| H&M Catering Ltd | Hospitality | 2020 |
| H&N Souq Ltd | Wholesale & retail | 2025 |
| H&S Logistics Ltd | Transport & logistics | 2018 |
| H'S Driver Trainer Ltd | Other services | 2016 |
| H. Jays Properties (Norfolk) Limited | Real estate | 2025 |
| H. Noble & SON Ltd | Energy | 2010 |
| H. R. Whiting Ltd | Manufacturing | 2023 |
| H. Smith & Sons (Honingham) Limited | Construction | 1963 |
| H.B.S. Aesthetics Ltd | Wholesale & retail | 2020 |
| H.B.S. Farms (1995) Limited | Agriculture & fishing | 1995 |
| H.Bullen & SON Limited | Professional & scientific | 1925 |
| H.C. Greengrass & Sons Limited | Professional & scientific | 1931 |
| H.C. Wilcox Fabrications Ltd. | Manufacturing | 1997 |
| H.E. Alston (Bradfield) Limited | Agriculture & fishing | 1982 |
| H.G. Blake (Holdings) Limited | Professional & scientific | 2009 |
| H.G. Blake Ltd | Extraterritorial | 2017 |
| H.Gould Cleaning Limited | Administrative & support | 2018 |
| H.J. Contracts General Woodworkers Limited | Manufacturing | 1973 |
| H2 Roofing & Building Ltd | Construction | 2025 |
| H20S Limited | Hospitality | 2006 |
| H2B Windows Ltd | Administrative & support | 2018 |
| H2BTL Ltd | Households | 2022 |
| H2O Kayaks Ltd | Wholesale & retail | 2007 |
| HA Consulting Engineers Ltd | Construction | 2015 |
| Haaise Ltd | Wholesale & retail | 2020 |
| Haas 2007 Limited | Wholesale & retail | 2007 |
| Haas Automation Limited | Wholesale & retail | 1980 |
| Haas UK Limited | Extraterritorial | 1992 |
| Habbio Home Limited | Manufacturing | 2025 |
| Habi Lettings Limited | Real estate | 2022 |
| Habib Ahmad Ltd | Wholesale & retail | 2025 |
| Habify Residential Limited | Construction | 2022 |
| Habitats Edge Ltd | Professional & scientific | 2018 |
| Hachty Ltd | Wholesale & retail | 2026 |
| Hacienda Consultants Limited | Health & social care | 2003 |
| Hackett (Builders) Limited | Real estate | 1947 |
| Hackettfilms Ltd | Information & communication | 2025 |
| Hackford Farms Limited | Agriculture & fishing | 1970 |
| Hacon Investments Limited | Real estate | 2020 |
| Hacthet Harrys Property Derby Limited | Financial services | 2025 |
| Haddenham Auctions Ltd | Wholesale & retail | 2011 |
| Haddiscoe Manor Farm Limited | Agriculture & fishing | 1955 |
| Haddon Comms Consulting Limited | Information & communication | 2016 |
| Haddon Rental Limited | Real estate | 2019 |
| Hadi Store Ltd | Wholesale & retail | 2025 |
| Hadleigh Tyre Services Limited | Wholesale & retail | 1953 |
| Hadley & Ottaway Limited | Transport & logistics | 1964 |
| Hado DR Ye's TCM Clinic Ltd. | Education | 2016 |
| Haelo Bioscience Limited | Wholesale & retail | 2026 |
| Hafez Transport Ltd | Transport & logistics | 2023 |
| Hagan Household Goods Ltd | Wholesale & retail | 2023 |
| Hague Developments Limited | Construction | 2007 |
| Hahn Haus Ltd | Real estate | 2022 |
| Haider (Norwich) Ltd | Hospitality | 2017 |
| Haider's Food Store Ltd | Wholesale & retail | 2018 |
| Haiku Services Limited | Professional & scientific | 2021 |
| Haines Marine Construction LLP | | 2012 |
| Haines Marine Limited | Manufacturing | 1999 |
| Hainstone Group Ltd | Professional & scientific | 2019 |
| Hair and Beauty Matters Ltd | Other services | 2017 |
| Hair and There Ltd | Administrative & support | 2019 |
| Hair at Face & Brow Limited | Other services | 2025 |
| Hair by Becky Read Ltd | Administrative & support | 2016 |
| HAIR20 by Jade Lauren Ltd | Other services | 2010 |
| Hairbook Limited | Other services | 2015 |
| Hairdressers Norfolk Street Ltd | Other services | 2026 |
| Hairy Frog Productions Limited | Information & communication | 2001 |
| Haizel Estates Ltd | Real estate | 2024 |
| Haizel Homes Ltd | Real estate | 2024 |
| Haizel Properties Ltd | Real estate | 2024 |
| Haizel Residential Ltd | Real estate | 2024 |
| Haizel Scientific Innovations Limited | Financial services | 2024 |
| Halal Candy Corner Ltd | Wholesale & retail | 2019 |
| Halcombe Court Management Company Limited | Households | 1998 |
| Halcyon 5 Limited | Real estate | 2026 |
| Halcyon Aesthetics Ltd | Health & social care | 2020 |
| Halder Ltd | Real estate | 2018 |
| Halekorero Limited | Professional & scientific | 2024 |
| Hales (Yarmouth) Limited | Transport & logistics | 1984 |
| Hales Convenience Store Ltd | Wholesale & retail | 2025 |
| Hales Development Land Limited | Construction | 2022 |
| Hales Development Land Two Limited | Construction | 2024 |
| Halesource Limited | Real estate | 1987 |
| Half Moon Ltd | Hospitality | 2015 |
| Halfeti Ltd | Wholesale & retail | 2025 |
| Halfway Cottage Limited | Professional & scientific | 2023 |
| Halifax Fitness Ltd | Arts & recreation | 2014 |
| Halil-Trans Ltd | Transport & logistics | 2020 |
| Halina Fashion Ltd | Wholesale & retail | 2013 |
| Hall Barn Consultants Limited | Professional & scientific | 2003 |
| Hall Farm (Suffield) Limited | Agriculture & fishing | 1964 |
| Hall Farm Nursery School Limited | Education | 2009 |
| Hall Farm Yard Ltd | Real estate | 2013 |
| Hall Lane Botesdale Management Company Limited | Households | 2020 |
| Hall Lane Developments Limited | Construction | 2026 |
| Hall Management Service Ltd | Manufacturing | 2009 |
| Hall View Property Developments Limited | Real estate | 2013 |
| Halley Homes Ltd | Real estate | 2025 |
| Halleywell Limited | Financial services | 2021 |
| Hallmark Function Management Limited | Real estate | 2005 |