| Heating Components & Equipment Limited | Wholesale & retail | 1984 |
| Heating Design Solutions Limited | Construction | 2020 |
| Hedgeley Motoring Services Limited | Wholesale & retail | 2005 |
| Heedstad Limited | Hospitality | 2025 |
| Heedstorm Limited | Hospitality | 2024 |
| Hegel Services Ltd | Professional & scientific | 2019 |
| Heimann Services Ltd | Administrative & support | 2022 |
| Helena Biosciences Limited | Professional & scientific | 1997 |
| Helena Laboratories (U.K.) Limited | Manufacturing | 1984 |
| Helena Properties Limited | Professional & scientific | 1998 |
| Helio Property Ltd | Real estate | 2014 |
| Hello Clean Ltd | Administrative & support | 2024 |
| Hello There Films Ltd | Information & communication | 2023 |
| Hells Circus Limited | Arts & recreation | 2022 |
| Help Recover Ltd | Health & social care | 2020 |
| Helping Hands Cat Ladies Ltd | Health & social care | 2020 |
| Helping YOU Count Ltd | Professional & scientific | 2025 |
| Helston Garages Group (Management) Limited | Professional & scientific | 1987 |
| Helston Garages Group Limited | Professional & scientific | 2000 |
| Helston Garages Limited | Wholesale & retail | 1961 |
| Henderson Roofing NE Ltd | Construction | 2025 |
| Hendon GAS Limited | Other services | 2022 |
| Henma Estates Ltd | Real estate | 2024 |
| Hennson Ltd | Extraterritorial | 2019 |
| Hennson NO 2 Ltd | Extraterritorial | 2019 |
| Henry Colbeck Limited | Wholesale & retail | 1964 |
| Henry Prince of Clowns Limited | Arts & recreation | 2021 |
| Heor Insight Ltd | Professional & scientific | 2025 |
| Heptarchy Ltd | Real estate | 2019 |
| Herc Collective Ltd | Wholesale & retail | 2023 |
| Heritage Development NE Ltd | Construction | 2013 |
| Heritage Trade Frames Limited | Manufacturing | 2006 |
| Herkalees Ltd | Arts & recreation | 2017 |
| Hermcarb Construction & Development Ltd | Construction | 2025 |
| Herrington Grange Care Home Limited | Health & social care | 2021 |
| Hersco Investments Ltd | Real estate | 2024 |
| Hevel Limited | Real estate | 2017 |
| Heworth Golf Club Limited (the) | Arts & recreation | 1975 |
| Heworth Hand Car Wash Ltd | Other services | 2025 |
| Heworth Hospitality Ltd | Hospitality | 2025 |
| Hexham Wool Warehouse Limited | Real estate | 2016 |
| HEY WOK Express Ltd | Hospitality | 2025 |
| HG Products Ltd | Manufacturing | 2024 |
| HGF Design Limited | Professional & scientific | 2014 |
| HH & PM Property Ltd | Real estate | 2023 |
| HH Developments (Hexham) Ltd | Construction | 2021 |
| HH Developments (Northumberland) Ltd | Construction | 2014 |
| HHA North East Limited | Wholesale & retail | 2016 |
| Hi-Lights Theatre Services Limited | Wholesale & retail | 2010 |
| Hidden Heights Creative Studio Ltd | Professional & scientific | 2023 |
| Hideaway Store Limited | Wholesale & retail | 2023 |
| High Fell Limited | Professional & scientific | 2018 |
| High Fell Maintenance Limited | Households | 2023 |
| High Glebe Farm Residents Association Limited | Households | 2012 |
| High Places Property Ltd | Real estate | 2026 |
| High Tea Frog Ltd | Information & communication | 2017 |
| Highbury Group Limited | Administrative & support | 2018 |
| Highbury North Limited | Real estate | 2025 |
| Highfell Service Centre Ltd | Wholesale & retail | 2025 |
| Highly Efficient Homeplan LLP | | 2013 |
| Hightail Group Limited | Professional & scientific | 2018 |
| Highway Plant Hire Ltd | Administrative & support | 2023 |
| Hiit Kitchen Limited | Hospitality | 2016 |
| Hillendale Group Limited | Extraterritorial | 2012 |
| Hillendale LR Limited | Extraterritorial | 1997 |
| Hillstar Building Management Ltd | Other services | 2010 |
| Hillstar Fire Protection Limited | Real estate | 2025 |
| Hilltop IT Solutions Ltd | Information & communication | 2022 |
| Himb Limited | Health & social care | 2022 |
| Hinchliffe Medical Services Limited | Health & social care | 2022 |
| Hindle's Auto Spares Ltd | Wholesale & retail | 2008 |
| Hindlegreenlettings Ltd | Hospitality | 2025 |
| Hindsight Accountants (NE) Ltd | Professional & scientific | 2024 |
| Hindsight Analytics Ltd | Information & communication | 2025 |
| Hinn Ltd | Manufacturing | 2021 |
| Hired Hands Waste Management Solutions Limited | Water & waste | 2021 |
| Hithrive Ltd | Professional & scientific | 2017 |
| Hj&L Limited | Wholesale & retail | 2016 |
| HK Foods NE Ltd | Wholesale & retail | 2023 |
| HKH Limited | Hospitality | 2014 |
| HL UK Real Estate Investment Ltd | Real estate | 2020 |
| Hlso Limited | Administrative & support | 2025 |
| HM Commercial Properties Limited | Real estate | 2022 |
| HMA Developments Limited | Real estate | 2021 |
| Hmcp Holdings Limited | Financial services | 2022 |
| HNL Property Limited | Real estate | 2025 |
| HNZ Medical Limited | Health & social care | 2018 |
| Hobart Investments Limited | Financial services | 2015 |
| Hock's Site Welding Ltd | Construction | 2013 |
| Hodgeys NE Ltd | Construction | 2026 |
| Hodgsons Coach Holidays Limited | Administrative & support | 2011 |
| Hodgsons Coach Operators Limited | Transport & logistics | 2002 |
| Hodgsons Group Limited | Extraterritorial | 2016 |
| Hodu Lahashem Ltd | Real estate | 2019 |
| Hoghforce Rigging and Lifting Ltd | Construction | 2026 |
| Hold My Keys Ltd | Real estate | 2025 |
| Holden Signs Limited | Manufacturing | 2021 |
| Holiday 2 LET Ltd | Hospitality | 2025 |
| Holiday Discount Centre Limited | Extraterritorial | 2011 |
| Hollinside Electrical Limited | Real estate | 2021 |