| GK Restaurant UK Limited | Hospitality | 2024 |
| Glasswood Management Limited | Real estate | 1980 |
| Glebe Avenue Limited | Real estate | 2023 |
| Glenn Etherington Physiotherapy Ltd | Health & social care | 2025 |
| Glidepath Investments Limited | Real estate | 2024 |
| Global Accounting Solutions Limited | Professional & scientific | 2006 |
| Global Energy Technology Ltd | Professional & scientific | 2008 |
| Global JET Limited | Transport & logistics | 2018 |
| Global Knowledge Ltd | Professional & scientific | 2020 |
| Global Property & Securities Ltd | Real estate | 2017 |
| Global Property and Developments Ltd | Real estate | 2019 |
| Global Property and Projects Ltd | Real estate | 2019 |
| Global Reach Development Ltd | Information & communication | 2012 |
| Global Talent Pool Ltd | Administrative & support | 2024 |
| Global Training Education and Consultancy Limited | Administrative & support | 2006 |
| Globalguru Limited | Administrative & support | 2022 |
| Globe Aesthetic and Medical Technologies Limited | Manufacturing | 1991 |
| Globe EV Ltd | Other services | 2018 |
| Globe Holdings Limited | Administrative & support | 2003 |
| Globe Microsystems Limited | Information & communication | 1991 |
| Globe Partners LLP | | 2012 |
| Globe Wealth Management Limited | Financial services | 2011 |
| Gloucester Court Residents Association Limited | Households | 1960 |
| Gmkd Limited | Construction | 2019 |
| GMT Builders Ltd | Construction | 2015 |
| Go Fresh Connect Ltd | Wholesale & retail | 2026 |
| Go Fresh International Ltd | Wholesale & retail | 2019 |
| GOD Gift Green Investment Ltd | Real estate | 2024 |
| Goddard Recruitment Associates Limited | Administrative & support | 2018 |
| Gogar Global Investments Ltd | Real estate | 2023 |
| Gojetters Limited | Administrative & support | 2023 |
| Golden Catch (Surbiton) Limited | Hospitality | 2026 |
| Golden Coach Investments Limited | Real estate | 2004 |
| Golden Key Interiors Ltd | Construction | 2021 |
| Golden Sapphire Events Limited | Administrative & support | 2024 |
| Golden Star Mining Ltd | Mining & quarrying | 2022 |
| Goldensun Distributors Limited | Wholesale & retail | 2024 |
| Goldrope Limited | Real estate | 2000 |
| Golfing Focus Limited | Information & communication | 2015 |
| Goliathus Logistics Ltd | Transport & logistics | 2019 |
| Goman Limited | Hospitality | 2026 |
| GON Fernandez Ltd. | Information & communication | 2017 |
| Good EGG Consulting Ltd | Professional & scientific | 2019 |
| Good Financial Services Ltd | Financial services | 2016 |
| Good Life Editing Limited | Information & communication | 2013 |
| Good Public Relations Limited | Professional & scientific | 2007 |
| Gooding Independent Trading Ltd | Wholesale & retail | 2022 |
| Goseberry Assist Ltd | Other services | 2019 |
| Gosia Brows Ltd | Other services | 2024 |
| GOT IT Covered Music Limited | Other services | 2015 |
| Gowell Developments Ltd | Construction | 2021 |
| Goya Theatre Company Ltd | Arts & recreation | 2022 |
| GP Plant Ltd | Administrative & support | 2026 |
| GP9 Limited | Information & communication | 2019 |
| GPD Property Investments Ltd | Real estate | 2021 |
| GPM Delights Pugliesi Ltd | Wholesale & retail | 2020 |
| GR Collective Ltd | Professional & scientific | 2025 |
| Graborne Holdings Ltd | Administrative & support | 2021 |
| Graborne Investments Ltd | Administrative & support | 2023 |
| Graborne Property Co. Limited | Administrative & support | 1961 |
| Gracekal Love & Above Homecare Ltd | Health & social care | 2021 |
| Gracekhal Ltd | Health & social care | 2018 |
| Graceland Property Sourcing Limited | Real estate | 2016 |
| Graham Downes Ltd | Professional & scientific | 2024 |
| Grahame Solutions Limited | Professional & scientific | 2013 |
| Grand Dawat Banquet Hall Ltd | Real estate | 2026 |
| Granite Hill Partners Ltd | Real estate | 2025 |
| GRB Accountancy Limited | Professional & scientific | 2013 |
| Great Futures Global Ltd | Administrative & support | 2023 |
| Great Wall Management Ltd | Construction | 2025 |
| Greek Events Ltd | Hospitality | 2025 |
| Green Assets Holdings Limited | Real estate | 2025 |
| Green Bird Holdings Limited | Financial services | 2020 |
| Green Dene Ltd | Real estate | 2018 |
| Green Event Management Limited | Administrative & support | 2006 |
| Green Flame Research Limited | Professional & scientific | 2009 |
| Green Genie Home Solutions Ltd | Real estate | 2023 |
| Green Planet Recycle Limited | Water & waste | 2026 |
| Green Quartz Properties Ltd | Real estate | 2021 |
| Green Silk Ltd | Real estate | 2021 |
| Green Spider Climbing Limited | Arts & recreation | 2018 |
| Green Tape (MGT) Ltd | Real estate | 2012 |
| Greener Court Residents Association Limited | Households | 2000 |
| Greengable Builders Limited | Construction | 2024 |
| Greenland Zone Ltd | Wholesale & retail | 2025 |
| Greenshield Tree & Fencing Ltd | Administrative & support | 2026 |
| Grey Hurst Construction Limited | Construction | 2019 |
| Grey Willow Books Ltd | Information & communication | 2024 |
| Greyafro Consulting Limited | Professional & scientific | 2013 |
| Greyhound Film Distribution Limited | Information & communication | 2021 |
| Greylin Green Ltd | Professional & scientific | 2021 |
| Grit Limited | Other services | 2007 |
| Grooter Hoogte Investments Ltd | Real estate | 2022 |
| Groundworks and Steelworks London Ltd | Construction | 2026 |
| Grout Pro KM Ltd | Construction | 2013 |
| Grove Lodge Residents Company Limited | Households | 1995 |
| Grovetowns Southern Limited | Financial services | 2017 |
| Grow Property Investments Ltd | Real estate | 2020 |
| Growlodge Limited | Households | 1981 |
| Growthscape UK Ltd | Real estate | 2022 |