| Gills Courier & Recovery Ltd | Wholesale & retail | 2022 |
| Gills MIX Concrete Pumping Ltd | Construction | 2021 |
| Gills News & Fags Limited | Wholesale & retail | 2012 |
| Gills News Limited | Wholesale & retail | 2013 |
| Gilman Financial Planning Limited | Professional & scientific | 2025 |
| Gilmor Hair + Beauty Bridgend Limited | Wholesale & retail | 2017 |
| Gilmor Hair and Beauty (Newport) Limited | Wholesale & retail | 2013 |
| Gilmor Holdings Limited | Financial services | 2023 |
| Gilondon Ltd | Wholesale & retail | 2025 |
| Gilrai Ltd | Other services | 2018 |
| Gimg Ltd | Administrative & support | 2026 |
| Gimmick Consulting Limited | Information & communication | 2011 |
| GIN and Pickles Limited | Wholesale & retail | 2017 |
| GIN Media Developments Ltd | Information & communication | 2019 |
| Gina G Beauty Limited | Other services | 2015 |
| Gina Healthcare Services Ltd | Administrative & support | 2019 |
| Ginadianarobert Ltd | Transport & logistics | 2024 |
| Ginaglad Care Limited | Health & social care | 2022 |
| Ginalearns Ltd | Wholesale & retail | 2025 |
| Gingally Auto Services Ltd | Wholesale & retail | 2011 |
| Ginger and SON Holdings Limited | Health & social care | 2018 |
| Ginger Bear Construction Limited | Real estate | 2014 |
| Ginger Cat Crafts Ltd | Wholesale & retail | 2022 |
| Ginger Energy Limited | Professional & scientific | 2009 |
| Gingerland Properties Limited | Real estate | 2017 |
| Gingermittens Ltd | Manufacturing | 2023 |
| Gini Property Ltd | Real estate | 2025 |
| Ginnei Co Ltd | Real estate | 2020 |
| Ginos Square Pizza Ltd | Hospitality | 2018 |
| Ginsberg (Homes) Ltd | Real estate | 2024 |
| Ginsberg Properties Limited | Real estate | 2016 |
| Ginseng Tang Limited | Health & social care | 2008 |
| Ginza 786 Limited | Wholesale & retail | 2019 |
| Gioielli Reali Ltd | Wholesale & retail | 2023 |
| Giom Ventures Ltd | Financial services | 2024 |
| Giomax Limited | Real estate | 2025 |
| Giorlana Services Ltd | Administrative & support | 2021 |
| Gioti Catering Ltd | Hospitality | 2023 |
| Giraffe Audio Limited | Wholesale & retail | 2013 |
| Giraffe Concepts Limited | Hospitality | 1997 |
| Gireno Logistics Ltd | Transport & logistics | 2015 |
| Girl Grind UK CIC | Education | 2020 |
| Girl in a Tree Ltd | Administrative & support | 2024 |
| Girl in the Purple Ltd | Education | 2020 |
| Girl Train Limited | Arts & recreation | 2024 |
| Girldreamer Ltd | Education | 2016 |
| Girleees Ltd | Hospitality | 2024 |
| Girling Holdings Ltd | Extraterritorial | 2023 |
| Girling Property Ltd | Extraterritorial | 2023 |
| Giro Food Limited | Hospitality | 1969 |
| Giro Property Developments Limited | Construction | 2021 |
| GIS Fire Ltd | Construction | 2021 |
| GIS Property Developments Limited | Real estate | 2022 |
| Gisrpay Ltd | Information & communication | 2009 |
| Gist Mistress Limited | Wholesale & retail | 2012 |
| Gitamy Logistics Ltd | Transport & logistics | 2023 |
| Gitar Trans Ltd | Transport & logistics | 2017 |
| Giulia Creatives Ltd | Administrative & support | 2024 |
| Giulia Drivers Ltd | Transport & logistics | 2019 |
| Givalley Ltd | Wholesale & retail | 2025 |
| Givaurra Limited | Wholesale & retail | 2023 |
| Give Way Support Care Consultancy Ltd | Professional & scientific | 2026 |
| Given's Property Services Ltd | Construction | 2025 |
| Giveway Support Ltd | Health & social care | 2026 |
| Giwa Refrigration & Aircon Ltd | Wholesale & retail | 2024 |
| Giziel Lima Ltd | Professional & scientific | 2026 |
| Gizmo Books Limited | Administrative & support | 2010 |
| Gizmo Ease Ltd | Wholesale & retail | 2024 |
| Gizmooland Ltd | Wholesale & retail | 2025 |
| Gizolan Limited | Wholesale & retail | 2020 |
| GJ Khaira Services Ltd | Transport & logistics | 2026 |
| GJ Property Services Ltd | Real estate | 2026 |
| GJ Toquero Ltd | Health & social care | 2025 |
| GJ Trans Ltd | Transport & logistics | 2013 |
| Gjasw Holdings Ltd | Financial services | 2022 |
| Gjbennett Ltd | Transport & logistics | 2026 |
| Gjeff and Co Ltd | Manufacturing | 2024 |
| Gjengineering Ltd | Professional & scientific | 2024 |
| Gjgds Consulting Services Ltd | Professional & scientific | 2026 |
| GJI Construction Ltd | Construction | 2016 |
| Gjiro Construction Limited | Real estate | 2024 |
| GJJ Associates Limited | Professional & scientific | 2004 |
| GJJ Homes Limited | Real estate | 2026 |
| Gjlm Group Holdings Ltd | Financial services | 2024 |
| Gjmg Ltd | Real estate | 2017 |
| Gjorllaku Contractors Ltd | Construction | 2019 |
| GJR Property Development Limited | Real estate | 2024 |
| GJT Contracts Ltd | Construction | 2016 |
| GJT Holdings (Midlands) Ltd | Construction | 2021 |
| GJT Wholesale Limited | Wholesale & retail | 2022 |
| Gjuta Group Ltd | Wholesale & retail | 2026 |
| GK Building and Concrete Services Ltd | Manufacturing | 2020 |
| GK Care Service Limited | Health & social care | 2010 |
| GK Chinese Limited | Hospitality | 2025 |
| GK Convenience Ltd | Wholesale & retail | 2025 |
| GK NTR Ltd | Hospitality | 2025 |
| GK RAI Construction Limited | Manufacturing | 2024 |
| GK Referrals Ltd | Education | 2025 |
| GK Seven Limited | Wholesale & retail | 2012 |
| GK Trading Ltd | Other services | 2021 |