| Gcstaffing Ltd | Administrative & support | 2025 |
| GCT Properties (Yorkshire) Limited | Real estate | 2018 |
| GCW Limited | Information & communication | 2016 |
| GD Electrical Specialists Ltd | Construction | 2024 |
| GD Factory Ltd | Hospitality | 2021 |
| GD Joinery Ltd | Manufacturing | 2024 |
| GD Living & Properties Ltd | Real estate | 2026 |
| GD Praga Ltd | Construction | 2016 |
| GD Restaurant Limited | Hospitality | 2017 |
| Gdecho Ltd | Health & social care | 2023 |
| Gdei Property Ltd | Construction | 2021 |
| GDF Logistics Solutions Ltd | Professional & scientific | 2024 |
| GDH Care Service Ltd | Health & social care | 2024 |
| GDM Youth Support Ltd | Hospitality | 2018 |
| GDO Broadcast Limited | Information & communication | 2015 |
| GDP China Business Services Corporation Ltd | Extraterritorial | 2024 |
| GDR Couriers Limited | Transport & logistics | 2026 |
| GDS Technologies Limited | Manufacturing | 1998 |
| Gdtt Ltd | Wholesale & retail | 2025 |
| GE Healthcare Finnamore Limited | Professional & scientific | 1991 |
| GE Lighting Operations Limited | Transport & logistics | 1990 |
| GE Specialty Materials (UK) Limited Partnership | | 2002 |
| GE World Appliance Repairs Ltd | Manufacturing | 2025 |
| Geartec Services Ltd | Wholesale & retail | 2025 |
| GEB Motors Ltd | Wholesale & retail | 2026 |
| Gebai Property Services Ltd | Construction | 2023 |
| Gebrebrahan Ltd | Transport & logistics | 2026 |
| Gebulin Ltd | Hospitality | 2024 |
| GEC Construction Ltd | Construction | 2025 |
| GEC Recruitment Limited | Information & communication | 2024 |
| Gecko Accountancy Limited | Professional & scientific | 2008 |
| Gecko Digital Limited | Information & communication | 2019 |
| Geco UK Limited | Professional & scientific | 1997 |
| Gecor Electrical Services Ltd | Construction | 2024 |
| Geddes Media Ltd | Administrative & support | 2025 |
| Gedico Ltd | Real estate | 2024 |
| Gediyat Tenth Property Limited | Real estate | 1989 |
| Gedker Ltd | Professional & scientific | 2024 |
| GEE & Holmes Limited | Manufacturing | 1935 |
| GEE and DEE Limited | Health & social care | 2017 |
| GEE Group Ltd | Professional & scientific | 1981 |
| GEE Home Services Ltd | Construction | 2026 |
| GEE HR Ltd | Administrative & support | 2025 |
| Gee's Boutique Ltd | Wholesale & retail | 2024 |
| Geech Promos Limited | Arts & recreation | 2019 |
| Geedeck Limited | Financial services | 2025 |
| GEEK365 Ltd | Information & communication | 2018 |
| Geekamoak Publishing Ltd | Extraterritorial | 2021 |
| Geeks Room Community Interest Company | Information & communication | 2017 |
| Gefen Catering Ltd | Hospitality | 2025 |
| GEJ (Services) Ltd | Professional & scientific | 2011 |
| Gekko Enterprise Ltd | Real estate | 2014 |
| GEL Properties Limited | Professional & scientific | 1980 |
| Gelato Inn Ltd | Hospitality | 2024 |
| Gelato Passion LS11 Ltd | Hospitality | 2022 |
| Gelato Station Ltd | Hospitality | 2025 |
| Geldart Estates Limited | Administrative & support | 2002 |
| Gelderd Commercials Ltd | Wholesale & retail | 2020 |
| Gelu Landscaping Ltd | Administrative & support | 2025 |
| GEM (UK) Ltd | Extraterritorial | 2011 |
| GEM Business Services Ltd | Professional & scientific | 2011 |
| GEM Distribution Limited | Wholesale & retail | 1984 |
| GEM Holdings Limited | Professional & scientific | 2019 |
| GEM Marketing Technology Limited | Professional & scientific | 2020 |
| GEM Personnel Ltd | Administrative & support | 2022 |
| Gemal Properties Limited | Real estate | 2022 |
| Gematrix Ltd | Wholesale & retail | 2026 |
| Gemba Group Ltd | Information & communication | 2017 |
| Gemelli Brand Management Limited | Wholesale & retail | 2016 |
| Gemini Electrical Limited | Construction | 2011 |
| Gemini Sparkles Clean Ltd | Administrative & support | 2025 |
| Gemini Technologies Ltd | Information & communication | 2025 |
| Geminie Care Limited | Health & social care | 2025 |
| Geminiform Ltd | Information & communication | 2019 |
| Gemlife Ltd | Wholesale & retail | 2025 |
| Gemlirose Ltd | Administrative & support | 2020 |
| Gemma Care Ltd | Administrative & support | 2023 |
| Gemma Dion Extensions Academy Limited | Other services | 2025 |
| Gemmawalker Ltd | Other services | 2024 |
| Gems Group Limited | Real estate | 2016 |
| Gems Investments Limited | Real estate | 2021 |
| Gems Life Management Limited | Professional & scientific | 2004 |
| Gems Nest Ltd | Education | 2025 |
| Gems on Demand Ltd | Wholesale & retail | 2020 |
| Gemsid Limited | Administrative & support | 2021 |
| Gemstone Accountancy (Leeds) Limited | Professional & scientific | 2022 |
| Gemstone Payroll Services (Medical) Ltd | Professional & scientific | 2024 |
| GEN Enterpises Ltd | Financial services | 2025 |
| GEN Installations Limited | Construction | 2015 |
| GEN M Limited | Extraterritorial | 2021 |
| Genaas Ltd | Health & social care | 2026 |
| Genaris Limited | Health & social care | 2025 |
| Genclose Limited | Financial services | 2015 |
| Genco Investment Ltd | Real estate | 2024 |
| Gencorps Power Generation and Control Limited | Manufacturing | 2016 |
| General and Gold Surveyors Ltd | Professional & scientific | 2022 |
| General Custer Limited | | 1983 |
| General DOC Limited | Health & social care | 2011 |
| General Media & Data Ltd | Wholesale & retail | 2014 |
| General Plastering Ltd | Construction | 2025 |