| Guildford Surrey Construction Ltd | Construction | 2025 |
| Guildford Sushi Ltd | Administrative & support | 2017 |
| Guildford Therapy Ltd | Health & social care | 2020 |
| Guildford Town Centre Chaplaincy | Health & social care | 2008 |
| Guildford Traders Ltd | Hospitality | 2022 |
| Guildford Transmission Services Limited | Wholesale & retail | 2012 |
| Guildford Tyre Company Limited | Wholesale & retail | 1976 |
| Guildford Upper Limb Limited | Health & social care | 2019 |
| Guildford.Games Limited | Administrative & support | 2022 |
| Guildfordautocentre Limited | Wholesale & retail | 2026 |
| Guildfordians Association Club Limited | Arts & recreation | 2017 |
| Guildfordians Rugby Football Club Limited | Arts & recreation | 2018 |
| Guildfoss Limited | Information & communication | 2009 |
| Guildomatic Driving School Limited | Education | 2025 |
| Guildown Grange Limited | Hospitality | 2003 |
| Guildwood Properties Limited | Real estate | 2019 |
| Guilford Dentalab Ltd | Health & social care | 2025 |
| Guisepurpose Limited | Administrative & support | 1988 |
| Gumdrop Limited | Manufacturing | 2008 |
| Gundog Trainers Academy Online Ltd | Education | 2022 |
| Gurung & Family Properties Limited | Real estate | 2024 |
| Gurung RN Ltd | Health & social care | 2025 |
| GUY G Investment Limited | Real estate | 2020 |
| GUY Leaning Consultants Ltd | Professional & scientific | 2020 |
| GW M&D Ltd | Information & communication | 2019 |
| Gwithian Development Ltd | Real estate | 2022 |
| GY Telecom Limited | Information & communication | 2008 |
| Gym Fit OUT Limited | Construction | 2022 |
| Gymnastics Factory Limited | Arts & recreation | 2004 |
| GZ Barbers Ltd | Other services | 2026 |
| H & H Bespoke Interiors Limited | Construction | 2011 |
| H & H Construction (Guildford) Limited | Construction | 1994 |
| H & H Construction Holding Company Limited | Professional & scientific | 1999 |
| H D Brooks and Sons Ltd | Construction | 2017 |
| H Getaways Limited | Real estate | 2023 |
| H&M Trading Company (Overseas) Limited | Wholesale & retail | 2017 |
| H&M Trading Ltd | Wholesale & retail | 2020 |
| H&S Services European Division Limited | Wholesale & retail | 2015 |
| H.G. Rent Ltd | Transport & logistics | 1978 |
| H2 Software Limited | Information & communication | 2008 |
| H2O Aquatics Limited | Wholesale & retail | 2010 |
| Habsburg Consulting Limited | Professional & scientific | 2019 |
| Habyte Limited | Information & communication | 2016 |
| Hack Make DO Ltd | Information & communication | 2024 |
| Hacklingson Holdings Limited | Extraterritorial | 2025 |
| Hacknicom Ltd | Professional & scientific | 2023 |
| Hadleigh Pinto Limited | Construction | 2009 |
| Haemostatix Limited | Professional & scientific | 2003 |
| Hainfort Associates Ltd. | Administrative & support | 2018 |
| Hair Master Design Limited | Other services | 2018 |
| Hakim Homes Ltd | Real estate | 2024 |
| Hale Property Services Limited | Construction | 2018 |
| Half Full Group Ltd | Wholesale & retail | 2018 |
| HALF11 Ltd | Professional & scientific | 2020 |
| Hall & Partners Europe Limited | Professional & scientific | 1992 |
| Hall Kingcome Consulting Ltd | Administrative & support | 2018 |
| Hall Services Limited | Professional & scientific | 2003 |
| HALL54 Limited | Wholesale & retail | 2021 |
| Hallmark Electrical Limited | Construction | 2009 |
| Hallmarq Systems Ltd | Extraterritorial | 1997 |
| Hallmarq Veterinary Imaging Limited | Manufacturing | 2000 |
| Halo Promo Risk Limited | Financial services | 2017 |
| Halow Project | Education | 2006 |
| Halsey Meadows (Bramley) Management Company Limited | Households | 2018 |
| Hambledon (the Evergreens) Management Company Limited | Households | 1997 |
| Hambro Partners Limited | Administrative & support | 2025 |
| Hamilton Interiors Ltd | Construction | 2021 |
| Hammerhead Contractors Limited | Construction | 2017 |
| Hammerscleaning Ltd | Administrative & support | 2023 |
| Hampshire Hospitality Investments Limited | Real estate | 2021 |
| Hampton Rifle Club Ltd | Arts & recreation | 2025 |
| Hand Carwash and Detailing Ltd | Professional & scientific | 2026 |
| Hand in PAW Ltd | Information & communication | 2019 |
| Handara Property Group Ltd | Real estate | 2023 |
| Handiwork Ltd | Education | 2024 |
| Hanei Trade Ltd | Transport & logistics | 2023 |
| Hanki Trading Ltd | Hospitality | 2019 |
| Hanlye View Management Company Ltd | Households | 2023 |
| Hannah Sisk Limited | Real estate | 2011 |
| Hanover House (Guildford) Limited | Households | 1984 |
| Hants Developments Ltd | Construction | 2019 |
| Hants Homes Ltd | Real estate | 2019 |
| Hantu Consulting Limited | Administrative & support | 2000 |
| Hanwill Properties Limited | Real estate | 2012 |
| Happy 6 Limited | Information & communication | 2014 |
| Happy Healthy Hens Ltd | Wholesale & retail | 2021 |
| Happy to Meet Productions Ltd | Other services | 2019 |
| Harandi Holdings Ltd | Financial services | 2024 |
| Harandi Software Solutions Ltd | Information & communication | 2024 |
| Harbledown Consulting Ltd | Information & communication | 2021 |
| Harbour and Home Limited | Manufacturing | 2018 |
| Harbour HR Limited | Administrative & support | 2004 |
| Harbour Industrial Ltd | Construction | 2019 |
| Harbour Views (Maisonettes) Management Company Limited | Households | 2026 |
| Harbridge Engineering Limited | Construction | 1962 |
| Harbridge Holdings Limited | Construction | 2004 |
| Harding Bros Investments Ltd | Real estate | 2019 |
| Harding Financial Ltd | Financial services | 2011 |
| Harding Homes (Dorking) Limited | Hospitality | 2024 |
| Harding Professional Services Ltd | Financial services | 2018 |