| Imjustshisha Ltd | Other services | 2020 |
| IML Transport Services Limited | Transport & logistics | 2016 |
| IMM Technical Ltd | Manufacturing | 2010 |
| Immigration LAB Ltd | Professional & scientific | 2025 |
| Immortal Rider Ltd | Wholesale & retail | 2025 |
| Imna Ltd | Wholesale & retail | 2025 |
| IMO Electrical Ltd | Construction | 2021 |
| Imotec Developments Limited | Construction | 2007 |
| Impact Education Consulting Ltd | Education | 2026 |
| Impact Environmental Ltd | Water & waste | 2012 |
| Impact Property Services Derby Ltd | Construction | 2000 |
| Impactus Care Ltd | Public administration | 2023 |
| Impart Links Limited | Professional & scientific | 2000 |
| Impart Links Maintain Limited | Extraterritorial | 2007 |
| Impart Links Property Limited | Real estate | 2025 |
| Impavida Management Solutions Ltd. | Professional & scientific | 2013 |
| Imperial 988 Limited | Hospitality | 2025 |
| Imperial Beauty Ltd. | Other services | 2018 |
| Imperial Cleaning Ltd | Administrative & support | 2019 |
| Imperial Kitchen Derby Ltd | Hospitality | 2020 |
| Imperium Fight Performance Systems Ltd | Education | 2018 |
| Impey Consulting Limited | Professional & scientific | 2026 |
| Import Partners Limited | Other services | 2004 |
| Impress Film Group Ltd | Information & communication | 2024 |
| Impress Video Ltd | Information & communication | 2019 |
| Improved Dwellings Limited | Real estate | 2020 |
| IMS Building Management Ltd | Construction | 2014 |
| Imtiaz Traderz Ltd | Wholesale & retail | 2024 |
| IN Crust WE Trust Ltd | Hospitality | 2025 |
| IN Peak Health Limited | Health & social care | 2008 |
| IN Recruiting Ltd | Administrative & support | 2023 |
| IN Training Ltd | Education | 2022 |
| INA (Derby) Ltd | Real estate | 2026 |
| INA Atelier Limited | Manufacturing | 2024 |
| Inara Ltd | Real estate | 2021 |
| Ince Joinery and Building Services Limited | Real estate | 2021 |
| Inceptum Novum Limited | Financial services | 2016 |
| Incite Interiors Limited | Manufacturing | 2008 |
| Include - Hepworth Park Limited | Education | 2025 |
| Include - West Bars Limited | Education | 2025 |
| Include Coventry Lane Limited | Education | 2025 |
| Include Derby City Limited | Education | 2025 |
| Include Education Group Limited | Education | 2025 |
| Include Education Ltd | Education | 2024 |
| Include Mercia Limited | Education | 2025 |
| Include Restoration and Development Limited | Construction | 2025 |
| Include Welby Grange Limited | Education | 2025 |
| Inclusive Home Care Ltd | Health & social care | 2020 |
| Inco Architecture & Project Management Limited | Construction | 2023 |
| Incora UK Holdco Limited | Financial services | 2025 |
| Incy Wincy Properties Limited | Hospitality | 2013 |
| IND Property Ltd | Real estate | 2025 |
| Indalo Investments Ltd | Hospitality | 2026 |
| Inde Rose Ltd | Wholesale & retail | 2024 |
| Indenpendent Vehicle Inspections Ltd | Extraterritorial | 2021 |
| Independence 1776 Ltd | Real estate | 2024 |
| Independence Goals UK Limited | Health & social care | 2022 |
| Independent Directories Limited | Information & communication | 2007 |
| Independent Freelance Transport Ltd | Transport & logistics | 2018 |
| Independent Investment Holdings 003 Limited | Education | 2025 |
| Independent Lifestyles Support Services 2022 Limited | Health & social care | 2022 |
| Independent Living for Deaf People CIC | Real estate | 2024 |
| Independent Motor Company Limited | Wholesale & retail | 1999 |
| Indi-Pendent Plant Sales Limited | Mining & quarrying | 2005 |
| Indie Rigs Ltd | Information & communication | 2025 |
| Indigo (Eco) Ltd | Agriculture & fishing | 2021 |
| Indigo OX Limited | Professional & scientific | 2019 |
| Indigo Projects Limited | Professional & scientific | 2026 |
| Indo PAK Cargo Services Limited | Transport & logistics | 2025 |
| Indrino Ltd | Hospitality | 2025 |
| Industrial Machine Maintenance & Supplies Ltd | Manufacturing | 2009 |
| Industrial Process Pumps Limited | Manufacturing | 1987 |
| Industrial Process Services Limited | Professional & scientific | 1989 |
| Indya Consulting Limited | Information & communication | 2016 |
| Inertia Consulting (Birmingham) Limited | Professional & scientific | 2012 |
| Inertia Consulting (Civil Engineering) Limited | Professional & scientific | 2021 |
| Inertia Consulting (North) Limited | Professional & scientific | 2021 |
| Inertia Consulting (South) Limited | Professional & scientific | 2021 |
| Inertia Consulting Limited | Professional & scientific | 2006 |
| Inez Giving Limited | Arts & recreation | 2025 |
| Infant Essentials Ltd | Manufacturing | 2025 |
| Infasol Limited | Information & communication | 2014 |
| Infinico Derby Ltd | Arts & recreation | 2025 |
| Infinita Ltd | Information & communication | 2010 |
| Infinite Electrical Services Limited | Manufacturing | 2019 |
| Infinite Flow & Radiance Ltd | Other services | 2025 |
| Infinite Interiors Derby Limited | Construction | 2024 |
| Infinite Mobile Carwash & Detailing Ltd | Administrative & support | 2025 |
| Infinitely Clean Derby Ltd | Administrative & support | 2025 |
| Infiniti Media Group Limited | Information & communication | 2017 |
| Infiniti Media Limited | Professional & scientific | 2020 |
| Infinity Dance Academy Limited | Education | 2023 |
| Infinity Flow Ltd | Professional & scientific | 2022 |
| Infinity Media Ltd | Information & communication | 2026 |
| Infinity Mode Limited | Wholesale & retail | 2025 |
| Infinity Search Ltd | Administrative & support | 2023 |
| Infinity Technology Group Ltd | Professional & scientific | 2026 |
| Infinity Vans Limited | Wholesale & retail | 2022 |
| Infinium Investments Ltd | Real estate | 2026 |
| Influence & Inspire Community Interest Company | Hospitality | 2021 |