| High Street Auto Centre Ltd | Wholesale & retail | 2000 |
| Higham Press Limited | Manufacturing | 1973 |
| Hill & Mason Windows,Doors & Glazing Ltd | Construction | 2021 |
| Hillsmede Maintenance Company Limited | Households | 2020 |
| Hindsight Services Limited | Professional & scientific | 2021 |
| Hiregiant Ltd | Administrative & support | 2019 |
| HJ Spares Ltd | Wholesale & retail | 2020 |
| Hkekrk Ltd | Households | 2025 |
| HKR Express Limited | Transport & logistics | 2025 |
| Hl&Hc Ltd | Transport & logistics | 2023 |
| HMR Hair Ltd | Other services | 2023 |
| Holland's of Derbyshire Limited | Construction | 2023 |
| Holly Tree Craft Limited | Manufacturing | 2022 |
| Holly Tree Trading Company Ltd | Real estate | 2026 |
| Holymoor Riding School Ltd | Arts & recreation | 2019 |
| Homeguard Plumbing & Heating Ltd | Construction | 2013 |
| Homes 4 Homes Ltd | Real estate | 2022 |
| Honeystone Properties and Co Limited | Real estate | 2024 |
| Hong Kong Alfreton Ltd | Hospitality | 2024 |
| Hope Builds Ltd | Construction | 2025 |
| Hope in Action CIC | Education | 2026 |
| Hopfrog HR Limited | Professional & scientific | 2013 |
| Horsepool Estates Ltd | Real estate | 2025 |
| Horsepool Property Holdings (HPH) Ltd | Real estate | 2020 |
| Horsepools Estate Planning Limited | Professional & scientific | 2025 |
| Horsepools Legal Costs Ltd | Professional & scientific | 2012 |
| Host of the Companies Limited | Administrative & support | 2025 |
| Hot Ice Interiors Limited | Manufacturing | 1995 |
| House of Finesse (Alfreton) Limited | Other services | 2020 |
| Howard Composite Ltd | Professional & scientific | 2024 |
| Howe Software Solutions Limited | Information & communication | 2010 |
| HPC Group Limited | Professional & scientific | 1996 |
| HSH Contracting Limited | Professional & scientific | 2024 |
| Hucknall Driving School Ltd | Education | 2025 |
| Hudson Aurora Holdings Limited | Professional & scientific | 2025 |
| Hudson Aurora Properties Ltd | Real estate | 2025 |
| Hunt 4 Spares Limited | Wholesale & retail | 2016 |
| Hunt Scaffolding Ltd | Construction | 2023 |
| Hunt's of London Limited | Other services | 1998 |
| Hunts Welding and Fabrication Ltd | Manufacturing | 2023 |
| Hurst Homes Limited | Real estate | 2014 |
| Husky Aluminium Ltd | Manufacturing | 2023 |
| HW Martin Fencing and Forestry Limited | Construction | 1976 |
| HW Martin Fleet Maintenance Limited | Manufacturing | 1980 |
| HW Martin Holdings Limited | Professional & scientific | 1994 |
| Hydro Aluminium UK Limited | Manufacturing | 1969 |
| Hydro-Gen Consult Ltd | Professional & scientific | 2020 |
| Hydrocure Wraps Ltd | Health & social care | 2024 |
| I CAN SEE the Stage From Here Limited | Information & communication | 2012 |
| I.G.N. Property Ltd | Construction | 2020 |
| Iansprint Limited | Manufacturing | 2006 |
| Ibex Retail Limited | Wholesale & retail | 2015 |
| ICAD345 Ltd | Professional & scientific | 2019 |
| Icon Celebrity Events Ltd | Arts & recreation | 2026 |
| Iconic British Brands Limited | Wholesale & retail | 2024 |
| IDL Systems Limited | Administrative & support | 2001 |
| IGO Aesthetics Limited | Wholesale & retail | 2024 |
| Ilam Stone Limited | Manufacturing | 1999 |
| Image Printing Company Limited | Manufacturing | 1993 |
| Images of Derbyshire Limited | Construction | 2021 |
| Implementation Management Solutions Limited | Information & communication | 2015 |
| In-Credible Solutions Limited | Transport & logistics | 2017 |
| Inclumed Research and Consultancy Ltd | Information & communication | 2022 |
| Independent Psychiatric Consultancy Limited | Health & social care | 2010 |
| Indulge & Glow Ltd | Other services | 2025 |
| Infrastructure Network Solutions Limited | Extraterritorial | 2014 |
| Infusion Desserts Ltd | Hospitality | 2024 |
| ING Associates Limited | Real estate | 2018 |
| Innovate Electrical Contractors Limited | Construction | 2010 |
| Inovasi Ltd | Professional & scientific | 2020 |
| Inspire Energy Associates CME Ltd | Energy | 2025 |
| Inspire Energy CME Limited | Manufacturing | 2020 |
| Inspired Homes Limited | Construction | 2011 |
| Integrated Process Control Limited | Administrative & support | 1996 |
| Integrated Property Holdings Ltd | Real estate | 2018 |
| Integrity Vision Limited | Health & social care | 2023 |
| Intergienia Ltd | Construction | 2020 |
| Interlec Chesterfield Limited | Manufacturing | 2007 |
| International Academy of Music Education Ltd | Extraterritorial | 2016 |
| Internet Connections Ltd | Information & communication | 2002 |
| Invirobuild Limited | Construction | 2010 |
| Ironbond Brickwork Ltd | Construction | 2026 |
| Isentropic Ltd | Information & communication | 2024 |
| Ivanov Express Ltd | Transport & logistics | 2025 |
| IVY Rose Properties Limited | Real estate | 2022 |
| J & H Rentals Limited | Administrative & support | 2000 |
| J & L Response Limited | Construction | 2013 |
| J D (UK) Limited | Wholesale & retail | 2001 |
| J Hemingray Limited | Construction | 2021 |
| J Porteous QA Limited | Administrative & support | 2009 |
| J R Melrose Building Contractor Limited | Construction | 2003 |
| J T I Prestige & Performance Limited | Administrative & support | 2004 |
| J&A Property Maintenance Ltd | Construction | 2022 |
| J&A Roofing Services (Derbyshire) Ltd | Construction | 2024 |
| J&H Technology Limited | Information & communication | 2016 |
| J.J.Cummins Limited | Real estate | 1961 |
| J.J.R. Pro Property Development Ltd | Extraterritorial | 2023 |
| J.K.W. Refinishing Supplies Limited | Wholesale & retail | 1990 |
| J.S. Structures Limited | Construction | 2009 |
| J.Young Flooring Limited | Construction | 2005 |