| H.J. Haggas & SON Ltd | Agriculture & fishing | 1955 |
| H.S. Booker Farriery Ltd | Other services | 2022 |
| HA! Resin Socials Limited | Manufacturing | 2026 |
| Habitat Lettings Ltd | Real estate | 2015 |
| Habitat Renovation (Norfolk) Limited | Construction | 2021 |
| Hadjimichail Limited | Real estate | 1995 |
| Hadleigh Breakdown Limited | Financial services | 2015 |
| Hadleigh Claims Management Limited | Financial services | 2009 |
| Hadleigh Commercial Properties Ltd | Real estate | 2024 |
| Hagen's Hair and Beauty Ltd | Other services | 2026 |
| Hails Pitch and Groundcare Limited | Administrative & support | 2024 |
| Hair of the Dog Groomers (Kings Lynn) Ltd | Other services | 2026 |
| Hale Architecture (Trustees) Limited | Other services | 2022 |
| Hale Architecture Limited | Professional & scientific | 2013 |
| Hall Farm Barns (Pockethorpe) Management Limited | Households | 2020 |
| Hall Heating & Plumbing Services Ltd | Construction | 2016 |
| Hallmark Engineering Limited | Professional & scientific | 2013 |
| Halls Newsagents Limited | Wholesale & retail | 2002 |
| Hambleton House Investments Limited | Real estate | 2009 |
| Hamilton Blake Consultants LLP | | 2019 |
| Hamilton Medical. PA Limited | Health & social care | 2017 |
| Hampton Court (KL) Limited | Households | 2022 |
| Hamster Mail Limited | Wholesale & retail | 2020 |
| Hand ME UP Limited | Wholesale & retail | 2024 |
| Hansatech Instruments Limited | Professional & scientific | 1989 |
| Happy Bunny Club Limited | Wholesale & retail | 2017 |
| Happy Clamping Ltd | Hospitality | 2023 |
| Happy Paws Dog Walking & Pet Care Ltd | Extraterritorial | 2022 |
| Happyshadows Ltd | Hospitality | 2026 |
| Harc Holdings Limited | Financial services | 2015 |
| Harding Asset Management Limited | Financial services | 2022 |
| Hardmetal Tool Solutions Limited | Wholesale & retail | 2013 |
| Hardwick Land Developments Limited | Construction | 2022 |
| Harkness Roses 1879 Limited | Wholesale & retail | 2021 |
| Harlequin House (Hunstanton) Management Company Limited | Households | 1986 |
| Harlew Events Ltd | Arts & recreation | 2024 |
| Harley Pacific Group (18) Ltd | Arts & recreation | 2004 |
| Harley Pacific Group Ltd | Wholesale & retail | 2022 |
| Harley ST Psychotherapy Limited | Health & social care | 2018 |
| Harper Hair and Co Norfolk Limited | Other services | 2023 |
| Harris Road Contractors & Groundworks Ltd | Professional & scientific | 2016 |
| Harry Services Limited | Transport & logistics | 2017 |
| Harvest House (King's Lynn) Management Company Limited | Households | 2017 |
| Harvey Crane & Plant Limited | Construction | 2001 |
| Hatted Ltd | Professional & scientific | 2009 |
| Hawesdevelopments Ltd | Real estate | 2026 |
| Hawk Reservoir Solutions Limited | Mining & quarrying | 2005 |
| Hawkins Ryan LLP | | 2022 |
| Hawns Ltd | Health & social care | 2021 |
| Hawthorn Software Solutions Limited | Information & communication | 2003 |
| Hay's Wood Retreat Limited | Real estate | 2021 |
| Haycock & SON Joinery Ltd | Construction | 2023 |
| Hayley Steeles Financial Planning Limited | Professional & scientific | 2025 |
| Haynes Eaton Signs Limited | Manufacturing | 2003 |
| Hayward Revive Ltd | Wholesale & retail | 2011 |
| Hazuma’S Mazza Ltd | Hospitality | 2025 |
| Hbci Limited | Construction | 2015 |
| Heacham Club Limited | Other services | 1999 |
| Heacham Club Management Limited | Other services | 2023 |
| Heacham Fish Bar Ltd | Hospitality | 2025 |
| Heacham Park Limited | Agriculture & fishing | 1994 |
| Heacham Youth & Community Trust Limited | Administrative & support | 2005 |
| Headlongrush Limited | Arts & recreation | 1998 |
| Headway Support Services Ltd | Health & social care | 2021 |
| Health and Fitness Online Ltd | Wholesale & retail | 2017 |
| Health West Norfolk Limited | Health & social care | 2021 |
| Healthypooch Ltd | Manufacturing | 2025 |
| Heart of Fluff Limited | Manufacturing | 2018 |
| Heath Farmhouse Limited | Agriculture & fishing | 2020 |
| Heather & Bear Gift and Interior LLP | | 2022 |
| Heathlands Farm Ltd | Agriculture & fishing | 2020 |
| Heatom Ltd | Construction | 2014 |
| HEB (Norfolk) Limited | Real estate | 2014 |
| Hebe Properties Limited | Financial services | 2024 |
| Heidi's Hair and Beauty Limited | Other services | 2012 |
| Helping Businesses for YOU Ltd | Professional & scientific | 2023 |
| Helping YOU OUT Ltd | Wholesale & retail | 2013 |
| Helpsome Limited | Information & communication | 2025 |
| Henderson Place Management (West Bergholt) Limited | Administrative & support | 2017 |
| Henniu Construction Ltd | Construction | 2015 |
| Hepworth Holdings (East Anglia) Ltd | Real estate | 1997 |
| Hera Capital Ltd | Professional & scientific | 2025 |
| Herbert Projects Ltd | Professional & scientific | 2018 |
| Hereward Court Residents Management Company Limited | Households | 2019 |
| Hereward the Wake Ltd | Education | 2021 |
| Heritage Golf Travel Ltd | Administrative & support | 2025 |
| Heritage Tree Specialists Limited | Agriculture & fishing | 2013 |
| Heritage Window Restoration Ltd | Construction | 2023 |
| Heros Gym Limited | Arts & recreation | 2012 |
| Herskind Limited | Professional & scientific | 2007 |
| HEXAGON6 Ltd | Professional & scientific | 2019 |
| HFB Private Management Co Limited | Households | 2022 |
| HH Flowers Limited | Wholesale & retail | 2024 |
| Hi-Load Limited | Agriculture & fishing | 2012 |
| Hiband Limited | Extraterritorial | 2012 |
| Hicks Coldstores & Building Maintenance Ltd | Construction | 2010 |
| Hicks Enterprises Ltd | Hospitality | 2023 |
| Hicks Estates Limited | Real estate | 2018 |
| Hidden Village Vintage Ltd | Wholesale & retail | 2025 |
| High Definition Leadership Training Limited | Other services | 2025 |