| Galleon Wharf Holdco Limited | Financial services | 2022 |
| Galleon Wharf Limited | Real estate | 2018 |
| Galley 41 Ltd | Administrative & support | 2023 |
| Gallium Dynamics Ltd | Information & communication | 2020 |
| Galltow Ltd | Hospitality | 2021 |
| Galíni Lifestyle Ltd | Manufacturing | 2024 |
| Gamashi Capital Ltd | Real estate | 2025 |
| Game Box Fresh Limited | Hospitality | 2020 |
| Gamebranch Ltd | Information & communication | 2023 |
| Games for MAY Limited | Information & communication | 2017 |
| Games Yard Management Company Limited | Households | 2003 |
| Gami House Limited | Real estate | 2024 |
| Ganileon Ltd | Transport & logistics | 2026 |
| Gantt Consulting Limited | Professional & scientific | 2015 |
| Gaojo Investments Ltd | Real estate | 2024 |
| GAP Bookkeeping Limited | Construction | 2019 |
| GAP Home Improvements Ltd. | Construction | 2011 |
| Gapio(Europe) Ltd | Administrative & support | 2010 |
| Gappa Ltd | Manufacturing | 2020 |
| Garage Doors (Luton) Limited | Manufacturing | 2015 |
| Garage Girl UK Media Ltd | Professional & scientific | 2026 |
| Garage Twenty Ltd | Wholesale & retail | 2022 |
| Garande Edmund Limited | Other services | 2011 |
| Garcha Management Ltd | Real estate | 2017 |
| Garden Products Limited | Wholesale & retail | 2003 |
| Gardentec Innovations Ltd | Wholesale & retail | 2025 |
| Gareth Burrows Associates Limited | Professional & scientific | 2009 |
| Gargoyle Distribution Limited | Wholesale & retail | 1999 |
| Garlic and Ginger Ltd | Hospitality | 2022 |
| Garlina Limited | Administrative & support | 2017 |
| Garlina Properties Ltd | Hospitality | 2023 |
| Garmar Holdings Limited | Extraterritorial | 2008 |
| Garmar Services Limited | Wholesale & retail | 2008 |
| Garmar Trading Limited | Extraterritorial | 2008 |
| Garner Associates LLP | | 2007 |
| Garofalo & Ricciardi Properties Ltd | Real estate | 2020 |
| Garrig Limited | Information & communication | 2007 |
| Garritano Financial Services Limited | Financial services | 2003 |
| Garston Power Limited | Energy | 2014 |
| Gary Lion Estates Ltd | Real estate | 2025 |
| GAS Management Consultant Ltd | Professional & scientific | 2018 |
| GAS Strut Engineering Limited | Manufacturing | 2007 |
| Gascoigne Wood Power Limited | Energy | 2016 |
| Gatehouse Apostolic Ministries International | Other services | 2006 |
| Gatesmead Management Company Limited | Households | 2026 |
| Gateway Housing & Community Services Limited | Hospitality | 2011 |
| Gateway PAY Limited | Information & communication | 2023 |
| Gath Developments Ltd | Real estate | 2025 |
| Gaughan Ltd | Construction | 2022 |
| Gaughan Property Limited | Real estate | 2024 |
| Gayhurst Court Management Company Limited | Households | 1973 |
| Gazeley Painting Ltd | Construction | 2018 |
| GB Accounting Solutions Limited | Professional & scientific | 2010 |
| GB Beauty Empire Ltd | Other services | 2026 |
| GB Homes Development Ltd | Construction | 2020 |
| GB JMD Motors Limited | Wholesale & retail | 2020 |
| GB Kitchen & Bedrooms Ltd | Wholesale & retail | 2024 |
| GB Smart Line Ltd | Manufacturing | 2018 |
| GBA Developments Ltd | Construction | 2018 |
| Gbare Construction Limited | Construction | 2018 |
| GBP Ltd | Professional & scientific | 2019 |
| GC EKE Limited | Public administration | 2019 |
| GC Flat Roofing Limited | Construction | 2007 |
| GC London Holdings Limited | Financial services | 2025 |
| GC Planning Partnership Limited | Professional & scientific | 2009 |
| GC Woburn Upvc Ltd | Construction | 2022 |
| GCG & Construction Limited | Construction | 2024 |
| GCL Property Consultants Ltd | Real estate | 2025 |
| GCR Bedford Limited | Construction | 2016 |
| Gcrl Limited | Administrative & support | 2005 |
| GD23 Property Ltd | Real estate | 2023 |
| GDA Electrical Wholesaler Ltd | Wholesale & retail | 2016 |
| GDC Media Limited | Information & communication | 2021 |
| GDI Markets Ltd | Financial services | 2006 |
| GDX Interactive Ltd | Information & communication | 2014 |
| GDX Solutions Ltd | Information & communication | 2004 |
| Ge-Mac Systems Limited | Other services | 1996 |
| GEA Cleaning Services Ltd | Administrative & support | 2026 |
| Gecko Creative Graphics Limited | Wholesale & retail | 2013 |
| Gecko Electrical Solutions Ltd | Administrative & support | 2024 |
| Geco Repairs Ltd | Wholesale & retail | 2024 |
| Gedc Limited | Construction | 2025 |
| Gedion Ltd | Administrative & support | 2020 |
| Geek Music LLP | | 2024 |
| Geek Retreat Store Nine Ltd | Wholesale & retail | 2021 |
| Gekaldi | Other services | 2013 |
| Gelato Sundaes Limited | Administrative & support | 2016 |
| Geldonia Court Ltd | Real estate | 2022 |
| GEM Collective Talent Ltd | Professional & scientific | 2026 |
| GEM Scents Home Fragrance Ltd | Wholesale & retail | 2026 |
| GEM Xander Limited | Wholesale & retail | 2025 |
| Gemcar Metech Limited | Professional & scientific | 2005 |
| Gemini Cars Limited | Transport & logistics | 2011 |
| Gemini Lock & Safe Limited | Administrative & support | 2003 |
| Geminii. Williams Financial Broker Ltd | Wholesale & retail | 2021 |
| Gemmas Baps Ltd | Hospitality | 2026 |
| Gemz Properties Ltd | Households | 2024 |
| GEN4 Limited | Manufacturing | 2022 |
| GENER8 Renewables Ltd | Construction | 2025 |
| General Practice Plus UK Ltd. | Health & social care | 2012 |