| Gaussian Ventures Global Limited | Financial services | 2021 |
| GAV & AFF Ltd | Wholesale & retail | 2014 |
| Gavastie Group Ltd | Wholesale & retail | 2021 |
| Gavin Davis TM Ltd | Other services | 2019 |
| Gavin Groundworks Ltd | Construction | 2018 |
| Gavin J Martin Ltd | Construction | 2013 |
| Gaw.Rail Ltd | Construction | 2017 |
| Gawi Live Limited | Information & communication | 2025 |
| Gawnen Construction Limited | Construction | 2013 |
| Gaya Holdings Limited | Construction | 2022 |
| Gayatri Private Ltd | Wholesale & retail | 2018 |
| Gayle Property Solutions Limited | Real estate | 2015 |
| Gaynor Group Limited | Real estate | 1998 |
| Gaysha Surfaces Limited | Professional & scientific | 2011 |
| Gaytee Ltd | Wholesale & retail | 2025 |
| Gazal Corp Ltd | Professional & scientific | 2022 |
| Gaze Technologies UK Ltd | Information & communication | 2025 |
| Gazi & Choudhury Limited | Hospitality | 2025 |
| Gaziabbas Limited | Wholesale & retail | 2025 |
| Gazingcloud Limited | Information & communication | 2021 |
| Gazingcloud Solutions Ltd | Information & communication | 2025 |
| Gazioglu Ltd | Wholesale & retail | 2025 |
| Gazmaki Solutions Ltd | Wholesale & retail | 2021 |
| Gazzer Ltd | Wholesale & retail | 2020 |
| GB (Mechanical) Associates Ltd | Professional & scientific | 2015 |
| GB Academic Consultancy Ltd | Education | 2025 |
| GB Antiques & Collectables Ltd | Wholesale & retail | 2026 |
| GB Aures Ltd | Manufacturing | 2025 |
| GB Doors Ltd | Manufacturing | 2024 |
| GB Energy Consultants Ltd | Hospitality | 2019 |
| GB England Ltd | Real estate | 2019 |
| GB Heating & Plumbing Contractors Ltd | Other services | 2019 |
| GB Import Export Ltd | Wholesale & retail | 2021 |
| GB Industrial Doors Limited | Manufacturing | 2012 |
| GB Marginal Gains Limited | Professional & scientific | 2019 |
| GB Roofing & Building Ltd | Construction | 2024 |
| GB Sash Window Specialist Ltd | Manufacturing | 2025 |
| GB South West Property Limited | Real estate | 2020 |
| GB Vehicle Services Ltd | Wholesale & retail | 2026 |
| Gb-Sol Limited | Professional & scientific | 2001 |
| Gb-Sol Projects Limited | Construction | 2011 |
| GBA Property Ltd | Real estate | 2025 |
| GBC Inspections Limited | Professional & scientific | 2013 |
| Gbcm Ventures Ltd | Professional & scientific | 2023 |
| GBE (Chartist) Limited | Real estate | 2017 |
| GBE (Westfield) Limited | Real estate | 1998 |
| GBF Motor Factors Limited | Wholesale & retail | 2025 |
| Gbkrent Ltd | Manufacturing | 2025 |
| Gblr Properties Limited | Real estate | 2016 |
| Gblrise Ltd | Wholesale & retail | 2024 |
| Gbonlinemedia Limited | Information & communication | 2014 |
| GBP PAY Ltd | Administrative & support | 2024 |
| Gbpkhr Mart Ltd | Wholesale & retail | 2025 |
| Gbplux Ltd | Education | 2019 |
| GBU Construct Ltd | Construction | 2025 |
| GC Capital Partners Limited | Financial services | 2025 |
| GC Cars and Commercials Ltd | Wholesale & retail | 2020 |
| GC Financial (London) Ltd | Financial services | 2020 |
| GC Investment Properties Limited | Real estate | 2025 |
| GC Legacy Partners Limited | Financial services | 2025 |
| GC Print Limited | Manufacturing | 1952 |
| GC Shipping LP | | 2018 |
| GCC MED Ltd | Wholesale & retail | 2025 |
| Gcce New Build Ltd | Construction | 2014 |
| Gcen Imaging Limited | Health & social care | 2025 |
| GCM Support Services Limited | Professional & scientific | 2009 |
| Gcms Properties Limited | Professional & scientific | 2014 |
| Gcore Digital Ltd | Wholesale & retail | 2021 |
| GCP Cleaning Services Ltd | Administrative & support | 2018 |
| Gcpe 1 Limited | Financial services | 2024 |
| GCR 2017 Ltd | Administrative & support | 2026 |
| GCR Catalin Services Limited | Construction | 2020 |
| GCS Construction PC | | 2015 |
| GD Lounge Cardiff Ltd | Hospitality | 2026 |
| GDB Driving Group Ltd | Transport & logistics | 2019 |
| Gdbgr Ltd | Hospitality | 2024 |
| Gddonaghy Ltd | Information & communication | 2023 |
| GDE Property Ltd | Real estate | 2019 |
| Gdeconsultant Ltd | Information & communication | 2022 |
| Gdegrees Ltd | Wholesale & retail | 2025 |
| Gdem Ltd | Professional & scientific | 2018 |
| Gdhl Global Limited | Professional & scientific | 2014 |
| Gdmc Construction Ltd | Construction | 2024 |
| Gdmj Limited | Real estate | 2017 |
| Gdsjn Ltd | Wholesale & retail | 2026 |
| GDW Installations Limited | Construction | 2012 |
| GE Cooling Limited | Construction | 2016 |
| Geamy Ltd | Wholesale & retail | 2024 |
| Gearistan Ltd | Wholesale & retail | 2025 |
| Gebeleizis Ltd | Wholesale & retail | 2025 |
| Gebogames Digital Limited | Construction | 2024 |
| Gece Contracting Limited | Construction | 2006 |
| Gece Software Ltd | Information & communication | 2025 |
| Gecko Film Productions Ltd | Information & communication | 2024 |
| Gecko Web Solutions Ltd | Information & communication | 2012 |
| Gecomex Ltd | Wholesale & retail | 2024 |
| Gecommerce Ltd | Professional & scientific | 2024 |
| Gecs Decor Ltd | Construction | 2018 |
| GED Aesthetics Limited | Health & social care | 2021 |
| Gediminas Traders Ltd | Administrative & support | 2020 |