| Huskies Sports Wear Limited | Wholesale & retail | 2022 |
| Huskii Studio Limited | Professional & scientific | 2018 |
| Hussar Gruppa Ltd | Wholesale & retail | 2014 |
| Hussey Group Investments Limited | Professional & scientific | 2010 |
| Hussey Knights Limited | Manufacturing | 1958 |
| Hussin PPC Ltd | Information & communication | 2019 |
| Husssh Distribution UK Ltd | Wholesale & retail | 2021 |
| Husssh Ltd | Wholesale & retail | 2016 |
| Hustle Crew Ltd | Education | 2016 |
| Hustle Norwich Limited | Arts & recreation | 2019 |
| Hutber Limited | Information & communication | 2012 |
| Hutch Couriers Ltd | Transport & logistics | 2026 |
| Hutech Group Ltd | Financial services | 2021 |
| Hutech Limited | Real estate | 2017 |
| Huth Property Limited | Construction | 2020 |
| Hutton Legacy Group Ltd | Real estate | 2025 |
| Huumans Tech Ltd | Professional & scientific | 2017 |
| Huunuu Ltd | Information & communication | 2014 |
| HV Creative Limited | Professional & scientific | 2024 |
| HV Energy Solutions Ltd | Manufacturing | 2018 |
| HV Financial Services Ltd | Financial services | 2022 |
| HW Advisory Services Limited | Financial services | 2020 |
| HWB Ventures Limited | Extraterritorial | 2010 |
| Hwga Partners Ltd | Hospitality | 2013 |
| Hwsil Finance Co Limited | Financial services | 2016 |
| HWW Distributions Ltd | Wholesale & retail | 2026 |
| Hy-Tech Industrial Coatings Limited | Construction | 1998 |
| Hy-Tek Group Ltd | Financial services | 2024 |
| Hyam Flooring Limited | Wholesale & retail | 2017 |
| Hybrid Designs Ltd | Information & communication | 2021 |
| Hybrid Sociological Inquiry Centre Ltd | Professional & scientific | 2025 |
| Hyde Definition Limited | Manufacturing | 2010 |
| Hyde Furniture Limited | Wholesale & retail | 2010 |
| Hyden House Limited | Wholesale & retail | 1990 |
| Hydes Property Ltd | Households | 2025 |
| Hydra Communications Limited | Information & communication | 2011 |
| Hydra Fulfilment Limited | Transport & logistics | 2025 |
| Hydro Energy Trading Limited | Energy | 2014 |
| Hydro West Midlands Limited | Wholesale & retail | 2014 |
| Hydrocarbon Commissioning & Operations Consultancy Limited | Professional & scientific | 2022 |
| Hydrogen East Limited | Administrative & support | 2020 |
| Hydrographic Consulting Ltd | Professional & scientific | 2024 |
| Hydrosys Ltd | Wholesale & retail | 2018 |
| Hyghmay Limited | Real estate | 2001 |
| Hygiene by Francesca Ltd | Health & social care | 2023 |
| Hygienius EOT Limited | Administrative & support | 2023 |
| Hygienox Limited | Extraterritorial | 1997 |
| HYJ Services Ltd | Manufacturing | 2017 |
| Hyla Properties Ltd | Extraterritorial | 2018 |
| Hylton Gott Limited | Wholesale & retail | 2002 |
| Hymns Ancient and Modern Limited | Health & social care | 1975 |
| Hypay Ltd | Administrative & support | 2025 |
| Hyper Activities Inflatables Limited | Information & communication | 2021 |
| Hyper Centre Ltd | Arts & recreation | 2021 |
| Hyper Pixel Limited | Information & communication | 2014 |
| Hyperextention Ltd | Construction | 2016 |
| Hypericum UK Ltd | Professional & scientific | 2015 |
| Hyperion Security Specialists Ltd | Administrative & support | 2025 |
| Hyperion Solar Trustee Limited | Financial services | 2023 |
| Hyperlight Digital Ltd | Professional & scientific | 2023 |
| Hyperliminal Limited | Information & communication | 2024 |
| Hyperstep Academy Ltd | Education | 2025 |
| Hyperstep Holdings Ltd | Financial services | 2025 |
| Hyrych Transport Solutions Ltd | Transport & logistics | 2025 |
| Hyspek Property Maintenance Ltd | Construction | 2017 |
| Hytchworks Limited | Professional & scientific | 2023 |
| HZ Arcade Arena Ltd | Arts & recreation | 2021 |
| I & E Capital Limited | Financial services | 2026 |
| I & K H Builders Ltd | Construction | 2017 |
| I & M Harwood (Lincs) Limited | Real estate | 2006 |
| I a & B E Murdoch Holdings Ltd | Financial services | 2019 |
| I Admin IT Limited | Administrative & support | 2022 |
| I Boxit Limited | Manufacturing | 2016 |
| I Cannot BE Limited | Arts & recreation | 2024 |
| I J Cooper Consulting Limited | Professional & scientific | 2013 |
| I J Cooper Financing Ltd | Professional & scientific | 2020 |
| I Living Ltd | Real estate | 2020 |
| I Mcnamara Ltd | Health & social care | 2017 |
| I P Security Systems Limited | Administrative & support | 2007 |
| I SJ Property Ltd | Real estate | 2024 |
| I SPY With My Little EYE Ltd | Professional & scientific | 2025 |
| I T Distribution UK Ltd | Transport & logistics | 2009 |
| I T Media (Norwich) Limited | Administrative & support | 1998 |
| I&M Fixing Ltd | Construction | 2016 |
| I-Consultants-Uk Limited | Information & communication | 2013 |
| I-Tech Enterprise Limited | Wholesale & retail | 2018 |
| I. C. Buying Associates (Norfolk) Limited | Professional & scientific | 2013 |
| I.B.C. Transport Containers Limited | Extraterritorial | 1966 |
| I.E Homes & Property Limited | Construction | 2005 |
| I.Knight Associates Limited | Professional & scientific | 2004 |
| I.S Group Services (Norwich) Limited | Administrative & support | 2019 |
| I.S. Water Treatment Limited | Water & waste | 2023 |
| I2I Holdings East Anglia Limited | Other services | 2023 |
| I2I Hospitality Limited | Hospitality | 2019 |
| I4 Property Services Limited | Construction | 2018 |
| I4ME Limited | Financial services | 2015 |
| IA Movers Ltd | Transport & logistics | 2026 |
| IAB Dental Limited | Health & social care | 2023 |
| Iain Andrews (Consultancy) Limited | Information & communication | 1993 |
| IAN and SAM Muldoon Limited | Hospitality | 2019 |