| Growing Vision Limited | Professional & scientific | 2011 |
| Grph Limited | Financial services | 2009 |
| GSB Property Maintenance Limited | Construction | 2022 |
| GSB Property Services Ltd | Real estate | 2017 |
| GSC Estates (Bradford on Avon) Limited | Real estate | 2017 |
| GSC Estates (Faringdon NO.2) Ltd | Professional & scientific | 2016 |
| Gschaa & Co Ltd | Administrative & support | 2020 |
| GT Engineering South West Ltd | Professional & scientific | 2020 |
| GT Property South West Ltd | Real estate | 2022 |
| Guardian Tools Ltd | Wholesale & retail | 2020 |
| Guinea Lane Nursery Limited | Education | 2010 |
| Gulu Gulu Studio Limited | Manufacturing | 2026 |
| Gunning Films Ltd | Information & communication | 2023 |
| Gunston Santos Ltd | Professional & scientific | 2016 |
| Gurthang Limited | Information & communication | 2024 |
| Guru Events Ltd | Hospitality | 2026 |
| Gutters & Fascias SW Ltd | Construction | 2026 |
| GUY Davies Architects Limited | Professional & scientific | 2021 |
| Guy-Delgado Consultants Ltd | Professional & scientific | 2006 |
| Gvxt Ltd | Information & communication | 2014 |
| GWB Media Ltd | Professional & scientific | 2014 |
| Gym Marine Limited | Wholesale & retail | 2014 |
| H & J Management Limited | Real estate | 2022 |
| H Build & Masonry Ltd | Construction | 2025 |
| H N C Gears & Manufacturing Limited | Manufacturing | 2007 |
| H&Hc Ltd | Information & communication | 2022 |
| H&K Global Infrastructure Advisors Ltd | Professional & scientific | 2013 |
| H&T Creative Services Ltd | Arts & recreation | 2006 |
| H.E. Goodwin Limited | Real estate | 1982 |
| H.F.P Investments Ltd | Real estate | 2015 |
| H.M Restoration Ltd | Other services | 2024 |
| H5HEALTH Ltd | Health & social care | 2017 |
| HAB Housing Limited | Construction | 2006 |
| Hacketts Hairdressing Limited | Other services | 2007 |
| Hackpen Hill Associates Limited | Professional & scientific | 2011 |
| Hacks Ltd. | Information & communication | 2020 |
| Hafifa Limited | Wholesale & retail | 2025 |
| HAI KIM Property Ltd | Real estate | 2019 |
| HAI NA Trading Limited | Wholesale & retail | 2015 |
| Haines Design Management Limited | Manufacturing | 2014 |
| Hair Enterprise Limited | Other services | 2011 |
| Half MAN Half Data Limited | Professional & scientific | 2023 |
| Half Moon Bay (Bath) Group Limited | Financial services | 2012 |
| Half Moon Bay Limited | Wholesale & retail | 1995 |
| Hall Grove Consulting Limited | Professional & scientific | 2023 |
| Hall Imaging Limited | Health & social care | 2019 |
| Hallatrow Business Park Limited | Real estate | 1995 |
| Halls Road Garage Limited | Wholesale & retail | 1998 |
| Halo Software Limited | Information & communication | 2017 |
| Halochrome Ltd | Information & communication | 2020 |
| Haltwhistle Films Ltd | Information & communication | 2012 |
| Halycon LLP | | 2016 |
| Hambury Hird Design Limited | Professional & scientific | 2005 |
| Hamburyhird Properties Ltd | Construction | 2024 |
| Hamel Ltd | Health & social care | 2014 |
| Hamilton Terrace Car Park CIC | Other services | 2020 |
| Hampshire Fire & Security Ltd | Extraterritorial | 2020 |
| Hampshire Fire Sprinkler Systems Ltd | Professional & scientific | 2017 |
| Hampton Hall Bath Limited | Households | 1965 |
| Hampton House (Estate Management) Limited | Households | 1980 |
| Hams Holdings Limited | Financial services | 2022 |
| Hana Medical Services Limited | Health & social care | 2012 |
| Hana Properties Ltd | Real estate | 2026 |
| Hands to Hold CIC | Other services | 2025 |
| Handsome Cat Ltd | Other services | 2026 |
| Handsome I.P. Ltd | Professional & scientific | 2007 |
| Handsome I.P. Services Limited | Administrative & support | 2015 |
| Handyman & Van Co Ltd | Construction | 2025 |
| Handyman and Plumbing Ltd | Construction | 2018 |
| Hanover House (Bath) Limited | Real estate | 2015 |
| Happold LLP | | 2007 |
| Happy Bridge Consulting Limited | Professional & scientific | 2024 |
| Happy River Ltd | Hospitality | 2016 |
| Happy Spines Limited | Health & social care | 2023 |
| Hapticity Architects Ltd | Professional & scientific | 2017 |
| HAR Bar Technology Limited | Professional & scientific | 2015 |
| Harambee Consulting Limited | Professional & scientific | 2018 |
| Harbea Consultancy Ltd | Professional & scientific | 2013 |
| Harbourn Breweries Ltd | Manufacturing | 2022 |
| Hardpoint Medical Ltd | Education | 2026 |
| Hardshare Limited | Professional & scientific | 1996 |
| Hardy Amies Limited | Wholesale & retail | 2022 |
| Hardy Medical Limited | Health & social care | 2013 |
| Harington Hotels Limited | Hospitality | 2004 |
| Harmac Construction Limited | Construction | 2002 |
| Harper PUB Company Ltd | Hospitality | 2025 |
| Harpyg Ltd | Wholesale & retail | 2024 |
| Harriette House Management Company Limited | Households | 2022 |
| Harris + Wilson Ltd | Information & communication | 2010 |
| Harris Greenlees Design Limited | Information & communication | 2009 |
| Harris Southwest Property Investments Limited | Real estate | 2024 |
| Harrison Industries Ltd | Manufacturing | 2017 |
| Harry Ford Investments Limited | Financial services | 2022 |
| Harry Ltd. | Information & communication | 1996 |
| Harry Simmonds Limited | Other services | 2005 |
| Hart & Birch Builders Ltd | Construction | 2012 |
| Hartigan Holdings Ltd | Professional & scientific | 2024 |
| Hartpury Consulting Limited | Health & social care | 2021 |
| Harts Natural Seafoods Limited | Wholesale & retail | 2006 |
| Harvest Solutions Limited | Information & communication | 2025 |