| Gastronobase Ltd | Wholesale & retail | 2022 |
| Gatm Consulting Limited | Professional & scientific | 2013 |
| Gaya's Cakes Limited | Manufacturing | 2019 |
| Gayatri Engineering and Consulting Services Ltd | Professional & scientific | 2007 |
| Gayatri Healthcare Limited | Wholesale & retail | 2024 |
| Gayatri Trading Limited | Wholesale & retail | 2011 |
| GB Autos Volvo Specialist Limited | Wholesale & retail | 2014 |
| GB Maintenance Property Services Ltd | Construction | 2020 |
| GB Multitrade Construction Ltd | Construction | 2025 |
| GB Psalms Limited | Other services | 2010 |
| GBN Building Services Ltd | Construction | 2014 |
| GCC Direct Limited | Administrative & support | 2011 |
| GCC UK Investments Limited | Financial services | 2017 |
| Gcgi Limited | Education | 2021 |
| Gcseguru Ltd | Wholesale & retail | 2026 |
| GDP Design & Build Ltd | Construction | 2018 |
| GDP Lettings Limited | Real estate | 2021 |
| GDW Consulting Ltd | Other services | 2015 |
| Gdwn LED Ltd | Manufacturing | 2025 |
| GE Star Enterprises Limited | Hospitality | 2023 |
| Geeks Holdings Limited | Information & communication | 2021 |
| Geeks Ltd | Information & communication | 2007 |
| GEM Cooling Ltd | Extraterritorial | 2022 |
| Gemt Ltd | Real estate | 2018 |
| Gen-Z Recruitment Limited | Administrative & support | 2023 |
| General Builders LR Limited | Construction | 2025 |
| Genesis Invest Holding Ltd | Financial services | 2026 |
| Genesis Services Ltd | Administrative & support | 2019 |
| Genius Academy Ltd | Education | 2023 |
| Genius Academy Plus Ltd | Education | 2025 |
| Geniusminds Limited | Information & communication | 2014 |
| Gensechub Ltd | Information & communication | 2025 |
| Gentechub Ltd | Information & communication | 2024 |
| George's Dog Boutique Ltd | Other services | 2022 |
| Georgina Alexander Weddings & Events Limited | Administrative & support | 2015 |
| Gera Holdings & HR Solutions Limited | Professional & scientific | 2017 |
| Gera Renovation Ltd | Construction | 2026 |
| Gesoft Software Ltd | Information & communication | 2017 |
| GET Planning and Architecture Ltd | Professional & scientific | 2011 |
| GET Planning Limited | Professional & scientific | 2009 |
| GET Shorty Ltd | Information & communication | 2016 |
| GGM Horizons Care Ltd | Health & social care | 2026 |
| GHL Communications Limited | Manufacturing | 2019 |
| GHM Clothing Ltd | Manufacturing | 2013 |
| GHS Elite Ltd | Transport & logistics | 2025 |
| GI Facade Ltd | Construction | 2020 |
| GI Properties Surrey Limited | Real estate | 2019 |
| Giants in the Sky Ltd | Arts & recreation | 2026 |
| Giants in the Sky TOO Ltd | Arts & recreation | 2026 |
| Gibsons Games Ltd | Manufacturing | 1919 |
| Gide International Limited | Information & communication | 2005 |
| Gifa Education Group Ltd | Education | 2024 |
| Gifts 4 U 80 Ltd | Wholesale & retail | 2022 |
| Gihani Senanayake Ltd | Health & social care | 2025 |
| Gihi Associates Limited | Professional & scientific | 1997 |
| GIN Genie London Limited | Hospitality | 2017 |
| Gincaz Limited | Professional & scientific | 2010 |
| Girls' Learning Trust | Education | 2011 |
| Give IT a TRI Ltd | Education | 2023 |
| GIZ Limited | Wholesale & retail | 2025 |
| GJ Developments (London) Ltd | Construction | 2025 |
| GJC Sutton UK Ltd | Hospitality | 2018 |
| GK Software Development Services Limited | Information & communication | 2016 |
| GKN Constructions Ltd | Construction | 2010 |
| GL Services Ltd | Construction | 2007 |
| GL Trading Limited | Hospitality | 2016 |
| GL Ventures Ltd | Financial services | 2018 |
| Gladsaxe United RTM Company Limited | Households | 2022 |
| Gladstones HC Limited | Other services | 2003 |
| Glam Bar Ltd | Other services | 2020 |
| Glamour Garage Limited | Other services | 2016 |
| Glass Construct Limited | Construction | 2019 |
| Glassington Property Ltd | Real estate | 2025 |
| Glazing House Ltd | Construction | 2021 |
| Glenangels Childcare Limited | Health & social care | 2024 |
| Glenthorp Limited | Administrative & support | 2010 |
| GLO on the Go Limited | Other services | 2021 |
| Global Bioflex Ltd | Wholesale & retail | 2010 |
| Global Cognos Limited | Information & communication | 2011 |
| Global Concept (U.K) Ltd | Extraterritorial | 2013 |
| Global Digital Assets Limited | Extraterritorial | 2021 |
| Global E&M Ltd | Construction | 2022 |
| Global Eyes Recruitment Limited | Real estate | 2013 |
| Global IT Geeks Limited | Information & communication | 2021 |
| Global Live Events LLP | | 2011 |
| Global Nomad UK Travel Agent Ltd | Administrative & support | 2020 |
| Global Protection Network Ltd | Administrative & support | 2023 |
| Global Recruitment Management Ltd | Administrative & support | 2022 |
| Global Refurbishment Limited | Construction | 2010 |
| Global Tamils' Helping Hands Ltd | Education | 2021 |
| Global Tours and Travels LDN Ltd | Administrative & support | 2025 |
| Global Trade Ventures Ltd | Manufacturing | 2015 |
| Global Trading Solutions Limited | Wholesale & retail | 2009 |
| Globalnest Traders Ltd | Wholesale & retail | 2026 |
| Globe Trade Overseas Ltd | Wholesale & retail | 2019 |
| Glorious Brands Ltd. | Wholesale & retail | 2010 |
| Glorious Fast Services Ltd | Hospitality | 2019 |
| Glorious Futurity Ltd | Professional & scientific | 2025 |
| Glorious Gourmet Burger Ltd | Real estate | 2023 |
| Glorious Heritage Help and Support Ltd | Wholesale & retail | 2025 |