| Gurnaiya Holdings Ltd | Financial services | 2023 |
| Gurowski Holdings Ltd | Real estate | 2024 |
| Gurteen Recycling Limited | Water & waste | 2012 |
| Guru Raghavendra Limited | Health & social care | 2026 |
| Gustharts Limited | Professional & scientific | 2018 |
| Gusuk Properties Ltd | Real estate | 2025 |
| GUT Health Private Ltd | Health & social care | 2023 |
| GUY Potts & Co Limited | Professional & scientific | 1948 |
| Guyzance Estate Ltd | Agriculture & fishing | 2024 |
| Guyzance Hall Estate Limited | Construction | 1996 |
| Gvmt Consultancy Ltd | Professional & scientific | 2023 |
| GVO Media Ltd. | Arts & recreation | 2016 |
| GW Accountants Limited | Professional & scientific | 2009 |
| GWA NE Ltd | Professional & scientific | 2024 |
| Gwan Properties Ltd | Real estate | 2020 |
| Gwss Limited | Construction | 2014 |
| Gwynsson CIC | Health & social care | 2023 |
| Gxpress Solutions Ltd | Transport & logistics | 2018 |
| GYB Limited | Information & communication | 2017 |
| Gygg Limited | Arts & recreation | 2018 |
| Gym 24 Sacriston Ltd | Arts & recreation | 2019 |
| Gym Guides Limited | Education | 2016 |
| Gymnewbees Ltd | Wholesale & retail | 2024 |
| GZ Global Ltd | Wholesale & retail | 2025 |
| H & a Fish and Chips Ltd | Hospitality | 2024 |
| H & H Home Services Ltd | Construction | 2025 |
| H & S Car & Commercials Limited | Wholesale & retail | 2013 |
| H & S Investment Property Ltd | Real estate | 2024 |
| H a a Homes NCL Ltd | Real estate | 2023 |
| H Building Solutions Services Limited | Construction | 2020 |
| H G M Mexborough LLP | | 2011 |
| H I Tricomm Holdings Limited | Construction | 2006 |
| H K Rentals Ltd | Real estate | 2006 |
| H Kelly Ltd | Financial services | 2025 |
| H M Chungh Limited | Administrative & support | 2020 |
| H M Holdings International Ltd | Real estate | 2020 |
| H Nominees Limited | Administrative & support | 2024 |
| H S Conveyancing Ltd | Professional & scientific | 2016 |
| H&A Smile Ltd | Health & social care | 2015 |
| H&B Car Sales Ltd | Water & waste | 2019 |
| H&B Electrical Ltd | Construction | 2017 |
| H&H Holdings NE Ltd | Financial services | 2025 |
| H&L Co. Ltd | Hospitality | 2014 |
| H&M Doner Ltd | Wholesale & retail | 2020 |
| H&M Mobiles Ltd | Other services | 2020 |
| H&St Holdings Limited | Financial services | 2018 |
| H&St Properties Limited | Other services | 2018 |
| H. LEE (S.M.D.) Limited | Manufacturing | 1993 |
| H. M. Knitwear Limited | Administrative & support | 1993 |
| H.A Locum Ltd | Health & social care | 2022 |
| H.C.Chambers & SON Limited | Extraterritorial | 1937 |
| H.E.Williams & Co.,Limited | Professional & scientific | 1920 |
| H.K.A. Lettings Ltd | Real estate | 2025 |
| H.Mallabar Limited | | 1948 |
| H.Malone and Sons Limited | Construction | 1964 |
| H2 Empire Ltd | Wholesale & retail | 2024 |
| H24 Hotel Limited | Hospitality | 2013 |
| H2CHP Limited | Manufacturing | 2022 |
| H2H (Produce) Limited | Hospitality | 2000 |
| H2SUK Ltd | Information & communication | 2025 |
| H3LLO H3LLO Ltd | Information & communication | 2025 |
| H5 Holdings Limited | Financial services | 2020 |
| H5 Properties Limited | Real estate | 2022 |
| H5 Supply Limited | Wholesale & retail | 2020 |
| Haadi Pharma Ltd | Health & social care | 2017 |
| Habeeb OLA Studios Limited | Professional & scientific | 2023 |
| Habesha Diaspora Market Ltd | Wholesale & retail | 2025 |
| Habib Foods Ltd | Real estate | 2012 |
| Hachoo's Ltd | Wholesale & retail | 2025 |
| Hackwood Glade (Hexham) Management Company Limited | Real estate | 2008 |
| Hadayah Consulting Services Limited | Professional & scientific | 2024 |
| Hadi and Zain Ltd | Real estate | 2025 |
| Hadleys Hairdressing Limited | Other services | 2015 |
| Hadon Weld Technologies Limited | | 2010 |
| Hadrian Business Centre Ltd | Real estate | 2011 |
| Hadrian Court Maintenance Fund Limited | Real estate | 2001 |
| Hadrian Education and Development Services Limited | Hospitality | 2007 |
| Hadrian Electricals Limited | Construction | 2001 |
| Hadrian Healthcare Consulting Limited | Administrative & support | 2022 |
| Hadrian Holdco Ltd | Extraterritorial | 2022 |
| Hadrian Holmes Ltd | Construction | 2025 |
| Hadrian Motor Sports Limited | Arts & recreation | 1977 |
| Hadrian Plumbing and Heating Limited | Construction | 2016 |
| Hadrian Property Group Ltd | Real estate | 2024 |
| Hadrian Property Investments Limited | Real estate | 2017 |
| Hadrian Real Estate PLC | Construction | 2020 |
| Hadrian Road MOT Centre Ltd | Wholesale & retail | 2017 |
| Hadrian Safety Consulting Limited | Professional & scientific | 2026 |
| Hadrian Shepherd Huts Ltd | Construction | 2019 |
| Hadrian Stays Ltd | Other services | 2024 |
| Hadrian Tower Management Ltd | Other services | 2022 |
| Hadrian V-Twin Tours & Rentals Limited | Administrative & support | 2013 |
| Hadrian Village Management (NO. 2) Limited | Households | 2011 |
| Hadrian Village Management Limited | Real estate | 2005 |
| Hadrian Window Systems Limited | Administrative & support | 2003 |
| Hadrians Home Improvements Ltd | Construction | 2020 |
| Hadron Services Limited | Financial services | 2004 |
| HAE HAE Ltd | Wholesale & retail | 2025 |
| Haelan Hounds Ltd | Other services | 2024 |
| Hafizdelivery Ltd | Transport & logistics | 2025 |