| Hayloft Climbing Ltd | Arts & recreation | 2026 |
| HBS @ Home Ltd | Financial services | 2022 |
| HD Evolution Ltd | Hospitality | 2026 |
| Heart of Norfolk Limited | Manufacturing | 2025 |
| Heathfield Cars Ltd | Wholesale & retail | 2026 |
| Heatway Limited | Construction | 2005 |
| Heitz Engineering Limited | Manufacturing | 1980 |
| Heitz Holdings Limited | Professional & scientific | 2003 |
| Helios Guard Ltd | Wholesale & retail | 2016 |
| Henderson Plastics Limited | Manufacturing | 1991 |
| Hendry & Sons,Limited | Construction | 1948 |
| Hendry Homes Limited | Construction | 2025 |
| Henley Coaching Limited | Professional & scientific | 2015 |
| Henshaw Brothers Limited | Agriculture & fishing | 2011 |
| Heritage Restore Ltd | Professional & scientific | 2005 |
| Hermetico Ltd | Extraterritorial | 2022 |
| Hewson Estate Planning Ltd | Professional & scientific | 2020 |
| Hexcyte Ltd | Manufacturing | 2024 |
| Heydon Properties Limited | Construction | 1987 |
| HGV Solutions UK East Ltd | Transport & logistics | 2017 |
| Hi-Q Consulting Limited | Administrative & support | 2007 |
| High View (Sporle) Residents' Association Limited | Households | 2012 |
| Highfields Development Management Company Limited | Real estate | 2009 |
| Hill Farm Property Limited | Construction | 1996 |
| Hinchliffe Financial Solutions Limited | Professional & scientific | 2017 |
| Hiremorecar Limited | Administrative & support | 2011 |
| Hiremorecar Rental Ltd | Administrative & support | 2014 |
| Hitag Ltd | Information & communication | 2021 |
| Hkct Ltd | Hospitality | 2024 |
| HLP Care Ltd | Health & social care | 2023 |
| HMA Properties Norfolk Limited | Real estate | 2025 |
| HMO NR19 Ltd | Hospitality | 2020 |
| Hock Advisory Ltd | Professional & scientific | 2026 |
| Hockering Motor Services Limited | Wholesale & retail | 2009 |
| Hodson Capital Ltd | Administrative & support | 2018 |
| Holdich Recruitment Ltd | Administrative & support | 2008 |
| Hollies Properties Limited | Agriculture & fishing | 2014 |
| Hollis Associates Ltd | Education | 2012 |
| Holomoonstore Ltd | Manufacturing | 2025 |
| Holsam Limited | Professional & scientific | 2011 |
| Home ED Hive Limited | Information & communication | 2026 |
| Homeworks (Dereham) Ltd | Real estate | 2014 |
| Homeworks Lettings Limited | Real estate | 2016 |
| Hook END Roofing Ltd | Construction | 2019 |
| Hope Seafood Ltd | Manufacturing | 2020 |
| Hope Springs Investments Limited | Real estate | 2015 |
| Horizon Concierge Ltd | Administrative & support | 2014 |
| Horizon Windows East Anglia Ltd | Manufacturing | 2023 |
| Horse and Hound Health Ltd | Professional & scientific | 2025 |
| Horse and House Ltd | Real estate | 2023 |
| Horton Farms Ltd | Agriculture & fishing | 2004 |
| Hotel NR19 Ltd | Real estate | 2018 |
| Household Cavalry Ltd. | Other services | 2003 |
| Housekeeping Hero Ltd | Administrative & support | 2022 |
| Hoverfly Design Ltd | Professional & scientific | 2020 |
| Howard Real Estate Management Limited | Real estate | 2023 |
| Howes of Cards Ltd | Wholesale & retail | 2025 |
| Hrbuzz Ltd | Administrative & support | 2024 |
| Hucklesby Associates Limited | Wholesale & retail | 2014 |
| Humpty Dumpty Kindergarden Limited | Education | 2011 |
| Hunt Tanks Ltd | Manufacturing | 2019 |
| Hurn Bros Ltd | Agriculture & fishing | 2012 |
| Hurt W Limited | Wholesale & retail | 2008 |
| Hyde Bricklaying and Construction Ltd | Construction | 2025 |
| Hydr Rentals Ltd | Real estate | 2019 |
| Hydratech Engineering Limited | Professional & scientific | 2010 |
| Hydratech Onsite Limited | Professional & scientific | 2017 |
| Hypersand Ltd | Professional & scientific | 2025 |
| Hypersand Studio LLP | | 2025 |
| I Care Service Norfolk Ltd | Health & social care | 2017 |
| I Need INK Ltd | Wholesale & retail | 2022 |
| I.I.S. Insurance and Financial Services (Watton) Limited | | 1987 |
| IAS (Direct Services) Ltd | Transport & logistics | 2017 |
| Icarus Engineering Ltd | Manufacturing | 2025 |
| Icarus Property Enterprises Limited | Real estate | 2023 |
| Icarus Property Holdings Ltd | Real estate | 2024 |
| Icepage Limited | Administrative & support | 2004 |
| Icumsa Limited | Professional & scientific | 2014 |
| Ideal Joinery & Kitchens Ltd | Extraterritorial | 2015 |
| Igenix Limited | Administrative & support | 2006 |
| IN2IT Limited | Information & communication | 2000 |
| Inategen Ltd | Professional & scientific | 2018 |
| Indusport Limited | Arts & recreation | 2019 |
| Inner Space Media Limited | Professional & scientific | 2001 |
| Inspired Edge Ltd | Professional & scientific | 2023 |
| Instant Finds Ltd | Wholesale & retail | 2022 |
| Insurance Premium Finance Limited | Financial services | 2008 |
| Integral Continuity Limited | Wholesale & retail | 2003 |
| Inter Business Group Ltd | Administrative & support | 2019 |
| Inter K9 Imports Ltd | Agriculture & fishing | 2020 |
| Interpride Limited | Professional & scientific | 1999 |
| Invogue Marketing Limited | Professional & scientific | 2021 |
| Isibani Consulting Ltd | Information & communication | 2017 |
| ISR Horticultural Services Ltd | Administrative & support | 2017 |
| Italian JOB Pizza Ltd | Hospitality | 2022 |
| Itsnotmyfault Events Ltd | Arts & recreation | 2023 |
| Izzirainey Limited | Manufacturing | 2014 |
| J & J Bushrod Limited | Administrative & support | 2014 |
| J & K Cleaning Services Ltd | Administrative & support | 2019 |
| J & L Brown Ltd | Construction | 2010 |