| Ignite Consultants Limited | Administrative & support | 2024 |
| Ignite DMA Ltd | Professional & scientific | 2016 |
| Ignite Education Academy - Vocational Centre Ltd | Education | 2026 |
| Ignite Electrical Ltd | Administrative & support | 2016 |
| Ignite Global Ventures Ltd | Financial services | 2020 |
| Ignite Social Housing Limited | Hospitality | 2020 |
| Ignite the Market Ltd | Financial services | 2025 |
| IGP International Construction Limited | Construction | 2025 |
| IGR Business Consultancy UK Ltd | Professional & scientific | 2025 |
| IGT Tourism Services Ltd | Professional & scientific | 2024 |
| Igtradingsolutions Ltd | Wholesale & retail | 2025 |
| Igwhym Ltd | Wholesale & retail | 2023 |
| IH Accountants Ltd | Public administration | 2021 |
| IH Civil Engineering Ltd | Construction | 2025 |
| IH Collective Ltd | Real estate | 2025 |
| IH Healthcare Ltd | Health & social care | 2010 |
| IH Security Limited | Administrative & support | 2025 |
| Ih&S Housing Limited | Health & social care | 2026 |
| Ih&S Properties Limited | Real estate | 2025 |
| Ihadya Ltd | Wholesale & retail | 2025 |
| IHE Holdings Ltd | Financial services | 2026 |
| Ihealthcare Genius Limited | Wholesale & retail | 2015 |
| Ihealthcare Solutions Limited | Administrative & support | 2014 |
| IHF Corporation Limited | Health & social care | 2014 |
| IHF Holdings Ltd | Real estate | 2024 |
| IHF Property Ltd | Real estate | 2022 |
| IHG Leisure Services Limited | Professional & scientific | 2011 |
| IHG Management Limited | Administrative & support | 2015 |
| IHI Care Servces Limited | Health & social care | 2021 |
| IHI Care Services Limited | Health & social care | 2009 |
| IHI Services (UK) Limited | Health & social care | 2012 |
| Ihka Ltd | Health & social care | 2018 |
| IHL Birmingham Ltd | Hospitality | 2009 |
| Ihomes Letting Limited | Real estate | 2018 |
| Ihometech Ltd | Real estate | 2021 |
| Ihoot Gifts Limited | Wholesale & retail | 2018 |
| IHS Partners Ltd | Hospitality | 2026 |
| IHS Retailers Ltd | Wholesale & retail | 2023 |
| Ihsan Press Ltd | Information & communication | 2026 |
| Ihsan Relief C.I.C. | Financial services | 2022 |
| Ihtishaam Properties Ltd | Real estate | 2024 |
| Ihtisham Khatak Ltd | Wholesale & retail | 2025 |
| Ihya Foundation Ltd | Education | 2023 |
| Ihya Medical Group Ltd | Health & social care | 2022 |
| Ihya Medical Training Ltd | Education | 2025 |
| II Cleaning Limited | Administrative & support | 2017 |
| II Squared 2 Limited | Real estate | 2026 |
| II Squared Limited | Professional & scientific | 2015 |
| II UK Investments Ltd | Information & communication | 2018 |
| IIA Solutions Limited | Professional & scientific | 2024 |
| Iiam Motor Company Limited | Wholesale & retail | 2024 |
| Iicce Limited | Real estate | 2024 |
| Iicj Ltd | Other services | 2021 |
| IIS Architecture Limited | Professional & scientific | 2025 |
| IIT Enterprise Ltd | Wholesale & retail | 2026 |
| Iizuka Holdings Limited | Information & communication | 2018 |
| Iizuka Software Technologies Limited | Information & communication | 2002 |
| Ijaz Diamond Trader Ltd. | Manufacturing | 2026 |
| Ijaz Outlet Limited | Wholesale & retail | 2025 |
| IJK Limited | Real estate | 2002 |
| IJK Machinery Ltd | Wholesale & retail | 2025 |
| IJM Staffing Solutions Ltd | Construction | 2018 |
| IJO Ltd | Construction | 2013 |
| Ijoba Limited | Information & communication | 2020 |
| IJS Holdings Ltd | Administrative & support | 2016 |
| IK Fast Track Courier Ltd | Transport & logistics | 2024 |
| IK Fast Track Services Ltd | Construction | 2022 |
| IK Imran Khan Groom & Men's Wear Ltd | Wholesale & retail | 2025 |
| IK Media and Events Ltd | Administrative & support | 2024 |
| IK Optom Ltd | Health & social care | 2021 |
| IK Supply Ltd | Wholesale & retail | 2023 |
| IK Trades Ltd | Wholesale & retail | 2023 |
| IK UK Marketing Limited | Wholesale & retail | 2024 |
| IKA Housing and Support Limited | Real estate | 2025 |
| IKA Solutions UK Limited | Wholesale & retail | 2024 |
| Ikad Limited | Professional & scientific | 2024 |
| Ikam Subs Limited | Administrative & support | 2018 |
| Ikan Partners Limited | Professional & scientific | 2020 |
| Ikan Property Limited | Real estate | 2020 |
| Ikan Trading Limited | Health & social care | 2020 |
| Ikaruswear Ltd | Wholesale & retail | 2020 |
| IKC Group Limited | Administrative & support | 2015 |
| IKE Cucina Ltd | Hospitality | 2019 |
| Ikeglobal Cargo Limited | Transport & logistics | 2026 |
| Ikeigwe AI Solutions Limited | Information & communication | 2026 |
| Ikemos Ltd | Administrative & support | 2025 |
| Ikeos Research Limited | Manufacturing | 2013 |
| Iker Cleaner Ltd | Administrative & support | 2020 |
| IKG Group Limited | Administrative & support | 2020 |
| Ikhlaq EA Limited | Hospitality | 2023 |
| Ikhlaq Housing Ltd | Health & social care | 2025 |
| Ikhlas Consulting Ltd | Professional & scientific | 2023 |
| Ikhwa Sudanese Funeral Ltd | Other services | 2022 |
| Ikigai Delight Ltd | Hospitality | 2026 |
| Ikigai SAN Limited | Professional & scientific | 2019 |
| Ikintehtrader Ltd | Wholesale & retail | 2026 |
| Ikkaido Ltd | Arts & recreation | 2013 |
| Ikky Shop Ltd | Wholesale & retail | 2025 |
| Ikln Consultancy Ltd | Professional & scientific | 2023 |
| Ikmas Services Ltd | Wholesale & retail | 2019 |