| GT Northwest Maintenance Limited | Other services | 2020 |
| GT Platform Limited | Information & communication | 2023 |
| GT RS Developments Ltd | Real estate | 2025 |
| GT Soft Furnishings Limited | Wholesale & retail | 2017 |
| GT Trans Limited | Administrative & support | 2015 |
| GT3 Investments Ltd | Real estate | 2023 |
| GT40 Goldparts.Com Limited | Manufacturing | 2012 |
| GTA Finance Limited | Financial services | 2023 |
| GTA Medical Services Ltd | Health & social care | 2012 |
| GTA North Limited | Professional & scientific | 2015 |
| GTB Stores Ltd | Wholesale & retail | 2020 |
| GTC Europe Limited | Wholesale & retail | 2019 |
| GTC Logistics Ltd | Transport & logistics | 2025 |
| GTD GMS Limited | Health & social care | 2011 |
| GTD Healthcare Limited | Financial services | 2019 |
| GTD Primary Care Limited | Health & social care | 2008 |
| GTF Ltd | Hospitality | 2015 |
| GTF United Ltd | Other services | 2015 |
| Gtfmotor Limited | Wholesale & retail | 2025 |
| GTG Global Limited | Information & communication | 2026 |
| GTH Building Limited | Construction | 2025 |
| GTI Engineering Limited | Extraterritorial | 1998 |
| GTK Mechanical Services Limited | Manufacturing | 2015 |
| GTL Drivers Ltd | Transport & logistics | 2023 |
| GTM Fire Suppression Limited | Construction | 2022 |
| GTM Panacea Limited | Professional & scientific | 2021 |
| Gtmc Entertainment Limited | Wholesale & retail | 2015 |
| GTN Contracting Services Limited | Construction | 2017 |
| GTR (Holdings) Ltd | Information & communication | 2003 |
| Gtrlogistics Ltd | Transport & logistics | 2026 |
| GTS Electrical Services Limited | Construction | 2006 |
| GTS Events Support UK Ltd | Administrative & support | 2019 |
| GTS Solutions Allianse LLP | | 2013 |
| Gtst Multitrades Ltd | Administrative & support | 2022 |
| GTV (MK) Limited | Manufacturing | 2025 |
| GU International Ltd | Administrative & support | 2023 |
| GU Software Limited | Professional & scientific | 2018 |
| GU Technology Ltd | Administrative & support | 2024 |
| Gu.Stewart Limited | Transport & logistics | 2025 |
| Guangdong Guangou Technology Co., Ltd | Extraterritorial | 2021 |
| Guanguan Bakery Limited | Hospitality | 2025 |
| Guangzhou Barkat International Trading Co., Ltd | Extraterritorial | 2023 |
| Guangzhou Canova Heating & Refrigeration Equipment Co., Ltd | Extraterritorial | 2020 |
| Guangzhou Leader Beauty Leather Co., Ltd | Extraterritorial | 2012 |
| Guangzhou Taosong Trading Co., Ltd. | Wholesale & retail | 2023 |
| Guapo Homes Ltd | Real estate | 2025 |
| Guaranteed Rent Hub Limited | Real estate | 2020 |
| Guaranteed Tenants Ltd | Administrative & support | 2010 |
| Guard Environmental Consultancy Ltd | Professional & scientific | 2017 |
| Guard-Pro Limited | Manufacturing | 2018 |
| Guardia BCN Ltd | Wholesale & retail | 2024 |
| Guardian Angels Quality Wrap Around Care Limited | Health & social care | 2013 |
| Guardian Bell Limited | Information & communication | 2021 |
| Guardian Care Agency Ltd | Health & social care | 2025 |
| Guardian Chain Ltd | Professional & scientific | 2025 |
| Guardian DPS Limited | Construction | 2008 |
| Guardian Estates MCR Ltd | Real estate | 2024 |
| Guardian Fittings Ltd | Construction | 2017 |
| Guardian Gems Ltd | Health & social care | 2024 |
| Guardian Knitwear Limited | Manufacturing | 1993 |
| Guardian Management Solutions Ltd | Financial services | 2024 |
| Guardian Medical Ltd | Health & social care | 2024 |
| Guardian Mews Limited | Households | 2016 |
| Guardian Property Cover Ltd | Financial services | 2020 |
| Guardian Safety Solutions Limited | Administrative & support | 2010 |
| Guardian Security 247 Ltd | Administrative & support | 2025 |
| Guardian Structural Ltd | Construction | 2021 |
| Guardian Vertex Security Services Ltd | Administrative & support | 2024 |
| Guardians Muti-Dimensional Development Ltd | Financial services | 2025 |
| Guardis Ltd | Information & communication | 2025 |
| Guardware Cyber Security Ltd | Information & communication | 2025 |
| Guavamelon Consulting Limited | Professional & scientific | 2022 |
| Gubabi Ltd | Real estate | 2020 |
| Gubari for Trading Ltd | Wholesale & retail | 2024 |
| Gucci.Fba Ltd | Wholesale & retail | 2026 |
| Guchy Enterprise Limited | Wholesale & retail | 2017 |
| Gude Import & Export Co., Limited | Wholesale & retail | 2021 |
| Gudmoney Ventures Ltd | Financial services | 2025 |
| Gudtouch Limited | Professional & scientific | 2012 |
| Gudz Designs Ltd | Wholesale & retail | 2024 |
| Guedes Real Estate Ltd | Real estate | 2024 |
| Guerra Capital Group Limited | Administrative & support | 2020 |
| Guerrilla Marketing Ltd | Professional & scientific | 2016 |
| Guerro Ltd | Wholesale & retail | 2021 |
| Guest Favourite Ltd | Hospitality | 2024 |
| Guest Inn Limited | Real estate | 2019 |
| Guest Investments Holdings Ltd | Financial services | 2025 |
| Guest Investments Ltd | Administrative & support | 1998 |
| Guest Shack Ltd | Real estate | 2023 |
| GUEST365 Limited | Real estate | 2020 |
| Guestify Limited | Hospitality | 2026 |
| Guestwork Limited | Information & communication | 2026 |
| Guevara (MCR) Limited | Transport & logistics | 2018 |
| Guffaw Digital Limited | Information & communication | 2017 |
| Gugan and Dumbo Ltd | Wholesale & retail | 2025 |
| Guglotok Ltd | Wholesale & retail | 2025 |
| Gugutravel Ltd | Transport & logistics | 2025 |
| Guidance and Publications Strategic Consulting Ltd | Information & communication | 2022 |
| Guide Financial Limited | Professional & scientific | 2025 |
| Guide Property Management Limited | Financial services | 2024 |