| GRW Response Limited | Extraterritorial | 2011 |
| GS Motorcycles Services Limited | Wholesale & retail | 2025 |
| Gsdx Limited | Professional & scientific | 2026 |
| GSM International Limited | Other services | 2007 |
| Gsscounselling Limited | Health & social care | 2023 |
| GST Services Ltd | Other services | 2021 |
| GT Moralis Ltd | Wholesale & retail | 2018 |
| Gtree Limited | Professional & scientific | 2023 |
| Guardian Advisors (Fire) Ltd | Administrative & support | 2020 |
| Guardian Advisors Ltd | Administrative & support | 2012 |
| Guardian Concepts Limited | Administrative & support | 2010 |
| Guergolet Ltd | Wholesale & retail | 2022 |
| Guest in Case Ltd | Hospitality | 2020 |
| Guest Wifi Ltd | Information & communication | 2013 |
| Guildford Court Freehold Limited | Real estate | 2025 |
| Guildford Spinal Health Ltd | Health & social care | 2026 |
| Guilty Events Limited | Arts & recreation | 2019 |
| GUL TAJ Enterprise Ltd | Hospitality | 2016 |
| Gulf English Consultancy & Events Ltd | Professional & scientific | 2018 |
| Gullivers Close Management Limited | Households | 2016 |
| Gulls Management Limited | Households | 2003 |
| Gulson Road Limited | Construction | 2017 |
| Gumiho Services Ltd | Professional & scientific | 2025 |
| GUN Shot Games Ltd | Manufacturing | 2025 |
| Gunasekera Samaraweera Ltd | Health & social care | 2024 |
| Gunputh Family Office Limited | Real estate | 2020 |
| Gurdmangle Property Management Company Limited (the) | Households | 1968 |
| Gutter - Repairs and Plumbing Solutions Ltd | Administrative & support | 2009 |
| GUVE68 Ltd | Hospitality | 2023 |
| Guven Express Limited | Wholesale & retail | 2008 |
| GVO Group Ltd | Households | 2025 |
| GWE Southern Ltd | Construction | 2009 |
| Gweilo Prod Limited | Arts & recreation | 2022 |
| Gwinnett Group Holdings Limited | Financial services | 2026 |
| GWP Marketing Ltd | Information & communication | 2018 |
| GX Cellar Ltd | Transport & logistics | 2021 |
| Gxgas Ltd | Wholesale & retail | 2020 |
| Gxgases Ltd | Wholesale & retail | 2020 |
| Gyco Estates Ltd | Real estate | 2024 |
| Gymstars Gymnastics Academy Ltd | Arts & recreation | 2019 |
| H & D Estates Ltd | Households | 2013 |
| H & H Motorcycles Sales and Repairs Ltd | Wholesale & retail | 2026 |
| H & S Fabrics Limited | Manufacturing | 2009 |
| H R Logistics Wessex Ltd | Transport & logistics | 2026 |
| H&B Partners Limited | Real estate | 2025 |
| H&C Management Ltd | Households | 2026 |
| H&E Beauty Room Ltd | Other services | 2024 |
| H&J Group Holdings Limited | Financial services | 2023 |
| H&J Trustees Limited | Professional & scientific | 2023 |
| H.H. White Fencing Contractors Limited | Construction | 1985 |
| H.H.D.F Hospitality Ltd | Hospitality | 2026 |
| H.J.Cole(Haulage)Limited | Transport & logistics | 1970 |
| H.P. Transport (Garages) Limited | Manufacturing | 1982 |
| H.P.D Hughes Project Delivery Limited | Administrative & support | 2016 |
| H28 Limited | Information & communication | 2012 |
| H2F Roofing Limited | Construction | 2024 |
| H3C Ltd | Professional & scientific | 2025 |
| Haarlem Richmond Management Limited | Real estate | 2020 |
| Habgood Builders Limited | Construction | 2009 |
| Habib Restaurant Ltd | Hospitality | 2015 |
| Habibi Restaurant Ltd | Hospitality | 2026 |
| Habit Creative Ltd | Manufacturing | 2014 |
| Habitat Mobile Homes Ltd | Construction | 2015 |
| Habitat Systems Ltd | Water & waste | 2025 |
| Habo Ltd | Wholesale & retail | 2026 |
| Hadden Developments Limited | Construction | 2016 |
| Haddon Wood Property Management Ltd | Real estate | 2013 |
| Hadland Care Group Limited | Construction | 2003 |
| Hadland Care Trustees Limited | Extraterritorial | 2024 |
| Hadland Employment Solutions Limited | Administrative & support | 2021 |
| Hadland Sustainable Education Group Limited | Extraterritorial | 2024 |
| Hadley Court (Southbourne) Limited | Households | 1974 |
| Haidari Taxi Ltd | Transport & logistics | 2026 |
| Haider (NE) Limited | Transport & logistics | 2005 |
| Hair Design Saloon Ltd | Other services | 2021 |
| Hair in the Gate Film Productions 2020 Limited | Arts & recreation | 2020 |
| Hairbyamaa Limited | Other services | 2025 |
| Hairdressers Supplies Limited | Wholesale & retail | 2007 |
| Hairlogyx Ltd | Wholesale & retail | 2023 |
| Haisoms Ltd | Information & communication | 2026 |
| Hakd Health Limited | Wholesale & retail | 2024 |
| HAL Construction Limited | Construction | 2025 |
| Halaby Limited | Hospitality | 2017 |
| Haldan Properties Ltd | Real estate | 2024 |
| Hale Enterprises Ltd | Wholesale & retail | 2021 |
| Halebrose Grange RTM Company Limited | Households | 2024 |
| Halebrose Ltd | Real estate | 2022 |
| Half Moon Medical Ltd | Administrative & support | 2017 |
| Half Sigma Consultancy Limited | Information & communication | 2023 |
| Halip Engineering Ltd | Professional & scientific | 2019 |
| Hallmark Kitchen Designs Limited | Wholesale & retail | 2011 |
| Halls Catering and Refrigeration Services Limited | Manufacturing | 2020 |
| Halo Bournemouth Limited | Hospitality | 2013 |
| Halo Hypnotherapy Limited | Health & social care | 2004 |
| Halo International Limited | Financial services | 2021 |
| Halterworth Estates Ltd | Real estate | 2024 |
| Halterworth Holdings Limited | Financial services | 2025 |
| Hamad Developments Ltd | Wholesale & retail | 2022 |
| Hamble Court Management Company Limited | Households | 1975 |
| Hamble Riverside Flats Limited | Households | 1998 |