| Hevingham Farms Ltd | Agriculture & fishing | 2014 |
| Hewens Road Management Limited | Households | 1983 |
| Hewett Under 5S Ltd | Health & social care | 2024 |
| Hewitt-Hill Limited | Administrative & support | 1993 |
| Hexaco Limited | Real estate | 2014 |
| Hexatomic Ltd | Professional & scientific | 2014 |
| Hexthorpe Limited | Construction | 2011 |
| Hextrahunt Ltd | Information & communication | 2025 |
| Heybrook Media Limited | Professional & scientific | 2015 |
| Heydon Nominee Company 1 Limited | Financial services | 2018 |
| Heydon Nominee Company 2 Limited | Financial services | 2018 |
| Heydon Works Ltd | Information & communication | 2021 |
| Heyford Bike Service & Repair Ltd | Manufacturing | 2021 |
| Heyho Campers Ltd | Administrative & support | 2021 |
| Heylus Recruitment Ltd | Administrative & support | 2018 |
| Heyne Limited | Real estate | 2019 |
| HF Heating Ltd | Construction | 2013 |
| HFH Construction Ltd | Construction | 2022 |
| HFL Investments Ltd | Real estate | 1964 |
| HFP Holdings Limited | Real estate | 2022 |
| HFS (Property) Ltd | Real estate | 2005 |
| HFS Agri Ltd | Agriculture & fishing | 2012 |
| HFS Waste Management Limited | Water & waste | 2008 |
| Hfwd Limited | Transport & logistics | 2019 |
| HG Wells Ltd | Mining & quarrying | 1997 |
| HGE Holdings Limited | Professional & scientific | 1995 |
| HGO Consulting Ltd | Information & communication | 2026 |
| HGS Painting & Decorating Ltd | Construction | 2023 |
| HGS Plumbing & Heating Limited | Construction | 2010 |
| HH Reepham Limited | Hospitality | 2023 |
| HH Site Service Ltd | Construction | 2019 |
| HH Tankering Services Limited | Transport & logistics | 2018 |
| HHB Composites Ltd | Professional & scientific | 2023 |
| HHD Midco Limited | Financial services | 2025 |
| HHR Consultants Limited | Professional & scientific | 2016 |
| HI Thai Ltd | Hospitality | 2024 |
| Hi-Tech Renovations Limited | Wholesale & retail | 2024 |
| Hiaro Health Ltd | Health & social care | 2025 |
| Hibbett 8 Limited | Real estate | 2015 |
| Hibbett Investment Limited | Financial services | 2026 |
| Hibreeds International Limited | Agriculture & fishing | 1998 |
| Hickling Greyhound Ltd | Hospitality | 2024 |
| Hickmans Restaurant Limited | Hospitality | 2010 |
| Hickson & Brown Ltd | Manufacturing | 2023 |
| Hidden Capacities CIC | Education | 2023 |
| Hidden Escapes Norfolk Ltd | Hospitality | 2024 |
| Hidden Supplies Ltd | Wholesale & retail | 2021 |
| Hidden Talents Development Limited | Construction | 2015 |
| Hidden Talents Group Limited | Professional & scientific | 2015 |
| Hidden Talents Operations Limited | Professional & scientific | 2015 |
| Hieudang Ltd | Other services | 2024 |
| Hife Plants Ltd | Professional & scientific | 2025 |
| Higgins Human Factors Limited | Professional & scientific | 2013 |
| High Altitude Diss Ltd | Arts & recreation | 2025 |
| High Altitude Limited | Arts & recreation | 2014 |
| High Delights Ltd | Manufacturing | 2015 |
| High ELM Productions Ltd | Information & communication | 2023 |
| High FEN Limited | Agriculture & fishing | 2022 |
| High Hopes Studio Limited | Administrative & support | 2020 |
| High Horse Contracts Ltd | Professional & scientific | 2023 |
| High House Court Residents Association Limited | Households | 1976 |
| High Level Carpentry Ltd | Construction | 2026 |
| High Meadow Finance Limited | Construction | 2004 |
| High Noon Game Limited | Agriculture & fishing | 1996 |
| High Performance Circle Limited | Other services | 2023 |
| High Performance Life Limited | Information & communication | 2021 |
| High Road 1969 Limited | Extraterritorial | 2014 |
| High Sand Creek Ltd | Hospitality | 2002 |
| High Sparks Solutions Limited | Information & communication | 2015 |
| High Standards (SW) Limited | Administrative & support | 2017 |
| High Street Stalham Management Co. Limited | Administrative & support | 2008 |
| High Tech Electric Ltd | Manufacturing | 2021 |
| High Vitality Ltd | Manufacturing | 2019 |
| Highball Ltd | Arts & recreation | 2011 |
| Highcourt Developments (Anglo) Limited | Construction | 2003 |
| Highcourt Developments Limited | Construction | 1999 |
| Highcross Residential (Nominees 1) Limited | Extraterritorial | 2008 |
| Highcross Residential (Nominees 2) Ltd | Construction | 2009 |
| Highcross Shopping Centre Limited | Extraterritorial | 2014 |
| Highdecora Limited | Manufacturing | 2022 |
| Highdrive Ltd | Construction | 2024 |
| Highfield Garage (Swardeston) Limited | Real estate | 1947 |
| Highfield House CMC Ltd | Health & social care | 2018 |
| Highfield Lettings Limited | Real estate | 2022 |
| Highfield Polo Limited | Agriculture & fishing | 2015 |
| Highfield Tunnelling Company Limited | Extraterritorial | 1984 |
| Highfields Group (Norfolk) Limited | Financial services | 2023 |
| Highfields Spa Retreat Ltd | Other services | 2021 |
| Highgate (Birmingham) Limited | Hospitality | 2015 |
| Highgates Poultry Product Ltd | Wholesale & retail | 2026 |
| Highline Property Limited | Real estate | 2017 |
| Highthink Ltd | Information & communication | 2021 |
| Hightown Cambridge Ltd | Hospitality | 2025 |
| Hightown Holdings Ltd | Hospitality | 2023 |
| Hightown Investments Ltd | Real estate | 2024 |
| Highway Garden and Leisure Limited | Professional & scientific | 2005 |
| Highwest Limited | Professional & scientific | 2007 |
| Highworth UK Ltd | Information & communication | 2006 |
| Hilditch Homes Limited | Construction | 1985 |
| Hill (Highgate) Property Company Limited | Real estate | 1982 |