| Green Capital Trade Finance Partners LP | | 2024 |
| Green Cleen (Portsmouth) Limited | Administrative & support | 2018 |
| Green Deck Operations Limited | Administrative & support | 2013 |
| Green Fire Solutions Ltd | Professional & scientific | 2025 |
| Green FOX Cleaning Brighton Limited | Administrative & support | 2022 |
| Green FOX Cleaning Limited | Administrative & support | 2016 |
| Green FOX Franchising Limited | Administrative & support | 2020 |
| Green Golf Supply Ltd | Wholesale & retail | 2024 |
| Green Lane Veterinary and Farming Limited | Professional & scientific | 2014 |
| Green Talent Network Ltd | Administrative & support | 2022 |
| Greenfall Garden Revival Ltd | Administrative & support | 2025 |
| Greenland Forwarding Company UK Limited | Wholesale & retail | 2023 |
| Gregory Bros Ltd | Construction | 2016 |
| Gregory Installations Limited | Construction | 2018 |
| Gregory's Pepper Relish Limited | Hospitality | 2016 |
| Greston Associates Ltd | Professional & scientific | 2017 |
| Grey Matter Concrete Ltd. | Construction | 2013 |
| Grey Point Survey Ltd | Professional & scientific | 2022 |
| Grindle Engineering Services Limited | Manufacturing | 2010 |
| Gringlish Ltd | Professional & scientific | 2009 |
| Gripspring Ltd | Professional & scientific | 2024 |
| GRL Building Services Limited | Construction | 2006 |
| Ground Ridge Developments Ltd | Construction | 2024 |
| Ground Truth Advisory Ltd | Professional & scientific | 2026 |
| GROUND2AIR Construction Ltd | Construction | 2023 |
| Grove Surveys Limited | Construction | 2013 |
| Grow and Contribute Limited | Real estate | 2019 |
| Growcap Ltd | Professional & scientific | 2016 |
| Growth Catalyst Design Ltd | Administrative & support | 2024 |
| GRS Industrial Limited | Construction | 2020 |
| Grub and Groove Events Ltd | Administrative & support | 2025 |
| Grubb & Banks Building Services Limited | Construction | 1987 |
| Gryphon Systems Limited | Other services | 1999 |
| GS Building Plastics Ltd | Wholesale & retail | 2020 |
| GS Formalwear Ltd | Wholesale & retail | 2025 |
| GSD Clearance & Cleaning Limited | Administrative & support | 2025 |
| GSE Plastering Ltd | Construction | 2024 |
| Gstm Media and Consulting Ltd | Education | 2025 |
| GT3RS Limited | Manufacturing | 2024 |
| GTS Developments Limited | Construction | 2010 |
| GU14PD46 Limited | Real estate | 2017 |
| GU27NW66 Ltd. | Real estate | 2018 |
| GU27UH18 Limited | Real estate | 2017 |
| GU27UH6 Limited | Real estate | 2017 |
| GU27UH8 Ltd | Real estate | 2019 |
| GU27UX52 Ltd | Real estate | 2018 |
| GU28DW18 Ltd | Real estate | 2021 |
| GU28EJ15 Limited | Real estate | 2017 |
| GU28UT23 Ltd | Real estate | 2019 |
| GU29NJ45 Ltd | Real estate | 2018 |
| GU47BT Ltd | Real estate | 2017 |
| Guard Pest Control Ltd | Administrative & support | 2025 |
| Guard-Rx Limited | Information & communication | 2025 |
| Guestberry Limited | Manufacturing | 2012 |
| Guiding Families Ltd | Health & social care | 2025 |
| Guildway Building Services Ltd | Construction | 2019 |
| Gusoma Publishing Company Ltd | Information & communication | 2020 |
| Gusoma Technology Company Limited | Information & communication | 2020 |
| Guuru UK Ltd | Information & communication | 2020 |
| GVC Medical Limited | Health & social care | 2024 |
| GW Shelter Solutions Ltd | Manufacturing | 2019 |
| GWA Highway Consultants Limited | Administrative & support | 2016 |
| GWE Roofing Consultants Ltd | Construction | 2017 |
| Gym in a BAG Ltd | Wholesale & retail | 2021 |
| Gym in a Box Ltd | Wholesale & retail | 2021 |
| Gynaeconsult Limited | Health & social care | 2024 |
| Gypsum Fire Protection Ltd | Extraterritorial | 2024 |
| Gypsum Limited | Construction | 2005 |
| Gypsum Plasterers Ltd | Construction | 2016 |
| H & C Building and Landscaping Limited | Administrative & support | 2012 |
| H & C Contracts Limited | Construction | 1987 |
| H & C Property Development Limited | Construction | 2019 |
| H & H Landscapes Group Ltd | Administrative & support | 2018 |
| H C Darley and SON Limited | Transport & logistics | 2012 |
| H C S Holdings Limited | Professional & scientific | 1998 |
| H F Construction Limited | Construction | 2021 |
| H L P a Estates Ltd | Real estate | 2022 |
| H Machina Limited | Information & communication | 2025 |
| H&F Accounting Services Ltd | Professional & scientific | 2024 |
| H&H Provenance Ltd | Wholesale & retail | 2019 |
| H&S Consultancy Services Limited | Professional & scientific | 2025 |
| H&T Plumbing & Heating Limited | Energy | 2020 |
| H.P. Properties Southern Ltd | Real estate | 2026 |
| H.T Operator Services Limited | Construction | 2020 |
| H1 Capital Limited | Real estate | 2020 |
| H2 Flow Plumbing & Construction Limited | Construction | 2017 |
| HA Zone Ltd | Wholesale & retail | 2025 |
| Hackett & Dabbs LLP | | 2016 |
| Hadfield Bros Ltd | Real estate | 2018 |
| Hadland Food Group Ltd | Hospitality | 2024 |
| Hadlea Estates Ltd | Real estate | 2019 |
| Hadlea Ltd | Professional & scientific | 2018 |
| Hair at NO.1 Limited | Other services | 2019 |
| Hair by Peter Gibbs Limited | Other services | 2017 |
| Hair Raising Limited | Other services | 2009 |
| Hair Retreat & Co (Southern) Limited | Other services | 2024 |
| HAJ Homes Limited | Real estate | 2023 |
| Haktalent Ltd | Information & communication | 2023 |
| Halcyon Days Enterprises Limited | Hospitality | 2016 |
| Halcyonic Limited | Professional & scientific | 2023 |