| Intocash Ltd | Wholesale & retail | 2020 |
| Intrad Group Ltd | Wholesale & retail | 2021 |
| Intratek Commercial Ltd | Real estate | 2021 |
| Intrinsic Care Ltd | Health & social care | 2022 |
| Intrinsic Strands Limited | Wholesale & retail | 2024 |
| Intrinsicare Ltd | Administrative & support | 2022 |
| Intuitivesoft Limited | Information & communication | 2010 |
| Intwala Limited | Other services | 2019 |
| Invamal Limited | Financial services | 2001 |
| Invariant Forge Limited | Information & communication | 2026 |
| Invent Homes Ltd | Wholesale & retail | 2019 |
| Inventive Bars Ltd | Hospitality | 2017 |
| Inventory Solutions NW Ltd | Households | 2025 |
| Inventron Limited | Professional & scientific | 2016 |
| Inver Construction Services Ltd | Construction | 2017 |
| Inveraray Ventures Limited | Information & communication | 2025 |
| Inverison Limited | Professional & scientific | 2024 |
| Investasurge Holdings Limited | Administrative & support | 2016 |
| Investasurge Management Consulting Limited | Administrative & support | 2019 |
| Investasurge Ventures Limited | Administrative & support | 2020 |
| Investcrate Limited | Financial services | 2024 |
| Invested Developments Limited | Construction | 2024 |
| Investedbylouis Limited | Wholesale & retail | 2026 |
| Investia Properties LLP | | 2006 |
| Investment Fund Services Limited | Financial services | 2007 |
| Investment LAB Ltd | Real estate | 2021 |
| Investment Stone Ltd | Real estate | 2025 |
| Investmentislife Limited | Real estate | 2022 |
| Inview Group Ltd | Administrative & support | 2025 |
| Invii Ltd | Professional & scientific | 2019 |
| Invincible Marketing Ltd | Manufacturing | 2021 |
| Invision Technology (UK) Ltd | Wholesale & retail | 2011 |
| Invisu Digital Documentation Ltd | Professional & scientific | 2025 |
| Invisu Limited | Information & communication | 2014 |
| Invite Technologies, Ltd | Professional & scientific | 2023 |
| Invoice Ready Solutions UK Ltd | Professional & scientific | 2015 |
| INVSG17 Limited | Construction | 2022 |
| INVSG18 Limited | Construction | 2022 |
| INVSG19 Limited | Extraterritorial | 2022 |
| INVSG20 Limited | Extraterritorial | 2022 |
| Inza Enterprise Ltd. | Transport & logistics | 2013 |
| In’Site Property Surveys Ltd | Professional & scientific | 2025 |
| IOM Sports and Entertainment Ltd | Professional & scientific | 2020 |
| ION Associates Limited | Manufacturing | 2009 |
| ION Footwear Limited | Manufacturing | 2002 |
| ION IP Ltd | Manufacturing | 2009 |
| Iosman Company Limited | Information & communication | 2023 |
| IPA Brickwork Ltd | Construction | 2018 |
| IPB Consultancy Ltd | Other services | 2019 |
| Ipec Property Limited | Real estate | 2004 |
| Ipeople Recruitment International Ltd | Professional & scientific | 2018 |
| Iperform (Theatre School) Limited | Education | 2011 |
| Ipjs Holdings Limited | Financial services | 2024 |
| IPO in 5 Limited | Professional & scientific | 2024 |
| Ipoint Systems Limited | Information & communication | 2009 |
| Ipptok Limited | Information & communication | 2025 |
| IPX Global Ltd | Wholesale & retail | 2023 |
| IQ Goods Ltd | Wholesale & retail | 2023 |
| IQ Holding NW Ltd | Financial services | 2022 |
| IQ Medical Services Limited | Wholesale & retail | 2015 |
| IQ Multistore Ltd | Wholesale & retail | 2024 |
| IQ6550 Ltd | Wholesale & retail | 2026 |
| Iqbal Avila & SON Limited | Transport & logistics | 2019 |
| Iqbal Builders Limited | Construction | 2024 |
| Iqbal Holdings Limited | Financial services | 2016 |
| Iqbal Travels Ltd | Transport & logistics | 2025 |
| Iqbal&Co Ltd | Wholesale & retail | 2022 |
| Iqra Trade Limited | Wholesale & retail | 2024 |
| Iqsha Distribution Ltd | Wholesale & retail | 2026 |
| Iqtisad Technologies Ltd | Information & communication | 2025 |
| Ireh Connect Ltd | Wholesale & retail | 2025 |
| Irene and Co Limited | Arts & recreation | 2013 |
| Irhabanga Ltd | Wholesale & retail | 2025 |
| Iris Angel Limited | Other services | 2024 |
| Irish Crystal.Eu Limited | Wholesale & retail | 2025 |
| Irish Freight Solutions Limited | Transport & logistics | 2019 |
| Irisic Ltd | Manufacturing | 2026 |
| Irits Events Limited | Administrative & support | 2014 |
| Ironbridge Consulting Limited | Professional & scientific | 2012 |
| Ironclad Transports Ltd | Transport & logistics | 2025 |
| Ironing Professionals Ltd | Other services | 2016 |
| Ironxv Limited | Other services | 2025 |
| IRY Retail Limited | Wholesale & retail | 2023 |
| Isaar Welfare | Education | 2024 |
| Isabelle LSM Ltd | Extraterritorial | 2012 |
| Isacasahomes Ltd | Real estate | 2022 |
| Isadoska Limited | Information & communication | 2023 |
| Isahv Holdings Limited | Financial services | 2024 |
| Isahvconsultants Ltd | Information & communication | 2023 |
| Isaiah 53 Christian Bookshop Ltd | Wholesale & retail | 2019 |
| Isair Assets Ltd | Wholesale & retail | 2024 |
| Isair Capital Ltd | Financial services | 2024 |
| Isavecard Ltd | Administrative & support | 2018 |
| ISB Trader Limited | Wholesale & retail | 2025 |
| ISC- International Study Connections Ltd | Education | 2023 |
| ISD Properties 2025 Ltd | Real estate | 2025 |
| Isekai Services Limited | Transport & logistics | 2022 |
| Iseo Blue Limited | Information & communication | 2016 |
| Ishaq Enterprises Ltd | Wholesale & retail | 2019 |
| Isherwood Civil Engineering Limited | Construction | 2014 |