| Hydrotops the Next Generation Limited | Manufacturing | 2008 |
| Hyperion Pharma Services Limited | Professional & scientific | 2018 |
| I Deal Extensions Ltd | Construction | 2021 |
| I.D. Bond Independent Financial Services Limited | Other services | 1997 |
| I.T Trade Station Limited | Information & communication | 2012 |
| Iain Willcox Limited | Professional & scientific | 2015 |
| IAN Jones Golf Services Limited | Arts & recreation | 2011 |
| IAN Strachan Communications Limited | Administrative & support | 2004 |
| Ibridge Software Ltd | Information & communication | 2026 |
| Icad Energy Surveys Ltd | Construction | 2018 |
| Icad Ltd | Construction | 2019 |
| Icon Motor Group Ltd | Wholesale & retail | 2024 |
| Icon Renovations Ltd | Administrative & support | 2023 |
| Ideal Building and Construction Limited | Construction | 2025 |
| Ideal Rental Properties Limited | Real estate | 2020 |
| Ideal Roofing & Cladding Limited | Construction | 2022 |
| IGT Holdings Ltd | Professional & scientific | 2018 |
| Imagination Station Rugeley Limited | Arts & recreation | 2023 |
| IN Demand Installations Ltd | Construction | 2021 |
| Ind.Vac.Screen Printing Limited | Manufacturing | 1973 |
| Indiana Property Investments Limited | Financial services | 2024 |
| Industrial Coating Services Steelwork Limited | Extraterritorial | 2021 |
| Infinitii Construction Limited | Construction | 2025 |
| Infinitii Developments Limited | Construction | 2024 |
| Innerspace Renovations Ltd | Construction | 2023 |
| Insight Process Engineering Limited | Administrative & support | 2011 |
| Insight Process Holdings Limited | Financial services | 2024 |
| Inspire Creative Business Solutions Limited | Professional & scientific | 2003 |
| Inspired Diagnostics Limited | Health & social care | 2005 |
| Instant Space (UK) Limited | Construction | 2004 |
| Instant Space Construct Ltd | Construction | 2011 |
| Integral Training Solutions Ltd | Professional & scientific | 2006 |
| Intelligent Education Solutions Limited | Education | 2014 |
| Interpaints Limited | Construction | 2019 |
| Interpreter 7 Days Ltd | Professional & scientific | 2024 |
| Investment Checkers Ltd | Other services | 2024 |
| Iprosports International Limited | Wholesale & retail | 2013 |
| Irida Consulting Limited | Other services | 2023 |
| Isaac Poulton Limited | Information & communication | 2020 |
| Isoma Conveyors Limited | Extraterritorial | 2006 |
| Istanbul Barber Rugeley Ltd | Other services | 2025 |
| Italian Express Rugeley Ltd | Hospitality | 2020 |
| Ivetsey Mews Management Ltd | Households | 2025 |
| IVY Facility Maintenance Ltd | Manufacturing | 2025 |
| J & L Properties & Investments Ltd | Real estate | 2025 |
| J & N at CAB Ltd | Hospitality | 2013 |
| J C Norman Transcription Ltd | Public administration | 2003 |
| J G Farm Supplies Ltd | Agriculture & fishing | 2015 |
| J M Hopley Farms Ltd | Agriculture & fishing | 2016 |
| J P Alternative Education Limited | Education | 2018 |
| J Parker Design Consultancy Ltd | Professional & scientific | 2024 |
| J Robathan Plumbing & Heating Limited | Construction | 1999 |
| J T Roofing Services Ltd | Construction | 2019 |
| J Terry Monumental Masons Ltd | Other services | 2021 |
| J Waddell Heating and Boiler Specialist Limited | Construction | 2016 |
| J Whitehead Builders Ltd | Construction | 2024 |
| J&K Plasterers Ltd | Construction | 2015 |
| J&M Scaffolding Midlands Ltd | Construction | 2019 |
| J.B. & SON Plant Hire Ltd | Administrative & support | 2021 |
| J.F.B Building Ltd | Construction | 2025 |
| J.F.E. Attridge (Scaffolding Services) Co. Limited | Construction | 1972 |
| J.H.Heathcote Limited | Agriculture & fishing | 1959 |
| J.L. Brown Enterprises Ltd | Hospitality | 2022 |
| J.L. Brown Ltd | Professional & scientific | 2001 |
| J.W.R. Financial Services Ltd | Professional & scientific | 2023 |
| Jabrose Limited | | 1980 |
| Jacks Barber Rugeley Ltd | Other services | 2022 |
| Jalfred Properties Limited | Households | 1972 |
| Jambond Property Ltd | Real estate | 2022 |
| James Beattie Limited | Information & communication | 2021 |
| James Furnishers Limited | Wholesale & retail | 2011 |
| Jane Knight Mobile Foot Care Ltd | Health & social care | 2025 |
| Jayler Ltd | Arts & recreation | 2024 |
| JBA Fibre Limited | Information & communication | 2024 |
| JC Flooring Ltd | Construction | 2016 |
| Jcmr Investment Holdings Limited | Real estate | 2023 |
| JD Enterprizes Ltd | Wholesale & retail | 2022 |
| JDB Construction Limited | Construction | 2006 |
| JE Timber Ltd | Manufacturing | 2023 |
| JEH Home Improvements Limited | Construction | 2016 |
| JEM Law Limited | Professional & scientific | 2014 |
| Jeml Property Development Ltd | Real estate | 2022 |
| Jenkins Bespoke Joinery Ltd | Construction | 2026 |
| JET Fit Ltd | Construction | 2022 |
| Jfan Property Limited | Real estate | 2017 |
| Jgweld Ltd | Manufacturing | 2022 |
| Jim's Gym Coaching Ltd | Other services | 2025 |
| Jim's Gym Kitchen Ltd | Hospitality | 2024 |
| JIP Consulting Limited | Professional & scientific | 2018 |
| JIP Property Investments Limited | Real estate | 2016 |
| Jjeo Holdings Ltd | Financial services | 2025 |
| JK Midlands Property Services Ltd | Construction | 2023 |
| JL Investment Group Limited | Financial services | 2018 |
| Jldh Education Services Ltd | Education | 2023 |
| JM Repointing Ltd | Construction | 2024 |
| JMW Accounting Limited | Professional & scientific | 2025 |
| John Joyce-O’Keeffe Ltd | Education | 2024 |
| Johnson Automotive Transport Limited | Transport & logistics | 2021 |
| Jolovana Ltd | Real estate | 2018 |
| Joseph Construction Limited | Construction | 2001 |