| Gallagher Gardens Limited | Administrative & support | 2015 |
| Galvil Property Ltd | Real estate | 2019 |
| Ganga Kashi 2 Limited | Real estate | 2022 |
| Gann Group Ltd | Administrative & support | 2024 |
| Garbally Services Limited | Professional & scientific | 2005 |
| Garden Angels London Ltd | Arts & recreation | 2018 |
| Garden Creations Limited | Administrative & support | 2009 |
| Garden Media Limited | Information & communication | 2025 |
| Gardenline Limited | Administrative & support | 2024 |
| Gardens for Life Maintenance Ltd | Administrative & support | 2018 |
| Gardiner Couriers Ltd | Transport & logistics | 2021 |
| Gareth Bertram Commercial Ltd | Real estate | 2019 |
| Gareth Bertram Ltd | Real estate | 2018 |
| Gargi Ltd | Wholesale & retail | 2022 |
| Garrido Berman Limited | Information & communication | 2013 |
| Gary Sharpe Hair & Beauty Limited | Other services | 2016 |
| GAS Plumbing Ltd | Construction | 2012 |
| Gaspro Heating Ltd | Construction | 2020 |
| Gastom Limited | Construction | 2012 |
| Gate Lodge (Hartley Court) Limited | Real estate | 2006 |
| Gate Lodge (Kingston Court) Limited | Real estate | 2005 |
| Gaut Limited | Construction | 1993 |
| Gavin Martin Colournet Limited | Manufacturing | 1991 |
| Gazdar Consultancy Ltd | Administrative & support | 2018 |
| Gazeatsecu.Re Ltd | Information & communication | 2024 |
| Gaziantep Patisserie Limited | Other services | 2020 |
| GB Creative Ltd | Professional & scientific | 2024 |
| GB Designers Build Ltd | Construction | 2022 |
| GB Facades Ltd | Extraterritorial | 2023 |
| GB Luxe Medic Ltd | Health & social care | 2024 |
| GB Moon Cars Ltd | Transport & logistics | 2026 |
| GBK Engineering Limited | Construction | 2008 |
| GBS Construction (Herts) Limited | Construction | 2019 |
| GBS Construction Contracts Ltd | Construction | 2016 |
| GBS Groundwork and Landscape Ltd | Administrative & support | 2016 |
| Gcbt Hardware Ltd | Wholesale & retail | 2025 |
| GCK Consulting Limited | Administrative & support | 2017 |
| GCL Property Group Ltd | Households | 2020 |
| Gctt Investments Ltd | Real estate | 2017 |
| GD Property Developments Ltd | Real estate | 2023 |
| GDC Heating Ltd | Construction | 2011 |
| GDH Designs Limited | Construction | 2002 |
| GDV Studio Ltd | Professional & scientific | 2020 |
| Gears and Motor Ltd | Wholesale & retail | 2025 |
| GEE Damji & Associates Limited | Professional & scientific | 2026 |
| GEE Maintenance Limited | Construction | 2013 |
| Geeda (Gender Education & Enterprise Development for Africa) Ltd | Professional & scientific | 2014 |
| GEM Trinkets Limited | Manufacturing | 2017 |
| Gemark Limited | Professional & scientific | 2008 |
| Gemlight Limited | Real estate | 2004 |
| Gems of East Africa Limited | Wholesale & retail | 2013 |
| Gemstone Masters Limited | Wholesale & retail | 2010 |
| Gemstones of East Africa Ltd | Wholesale & retail | 2019 |
| GEN Business Solutions Limited | Information & communication | 2001 |
| Gen-R Law Limited | Professional & scientific | 2023 |
| Gen-R Law UK LLP | | 2023 |
| Gen.Ddi Limited | Professional & scientific | 2016 |
| Genepi Huit Ltd | Financial services | 2021 |
| Genesis Mind and Body Limited | Arts & recreation | 2010 |
| Genesis Professional Limited | Information & communication | 2017 |
| Genesis Prolink UK Ltd | Real estate | 2026 |
| Genesis Security Limited | Information & communication | 2015 |
| Gent Craft Ltd | Wholesale & retail | 2026 |
| Gent to LET Ltd | Real estate | 2024 |
| Gentian Builder Ltd | Construction | 2020 |
| Gentle Hands Care Agency Ltd | Health & social care | 2011 |
| Gentle Hands Care Homes Ltd | Health & social care | 2011 |
| Genuine Products Ltd | Wholesale & retail | 2025 |
| GEO Properties Limited | Construction | 2015 |
| Geodomi Ltd | Construction | 2017 |
| Geoenergy Partners Limited | Financial services | 2022 |
| Geoenergy Solutions Limited | Financial services | 2020 |
| Geoffrey Rowe Furniture Limited | Manufacturing | 2006 |
| Geoflo Healthcare Limited | Professional & scientific | 2011 |
| Geofrac Ltd | Transport & logistics | 2018 |
| Geometris Limited | Construction | 2013 |
| Geomex Software Solutions Limited | Administrative & support | 2019 |
| George Eckert Limited | Real estate | 2014 |
| George TJ Ltd | Construction | 2018 |
| George's (Bourne) Limited | Hospitality | 2014 |
| George's Car Sales Limited | Wholesale & retail | 2009 |
| Georgenie Ltd | Financial services | 2015 |
| Georges Road Ltd | Construction | 2017 |
| Georgi & Camilla Property Ltd | Real estate | 2023 |
| Georgie Porgy Limited | Administrative & support | 2013 |
| Georgiou Investments Limited | Real estate | 2022 |
| Georgiou UK Properties Ltd | Real estate | 2021 |
| Gerradon Properties Limited | Real estate | 1964 |
| GET Engineering Ltd | Professional & scientific | 2019 |
| GET Fixed' IT Services Ltd. | Education | 2011 |
| GET RID Limited | Water & waste | 2019 |
| Getcounsel Limited | Information & communication | 2024 |
| Getting Limited | Professional & scientific | 2018 |
| GF Resourcing Ltd | Professional & scientific | 2007 |
| Gfleur Ltd | Wholesale & retail | 2025 |
| GG Recreation Ltd | Hospitality | 2019 |
| GG Shipping UK Ltd | Transport & logistics | 2015 |
| GG44 Ltd | Manufacturing | 2018 |
| Ggac Limited | Administrative & support | 2017 |
| GGH (Sempora) Limited | Other services | 2024 |