| HB Carpentry Limited | Construction | 2006 |
| HB Carpentry Rentals Limited | Real estate | 2016 |
| HBK Leisure Limited | Arts & recreation | 2021 |
| HBL907 Limited | Real estate | 2019 |
| HCH Cleaning Services Ltd | Administrative & support | 2023 |
| Hcrp Limited | Wholesale & retail | 2003 |
| HD Precision Engineering Limited | Professional & scientific | 2012 |
| HD Properties Ramsey Ltd | Hospitality | 2019 |
| HDC Ventures Limited | Financial services | 2017 |
| Hdcv Security Services Limited | Administrative & support | 2018 |
| HDM Engineering Limited | Manufacturing | 2026 |
| HDW Services Ltd | Professional & scientific | 2023 |
| Heacham Property Development Ltd | Real estate | 2015 |
| Heacham Property Limited | Real estate | 2008 |
| Health and Mobility Limited | Wholesale & retail | 2019 |
| Healthtopia Limited | Health & social care | 2005 |
| Healthwatch Cambridgeshire and Peterborough CIC | Health & social care | 2013 |
| Heartpoint Unity Care Ltd | Health & social care | 2026 |
| Heat Seal Components Ltd | Manufacturing | 2025 |
| Heatcon Composite Systems (Europe) Ltd. | Wholesale & retail | 1995 |
| HEC Huntingdon Electrical Ltd | Construction | 2020 |
| Hedges R-Us Ltd | Agriculture & fishing | 2024 |
| Helen Deverell Communications Limited | Professional & scientific | 2016 |
| Hemingford Associates Ltd | Hospitality | 2012 |
| Hemingford Handyman Ltd | Construction | 2020 |
| Hemingford Horticulture Ltd | Administrative & support | 2023 |
| Hendery Installations Limited | Manufacturing | 2021 |
| Hennie’S Classics Ltd | Wholesale & retail | 2024 |
| Henry Energy Limited | Energy | 2021 |
| Hepher's Limited | Wholesale & retail | 1973 |
| Herbal Remedies Limited | Wholesale & retail | 2003 |
| Hercules Cars Limited | Transport & logistics | 2023 |
| Heritage Brands Incorporated Ltd | Administrative & support | 2022 |
| Heritage Plastering & Building Restoration Limited | Construction | 2021 |
| Herringbone Restoration Ltd | Construction | 2010 |
| Hewitt Windows and Construction Ltd | Construction | 2021 |
| Hewitts Home Renovations Ltd | Construction | 2024 |
| Hexagon Investment Holdings Limited | Administrative & support | 2005 |
| Hexagon Pharma Limited | Wholesale & retail | 2020 |
| HFG Projects Limited | Professional & scientific | 2016 |
| Hfgl Limited | Professional & scientific | 2020 |
| HG Auto Storage Limited | Transport & logistics | 2013 |
| HH Advisory Limited | Professional & scientific | 2018 |
| High Spec Roofing Limited | Construction | 2016 |
| High Spirits Events Ltd | Hospitality | 2024 |
| High Street Homes Limited | Construction | 2007 |
| Highfields Farm Developments Ltd | Construction | 2019 |
| Highlode Mots Ltd | Wholesale & retail | 2026 |
| Highway 61 Consultancy Limited | Professional & scientific | 2019 |
| Highway Claims Recovery Service Limited | Administrative & support | 2021 |
| Highways Management Group Ltd | Administrative & support | 2026 |
| Hill Ephesus Ltd | Hospitality | 2026 |
| Hill Plumbing & Heating Limited | Construction | 2010 |
| Hillside WD3 Limited | Financial services | 2024 |
| Hilton (Hunts) Property Ltd | Administrative & support | 2023 |
| Hilton Feast Week CIC | Arts & recreation | 2022 |
| Hilton Food Solutions Limited | Wholesale & retail | 2015 |
| Hilton Foods Asia Pacific Limited | Extraterritorial | 2012 |
| Hilton Foods Trading Limited | Administrative & support | 2024 |
| Hilton Seafood UK Limited | Extraterritorial | 2023 |
| Hilton Services Limited | Extraterritorial | 2023 |
| Himalaya Traders Ltd | Wholesale & retail | 2017 |
| Hitz Engineering Ltd | Professional & scientific | 2025 |
| Hjlcomposites Ltd | Manufacturing | 2026 |
| HKS Europe Limited | Wholesale & retail | 1996 |
| HMA Media Group Ltd | Transport & logistics | 2022 |
| HMA Property Group Ltd | Real estate | 2026 |
| Hmdt Music | Arts & recreation | 1995 |
| Hnly Advisors Ltd | Information & communication | 2025 |
| HNN Limited | Professional & scientific | 2002 |
| Hobbes Choice Holdings Limited | Financial services | 2023 |
| Hobbes Choice Ltd | Real estate | 2022 |
| Hobbs Property Portfolio Ltd | Real estate | 2021 |
| Hodgson-Jones Developments Limited | Construction | 2017 |
| Hodgson-Jones Holdings Limited | Financial services | 2017 |
| Hodgson-Jones Homes Ltd | Real estate | 2021 |
| Hodgson-Jones Property Limited | Real estate | 1999 |
| Hodgson-Jones Student Homes Ltd | Real estate | 2021 |
| Hodkin Technical Ltd | Professional & scientific | 2018 |
| Hoffman London Ltd | Other services | 2024 |
| Hofmann Megaplan (UK) Limited | Administrative & support | 2004 |
| Holbeach Motors Ltd | Wholesale & retail | 2019 |
| Holborn Consultancy Services Limited | Information & communication | 2010 |
| Holistic Healthcare Agency Ltd | Administrative & support | 2023 |
| Holistic Healthcare Cambridge Ltd | Health & social care | 2020 |
| Holistic Healthcare Franchise Ltd | Administrative & support | 2023 |
| Holistic Healthcare Holdings Ltd | Financial services | 2023 |
| Hollis Industrial Services Limited | Administrative & support | 2005 |
| Holloway Music Ltd | Information & communication | 2021 |
| Hollowstone Limited | Extraterritorial | 2000 |
| Holme FEN Fishery Limited | Agriculture & fishing | 2013 |
| Holmrise Ltd | Construction | 2026 |
| Holywell Group Limited | Financial services | 2017 |
| Home and Office Shine Ltd | Administrative & support | 2025 |
| Home Improvements - Lukasz Zborowski Ltd | Construction | 2023 |
| Home Luxury Ltd | Wholesale & retail | 2026 |
| Home Made Energy Ltd | Construction | 2015 |
| Homesafe Electrical Services Limited | Construction | 2015 |
| Homesafe Solar and Renewables Ltd | Construction | 2023 |
| Honey & White Ltd | Administrative & support | 2013 |