| Iconic Beauty Ltd | Wholesale & retail | 2025 |
| Iconic Paradise Ltd | Wholesale & retail | 2025 |
| ICT Wave Limited | Information & communication | 2017 |
| ID Shine Limited | Administrative & support | 2015 |
| ID Trade Ltd | Construction | 2017 |
| Id&Co 2019 Ltd | Transport & logistics | 2019 |
| IDA Holdings Ltd | Financial services | 2021 |
| IDA Joinery Ltd | Manufacturing | 2018 |
| Idanr Media Games Limited | Information & communication | 2025 |
| IDD Investment Properties Ltd | Real estate | 2025 |
| Ideal Build Developments Limited | Construction | 2025 |
| Ideal Electricians Ltd | Construction | 2024 |
| Ideal Electrics Limited | Construction | 2019 |
| Ideal Essex Engineering Ltd | Construction | 2023 |
| Ideal Heating Solutions Ltd | Construction | 2017 |
| Ideal Konsult Limited | Information & communication | 2022 |
| Ideally Accounting Ltd | Professional & scientific | 2020 |
| Ideally Properties Ltd | Real estate | 2022 |
| Identity Group of Company Limited | Hospitality | 2023 |
| IDM Matei Ltd | Construction | 2017 |
| Idris Integrated Systems Ltd | Other services | 2023 |
| IDS Logistics Limited | Transport & logistics | 2015 |
| IDS Plasterwork Limited | Construction | 2013 |
| Idylle World Limited | Public administration | 2024 |
| Idyllic Building Services Ltd | Construction | 2023 |
| Idyllic IT Solutions Ltd | Information & communication | 2023 |
| Idyllichomecare Ltd | Health & social care | 2022 |
| IDZ Management Ltd | Information & communication | 2023 |
| Ieii Ltd | Construction | 2024 |
| Ifix Accessories Ltd | Information & communication | 2020 |
| Ifix Parts Ltd | Other services | 2015 |
| Ifoglobal Ltd | Education | 2022 |
| IFY Ventures Limited | Administrative & support | 2025 |
| IG Autoparts Limited | Wholesale & retail | 2020 |
| IG8 Properties Ltd | Real estate | 2025 |
| IGB Construction Ltd | Construction | 2025 |
| IGE Construction Ltd | Manufacturing | 2021 |
| Iggy Health Limited | Health & social care | 2019 |
| Ignis Protocol Ltd | Professional & scientific | 2026 |
| Ignite Venture Travel Ltd | Administrative & support | 2025 |
| IGR Care Services Ltd | Health & social care | 2024 |
| Igwe Omenyili Limited | Other services | 2025 |
| IH Consultancy Services Ltd | Professional & scientific | 2018 |
| IHD Group Ltd | Real estate | 2024 |
| Ihims Limited | Health & social care | 2019 |
| Ihsan Tutors Limited | Education | 2025 |
| II Real Estate Ltd | Real estate | 2022 |
| II Tech Ltd | Information & communication | 2026 |
| Ij&Co Limited | Health & social care | 2022 |
| Ijemeka Limited | Health & social care | 2018 |
| Ijeshatedo Grammar School Old Students Union Ltd | Other services | 2020 |
| Ijeve Designs Limited | Arts & recreation | 2010 |
| IJN Collective Ltd | Administrative & support | 2024 |
| IK Plaster Ltd | Construction | 2024 |
| IKE & Sons Ltd | Construction | 2016 |
| Ikefab Limited | Professional & scientific | 2021 |
| IKH Builders Limited | Construction | 2024 |
| Ikhb Limited | Health & social care | 2024 |
| Ikikai Coffee Ltd | Wholesale & retail | 2019 |
| Ikogwe International UK Limited | Wholesale & retail | 2025 |
| Ikra Distribution Ltd | Wholesale & retail | 2023 |
| Ilford Electricians Ltd | Energy | 2020 |
| Ilford Food and VEG UK Ltd | Wholesale & retail | 2025 |
| Ilford Key Cutting Limited | Other services | 2022 |
| Ilford Lane COM Limited | Information & communication | 2019 |
| Ilfordas Builders Ltd | Construction | 2017 |
| Ilie's Company Ltd | Construction | 2022 |
| Ilja Sutika Ltd | Construction | 2023 |
| Ilmi & Sons Ltd | Construction | 2022 |
| Ilmwise Ltd | Education | 2017 |
| ILO Care Ltd | Administrative & support | 2019 |
| Ilorin Market Ltd | Wholesale & retail | 2023 |
| Image by Sandra Limited | Other services | 2019 |
| Imall Cart Ltd | Wholesale & retail | 2025 |
| Imani Holdings Ltd | Transport & logistics | 2018 |
| Imco Consulting Limited | Health & social care | 2009 |
| Imgcr Limited | Construction | 2018 |
| Imhh UK Limited | Health & social care | 2015 |
| IMI Building Contractors Ltd | Administrative & support | 2017 |
| IML Cleaning 11 Ltd | Construction | 2025 |
| Immaculate Carpet Cleaning Ltd | Administrative & support | 2025 |
| Immedaite Help UK Ltd | Health & social care | 2018 |
| Immigration 2 UK Limited | Professional & scientific | 2014 |
| Immz's Pizza & Grill Ltd | Hospitality | 2017 |
| IMN FIX Ltd | Construction | 2026 |
| Imod Drive Limited | Transport & logistics | 2011 |
| Imoherbs Ltd | Agriculture & fishing | 2025 |
| Impact Care and Support Services Ltd | Health & social care | 2025 |
| Impact Konsult Ltd | Education | 2020 |
| Imperial Bond Limited | Wholesale & retail | 2021 |
| Imperial Chef Limited | Manufacturing | 2025 |
| Imperial UK Construction Ltd | Construction | 2018 |
| Imperialmac Limited | Transport & logistics | 2025 |
| Imperium Works Ltd | Construction | 2021 |
| Impress Paint Ltd | Construction | 2018 |
| IMS Network Consultant Ltd | Information & communication | 2023 |
| IN Studio Production Ltd | Information & communication | 2023 |
| In-House Products PVT Ltd | Wholesale & retail | 2020 |
| Inaaya Properties Ltd | Real estate | 2025 |
| Inaaya Property Ltd | Real estate | 2026 |