| Growth Bridge Consultancy Ltd | Professional & scientific | 2025 |
| GSC Consultancies Holdings Ltd | Financial services | 2024 |
| GUY Dainter Limited | Manufacturing | 2015 |
| H Rohland Limited | Professional & scientific | 2016 |
| H&G Enterprises Ltd | Other services | 2019 |
| H&Lwp Ltd | Real estate | 2025 |
| Hadley Services Ltd | Manufacturing | 2020 |
| Hall & Gold Ltd | Real estate | 2019 |
| Hall Engineering and Design Limited | Manufacturing | 2003 |
| Harballe Investments Ltd | Real estate | 2024 |
| Harrison & SON Estates Ltd | Real estate | 2026 |
| Harry Bloor Racing Ltd | Arts & recreation | 2026 |
| Hart's Couriers Limited | Transport & logistics | 2025 |
| Harvey Real Estate Limited | Real estate | 2017 |
| Hatton Warwick Limited | Other services | 2024 |
| Hayesit Ltd | Information & communication | 2021 |
| Haynes Meadow Limited | Agriculture & fishing | 2022 |
| Hermitage Hope Limited | Extraterritorial | 2025 |
| Hill Day and Vellam Ltd | Hospitality | 2016 |
| Hill Farm Glamping Limited | Professional & scientific | 2017 |
| Holdan Investment International Ltd | Administrative & support | 2019 |
| Holt Farm Holdings Ltd | Arts & recreation | 2025 |
| Holywell Surveyors Limited | Professional & scientific | 2022 |
| Honesberie Sporting Limited | Arts & recreation | 2024 |
| Honesty Bars Ltd | Hospitality | 2025 |
| Honey BEA Beauty Limited | Other services | 2026 |
| Hosten Limited | Information & communication | 2013 |
| HSK Gardening & Leisure Ltd | Wholesale & retail | 2020 |
| Huff Landscapes Ltd | Administrative & support | 2026 |
| Humphreys Management Ltd | Real estate | 2017 |
| Hundred Hectare Environmental Ltd | Agriculture & fishing | 2025 |
| Hyma Fitness Limited | Wholesale & retail | 2023 |
| IAN Benbow Limited | Wholesale & retail | 2005 |
| IAN Kimberley Accounting Services Limited | Professional & scientific | 2010 |
| Iceray Ltd. | Professional & scientific | 2015 |
| IF HR Solutions Limited | Information & communication | 2020 |
| Ignition Projects Limited | Professional & scientific | 2025 |
| Ilex Radiology Ltd | Health & social care | 2022 |
| Impostor Limited | Professional & scientific | 2024 |
| Inchyra Ltd | Transport & logistics | 2018 |
| Inclusion Healthcare Limited | Health & social care | 2018 |
| Indulgence Events Limited | Hospitality | 2025 |
| Inn-Credible PUB Co - the Duck Ltd | Hospitality | 2019 |
| Innovaite LAB Ltd | Information & communication | 2025 |
| Innovatia Hospitality Limited | Administrative & support | 2011 |
| Innovum Consulting Limited | Professional & scientific | 2017 |
| Inside Homes Limited | Real estate | 2014 |
| Inside Homes Southam Limited | Real estate | 2022 |
| Insight Park (Phase 1) Management Limited | Real estate | 2012 |
| Insight Park (Phase 2) Management Limited | Real estate | 2014 |
| Insight Park (Phase 3) Management Limited | Households | 2020 |
| Insight Park Management Limited | Real estate | 2012 |
| Inspire Homes (Southam) Limited | Real estate | 2016 |
| Install Fit Solutions Ltd | Construction | 2025 |
| Integrity Homes Limited | Construction | 2019 |
| Intellect-Uk Limited | Information & communication | 2015 |
| Interlock Surveying Limited | Extraterritorial | 2014 |
| Interlocks Surveys Limited | Professional & scientific | 2016 |
| International Market Development Ltd | Other services | 2020 |
| Internet Recruitment Limited | | 2011 |
| Interplace Solutions Ltd | Health & social care | 2019 |
| IP Building Services Limited | Construction | 2001 |
| IPR Protection Limited | Administrative & support | 2014 |
| Ironstone Surveyors Limited | Professional & scientific | 2026 |
| Iterpro Group International Limited | Information & communication | 2018 |
| J Darling Estates Limited | Construction | 2019 |
| J J Fitzmaurice Ltd | Transport & logistics | 2025 |
| J N Williams Ltd | Real estate | 2021 |
| J&E Capital Holding Ltd | Construction | 2026 |
| J&T PUB Co Ltd | Hospitality | 2024 |
| J.Gulliver Limited | Administrative & support | 2007 |
| J.M.T. Engineering (Ladbroke) Limited | Agriculture & fishing | 2003 |
| JAC Business Solutions Limited | Professional & scientific | 2005 |
| Jacqueline the Florist Limited | Wholesale & retail | 2020 |
| James M Hartwell Ltd | Administrative & support | 2014 |
| James Vito Limited | Hospitality | 2010 |
| Jamie's TA Lakeside Ltd | Hospitality | 2026 |
| Jaxx the MIX UK Limited | Wholesale & retail | 2025 |
| Jaydo Engineering Ltd | Professional & scientific | 2016 |
| JB Southside Ltd | Information & communication | 2008 |
| JCB and SON Holdings Ltd | Construction | 2021 |
| JCB and SON Ltd. | Construction | 2016 |
| JCB Facilities Management Ltd | Manufacturing | 2024 |
| JCB Fire Ltd | Manufacturing | 2022 |
| JCB Group Management Ltd | Professional & scientific | 2025 |
| JCB Interiors Ltd | Construction | 2023 |
| JCB Mechanical Ltd | Manufacturing | 2022 |
| JCB Passive Fire Ltd | Public administration | 2025 |
| JCB Property Developments Ltd | Financial services | 2024 |
| JCB Renewables Ltd | Construction | 2024 |
| Jdee Global Enterprises Limited | Transport & logistics | 2024 |
| Je&Sj Properties Ltd | Real estate | 2014 |
| Jefferson Capital Ltd | Professional & scientific | 2025 |
| Jefferson Designs Ltd | Professional & scientific | 2011 |
| Jefferson Finance Limited | Professional & scientific | 2020 |
| Jefferson Projects Ltd | Professional & scientific | 2025 |
| JGV Investments Limited | Real estate | 2022 |
| Jimbo Enterprises Limited | Administrative & support | 2021 |
| Jmac Building Services Limited | Construction | 2012 |
| JML Commercial Properties Ltd | Real estate | 2022 |