| Imran Academy Ltd | Education | 2021 |
| Imran Tuition Centre Ltd | Education | 2025 |
| Imsc Limited | Real estate | 2020 |
| Imti Cars Ltd | Wholesale & retail | 2019 |
| Imukinternational Ltd | Administrative & support | 2023 |
| IN House Contractors Limited | Construction | 2016 |
| IN House Maintenance Limited | Construction | 2016 |
| Inayah by Zara Ltd | Wholesale & retail | 2019 |
| Inayat Haryanvi Sweets & Spice Ltd | Hospitality | 2026 |
| Inbox Flow Ltd | Administrative & support | 2026 |
| Incell World UK Ltd | Wholesale & retail | 2013 |
| Inclick Limited | Wholesale & retail | 2024 |
| Incoherent Clothing Ltd | Wholesale & retail | 2025 |
| Inderjit Ltd | Construction | 2025 |
| Indi Contract Services Ltd | Construction | 2019 |
| India Channel Limited | Wholesale & retail | 2026 |
| Indipharm Limited | Extraterritorial | 2014 |
| Indo Aryana Book Co Ltd | Information & communication | 2024 |
| Indo Global Holidaz UK Ltd | Administrative & support | 2023 |
| Indo Lanka Importers Limited | Wholesale & retail | 2015 |
| Indo-Global Academia Alliance | Education | 2005 |
| Indographics Limited | Professional & scientific | 2012 |
| Induk Consultants Limited | Professional & scientific | 2019 |
| Industrial Boilerhouse Accessories Ltd | Manufacturing | 2026 |
| Indy Transport Ltd | Transport & logistics | 2014 |
| Ineeda Hiring Solutions Limited | Administrative & support | 2026 |
| Infinity Cabs Limited | Transport & logistics | 2025 |
| Infinity Care Services Limited | Administrative & support | 2015 |
| Infinity Global Trade Ltd | Professional & scientific | 2024 |
| Infintum Films Ltd | Arts & recreation | 2016 |
| Influencelynk Ltd | Information & communication | 2025 |
| Ingrowth Ltd | Information & communication | 2026 |
| Inknik Properties Limited | Administrative & support | 2020 |
| Innovation Fresh VEG Limited | Wholesale & retail | 2016 |
| Innovativ Solution Worldwides Limited | Wholesale & retail | 2024 |
| Innovative Automaton Limited | Arts & recreation | 2024 |
| INOV8 Design Ltd | Wholesale & retail | 2022 |
| Inshalaw Ltd | Professional & scientific | 2023 |
| Inspire After School Club Ltd | Education | 2015 |
| Inspire Click Limited | Wholesale & retail | 2024 |
| Inspire College Limited | Education | 2024 |
| Inspire Concepts Ltd | Construction | 2022 |
| Inspire London College Limited | Education | 2013 |
| Inspire Medical Ltd | Public administration | 2021 |
| Inspire Project Management Ltd | Professional & scientific | 2025 |
| Inspired by H.O.P.E CIC | Health & social care | 2020 |
| Inspired Creations London Ltd | Administrative & support | 2017 |
| Insurants AI Limited | Information & communication | 2015 |
| Integrated IT Solutions Limited | Information & communication | 1997 |
| Intelli Cloud Technology Limited | Information & communication | 2014 |
| Intelligence Cleaning Limited | Administrative & support | 2022 |
| Intelligence Learning Management London Ltd | Other services | 2019 |
| Intellimove Ltd | Real estate | 2020 |
| Intellivision Ltd | Wholesale & retail | 2025 |
| Interactive Aviation Limited | Transport & logistics | 2005 |
| Interactive Facilities Limited | Administrative & support | 2019 |
| Interactive Healthcare CIC | Health & social care | 2023 |
| Interglobe Group Ltd | Wholesale & retail | 2016 |
| International Eventim Limited | Information & communication | 2023 |
| Internationalbeautylondon Group Ltd | Wholesale & retail | 2026 |
| Internationalbeautylondon Limited | Wholesale & retail | 2018 |
| Intertropic Ltd | Information & communication | 2007 |
| Intoo Furnishings Limited | Wholesale & retail | 2014 |
| Intteles Ltd | Wholesale & retail | 2024 |
| Inveni Labs Ltd | Information & communication | 2025 |
| Invicta 22 Limited | Households | 2025 |
| Invincible Growth Ltd | Information & communication | 2018 |
| Iordache's Delivery Services Limited | Transport & logistics | 2020 |
| IP the True Solution Ltd | Construction | 2024 |
| Ipal Construction Ltd | Construction | 2024 |
| Ipoint London Limited | Other services | 2023 |
| Ipoint Repairs Ltd | Wholesale & retail | 2025 |
| Ipost Digital Limited | Professional & scientific | 2021 |
| Ipro Gadget UK Ltd | Hospitality | 2019 |
| IRA Solutions Limited | Transport & logistics | 2020 |
| Iram Fashion Ltd | Wholesale & retail | 2025 |
| Iranian Civil Community CIC | Health & social care | 2026 |
| Irepairbodywork Limited | Wholesale & retail | 2023 |
| Iris Property Investments Limited | Real estate | 2019 |
| Irouters Ltd | Real estate | 2025 |
| Irsaz Letting Ltd | Real estate | 2022 |
| Irsaz Ltd | Wholesale & retail | 2021 |
| Ishanaa Ltd | Professional & scientific | 2019 |
| Isher Electricals Ltd | Construction | 2024 |
| Isher Roofing Limited | Construction | 2025 |
| Ishervon Ltd | Construction | 2016 |
| Isis Beauty Clinic Limited | Other services | 2016 |
| Isleworth Aesthetic Medicine Clinic Limited | Health & social care | 2018 |
| Ismi IT Ltd | Construction | 2023 |
| ISQ Property Management Ltd | Real estate | 2023 |
| Israr Transports Ltd | Transport & logistics | 2022 |
| Istakham Limited | Construction | 2017 |
| Istanbul City Kebab Limited | Hospitality | 2023 |
| IT List Ltd. | Wholesale & retail | 2026 |
| IT Web Ltd | Information & communication | 2025 |
| ITA Secretaries Limited | Professional & scientific | 2000 |
| ITC Employment Service Ltd | Administrative & support | 2022 |
| Ithreeb Limited | Households | 2024 |
| ITQ Analysis Limited | Information & communication | 2014 |
| ITS 4 Brothers Limited | Wholesale & retail | 2025 |