| Great British Bubbly Limited | Wholesale & retail | 2023 |
| Greatbelt Limited | Professional & scientific | 2012 |
| Greek Care Limited | Administrative & support | 2014 |
| Green AGE Ltd | Professional & scientific | 2007 |
| Green Bay Property Rentals Limited | Real estate | 2015 |
| Green Consulting NZ Limited | Professional & scientific | 2022 |
| Green Dale Studio Ltd | Arts & recreation | 2022 |
| Green Grid Scaffolding Ltd | Construction | 2024 |
| Green Shop Limited | Wholesale & retail | 2014 |
| Green Shore Group Limited | Information & communication | 2021 |
| Green Soles Ltd | Wholesale & retail | 2023 |
| Green Wolf Property Ltd | Real estate | 2025 |
| Greena Management Company Limited | Professional & scientific | 2022 |
| Greenacres Services Sussex Limited | Administrative & support | 2011 |
| Greenbiro Limited | Professional & scientific | 2012 |
| Greene & Co Decorators Ltd | Construction | 2019 |
| Greener Car Sales Limited | Wholesale & retail | 2012 |
| Greenes Landscape Design Limited | Administrative & support | 2009 |
| Greenfield Demolition Nationwide Limited | Administrative & support | 2010 |
| Greenfield Farm & Stables Limited | Administrative & support | 2009 |
| Greenfield Plant Limited | Wholesale & retail | 2005 |
| Greenfield Skips Limited | Administrative & support | 2009 |
| Greenhurst LLP | | 2024 |
| Greenkote Limited | Manufacturing | 2005 |
| Greenplace Consultancy Limited | Manufacturing | 2009 |
| Greensands Europe Limited | Professional & scientific | 2007 |
| Greensands Finance Holdings Limited | Professional & scientific | 2018 |
| Greensands Finance Limited | Professional & scientific | 2018 |
| Greensands Financing PLC | Professional & scientific | 2018 |
| Greensands Investments Limited | Professional & scientific | 2007 |
| Greensands Junior Finance Limited | Professional & scientific | 2007 |
| Greensands Senior Finance Limited | Professional & scientific | 2007 |
| Greentiles Property Ltd | Hospitality | 2019 |
| Greentop Design & Build Ltd | Construction | 2023 |
| Greentop Investments | Financial services | 2012 |
| Greenwaste Ventures Ltd | Financial services | 2024 |
| Greenwell Property Holdings Ltd | Real estate | 2023 |
| Greet Limited | Information & communication | 2025 |
| Greg COX Creative Solutions Limited | Information & communication | 2018 |
| Gresham Accounts Ltd | Professional & scientific | 2003 |
| Gretchen Contracts Limited | Professional & scientific | 2011 |
| Grey Metis Limited | Information & communication | 2009 |
| Greystoke Manor Limited | Health & social care | 2019 |
| Grid Property Management Limited | Construction | 2025 |
| Grier Consultancy Limited | Professional & scientific | 2024 |
| Griffon Holdings Limited | Financial services | 2023 |
| Grineng Ltd | Professional & scientific | 2023 |
| Groceeuk Limited | Wholesale & retail | 2021 |
| Grosvenor House (Worthing) Limited | Households | 2012 |
| Group Marketing Services Limited | Professional & scientific | 2019 |
| Grovair Aviation Services Ltd | Transport & logistics | 2020 |
| Grove Legal Ltd | Professional & scientific | 2020 |
| Grover Kitchen and Bathrooms Ltd | Construction | 2025 |
| Grow Media Club Limited | Information & communication | 2024 |
| Grow Smart Coaching Limited | Information & communication | 2024 |
| GS Financial Ltd | Financial services | 2024 |
| GSE Business Consultants Ltd | Professional & scientific | 2022 |
| GSG62 Limited | Professional & scientific | 2024 |
| GSH U.K. Ltd | Administrative & support | 2014 |
| GSJ DRY Lining Ltd | Construction | 2019 |
| GT Aathiran Limited | Wholesale & retail | 2025 |
| GT Embalming Service Limited | Other services | 2012 |
| GTA Interior EOT Limited | Financial services | 2024 |
| GTA Interior Holdings One Limited | Financial services | 2019 |
| GTA Interior Limited | Construction | 2004 |
| GTR Development Limited | Information & communication | 2006 |
| Guardsman Logistics Ltd | Transport & logistics | 2021 |
| Guiel Plastering Limited | Construction | 2009 |
| Guild Care | Health & social care | 1995 |
| Guild Care (Trading) Limited | Wholesale & retail | 2013 |
| Guille Stent Management Company Limited | Households | 1989 |
| Guilty Parties Limited | Financial services | 2020 |
| Guitar Nerds Limited | Information & communication | 2016 |
| Gums 'N' Hoses Ltd | Health & social care | 2012 |
| Gunay Foods Ltd | Wholesale & retail | 2022 |
| Gunners Property Group Ltd | Real estate | 2024 |
| Guru Shivayu Ltd | Information & communication | 2021 |
| Gustavosb Ltd | Health & social care | 2016 |
| GVA Service Solutions Limited | Manufacturing | 2020 |
| GVC POP Ltd | Manufacturing | 2023 |
| GW Comms Consultancy Ltd | Professional & scientific | 2020 |
| GWK (Worthing) Limited | Professional & scientific | 2012 |
| GYL Limited | Professional & scientific | 2008 |
| Gymcats Limited | Arts & recreation | 2019 |
| Gyrongate Limited | Administrative & support | 2018 |
| H & H Legal Services Limited | Professional & scientific | 2021 |
| H and C Construction Sussex Limited | Construction | 2010 |
| H Chalfen Limited | Administrative & support | 2014 |
| H Elsden Brickwork Limited | Construction | 2015 |
| H Elsden Property Holdings Limited | Real estate | 2026 |
| H Foster & SON Ltd | Construction | 2024 |
| H N Hammer Ltd | Wholesale & retail | 2025 |
| H S Instrumentation Limited | Wholesale & retail | 2010 |
| H&P Marketing Ltd | Information & communication | 2023 |
| H&S Brickwork and Landscapes Ltd | Other services | 2017 |
| H&S Property Development Ltd | Construction | 2007 |
| H&W Broadwater Ltd | Hospitality | 2015 |
| H.Ali Consulting Limited | Administrative & support | 2015 |
| H.D. Steele & SON (Investments) Limited | Real estate | 1957 |
| H.D.Steele & SON Limited | Real estate | 1937 |