| GEB Innovation Limited | Professional & scientific | 2016 |
| Gebo Ltd | Information & communication | 2014 |
| GEC Limited | Construction | 2025 |
| Gedo (Reigate) Limited | Wholesale & retail | 1997 |
| Geebee Concepts Limited | Health & social care | 2025 |
| Geeks and Brains Ltd | Wholesale & retail | 2020 |
| Geeky Medics Ltd | Education | 2015 |
| Geez Products Ltd | Wholesale & retail | 2017 |
| GEF Capital Ltd | Financial services | 2019 |
| Gelnet Limited | Real estate | 2001 |
| Gelvion Limited | Information & communication | 2025 |
| GEM Atlantic UK Limited | Information & communication | 2025 |
| Gemcover Investments Limited | Construction | 1984 |
| Gemi Media Ltd | Information & communication | 2022 |
| Gemini 2000 Limited | Information & communication | 1997 |
| Gemini Business Management Ltd | Professional & scientific | 2022 |
| Gemini Letting & Management Limited | Real estate | 1996 |
| Gemini Marketing Consultancy Limited | Professional & scientific | 2022 |
| Gen-Z Picks Ltd | Wholesale & retail | 2024 |
| GEN25 Limited | Information & communication | 2020 |
| Gene Keys Group Ltd | Financial services | 2023 |
| Gene Keys Ltd | Information & communication | 2020 |
| Gene Keys Publishing Ltd | Information & communication | 2016 |
| Genepi Salisbury Limited | Construction | 2015 |
| General and Finance Facilities Limited | Financial services | 1954 |
| General Council and Register of Naturopaths Limited(The) | Other services | 1963 |
| General Internet Technologies Limited | Information & communication | 2024 |
| Generate Renewables Southern Ltd | Construction | 2025 |
| Generator Digital Ltd | Information & communication | 2013 |
| Genesis 1:3 Limited | Wholesale & retail | 1993 |
| Genesis First Developments Ltd | Construction | 2025 |
| Genesis LDN Limited | Professional & scientific | 2022 |
| Genesis Marketing Solutions Ltd | Professional & scientific | 2020 |
| Genetic Algorithms Ltd | Information & communication | 2018 |
| Genevieve Ducastel DE Bailly Ltd | Manufacturing | 2025 |
| Genial Island Ltd | Information & communication | 2024 |
| Genievest Limited | Professional & scientific | 2026 |
| Genim Limited | Wholesale & retail | 2020 |
| Gentech Fabrications Ltd | Manufacturing | 2022 |
| Gentle Hands Limited | Health & social care | 2015 |
| Gentle Heart Ltd | Professional & scientific | 2020 |
| Gentleman and Rogues Barbers Ltd | Other services | 2025 |
| GEO ROI30 Group Limited | Wholesale & retail | 2025 |
| GEO Xstream Ltd | Wholesale & retail | 2024 |
| Geobell Athlete Limited | Arts & recreation | 2024 |
| Geode Advisory Limited | Professional & scientific | 2002 |
| Geoff Apartments Ltd | Real estate | 2023 |
| Geoff Kilbey Plant & Commercial Ltd | Manufacturing | 2008 |
| Geolindsey Ltd | Professional & scientific | 2026 |
| Geoprism Limited | Administrative & support | 1996 |
| George Horne Limited | Financial services | 1957 |
| George Parker Ltd | Professional & scientific | 2016 |
| George Vyner Global Ltd | Wholesale & retail | 2026 |
| Georgi Social Care Ltd | Public administration | 2025 |
| Georgia Richardson Ltd | Wholesale & retail | 2024 |
| Geosec Facilities Management Limited | Administrative & support | 2025 |
| Geostrong UK Limited | Construction | 2019 |
| Gerart Limited | Information & communication | 2025 |
| Germann Keeling Limited | Professional & scientific | 2009 |
| GET Lost Powerboat Training Limited | Education | 2018 |
| GET Lost Sailing Limited | Arts & recreation | 2015 |
| GET SAT Promotions Limited | Arts & recreation | 2017 |
| Get-Designs.Uk Limited | Manufacturing | 2015 |
| Getfluffeddoggroomers Ltd | Other services | 2025 |
| Gethouse Design Ltd | Wholesale & retail | 2025 |
| Gethouse Plan Limited | Wholesale & retail | 2025 |
| Gezpoint Ltd | Wholesale & retail | 2025 |
| GF Alarms Limited | Extraterritorial | 2006 |
| GF Cyber Limited | Administrative & support | 2019 |
| GF Electrical Limited | Construction | 2004 |
| GFE Management Ltd | Other services | 2013 |
| GFK Consultant Service Limited | Professional & scientific | 2020 |
| GFT Frames Limited | Construction | 2004 |
| GG-092-220 Limited | Real estate | 2022 |
| Ggnine BR Limited | Wholesale & retail | 2025 |
| GGT Marine & Domestic Services Limited | Manufacturing | 2024 |
| GH Canfields LLP | | 2010 |
| GH Electrical Contracting Limited | Construction | 2019 |
| GH Sales Finance Ltd | Wholesale & retail | 2025 |
| Ghadeer Almusalami Limited | Wholesale & retail | 2026 |
| Ghhv Limited | Financial services | 2022 |
| Ghica Media Ltd | Information & communication | 2024 |
| GHK (Portsmouth) Limited | Wholesale & retail | 2026 |
| Ghuraba Group Ltd | Information & communication | 2025 |
| GI and Liver Specialists Limited | Health & social care | 2017 |
| GIA International Limited | Wholesale & retail | 1982 |
| Gibbo Holdings Ltd | Financial services | 2025 |
| Gibbon Properties Limited | Construction | 2017 |
| Gibbons Financial Solutions Limited | Financial services | 2018 |
| Gibson and Sons Building and Groundworks Ltd | Construction | 2022 |
| Gibson and Sons Developments Ltd | Construction | 2024 |
| Gibson Building Services Limited | Construction | 2010 |
| Gift Force Limited | Wholesale & retail | 2003 |
| Gifted Moments Ltd | Wholesale & retail | 2011 |
| Gifts by Design Ltd | Wholesale & retail | 2022 |
| GIG Fibre Ltd | Information & communication | 2024 |
| GIG Solutions Ltd | Administrative & support | 2018 |
| Giggleprint Limited | Manufacturing | 2024 |
| Gigmad Ltd | Information & communication | 2025 |
| Gigr Instant Work Ltd | Administrative & support | 2019 |