| HR Academy Ltd. | Administrative & support | 2015 |
| HRF Consulting Ltd | Information & communication | 2020 |
| HS2M Ltd | Construction | 2012 |
| HT Real Estate Limited | Real estate | 2017 |
| Hub HOP Group Ltd | Transport & logistics | 2021 |
| HUI JIN Limited | Health & social care | 2006 |
| Hunt Kennel Management Company Limited | Households | 1992 |
| Huntingdon House Estates (Ashby DE LA Zouch) Limited | Real estate | 2026 |
| Huntingdon House School Ltd | Education | 2024 |
| HUT SIX Ltd | Information & communication | 1999 |
| HVW8 Ltd | Professional & scientific | 2013 |
| Hylo Consultancy Ltd | Other services | 2018 |
| I & W Property Development Ltd | Real estate | 2010 |
| I a Moreland Limited | Construction | 2006 |
| I Builder London Ltd | Construction | 2013 |
| I C Oils Limited | Administrative & support | 2011 |
| I Love Crepes Limited | Hospitality | 2011 |
| I Riley Limited | Financial services | 2016 |
| I'M Your Coach Ltd | Professional & scientific | 2017 |
| I.P.O.M Ltd | Construction | 2019 |
| IAN Earl Ltd | Agriculture & fishing | 2004 |
| Ibestco Ltd | Financial services | 2005 |
| IBO Shaw Property Ltd | Real estate | 2023 |
| Icandoit Learning Limited | Education | 2018 |
| Icars Ashby Ltd | Transport & logistics | 2024 |
| IGL Limited | Financial services | 2018 |
| IIB Financial Services Ltd | Financial services | 2014 |
| IIB Holdings Limited | Professional & scientific | 2022 |
| Impact HE Ltd | Professional & scientific | 2026 |
| Impactepm Limited | Information & communication | 2019 |
| Incredible Kids (Ashby) Limited | Health & social care | 2015 |
| Incredible Kids (Derby) Limited | Health & social care | 2003 |
| Incredible Kids Limited | Financial services | 2013 |
| Independent Medico-Legal Expert Reports Ltd | Information & communication | 2026 |
| Indeva Ltd. | Professional & scientific | 1989 |
| Indigo Seventeen Ltd | Professional & scientific | 2018 |
| Indivijilly Limited | Professional & scientific | 2015 |
| Industria Solutions Limited | Professional & scientific | 2017 |
| Industrial Trading Solutions Limited | Wholesale & retail | 2002 |
| Infotec Holdings Limited | Manufacturing | 2006 |
| Infotec Limited | Manufacturing | 1992 |
| Infy IT Consulting Ltd | Information & communication | 2021 |
| Inkbox Creative Limited | Administrative & support | 2018 |
| INNOV8IVE Property Management Ltd | Real estate | 2017 |
| Inspireyouth Collective CIC | Education | 2024 |
| Instratum Limited | Administrative & support | 2007 |
| Intaglio Creative Limited | Manufacturing | 2013 |
| Integrated Ordering Systems Limited | Information & communication | 2000 |
| Integrated Technologies (International) Limited | Extraterritorial | 1999 |
| Intellisys Solutions Limited | Information & communication | 2000 |
| International Tool Company Limited | Manufacturing | 1994 |
| Invest in Prosperity Limited | Real estate | 2023 |
| Invinitive Nominee Ltd | Financial services | 2022 |
| Invinitive Trustees Ltd | Financial services | 2021 |
| ITC Direct Ltd | Manufacturing | 2012 |
| Ivanhoe Properties Ltd. | Real estate | 2013 |
| IW Press Ltd | Information & communication | 2020 |
| Iziah Holdings Ltd | Real estate | 2020 |
| Iziah Properties Ltd | Real estate | 2024 |
| J & D Estate Holdings Ltd | Real estate | 2024 |
| J & W Project Services Limited | Professional & scientific | 2023 |
| J a Hunt Plumbing and Heating Ltd | Construction | 2024 |
| J D Produce Limited | Wholesale & retail | 2015 |
| J England Consultancy Services Ltd | Professional & scientific | 2024 |
| J Furner & SON Construction Services Ltd | Construction | 2025 |
| J Gardner Plant Limited | Administrative & support | 2014 |
| J J M Planning Ltd | Professional & scientific | 2021 |
| J Kelly Paving and Construction Limited | Construction | 2018 |
| J L Surveyors Ltd | Professional & scientific | 2022 |
| J S C Crozza Limited | Manufacturing | 2012 |
| J V Steel Limited | Financial services | 2019 |
| J. C. Oldbury Office for Design Ltd | Professional & scientific | 2022 |
| J.O.G. Contractors Limited | Construction | 2007 |
| Jack Loggin Holdings Limited | Real estate | 2023 |
| Jack Loggin Limited | Construction | 1990 |
| Jacobswell Farm Holdings Ltd | Financial services | 2017 |
| Jaime Powell Property Group Limited | Real estate | 2025 |
| JAM Triangle Ltd | Real estate | 2023 |
| James Pepper Limited | Construction | 2014 |
| Jane Bryan Properties Ltd | Hospitality | 2015 |
| JAY Alexis Aesthetics Ltd | Health & social care | 2026 |
| JB Engineering Technical Services Limited | Professional & scientific | 2015 |
| JB Marketing & Communications Limited | Professional & scientific | 2025 |
| JBH Acquisitions Limited | Financial services | 2024 |
| Jbld Holdings Ltd | Financial services | 2025 |
| JC Consulting Solutions Limited | Professional & scientific | 2017 |
| JC Fitness Studios Ltd | Arts & recreation | 2014 |
| JC Horton Ltd | Professional & scientific | 2015 |
| JC Property & Consultancy Ltd | Real estate | 2026 |
| JC Property and Services Limited | Real estate | 2024 |
| JC3 Building Services Limited | Construction | 2025 |
| JCK Nouri Consulting Limited | Information & communication | 2014 |
| JCP Bookkeeping Ltd | Professional & scientific | 2024 |
| JCS Electrical Limited | Real estate | 2002 |
| Jctm Services Ltd | Professional & scientific | 2014 |
| JD Installations (Midlands) Ltd | Construction | 2009 |
| JDP Engineering Ltd | Manufacturing | 2022 |
| Jeans Enterprises Limited | Real estate | 2014 |
| JEM Managment Ltd | Professional & scientific | 2025 |
| Jenner Associates Ltd | Professional & scientific | 2021 |