| Greene & Sons Limited | Real estate | 2003 |
| Greenfield Garden & Building Ltd | Construction | 2019 |
| Greenfingers Nurseries Ltd | Wholesale & retail | 1980 |
| Greenfingers Nurseries UK Ltd | Wholesale & retail | 2024 |
| Greenfort Inc Limited | Wholesale & retail | 2022 |
| Greenhoffe Limited | Real estate | 1974 |
| Greenland Holidays Ltd | Real estate | 2022 |
| Greenstant Limited | Administrative & support | 2023 |
| Greenstead Ltd | Hospitality | 2025 |
| Greenstone Environmental Limited | Administrative & support | 2009 |
| Greenway Electrical (Midlands) Limited | Construction | 2019 |
| Greenwest Developments Limited | Construction | 2015 |
| Greenwood Place (Chinnor) Management Company Limited | Households | 2022 |
| Greet Pharmacy Limited | Wholesale & retail | 2006 |
| Gregory MAY Limited | Extraterritorial | 2024 |
| Grendon Old School Court Management Limited | Households | 2007 |
| Gresley Meadow Management Company Limited | Households | 2022 |
| Greswolde Car Sales Ltd | Wholesale & retail | 2018 |
| Greswolde Lodge Investments Limited | Financial services | 2015 |
| Greswolde Properties Ltd | Real estate | 2019 |
| Greville House Limited | Households | 2006 |
| Grey Bridge House Ltd | Financial services | 2024 |
| Grey Eared Ltd | Real estate | 2019 |
| Grey Eclipse Holdings Limited | Financial services | 2018 |
| Grey Eclipse Limited | Administrative & support | 2016 |
| Grey Eclipse Support Limited | Administrative & support | 2015 |
| Grey Mill Services Limited | Information & communication | 1998 |
| Greybird SA Limited | Real estate | 2024 |
| Greybrook Development Limited | Real estate | 2021 |
| Greyfriars Catering Equipment LLP | | 2007 |
| Greyhound Heights Management Company Limited | Households | 2022 |
| Greyzebra Ltd | Professional & scientific | 2016 |
| Gridon Energy Ltd | Financial services | 2026 |
| Griffins Basketball C.I.C. | Education | 2025 |
| Griffiths Financial Consulting Limited | Professional & scientific | 2012 |
| Grigio Verde Limited | Construction | 2021 |
| Grimes Finishings Limited | Construction | 2006 |
| Grimes Holdings Limited | Construction | 2014 |
| Grip Pilates Ltd | Arts & recreation | 2025 |
| Groomeow Ltd | Other services | 2025 |
| Groot Holdings Ltd | Health & social care | 2022 |
| Ground Floor Media Ltd | Information & communication | 2026 |
| Ground Mode Ltd | Administrative & support | 2025 |
| Groundpipe Ltd | Construction | 2018 |
| Groundsell Engineering Limited | Professional & scientific | 2009 |
| Groundswell Housing Ltd | Real estate | 2026 |
| Group Thirteen Limited | Financial services | 2026 |
| GROUP66 Holdings Ltd | Financial services | 2025 |
| Grove Trustee Services Limited | Administrative & support | 2018 |
| Grovehill Industrial Estate Management Limited | Extraterritorial | 2012 |
| Grovepipe Ltd | Other services | 2014 |
| Grow Your Own Organic Learning Ltd | Education | 2017 |
| Growing Bubs Ltd | Wholesale & retail | 2018 |
| Growing Hope Worldwide Ltd | Hospitality | 2024 |
| Growth Plans Limited | Professional & scientific | 2014 |
| GRP Aspects Ltd | Extraterritorial | 2002 |
| GS (Shirley) 2 Ltd | Other services | 2024 |
| GS Finance Consulting Ltd | Professional & scientific | 2023 |
| GS Sidhu Limited | Other services | 2021 |
| GSA Camps Limited | Arts & recreation | 2024 |
| GSA Clubs Limited | Health & social care | 2021 |
| GSA Coaching Ltd | Education | 2020 |
| GSA Soft Play Ltd | Arts & recreation | 2026 |
| GSB Healthcare Limited | Health & social care | 2022 |
| GSE Aviation & Training Ltd | Transport & logistics | 2023 |
| GSM Power Services Limited | Construction | 2013 |
| GSP Limited | Health & social care | 2008 |
| Gsr-Ai Limited | Information & communication | 2025 |
| GT Broadcast Audio Services Limited | Information & communication | 2015 |
| GTB Solutions Limited | Professional & scientific | 2016 |
| GTC Parts (UK) Limited | Manufacturing | 2017 |
| GTD Ventures Limited | Health & social care | 2014 |
| GTH Construction Limited | Construction | 1991 |
| Guard&Design Ltd | Professional & scientific | 2023 |
| Guardian Legal Ltd | Financial services | 2022 |
| Guardian Smart Homes Ltd | Administrative & support | 2025 |
| Guerbet Argentina Limited | Manufacturing | 1924 |
| Guerbet Laboratories Limited | Wholesale & retail | 1994 |
| Gujjar Asset Legacy LLP | | 2026 |
| Gujjar Care Group Ltd | Health & social care | 2026 |
| GUL & Eccleston Limited | Real estate | 2021 |
| Gulf Petrol Forecourt Limited | Wholesale & retail | 2022 |
| Gulliverz Limited | Professional & scientific | 2017 |
| Gulshan Genetics Ltd | Agriculture & fishing | 2024 |
| Gunn Technical Engineering Ltd | Wholesale & retail | 2024 |
| Guntons Gate Developments Holdings Limited | Financial services | 2026 |
| Guntons Gate Developments Limited | Construction | 2022 |
| GUT2GO Ltd | Administrative & support | 2025 |
| GUY Higginbottom Consultancy Limited | Professional & scientific | 2019 |
| GVS Swimming Pool Supplies Limited | Other services | 2019 |
| GW Digital Solutions Ltd | Information & communication | 2026 |
| GW Psychology Ltd | Education | 2016 |
| Gwynle Limited | Hospitality | 2021 |
| GXM Financial Consulting Limited | Professional & scientific | 2017 |
| Gym Equipment Direct International Ltd | Arts & recreation | 2026 |
| Gym Luxe Limited | Wholesale & retail | 2017 |
| Gym Shed at the Yard Ltd | Education | 2023 |
| Gymgarmz Limited | Wholesale & retail | 2018 |
| Gymshark EU Holdings Limited | Financial services | 2024 |
| Gymshark Group Limited | Financial services | 2020 |