| Guarding Nationwide Ltd | Administrative & support | 2016 |
| Guardlands Security Service Ltd | Administrative & support | 2023 |
| Guardline Security Ltd | Administrative & support | 2020 |
| Guards Services Ltd | Administrative & support | 2021 |
| GUARDS4WORK Security Limited | Administrative & support | 2016 |
| Guardsafe Security Services Limited | Administrative & support | 2025 |
| Guava 1 Ltd | Real estate | 2026 |
| Gudee Limited | Manufacturing | 2023 |
| Gudrum Limited | Extraterritorial | 2004 |
| Gudrum Classics Limited | Wholesale & retail | 2003 |
| Guerrilla Marquee & Event Crew Limited | Administrative & support | 2019 |
| Guest Cleaning Services Ltd | Administrative & support | 2020 |
| Guest, Keen and Nettlefolds, Limited | Extraterritorial | 1899 |
| Guestel Ltd | Real estate | 2025 |
| Guestly Ltd | Hospitality | 2025 |
| Guggar Real Estates Ltd | Real estate | 2025 |
| Gugs Mahi Limited | Professional & scientific | 2023 |
| GUH Accountants Limited | Financial services | 2021 |
| Guhring Limited | Manufacturing | 1973 |
| Guidance Essential Services Limited | Health & social care | 2013 |
| Guidance Housing Ltd | Real estate | 2019 |
| Guided Visions Ltd | Professional & scientific | 2025 |
| Guidedandco Ltd | Wholesale & retail | 2025 |
| Guides N Blanks Limited | Administrative & support | 2009 |
| Guiding Star Residence Ltd | Health & social care | 2023 |
| Guidinglight Finance Limited | Other services | 1993 |
| Guidinglight Investments Limited | Professional & scientific | 1989 |
| Guidotti London Ltd | Hospitality | 2024 |
| Guild Court (Bloxwich) Management Company Limited | Real estate | 2006 |
| Guildford Smiles Ltd | Health & social care | 2025 |
| Guinean Cleaning Company Ltd | Administrative & support | 2023 |
| Gujar Khan Halal Meat Ltd | Wholesale & retail | 2016 |
| Gujarati Rajput Samaj UK | Health & social care | 2015 |
| Gujjar Logistics Service Ltd | Transport & logistics | 2022 |
| GUK Security Services Limited | Administrative & support | 2021 |
| GUL Estates Ltd | Real estate | 2013 |
| GUL Medical Services Limited | Health & social care | 2019 |
| GUL Rahman Fruit and Vegetable Ltd | Wholesale & retail | 2025 |
| GUL Transfers Ltd | Transport & logistics | 2024 |
| Gul&Co Ltd | Real estate | 2023 |
| Gulaid Innovations Ltd | Transport & logistics | 2026 |
| Gulaid Ltd | Information & communication | 2017 |
| Gulam Zainub JI Ltd | Wholesale & retail | 2024 |
| Gulati Holdings Ltd | Real estate | 2020 |
| Gulati N Sons Ltd | Real estate | 2025 |
| Gulay Naaz Limited | Professional & scientific | 2025 |
| Gulbahar City Supermarket Limited | Wholesale & retail | 2024 |
| Gulerana Birmingham Ltd | Wholesale & retail | 2020 |
| Gulf Dream Limited | Construction | 2013 |
| Gulf Juice Ltd | Wholesale & retail | 2025 |
| Gulf Solarworks Ltd | Professional & scientific | 2025 |
| Gulfam Ellahi Dawakhana Ltd | Health & social care | 2025 |
| Gulix Distributors Ltd | Wholesale & retail | 2026 |
| Gulkari Styles Ltd | Wholesale & retail | 2020 |
| Gull Ahmad Housing Management Ltd | Real estate | 2025 |
| Gull Ahmad Investment Ltd | Real estate | 2019 |
| Gullab Construction Limited | Construction | 2025 |
| Gully Logistics Limited | Transport & logistics | 2019 |
| Gully Mini Market Ltd | Wholesale & retail | 2025 |
| Gullyfc Limited | Transport & logistics | 2025 |
| Gulmi Estate Limited | Real estate | 2024 |
| Gulshan Group Limited | Professional & scientific | 2018 |
| Gulson Productions Ltd Limited | Manufacturing | 2026 |
| Guluna Ltd | Wholesale & retail | 2025 |
| Gulzar Builders Ltd | Construction | 2024 |
| Gulzar Building Services Ltd | Construction | 2020 |
| Gulzar Memorial Ltd | Real estate | 2020 |
| Gulzare Habib Birmingham | Health & social care | 2019 |
| Gumbley’S Music School Ltd | Other services | 2023 |
| Gumpy TV Limited | Information & communication | 2012 |
| Gumthorn Lettings Limited | Real estate | 2025 |
| Gumthorn Ltd | Construction | 2023 |
| Gumthorn Structural Repairs Ltd | Construction | 2023 |
| Gun-Ansh Limited | Wholesale & retail | 2019 |
| Gun-Su Group Ltd | Arts & recreation | 2024 |
| Gung HO Communications Limited | Professional & scientific | 2000 |
| Gung HO Creative Studio Limited | Professional & scientific | 2022 |
| Gung HO Freestak Limited | Information & communication | 2021 |
| Gunk Ltd | Information & communication | 2025 |
| Gunmad Limited | Other services | 2016 |
| Gunmakers 1964 Limited | Extraterritorial | 2013 |
| Gunmakers by Mason Ltd | Hospitality | 2025 |
| Gunning Marketing Limited | Administrative & support | 2017 |
| Gunracks Ltd | Manufacturing | 2019 |
| Guowen Fang Ltd | Wholesale & retail | 2023 |
| GUP Shup Ltd | Hospitality | 2019 |
| Gupta Technologies Ltd | Information & communication | 2011 |
| Gupta, Ford & Parmar Limited | Real estate | 2015 |
| GUR Brothers Construction Limited | Construction | 2025 |
| GUR Enterprise (UK) Ltd | Wholesale & retail | 1996 |
| GUR Holdings Ltd | Real estate | 2021 |
| Guranteed Services Ltd | Transport & logistics | 2024 |
| Guraya Limited | Construction | 2023 |
| Gurbani Sweets Limited | Hospitality | 2024 |
| Gurdwara Bookings Limited | Information & communication | 2024 |
| Gurey Property Maintenance Ltd | Administrative & support | 2026 |
| Guribuilder Ltd | Administrative & support | 2021 |
| Guriga Limited | Manufacturing | 2026 |
| Gurkha Events Limited | Hospitality | 2025 |
| Gurkha Express Beeston Ltd | Hospitality | 2020 |