| Gt.Well Limited | Wholesale & retail | 2024 |
| GTO Genius Ltd | Education | 2024 |
| Guided Education Hub Ltd | Education | 2025 |
| GUY Morse-Brown HAT Blocks Ltd | Manufacturing | 2007 |
| Guy's Magnets Limited | Administrative & support | 2009 |
| GWC Fencing & Groundworks Ltd | Construction | 2022 |
| GWP Medical Services Ltd. | Health & social care | 2019 |
| H & J Comms Limited | Wholesale & retail | 2018 |
| H E Collin Ltd | Arts & recreation | 2018 |
| H K Motors (Wiltshire) Ltd | Wholesale & retail | 2016 |
| H-B Designs Limited | Professional & scientific | 2005 |
| H.E Wilson Ltd | Construction | 2016 |
| H.J. Johnson (Devizes) Limited | Wholesale & retail | 1973 |
| Hack Partners Limited | Information & communication | 2014 |
| Hague Holdings Ltd | Construction | 2020 |
| Hair at the Wesley’S Ltd | Other services | 2020 |
| HALFPAST2 Limited | Real estate | 2020 |
| Hampshire Lettings Limited | Real estate | 2004 |
| Hampshire Sabers Ltd | Arts & recreation | 2024 |
| Hams Transport Limited | Transport & logistics | 2006 |
| Handy Compact Tractors Ltd | Manufacturing | 2020 |
| Happy Dyes Ltd | Wholesale & retail | 2019 |
| Harik Limited | Professional & scientific | 2016 |
| Harlequin Homes Limited | Real estate | 1987 |
| Harris Croft Livery Limited | Other services | 2010 |
| Harris Security Solutions Ltd | Administrative & support | 2021 |
| Hartley Publications Limited | Arts & recreation | 1997 |
| Hartmoor Ecology Ltd | Professional & scientific | 2024 |
| Hartmoor Fashion Limited | Wholesale & retail | 2013 |
| Hauwke Ltd | Professional & scientific | 2018 |
| Hawkstreet (NO. 2) Limited | Financial services | 2014 |
| Hawkstreet (U.K.) Limited | Real estate | 2014 |
| Hayes GFS Limited | Construction | 2008 |
| HD Telematics Ltd | Wholesale & retail | 2026 |
| Headlights (Lighting) Ltd | Wholesale & retail | 2012 |
| Healing Earth Project Limited | Agriculture & fishing | 2025 |
| Healthfootprint. Limited | Extraterritorial | 2008 |
| Heatley Robinson Limited | Real estate | 2011 |
| Help Educational Psychology Services Ltd | Education | 2022 |
| Hendrickse Management & Consultancy Limited | Professional & scientific | 2019 |
| Henham Interiors Ltd | Professional & scientific | 2020 |
| Henman Close Management Limited | Households | 2002 |
| Henrich Hardware Limited | Wholesale & retail | 2003 |
| Henry Aldridge and SON Limited | Administrative & support | 2019 |
| Henry Timmis Ltd | Administrative & support | 2019 |
| Herd Instincts Limited | Professional & scientific | 2018 |
| Herdwick Ecology Ltd | Professional & scientific | 2020 |
| Heron Designs Limited | Manufacturing | 2020 |
| Hessel Holdings Ltd | Real estate | 2019 |
| HG Land Developments (Durrington) Ltd | Construction | 2024 |
| Hideaway by Design Limited | Construction | 2024 |
| Higher ED Partners Limited | Education | 2017 |
| Highgate Property & Development Ltd | Construction | 2025 |
| Hills & Associates Ltd | Information & communication | 2022 |
| Historic Times Limited | Wholesale & retail | 2015 |
| Hogs Back Books Limited | Information & communication | 2005 |
| Hogs Back Publishing Limited | Extraterritorial | 2005 |
| Holbeck Land (Malton) Limited | Construction | 2011 |
| Hollychocs Ltd | Manufacturing | 2022 |
| Holy Trinity Church of England Primary Academy | Education | 2011 |
| Homelovers Limited | Construction | 2002 |
| Hooley Homes Ltd | Administrative & support | 2011 |
| Hordeum Collis Limited | Real estate | 2016 |
| House of Amitie Limited | Wholesale & retail | 2022 |
| Hrhislop.Com (Electrical Contracting) Limited | Construction | 2014 |
| HS Models Limited | Other services | 2021 |
| HSE Health Ltd | Health & social care | 2024 |
| Hubbards Seeds Limited | Agriculture & fishing | 2012 |
| Hurdcott Landscapes Ltd | Other services | 2007 |
| HUS (UK) Limited | Real estate | 2014 |
| I & B Ayliffe Limited | Construction | 2001 |
| I-Tech Mobile Repairs Limited | Administrative & support | 2017 |
| I2L Ltd | Professional & scientific | 2002 |
| Icegrade Holdings Limited | Financial services | 2011 |
| Ideal Home Cleaners Limited | Extraterritorial | 2012 |
| Impact Media Specialists Ltd | Information & communication | 2012 |
| IMW Office Services Limited | Professional & scientific | 2001 |
| Inbox Creative Ltd | Information & communication | 2016 |
| Indypen Ltd | Administrative & support | 2016 |
| Infinian Ltd | Professional & scientific | 2015 |
| Infinity Yachting Limited | Education | 2020 |
| INNOV8 R&D Ltd | Professional & scientific | 2018 |
| Innovation Electrics Ltd | Construction | 2025 |
| Inpestation Ltd | Administrative & support | 2025 |
| Insite Design Studio Ltd | Professional & scientific | 2020 |
| Inspired to Succeed Limited | Professional & scientific | 2009 |
| Integrity Enterprises Limited | Wholesale & retail | 2012 |
| Interspace Studios Ltd | Information & communication | 2018 |
| Invisiwire Limited | Construction | 2022 |
| Ipsum Business Services Limited | Professional & scientific | 2013 |
| Isar Consulting Ltd | Professional & scientific | 2015 |
| Ishika Sangar Consulting Limited | Professional & scientific | 2025 |
| IT Full Circle Limited | Information & communication | 2012 |
| IVY House, Devizes Management Limited | Hospitality | 1982 |
| J & a Deer Management Ltd | Agriculture & fishing | 2025 |
| J H a Estates Limited | Real estate | 2023 |
| J Jones and SON Limited | Water & waste | 2007 |
| J T a Groundworks Limited | Construction | 2012 |
| J&A Buildings Ltd | Real estate | 2024 |
| J.J.R Investments and Portfolio Management Ltd | Professional & scientific | 2023 |