| Gardi Motors Ltd | Wholesale & retail | 2026 |
| Gardiner & Co Property Surveyors Limited | Professional & scientific | 2026 |
| Gardiner (Holdings) Limited | Professional & scientific | 1989 |
| Gardiner Haskins Limited | Extraterritorial | 1997 |
| Gardiner,Sons & Co.,Limited | Wholesale & retail | 1893 |
| Gardner Wilson(Timber)Limited | Professional & scientific | 1955 |
| Gardrobe Ltd | Wholesale & retail | 2025 |
| Gareth Andrews Bodyshop Ltd | Wholesale & retail | 2017 |
| Gareth Mason Limited | Arts & recreation | 2021 |
| Gareth Strange Builders Limited | Construction | 2015 |
| Garfield Mews Management Limited | Households | 2013 |
| Garmik Investments Limited | Construction | 2009 |
| Garmotop Ltd | Construction | 2013 |
| Garner Investment Holdings Limited | Financial services | 2023 |
| Garnet Projects Ltd | Other services | 2022 |
| Garrad Balfour Limited | Professional & scientific | 2016 |
| Garrad Hancock Limited | Transport & logistics | 2014 |
| Garrett and Bradly Limited | Real estate | 2021 |
| Garrett Creative Ltd | Professional & scientific | 2020 |
| Garrett Employment Limited | Administrative & support | 2008 |
| Garrettco Limited | Real estate | 2017 |
| Garretts Gardens Ltd | Administrative & support | 2012 |
| Garretts Landscapes Ltd | Administrative & support | 2012 |
| Garrick Investments Limited | Professional & scientific | 2016 |
| Garry Pitcher Bricklaying Services Ltd | Construction | 2021 |
| Garstka Investments Limited | Real estate | 2022 |
| Garth Humphry Motors Limited | Wholesale & retail | 1974 |
| Garton House (Management) Limited | Hospitality | 1982 |
| Garuda Properties Ltd | Construction | 2015 |
| Garvex Logistic LP | | 2012 |
| Garwick Hill Limited | Wholesale & retail | 1999 |
| Gary Breckon Productions Limited | Information & communication | 2006 |
| Gary Britton (Electrical Contractor) Limited | Construction | 2011 |
| Gary Bunce Building Ltd | Construction | 2015 |
| Gary Clarke Consultancy Services Limited | Professional & scientific | 2022 |
| Gary Cornes Limited | Financial services | 2024 |
| Gary Drake Tennis (Wargrave) Limited | Extraterritorial | 1999 |
| Gary G Bond Limited | Construction | 2007 |
| Gary Griffiths Decorating Services Limited | Construction | 2001 |
| Gary Hargett Electrical Limited | Construction | 2002 |
| Gary Harris Cycles Limited | Wholesale & retail | 2015 |
| Gary Mundy Ltd | Construction | 2017 |
| Gary Penrice International Player Recruitment Ltd | Administrative & support | 2010 |
| Gary Robertson Construction Ltd | Construction | 2014 |
| GAS Flare Limited | Education | 2004 |
| GAS Girls Ltd | Education | 2019 |
| GAS Heating Services (Bristol) Limited | Construction | 2010 |
| GAS Investments Limited | Households | 2024 |
| GAS Panther Services Limited | Construction | 2022 |
| GAS Pro Plumbing Limited | Construction | 2021 |
| GAS Servwell Limited | Construction | 2003 |
| GAS Sure Service Limited | Manufacturing | 1998 |
| GAS Systems International Ltd | Professional & scientific | 2023 |
| GAS World Ltd | Construction | 1994 |
| Gasp Solutions (E) Limited | Agriculture & fishing | 2013 |
| Gasp Solutions (S) Limited | Agriculture & fishing | 2013 |
| Gasp Solutions Limited | Information & communication | 2008 |
| Gassem Limited | Hospitality | 2022 |
| Gastechno Energy & Fuels Holding (UK) Limited | Financial services | 2015 |
| Gastronomic Strategy Limited | Hospitality | 2026 |
| Gatcombe Analytics Ltd | Professional & scientific | 2018 |
| Gatcombe Property Management Company Limited | Real estate | 2026 |
| Gate 3 Properties Ltd | Real estate | 2022 |
| GATE5 Design Ltd | Professional & scientific | 2018 |
| Gatehouse Medical Ltd | Health & social care | 2019 |
| Gates Acquisitions Limited | Professional & scientific | 2010 |
| Gates Auto Parts Holdings China Limited | Professional & scientific | 2007 |
| Gates Consultancy Limited | Information & communication | 2013 |
| Gates Emea Holdings Limited | Financial services | 2021 |
| Gates Engineering & Services Global Limited | Professional & scientific | 2009 |
| Gates Engineering & Services UK Holdings Limited | Manufacturing | 2017 |
| Gates Engineering & Services UK Limited | Manufacturing | 2017 |
| Gates Finance Limited | Professional & scientific | 2003 |
| Gates Fluid Power Technologies Investments Limited | Professional & scientific | 2008 |
| Gates Holdings Limited | Professional & scientific | 2001 |
| Gates Industrial Corporation PLC | Manufacturing | 2017 |
| Gates Industrial Holdco Limited | Manufacturing | 2017 |
| Gates Treasury (Brazilian Real) Limited | Professional & scientific | 2008 |
| Gates Treasury (Canadian Dollar) Company | Professional & scientific | 2003 |
| Gates Treasury (Dollar) Company | Financial services | 2002 |
| Gates Treasury (Euro) Company | Financial services | 2002 |
| Gates Treasury (TRY) Limited | Professional & scientific | 2020 |
| Gates UK Finance Limited | Manufacturing | 2017 |
| Gates Worldwide Limited | Professional & scientific | 1925 |
| Gateshead Real Estates Ltd | Real estate | 2024 |
| Gateway Bristol Ltd | Education | 2025 |
| Gateway Diagnostics Limited | Transport & logistics | 2015 |
| Gateway Peterborough Management Company Limited | Real estate | 2011 |
| Gateway Realities Ltd | Extraterritorial | 2026 |
| Gateway to Being Ltd | Extraterritorial | 2024 |
| Gatewood Property Management Limited | Households | 1987 |
| Gather - Longlands Limited | Arts & recreation | 2025 |
| Gather Round Ltd | Real estate | 2018 |
| Gather UP Ltd | Arts & recreation | 2023 |
| Gathering Voices Limited | Education | 1985 |
| Gatt Holdings Ltd | Administrative & support | 2021 |
| Gatter Inc Limited | Financial services | 2024 |
| Gauabu Limited | Information & communication | 2025 |
| Gaudi Hair Ltd | Other services | 2003 |
| Gauntlet Development and Construction Company Limited | | 1986 |