| GAS Technology UK Limited | Construction | 2004 |
| GAW Capital Advisors (UK) Limited | Administrative & support | 2014 |
| GB Landscaping & Construction Ltd | Administrative & support | 2025 |
| GC & C Cleaning Ltd. | Administrative & support | 2019 |
| GC & C Construction Ltd. | Construction | 2019 |
| GC & C IT Solutions Ltd. | Information & communication | 2019 |
| GC & C Ltd | Financial services | 2019 |
| Gc&C Digital Ltd | Information & communication | 2021 |
| Gelato Gusto CPK Ltd | Manufacturing | 2022 |
| General Data Protection Regulation (Gdpr) Ltd | Administrative & support | 2017 |
| GET IT Built Ltd | Construction | 2019 |
| GG Valencia Ltd | Professional & scientific | 2026 |
| Ggac Aviation Consultants Limited | Other services | 2007 |
| GH Smith Estates Ltd | Real estate | 2020 |
| Gifty Productions Limited | Arts & recreation | 2020 |
| Gkdrums Ltd | Information & communication | 2023 |
| Glawood Estates Limited | Real estate | 2021 |
| Glawood Holdings Limited | Real estate | 2020 |
| Glawood Investments Limited | Real estate | 2021 |
| Glawood Limited | Real estate | 1970 |
| Glawood Oak Limited | Real estate | 2021 |
| Global Drone Alliance Limited | Professional & scientific | 2020 |
| Global Protection Corp UK Limited | Other services | 2017 |
| Global Technology Recruitment Limited | Administrative & support | 2024 |
| Global Tooling Source Limited | Wholesale & retail | 2014 |
| Gluxfordroofing Ltd | Construction | 2025 |
| GMJ Carpenrty Ltd | Manufacturing | 2019 |
| GMS Ball Company Limited | Manufacturing | 1999 |
| Go GET Fit Acomb Ltd | Arts & recreation | 2025 |
| Go GET Fit Ltd | Arts & recreation | 2023 |
| Goddess Own Your Body Ltd | Other services | 2021 |
| Gogsi Ltd | Real estate | 2021 |
| Goje Software Ltd | Information & communication | 2022 |
| Gold Leaf Legacy Limited | Information & communication | 2024 |
| Goldcrest Contractors Limited | Construction | 1994 |
| Golds Electrical Contractors Limited | Construction | 2011 |
| Good Times Music Limited | Information & communication | 2013 |
| Goodfish Bar Limited | Hospitality | 2017 |
| Goodwood Fire Safety Limited | Professional & scientific | 2023 |
| Gorgonian Properties Ltd | Real estate | 2020 |
| Goring Travel Agency Limited | Administrative & support | 1955 |
| GPI Consultants Ltd | Professional & scientific | 2014 |
| GPR Ludi Limited | Professional & scientific | 2023 |
| Grange Park Carpets LLP | | 2009 |
| GRB Property Services Limited | Construction | 2016 |
| Grealish Properties Ltd | Real estate | 2025 |
| Green Box Consulting Limited | Professional & scientific | 2016 |
| Green Chilli Ltd | Administrative & support | 2017 |
| Green on Enterprises Ltd | Administrative & support | 2021 |
| Greenaway Investments Limited | Construction | 2006 |
| Greenfield Services (Southern) Limited | Manufacturing | 1997 |
| Greenstar Cleaners Ltd | Administrative & support | 2004 |
| Gremlin Air LLP | | 2018 |
| Grevans Limited | Real estate | 2024 |
| Grey Collective Limited | Administrative & support | 2022 |
| Greythink Services Limited | Manufacturing | 2024 |
| Group 1 Services Ltd | Administrative & support | 2025 |
| Grove Park South East LLP | | 2006 |
| GS Renewable UK Ltd | Construction | 2019 |
| GSG Freehold Investments Ltd | Real estate | 2015 |
| Gsgf Developments Ltd | Real estate | 2019 |
| GTP Holdings Limited | Professional & scientific | 2015 |
| Guestay Ltd | Real estate | 2018 |
| Gungor FC Ltd | Hospitality | 2025 |
| H G King Funeral Services Ltd | Other services | 2020 |
| H H J Trading Limited | Wholesale & retail | 2007 |
| Haalo Ltd | Professional & scientific | 2021 |
| Halewick Foxes Ltd | Real estate | 2021 |
| Hamilton Christou Productions Ltd | Financial services | 2023 |
| Hand Knotted RUG Company Ltd | Wholesale & retail | 2017 |
| Hangar 7 Management Co Ltd | Real estate | 2023 |
| Hangar 7 Pashley Ltd | Real estate | 2013 |
| Hansen Estates Ltd | Real estate | 2020 |
| Hanwells Limited | Wholesale & retail | 2005 |
| Happy Nails ATL Ltd | Other services | 2024 |
| Harding Enterprises Ltd | Professional & scientific | 2012 |
| Harmony Groundworks Limited | Construction | 2011 |
| Harrison Whites Sussex Ltd | Administrative & support | 2024 |
| Havard Technical Ltd | Administrative & support | 2024 |
| Haven Custodians Lancing Ltd | Real estate | 2025 |
| Hawksley RM Limited | Professional & scientific | 1995 |
| HBR Maintenance Limited | Construction | 2018 |
| HBS Consulting Engineers Ltd | Professional & scientific | 2021 |
| HC Brothers Ltd | Hospitality | 2024 |
| Hdrc General Partner LLP | | 2015 |
| Hdrc LP | | 2015 |
| Healthy Supplies Limited | Wholesale & retail | 2009 |
| Helg (Sussex) Ltd | Construction | 2024 |
| Helg Commercial Properties Ltd | Construction | 2018 |
| Helg Properties Ltd | Real estate | 2016 |
| Herovitsch Ltd | Wholesale & retail | 2024 |
| Hestia Property Asset Management Limited | Real estate | 2020 |
| Higher Search Limited | Administrative & support | 2019 |
| Highlander Systems Ltd | Extraterritorial | 2020 |
| Historic Military Press Limited | Information & communication | 2000 |
| HM Compliance Limited | Professional & scientific | 2025 |
| HMH International Ltd | Health & social care | 2023 |
| Hoad Property Limited | Real estate | 2023 |
| Hoffmann Beer Homes Ltd | Real estate | 2024 |
| Holding Creatives Limited | Wholesale & retail | 2010 |