| Geco Technologies Limited | Information & communication | 2025 |
| Geeki Solutions Limited | Extraterritorial | 2014 |
| Geldautomat Ltd | Administrative & support | 2010 |
| Gelton Gjerga Gmpg Ltd | Transport & logistics | 2022 |
| GEM Garden Limited | Wholesale & retail | 2024 |
| GEM Shine Windows Ltd | Administrative & support | 2025 |
| Gemdale Ltd | Construction | 2014 |
| Gemini Compliance Solutions Limited | Professional & scientific | 2009 |
| Gemini Portfolio Limited | Administrative & support | 2009 |
| Gemz & Co Ltd | Wholesale & retail | 2024 |
| Genbros Ltd | Wholesale & retail | 2022 |
| Genco OIL Limited | Manufacturing | 2023 |
| Gender Justice and Intersectional Practice Network C.I.C. | Hospitality | 2026 |
| General Mayang Ltd | Professional & scientific | 2023 |
| Generate Leads Online Limited | Professional & scientific | 2019 |
| Genesis Sporthomes Limited | Manufacturing | 2018 |
| Genesis Ultratech Ltd | Wholesale & retail | 2024 |
| Genies Group Ltd | Wholesale & retail | 2024 |
| Genrescare Limited | Administrative & support | 2025 |
| Geoff Rivers Associates Limited | Professional & scientific | 2013 |
| Geoffrey Mayhew Farms (Holdings) Limited | Professional & scientific | 2011 |
| Geoffrey Mayhew Farms Limited | Agriculture & fishing | 2010 |
| Geomitree Limited | Manufacturing | 2022 |
| Geopro Consulting Ltd | Wholesale & retail | 2024 |
| Geoquip Water Solutions Limited | Wholesale & retail | 2002 |
| George Bailey Ltd | Real estate | 2023 |
| George Bureau Limited | Health & social care | 2011 |
| George Cook (EA) Ltd | Real estate | 2024 |
| George FOX Limited | Information & communication | 1997 |
| George Payne Construction Co.,Limited | Real estate | 1936 |
| George Predescu Ltd | Transport & logistics | 2021 |
| Georgia Leigh Intimates Limited | Wholesale & retail | 2025 |
| Georgina Kennedy Translations Limited | Professional & scientific | 2008 |
| Gerard Wood Independent Financial Planning Limited | Financial services | 2026 |
| Gerhat Transport Ltd | Transport & logistics | 2023 |
| Gerry Online Ltd | Wholesale & retail | 2025 |
| GET Buy Ltd | Other services | 2020 |
| GET on Board Consultancy Ltd | Professional & scientific | 2024 |
| GET Sola Limited | Wholesale & retail | 2026 |
| GET Way Ltd | Wholesale & retail | 2025 |
| GET Your Market Ltd | Professional & scientific | 2026 |
| Getech Limited | Wholesale & retail | 1989 |
| Getech Trustee Limited | Financial services | 2021 |
| GFD UK Development Ltd | Hospitality | 2021 |
| GFP Health Ltd | Administrative & support | 2018 |
| GHB Roofing Limited | Construction | 1990 |
| Gholdenphish Ltd | Professional & scientific | 2007 |
| Ghosts of Atlantis Ltd | Arts & recreation | 2020 |
| Ghsa Holding Ltd | Health & social care | 2026 |
| Giatri Consulting Ltd | Information & communication | 2025 |
| Gibbins U.K. Ltd | Manufacturing | 2006 |
| Gibbon Business Services Limited | Professional & scientific | 2016 |
| Gibbon Business Solutions Limited | Professional & scientific | 2024 |
| Gibbons Mechanical Services Ltd | Professional & scientific | 2019 |
| Gibbywiz Technologies Limited | Information & communication | 2012 |
| Giblii Ltd | Administrative & support | 2018 |
| Gibson Elliott Ltd. | Professional & scientific | 2005 |
| Gibson Group Solutions Ltd | Transport & logistics | 2019 |
| Gifford Close Management Company Ltd | Households | 2008 |
| Gift Support Services Limited | Health & social care | 2018 |
| Gigante Ltd | Wholesale & retail | 2025 |
| Giggles and FUN Childcare Ltd | Health & social care | 2011 |
| Gigi Impact Advisory Limited | Professional & scientific | 2024 |
| Gigi's Accessories Limited | Wholesale & retail | 2025 |
| Gigi’S Boutique Ltd | Wholesale & retail | 2021 |
| Gilbeck Glass Limited | Construction | 2013 |
| Gilby Ltd | Real estate | 2019 |
| Gilead Health Limited | Administrative & support | 2015 |
| Gill Wright (Massage & Holistic Therapies) Limited | Health & social care | 2011 |
| Gilmour and Partners Property Investments LLP | | 2025 |
| Gilson Environmental Services Ltd | Professional & scientific | 2015 |
| Gimurtex Limited | Wholesale & retail | 2024 |
| GIN Construction Ltd | Construction | 2021 |
| Ginger & Jardine Limited | Wholesale & retail | 2021 |
| Ginstata Limited | Construction | 2014 |
| Gippeswyk Carpentry & Building Limited | Construction | 2016 |
| Gippeswyk Investment Co.Limited | Construction | 1960 |
| Gipping Construction Limited | Construction | 2004 |
| Gipping Consultancy LLP | | 2025 |
| Gipping Homes Holdings Limited | Financial services | 2016 |
| Gipping Projects Limited | Construction | 2009 |
| Gipping Transport Services Limited | Transport & logistics | 2006 |
| Gipping Trustees Limited | Financial services | 2023 |
| Gipping Valley Cleaning Ltd | Administrative & support | 2026 |
| Gipping Valley Olives Limited | Agriculture & fishing | 2019 |
| Girdler Property Management Ltd | Real estate | 2026 |
| Gittens Motors Limited | Wholesale & retail | 2025 |
| Giving Back to Track Limited | Arts & recreation | 2021 |
| Gjbm Ltd | Professional & scientific | 2025 |
| GJK Enterprises Ltd | Health & social care | 2025 |
| GK Sign Services Limited | Construction | 2015 |
| Gla-Rev Products Limited | Real estate | 1952 |
| Gladwell & Plummer Construction Limited | Construction | 2021 |
| Gladwell Developments Limited | Real estate | 2024 |
| Gladwell Entertainments Ltd | Arts & recreation | 2014 |
| Gladwell Lettings Ltd | Real estate | 2017 |
| Glamo Events Ltd | Professional & scientific | 2023 |
| Glamour Beauty Salon Limited | Health & social care | 2016 |
| Glamtrade Limited | Manufacturing | 2021 |
| Glanmar Limited | Manufacturing | 2010 |