| Goma Investments Ltd | Real estate | 2012 |
| Gomboc Ltd | Wholesale & retail | 2024 |
| Gomivel Properties Ltd | Real estate | 2022 |
| Goodman Associates Limited | Professional & scientific | 1998 |
| Gopish Optical Limited | Professional & scientific | 2015 |
| Gordon and Sons Building Services Limited | Construction | 2019 |
| Gordon Bell Art Limited | Arts & recreation | 2025 |
| Gordon-Hay and Fettiplace Limited | Real estate | 2020 |
| Gorilla Gardeners Ltd | Administrative & support | 2023 |
| Gorilla Marketing and Events Ltd | Extraterritorial | 2023 |
| GORILLA3PL Ltd | Administrative & support | 2008 |
| Goring Masooms Limited | Hospitality | 2012 |
| GOS Medics Limited | Administrative & support | 2010 |
| Gosia Chalas Limited | Professional & scientific | 2017 |
| Goulding & Bird Limited | Wholesale & retail | 1962 |
| Govinda's Limited | Hospitality | 2003 |
| Gowri Tours & Travel Ltd | Transport & logistics | 2025 |
| Gozch Business Solutions Ltd | Professional & scientific | 2017 |
| GP Logixics Limited | Transport & logistics | 2021 |
| Gpal Solution Ltd | Transport & logistics | 2020 |
| GPT Homes Ltd | Construction | 2005 |
| Gpwise Limited | Health & social care | 2012 |
| Grace Light Catering Ltd | Hospitality | 2026 |
| Gracee Jewellery Limited | Wholesale & retail | 2014 |
| Grafton Bedford Limited | Real estate | 2025 |
| Graham Busch LLP | | 2017 |
| Graham Lodge Limited | Households | 1986 |
| Grains DE Cafe Ltd | Hospitality | 2024 |
| Grand Choice Autos Ltd | Wholesale & retail | 2024 |
| Grand Union Electrical Limited | Construction | 2024 |
| Grandwalk Limited | Hospitality | 1999 |
| Grange Park Preparatory School Limited | Education | 2018 |
| Granite Strategic Advisors Ltd | Professional & scientific | 2024 |
| Grantgate Properties Investments (Phase 2) Limited | Real estate | 2006 |
| Grantgate Properties Investments Ltd | Real estate | 2005 |
| Grape Technologies Ltd | Information & communication | 2024 |
| Graphic House RTM Company Ltd | Households | 2018 |
| Grasmere Electrical Limited | Construction | 2019 |
| Gravixa Structural Solutions Ltd | Professional & scientific | 2025 |
| Gray & Matther Property Limited | Real estate | 2017 |
| Green Court Edgware Limited | Administrative & support | 2011 |
| Green JAR Media Limited | Information & communication | 2017 |
| Green Lawn Properties Limited | Real estate | 2014 |
| Green Massala Limited | Hospitality | 2020 |
| Green Orchard Investments Ltd | Real estate | 2022 |
| Green Peak Solar Ltd | Construction | 2026 |
| Green Textiles PVT Ltd | Wholesale & retail | 2022 |
| Green Trading Ltd | Wholesale & retail | 2025 |
| Greenbond Properties Limited | Real estate | 2004 |
| Greenhill Granites Limited | Wholesale & retail | 2009 |
| Greenlight Softwares Ltd | Public administration | 2018 |
| Greenproject Property Management Limited | Households | 1990 |
| Greensward Properties Limited | Households | 1973 |
| Greenwood Enterprises UK Ltd | Information & communication | 1985 |
| Gregg Baker Limited | Wholesale & retail | 2001 |
| Gregory Davies Limited | Information & communication | 2007 |
| Greta Capital Ltd | Professional & scientific | 2014 |
| Grey FOX Construction Ltd | Construction | 2020 |
| Grey FOX Group Limited | Construction | 2020 |
| Grey FOX Holdings (Alton) Ltd | Professional & scientific | 2020 |
| Grey FOX Recycling Ltd | Water & waste | 2020 |
| Grid Education Ltd | Information & communication | 2025 |
| Griffins Building Services Limited | Construction | 1997 |
| Grimsby Developments Limited | Real estate | 2017 |
| Groundforce Experts Ltd | Construction | 2025 |
| Groundup Build Limited | Construction | 2026 |
| Group Winbewin Ltd | Financial services | 2025 |
| Grove Developments (Slough) Limited | Construction | 2022 |
| Grove Nursery Management Ltd | Education | 2011 |
| Grove Slough Limited | Construction | 2022 |
| Groveland 1 Property Limited | Real estate | 2025 |
| Groveland Property Limited | Construction | 2025 |
| Grovz Ltd | Wholesale & retail | 2025 |
| Grow Nova Ltd | Wholesale & retail | 2025 |
| Growing Good Limited | Agriculture & fishing | 2016 |
| Growmore Asset Management Limited | Real estate | 2022 |
| Gs&T Services Ltd | Construction | 2017 |
| GSW Automotive Limited | Wholesale & retail | 2024 |
| GT Formwork Ltd | Manufacturing | 2017 |
| Guardian Immigration Consultants Limited | Professional & scientific | 2019 |
| Guild Secretarial 1 Limited | Professional & scientific | 2022 |
| Guildford Print Finishers Limited | Manufacturing | 2006 |
| Guildhall Estates Holdings Limited | Real estate | 1970 |
| Gulshan International Investments Limited | Other services | 2019 |
| Gurukripa Consulting Limited | Information & communication | 2026 |
| Gusto Technologies Ltd | Information & communication | 2024 |
| Gutal Limited | Real estate | 2016 |
| Guzel Dezayns Ltd | Wholesale & retail | 2013 |
| GV Contract Services Ltd | Construction | 2019 |
| Gvlp Properties Limited | Real estate | 2025 |
| Gwyn the CUT Limited | Information & communication | 2010 |
| Gwynedd Homes Ltd | Construction | 2022 |
| GXA Technology Limited | Information & communication | 2026 |
| GXI Group Ltd | Extraterritorial | 2007 |
| GXI Ltd | Construction | 1996 |
| Gyhc Consulting Ltd | Professional & scientific | 2014 |
| Gym Constructions Ltd | Construction | 2020 |
| Gym Sweat Limited | Arts & recreation | 2021 |
| H & J Barnett Ltd | Financial services | 2023 |
| H & N Taxis Ltd | Wholesale & retail | 2017 |