| Icerex Limited | Construction | 2020 |
| Icesage Limited | Wholesale & retail | 2026 |
| Icetuk Limited | Professional & scientific | 2017 |
| Icey's Beauty Lounge Ltd | Other services | 2018 |
| ICH for Consulting and Marketing Ltd | Professional & scientific | 2021 |
| Ichiban Trading Ltd | Wholesale & retail | 2024 |
| Icims Solutions Ltd | Information & communication | 2014 |
| Icitytech Ltd | Wholesale & retail | 2019 |
| Icke Connects Music Ltd | Arts & recreation | 2026 |
| Iclosure Ltd | Information & communication | 2026 |
| Iclouduk Ltd | Wholesale & retail | 2026 |
| Iclub Limited | Extraterritorial | 2012 |
| ICM Ailearning Limited | Education | 2025 |
| ICM Business Solutions Ltd | Information & communication | 2016 |
| ICM Econominds Ltd | Information & communication | 2019 |
| Icmeuk Ltd | Wholesale & retail | 2022 |
| ICN Systems Limited | Construction | 2015 |
| ICO Tournaments Ltd | Administrative & support | 2016 |
| Icob D&B Ltd | Construction | 2023 |
| Icocolens Ltd | Wholesale & retail | 2022 |
| Icom Properties Ltd | Real estate | 2025 |
| Icom Voice Ltd | Information & communication | 2013 |
| Icon Boutique London Ltd | Wholesale & retail | 2023 |
| Icon Constrcutions DBC Ltd | Construction | 2025 |
| Icon Entertainment Limited | Arts & recreation | 2025 |
| Icon Manchester Developments II Limited | Construction | 2019 |
| Icon Manchester Developments Limited | Construction | 2018 |
| Icon Menswear Mobiles & Accessories Ltd | Wholesale & retail | 2026 |
| Icon Scientific Limited | Professional & scientific | 2009 |
| Icon Softtech Limited | Information & communication | 2010 |
| Icon Systems Ltd | Wholesale & retail | 2026 |
| Iconia Services Limited | Health & social care | 2022 |
| Iconic and Global Limited | Professional & scientific | 2023 |
| Iconic Aspire Ltd | Wholesale & retail | 2024 |
| Iconic Care Ltd | Administrative & support | 2016 |
| Iconic Doors Ltd | Construction | 2023 |
| Iconic Hair Dressing and Barbers Limited | Other services | 2018 |
| Iconic Motors Ltd | Wholesale & retail | 2026 |
| Iconic Pro Ltd | Information & communication | 2014 |
| Iconic Protein Shake Limited | Arts & recreation | 2025 |
| Iconic Systems Limited | Information & communication | 2014 |
| Iconic Union FB Ltd | Information & communication | 2025 |
| Iconoclass UK Ltd | Professional & scientific | 2021 |
| Icop Construction UK Limited | Construction | 2022 |
| Icore Business Solutions Limited | Professional & scientific | 2022 |
| Icourier Express Limited | Transport & logistics | 2019 |
| Icpremier Limited | Wholesale & retail | 2025 |
| ICR Bistro Limited | Hospitality | 2022 |
| ICR Groups Ltd | Hospitality | 2025 |
| Icrazyteddy Limited | Information & communication | 2022 |
| ICS Landscaping Limited | Transport & logistics | 2020 |
| ICS Management Group Ltd | Professional & scientific | 2026 |
| ICS Surveys Ltd. | Construction | 2019 |
| ICS1 Limited | Administrative & support | 2025 |
| ICT House Limited | Information & communication | 2019 |
| ICU Transformational Arts Limited | Education | 2008 |
| Icuk Ltd | Wholesale & retail | 2024 |
| Icystone Limited | Wholesale & retail | 2026 |
| ID Property Developments Ltd | Construction | 2020 |
| ID Retail Limited | Wholesale & retail | 2022 |
| ID Scaffold Limited | Construction | 2024 |
| ID Security Systems Limited | Construction | 2007 |
| Idaebou Logistics Ltd | Transport & logistics | 2025 |
| Idaitics Limited | Information & communication | 2025 |
| Idara Fezan UL Quran | Professional & scientific | 2012 |
| Idara Limited | Hospitality | 2025 |
| Idea Rewards Card Ltd | Other services | 2014 |
| Ideal Accountancy & IT Services Ltd | Information & communication | 2016 |
| Ideal Aircraft Seating Limited | Manufacturing | 2016 |
| Ideal Appliances Limited | Wholesale & retail | 2025 |
| Ideal ARK Company Limited | Real estate | 2023 |
| Ideal Building & Landscapes Ltd | Construction | 2022 |
| Ideal Choice Online Ltd | Other services | 2020 |
| Ideal Design WM Ltd | Construction | 2023 |
| Ideal Electrical Services (Contracting) Ltd | Construction | 2021 |
| Ideal Energy Solutions Private Ltd | Construction | 2024 |
| Ideal Fish and Chips Ltd | Hospitality | 2024 |
| Ideal Fostering Holdings Limited | Health & social care | 2017 |
| Ideal Fostering Limited | Health & social care | 2013 |
| Ideal Grill Ltd | Hospitality | 2026 |
| Ideal Habitat Associates Ltd | Health & social care | 2019 |
| Ideal Heating & Plumbing Services Ltd | Construction | 2022 |
| Ideal Kitchen & Bathrooms Limited | Wholesale & retail | 2005 |
| Ideal Mortgage Selection Ltd | Financial services | 2024 |
| Ideal Plumbing Services Limited | Construction | 2023 |
| Ideal Recruitment Services Ltd | Professional & scientific | 2019 |
| Ideal Security UK Solutions Ltd | Administrative & support | 2023 |
| Ideal Staff Group Ltd | Administrative & support | 2021 |
| Ideal Stay SSR Ltd | Hospitality | 2019 |
| Ideal Village Limited | Education | 2025 |
| Idealgrafix Ltd | Manufacturing | 2011 |
| Idearipple Group Limited | Wholesale & retail | 2026 |
| Ideas in Action (Midlands) Limited | Administrative & support | 2002 |
| Ideas That Work Limited | Professional & scientific | 2015 |
| Idease Ltd | Construction | 2020 |
| Ideation Digital Consulting Services Limited | Information & communication | 2015 |
| Idex Consulting Ltd. | Administrative & support | 2005 |
| IDI Assistance Ltd | Manufacturing | 2026 |
| Idin & Iyda Ltd | Extraterritorial | 2013 |
| Idiot Box Ltd | Information & communication | 2024 |