| Greenstead Willow Limited | Construction | 2025 |
| Greenwich London Blinds Ltd | Manufacturing | 2011 |
| Greg Bowles Carpentry Limited | Construction | 2003 |
| Greg Surfacing Ltd | Construction | 2022 |
| Groundwork Flooring Ltd | Construction | 2025 |
| Group 4 Security Limited | Administrative & support | 2012 |
| GRP Factors Limited | Wholesale & retail | 2005 |
| GTE Installations Limited | Construction | 2014 |
| GTL Advisory Limited | Information & communication | 2026 |
| H a Sheikh Enterprises Ltd | Wholesale & retail | 2026 |
| H&S Heritage Homes Ltd | Extraterritorial | 2024 |
| H.C.B Autos Ltd | Wholesale & retail | 2015 |
| HAC Technical Solutions Ltd | Construction | 2014 |
| Haig Court Residents Association Limited | Households | 1969 |
| Hairy Cyclops Ltd | Information & communication | 2012 |
| Halstead 2024 Limited | Professional & scientific | 2010 |
| Halstead Auto Repairs LLP | | 2022 |
| Halstead Boxing & Martial Arts Limited | Arts & recreation | 2014 |
| Halstead Electrical Wholesale Limited | Wholesale & retail | 2001 |
| Halstead Glass Limited | Extraterritorial | 2010 |
| Halstead Press Limited | Arts & recreation | 1972 |
| Halstead Rooms Limited | Hospitality | 2010 |
| Halstead Wharf Management Company Limited | Households | 1987 |
| Halsted Kitchen Ltd | Hospitality | 2025 |
| Hampshire Automotive Consultancy Limited | Wholesale & retail | 2004 |
| Hand Held Audio Limited | Professional & scientific | 1997 |
| Handloom Holdings Limited | Manufacturing | 2015 |
| Hardy Construction and Developments Ltd | Construction | 2026 |
| Harleys Rentals Ltd | Real estate | 2025 |
| Harpprime Limited | Professional & scientific | 1985 |
| Harringtons Architecture and Design Ltd | Professional & scientific | 2015 |
| Harris and Careford Limited | Construction | 1984 |
| Harris Pullen Holdings Limited | Financial services | 2025 |
| Harrogate Tipple Ltd | Wholesale & retail | 2016 |
| Harry Kiddy Contracts Limited | Agriculture & fishing | 2024 |
| Harvair Limited | Transport & logistics | 2000 |
| Harvest Homes Properties Limited | Construction | 1987 |
| Hatton Digital Ltd | Information & communication | 2026 |
| Health With Harriet Limited | Health & social care | 2023 |
| Hearn Brickworks Ltd | Construction | 2014 |
| Hedingham 3D Studio Ltd | Manufacturing | 2026 |
| Hedingham Education CIC | Education | 2026 |
| Hedingham School and Sixth Form | Education | 2012 |
| Heliotrope Learning Limited | Professional & scientific | 2014 |
| Helmsman Global Limited | Financial services | 2013 |
| Hetty's Hens Ltd | Manufacturing | 2015 |
| Hi-Vizibility Ltd | Manufacturing | 2016 |
| High Barn Hall Boarding Kennels Limited | Agriculture & fishing | 2013 |
| High Garrett Auto's Ltd | Wholesale & retail | 2018 |
| High News Limited | Administrative & support | 2021 |
| Hill Farm Mews Management Company Limited | Households | 2020 |
| Hinckford Farming Limited | Agriculture & fishing | 2010 |
| HIT Marketing & Design Ltd | Professional & scientific | 2014 |
| Hitherwood Consulting Limited | Professional & scientific | 2007 |
| HLW International Limited | Professional & scientific | 1992 |
| Hogarth Court RTM Company Limited | Households | 2018 |
| Holdfast Consulting Limited | Professional & scientific | 2019 |
| Holyoake Terrace Management Company Limited | Real estate | 2011 |
| Hopkins Arbitrage Limited | Wholesale & retail | 2026 |
| Horizon Logic Ltd | Information & communication | 2018 |
| Horse Drawn Funerals Ltd | Extraterritorial | 2012 |
| Houghton Associates | | 1993 |
| House Boutique Ltd | Real estate | 2026 |
| House of Mcleod Ltd | Hospitality | 2026 |
| Howe Farming Limited | Agriculture & fishing | 2018 |
| Howlett Business Services Ltd | Professional & scientific | 2019 |
| Hphq Ltd | Wholesale & retail | 2005 |
| HR Thorp Estates Limited | Real estate | 2025 |
| HSP Media Ltd | Professional & scientific | 2025 |
| HTF Logistics UK Ltd | Transport & logistics | 2004 |
| Hub Arts LAB CIC | Arts & recreation | 2011 |
| Hummingbird Home Hub C.I.C. | Education | 2024 |
| Hunter Morgan Property Ltd | Real estate | 2024 |
| Hunwicks Management Company Ltd | Real estate | 2022 |
| Hush Beauty Salon Limited | Other services | 2018 |
| Huskop Commercial Management Limited | Wholesale & retail | 2018 |
| I & S Snodgrass Ltd | Real estate | 2018 |
| I.J.C Vision Engineering Limited | Information & communication | 2010 |
| IAN Holmes Limited | Administrative & support | 2004 |
| IBC Services Limited | Transport & logistics | 2009 |
| ILO Minerals Limited | Extraterritorial | 2023 |
| ILO Properties Limited | Real estate | 2021 |
| Imarri Limited | Wholesale & retail | 2023 |
| Imminent Infinity Records Ltd | Information & communication | 2024 |
| IN the Field Audio Ltd | Arts & recreation | 2006 |
| Independent Safeguarding Service CIC | Other services | 2017 |
| Indigo Blinds and Shutters Limited | Construction | 2014 |
| Indigo Ross Design and Print Limited | Manufacturing | 1995 |
| Indigo Ross Specialist Print Ltd | Manufacturing | 2018 |
| Infil Double Glazing Limited | Construction | 1987 |
| Infinite Cabling Ltd | Information & communication | 2023 |
| Infinity Recruitment Services Ltd | Administrative & support | 2008 |
| Insight Management Consultancy Limited | Administrative & support | 2016 |
| Inspire Leisure Training Ltd | Administrative & support | 2016 |
| Instant Image (East Anglia) Ltd | Manufacturing | 2003 |
| Intelligentfieldwork Ltd | Professional & scientific | 2023 |
| International Bullion Market Association Limited | Extraterritorial | 2015 |
| International Bullion Market Company Limited | Extraterritorial | 2009 |
| International Kilobar Association Limited | Professional & scientific | 2017 |
| International Kilobar Company Limited | Extraterritorial | 2013 |