | 2019 |
| Impero Developments Limited | Professional & scientific | 2014 |
| Impero Holdings Limited | Professional & scientific | 2013 |
| Impero International Ltd | Professional & scientific | 2009 |
| Impero Property Solutions Ltd | Real estate | 2019 |
| Impero Solutions Limited | Information & communication | 2007 |
| Impero Trustee Limited | Professional & scientific | 2015 |
| Impetro Global Ltd | Professional & scientific | 2021 |
| Impex European Ltd | Transport & logistics | 2024 |
| Imphd Ltd | Hospitality | 2023 |
| Impidia Ltd | Information & communication | 2026 |
| Implant Systems Limited | Financial services | 2024 |
| Implevo Ltd | Administrative & support | 2026 |
| Import China (UK) Ltd | Wholesale & retail | 2015 |
| Impression Digital Group Limited | Financial services | 2024 |
| Impression Digital Limited | Professional & scientific | 2012 |
| Impressions (Nottingham) Limited | Construction | 1988 |
| Impressions Dental Care (Nottingham) Limited | Health & social care | 2016 |
| Impressions Dental Care Limited | Health & social care | 2015 |
| Impressions Dental Laboratory Limited | Health & social care | 2000 |
| Impressions Denture Clinic Ltd | Health & social care | 2016 |
| Imprinto Ltd | Construction | 2016 |
| Improlabs UK Ltd | Wholesale & retail | 2015 |
| Improving Lives Notts Ltd | Health & social care | 2006 |
| Impulse Media Ltd | Administrative & support | 2021 |
| IMR Mechanical Services Ltd | Construction | 2023 |
| Imran Naseer Architect Ltd | Professional & scientific | 2018 |
| IMS Accountancy Services Ltd | Professional & scientific | 2020 |
| Imsr Ltd | Extraterritorial | 2007 |
| Imsw Limited | Hospitality | 2017 |
| Imtech Aqua Building Services Ltd | Construction | 1973 |
| Imtech Aqua Controls Ltd | Construction | 1980 |
| Imtech Aqua Ltd | Professional & scientific | 1989 |
| Imtech Engineering Services London and South Ltd | Construction | 1994 |
| Imtech Engineering Services North Ltd | Construction | 1982 |
| Imtl Investments Ltd | Financial services | 2022 |
| Imweird Ltd | Wholesale & retail | 2025 |
| IN 2 Asset Management Limited | Real estate | 2016 |