| Gardens, Stone and Aggregates Limited | Construction | 2019 |
| Gareth N Jones TM Ltd | Public administration | 2025 |
| Garstea Services Ltd | Transport & logistics | 2023 |
| Garsteadigi Ltd | Transport & logistics | 2025 |
| Garston Limited | Professional & scientific | 1999 |
| Garuda Global Group Ltd | Hospitality | 2019 |
| Garvels Limited | Construction | 2016 |
| Gary Ashcroft Services Limited | Transport & logistics | 2012 |
| Gary Cross Electrical (Doncaster) Limited | Construction | 2014 |
| Gary Pugh Limited | Transport & logistics | 2003 |
| Gary Robinson Ltd | Wholesale & retail | 2005 |
| Gary Timms TM Ltd | Public administration | 2023 |
| Gary Todd Ltd | Other services | 2020 |
| Garymgiles Limited | Construction | 2019 |
| Garys Plant Equipment Ltd | Administrative & support | 2025 |
| Garyspeed Performance Ltd | Wholesale & retail | 2020 |
| GAS MK One Ltd | Construction | 2021 |
| Gass Engines and Consultancy Limited | Wholesale & retail | 2024 |
| Gaswholesales Limited | Wholesale & retail | 2026 |
| Gate Pizza Limited | Hospitality | 2025 |
| Gateremotes Limited | Wholesale & retail | 2009 |
| Gates 4 U (UK) Limited | Construction | 2011 |
| Gates HUT Limited | Manufacturing | 2008 |
| Gateway Church (Doncaster) | Other services | 2010 |
| Gateway Developments (York) Limited | Construction | 2017 |
| Gateway East Office Space Ltd | Real estate | 2023 |
| Gateway Hull Ltd | Construction | 2025 |
| Gatwick Cargo Express Limited | Transport & logistics | 2020 |
| GAV Gavin Audio Visual Limited | Professional & scientific | 2018 |
| Gavin Fletcher Slurry Seal Ltd | Construction | 2023 |
| Gavin Humble TM Ltd | Public administration | 2023 |
| Gavin Lawton CBT Ltd | Health & social care | 2015 |
| Gaya Drink Limited | Wholesale & retail | 2026 |
| Gazebo Foods Limited | Manufacturing | 2025 |
| Gazette Newspaper Group Limited | Information & communication | 2018 |
| GAZZA8 Ltd | Extraterritorial | 2026 |
| Gazzarus Ltd | Information & communication | 2018 |
| GB Autos & Recovery Ltd | Wholesale & retail | 2025 |
| GB Bespoke Ltd | Wholesale & retail | 2021 |
| GB Commercial Services Ltd. | Administrative & support | 2016 |
| GB Glass Limited | Professional & scientific | 1948 |
| GB Surfacing (Contractors) Limited | Construction | 2018 |
| GB Vision UK Holding Ltd | Financial services | 2025 |
| GB Waste Limited | Extraterritorial | 2019 |
| Gbanjo Platforms Limited | Wholesale & retail | 2022 |
| GBC Estate Administration Ltd | Professional & scientific | 2015 |
| Gbenbabs Global Limited | Wholesale & retail | 2026 |
| GBI Logistics Limited | Transport & logistics | 2024 |
| GC Locums Limited | Professional & scientific | 2024 |
| GC Racing Limited | Arts & recreation | 2021 |
| Gcca Couriers Limited | Transport & logistics | 2023 |
| Gcca Limited | Transport & logistics | 2021 |
| GCL Welding Ltd | Construction | 2015 |
| GCS Doncaster Limited | Professional & scientific | 2018 |
| GCS Food Machinery Ltd | Wholesale & retail | 2026 |
| GD Cellar Ltd | Wholesale & retail | 2022 |
| GD Joinery Services Limited | Construction | 2019 |
| GD Mechanical Ltd | Professional & scientific | 2018 |
| GD Proglaze Ltd | Wholesale & retail | 2020 |
| Gd@Diy Ltd | Construction | 2019 |
| GDM Carriage Ltd | Transport & logistics | 2022 |
| GE & GE Services Ltd. | Construction | 2026 |
| GE Tech Timber Engineering Limited | Construction | 2010 |
| Gearbox UK (Doncaster) Limited | Wholesale & retail | 2018 |
| GEC Brickwork Ltd | Construction | 2026 |
| Geddes Electrical Services Limited | Construction | 2015 |
| Gedling Quarter Residents Management Company Limited | Households | 2025 |
| GEE JAY Service Station Armthorpe Limited | Wholesale & retail | 2019 |
| Gee-Mac UK Limited | Wholesale & retail | 2008 |
| Geegroom Ltd | Hospitality | 2022 |
| Geekify UK LLP | | 2026 |
| Geeln Ltd | Administrative & support | 2007 |
| Geer Properties LLP | | 2024 |
| Geewhiz Ltd | Wholesale & retail | 2025 |
| GEL Transport Limited | Manufacturing | 2014 |
| Gelm Ltd | Administrative & support | 2024 |
| Gelsor Group International Ltd | Transport & logistics | 2019 |
| GEM Stone Galaxy Ltd | Manufacturing | 2024 |
| Gemanuel Limited | Transport & logistics | 2025 |
| Gemini Education Limited | Education | 2014 |
| Gemini Inns Limited | Hospitality | 2025 |
| Gemini Inspections Limited | Professional & scientific | 2010 |
| Gemini Manpower Solutions Ltd | Administrative & support | 2024 |
| Gemini Marketing Solutions Limited | Professional & scientific | 2012 |
| Gemini Rail Ltd | Construction | 2019 |
| Gemini Safety Services Ltd | Administrative & support | 2024 |
| Gemini Seven Growth Ltd | Information & communication | 2026 |
| Geminia Ltd | Hospitality | 2023 |
| Gemski Beat Limited | Professional & scientific | 2020 |
| Gemski Investments Limited | Professional & scientific | 2020 |
| GEN2 Construction Ltd | Construction | 2019 |
| GEN2 Marketing Ltd | Wholesale & retail | 2022 |
| Genadyne Biotechnologies Limited | Wholesale & retail | 2017 |
| General Business Solutions Ltd | Professional & scientific | 2018 |
| General Catering Ltd | Wholesale & retail | 2007 |
| General Doctors Online Ltd | Financial services | 2021 |
| General Safety Services Nederland Ltd. | Public administration | 2010 |
| General Social Development CIC | Information & communication | 2022 |
| Generative Compass Technologies Ltd | Information & communication | 2025 |
| Genie Acrylics Ltd | Manufacturing | 2016 |